• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    method and apparatus for estimating a well-hole geometry that penetrates the earth. a method for estimating the geometry of a well hole (2) that penetrates the earth is disclosed. the method includes: making a plurality of well hole measurements (2) with a calibrator with n transducers a plurality of times, where for each moment a set of measurements comprises measurements made by the n transducers at that time: division of a section cross-section of the borehole (2) in s sectors; obtaining an estimate of the geometry of the borehole (2) through the connection of points of representative rays in adjacent sectors; displacement of each set of measurements according to a displacement vector related to a displacement of each set of measurements of the estimated geometry, if the displacement vector exceeds a selection criterion; iteration of obtaining an estimate of the well hole geometry (2) and the displacement of each set of measurements based on a last displacement vector; and providing a last estimate obtained as the geometry of the borehole (2) when all displacement vectors no longer exceed the selection criterion for displacement.
    公开号:BR112014001707B1
    申请号:R112014001707-7
    申请日:2012-07-26
    公开日:2020-08-18
    发明作者:Jianyong Pei；Thomas Dahl；John MacPherson
    申请人:Baker Hughes Incorporated；
    IPC主号:
    专利说明:

    CROSS REFERENCE TO RELATED ORDERS
    [001] This application claims the benefit of United States Application No. 13/194179, deposited on July 29, 2011, which is hereby incorporated by reference in its entirety. BACKGROUND
    [002] Well holes are drilled deep into the earth for many applications, such as carbon sequestration, geothermal production and hydrocarbon exploration and production. Many different types of sensors can be used to perform measurements while a well bore is being drilled in an operation referred to as profiling -during- drilling (LWD).
    [003] The standoff (distance of separation between a tool and the borehole) of an LWD sensor while one or more measurements are taken is a very important parameter. One of the important applications, for example, is to carry out environmental corrections of LWD sensor measurements, which are sensitive to distance or sensor standoff until formation. Usually, multiple ultrasonic transducers are mounted around the circumference of a downhole assembly (BHA) housing the LWD sensors. Each transducer measures the distance (ie, standoff) from itself to the well hole wall in the direction of the acoustic waves.
    [004] The standoff values can also be used to give the geometry of the well hole. If the borehole is an ideal circle and the center of the borehole drilling assembly below is the center of the borehole, for example, the borehole radius can be calculated by adding the tool radius (from the center to the sensor) and the standoff (from the sensor to the well hole wall. In real drilling situations, however, the center of the well drilling unit below the hole usually moves laterally in the cross section of the well hole due to to the drilling vibrations.The path of its lateral movement cannot be known a priori.As a result, the well hole geometry cannot be obtained directly from the standoffe measurements of the tool diameter. An algorithm, therefore, is necessary to remove the effect introduced by lateral movement from the center of the drilling unit. Typically, traditional methods for this purpose do not deal with arbitrary well hole geometry. For example, some existing algorithms assume that the shape of ge Arbitrary well hole ometry is elliptical, even when it is not. It would be well received in the drilling industry if estimates of arbitrary borehole geometry could be improved. BRIEF SUMMARY
    [005] A method for estimating the geometry of a well hole that penetrates the earth is disclosed. The method includes: making a plurality of well hole measurements with a calibrator with N transducers in a plurality of times, where for each moment a set of measurements comprises measurements made by the N transducers at that moment; dividing a cross section of the well bore into S sectors, the cross section being in an X-Y plane which is perpendicular or subperpendicular to a Z-axis which is a longitudinal axis of the well bore; obtaining an estimate of the geometry of the borehole by connecting sectors adjacent to a representative point of radius that represents a representative radius of measurements in each sector; displacement of each set of measurements according to a displacement vector related to a displacement of each set of measurements of the estimated geometry, if the displacement vector exceeds a selection criterion; iteration of obtaining an estimate of the well hole geometry and the displacement of each set of measurements based on a last displacement vector; and providing that last estimate obtained as the geometry of the well hole when all displacement vectors no longer exceed the selection criterion for displacement.
    [006] An apparatus for estimating the geometry of a borehole that penetrates the earth is also disclosed. The apparatus includes: a conductor configured to be transported through the well hole; a plurality of sensors arranged in the conductor and configured to perform well hole measurements with a calibrator in a plurality of times, where, for each moment in the plurality of times, a set of measurements comprises measurements made by the N transducers at that moment; and a processor. The processor is configured to implement a method that includes: receiving a set of measurements for each moment in the plurality of times; dividing a cross section of the well bore into S sectors, the cross section being in an X-Y plane which is perpendicular or sub-perpendicular to a Z-axis which is a longitudinal axis of the well bore; obtaining an estimate of the geometry of the borehole by connecting sectors adjacent to a representative point of radius that represents a representative radius of measurements in each sector; displacement of each set of measurements according to a displacement vector related to a displacement of each set of measurements of the estimated geometry, if the displacement vector exceeds a selection criterion; iteration of obtaining an estimate of the well hole geometry and the displacement of each set of measurements based on a last displacement vector; and providing that last estimate obtained as the geometry of the well hole when all displacement vectors no longer exceed the selection criterion for displacement.
    [007] A computer-readable non-transitory medium is also disclosed, with instructions executable on a switch for estimating the geometry of a well hole that penetrates the earth by implementing a method. The method includes: receiving a plurality of well hole measurements with calibrator performed with a plurality of sensors in a plurality of times, where, for each moment in the plurality of times, a set of measurements comprises the measurements made by the plurality of sensors at that moment; dividing a cross section of the well bore into S sectors, the cross section being in an X-Y plane which is perpendicular or subperpendicular to a Z-axis which is a longitudinal axis of the well bore; obtaining an estimate of the geometry of the borehole by connecting sectors adjacent to a representative point of radius that represents a representative radius of measurements in each sector; displacement of each set of measurements according to a displacement vector related to a displacement of each set of measurements of the estimated geometry, if the displacement vector exceeds a selection criterion; iteration of obtaining an estimate of the well hole geometry and the displacement of each set of measurements based on a last displacement vector; and providing that last estimate obtained as the geometry of the well hole when all displacement vectors no longer exceed the selection criterion for displacement. BRIEF DESCRIPTION OF THE DRAWINGS
    [008] The following descriptions should not be considered as limiting in any way. With reference to the accompanying drawings, similar elements are numbered similarly: FIGURE 1 illustrates an exemplary embodiment of a downhole assembly (BHA) arranged in a wellhole that penetrates the earth; FIGURE 2 illustrates a configuration of acoustic sensors in the BHA; FIGURE 3 represents aspects of two pentagons derived from measurements as two different moments; FIGURE 4 is a flow chart of a method for estimating well hole geometry from acoustic measurements with a calibrator; FIGURE 5 represents aspects of a well hole geometry; FIGURES 6A and 6B represent aspects of calculating displacement vectors; FIGURES 7a-7i represent aspects of the application of the method with five evenly distributed acoustic transducers and 120 sectors; FIGURE 8 represents aspects of the lateral movement of the BHA; FIGURE 9 represents aspects of the application of the method with five evenly distributed acoustic transducers and 16 sectors; FIGURES 10A and 10B represent aspects of the application of the method with three evenly distributed acoustic transducers and 120 sectors; FIGURES 11A and 11B represent aspects of the application of the method with ten uniformly distributed acoustic transducers and 120 sectors; FIGURES 12A and 12B represent aspects of the application of the method with five evenly distributed acoustic transducers; and FIGURE 13 represents measurement aspects of two calibrators at different depths to measure the penetration rate. DETAILED DESCRIPTION
    [009] A detailed description of one or more modalities of the disclosed apparatus and method presented here by way of example and not limitation with reference to FIGURES.
    [0010] A method and apparatus for accurately estimating arbitrary geometry of a well bore in the earth using well bore standoff measurements are disclosed. In addition, the lateral movement of a well hole standoff measurement tool is also estimated
    [0011] FIGURE 1 illustrates an exemplary embodiment of a drilling column 10 arranged in a well hole 2 that penetrates the earth 3, which includes a geological formation 4. Although well hole 2 is represented as being vertical, the teachings they are also applicable to deviated well holes. A drill column rotation system 5 disposed on the earth surface 3 is configured to rotate the drill column 10 in order to rotate a drill bit 6 disposed at the distal end of the drill column 10. Drill bit 6 represents any cutting device configured to cut through the earth 3 or the rock in formation 4 in order to drill the borehole 2. Adjacent to the drill bit 6 is a downhole assembly (BHA) 7. BHA 7 may include downhole bore components, such as profiling tool 13 configured to perform one or more of several downhole measurements as the drill bit 6 drills down well 2 or during a temporary drilling stop. The term "well bore below" as a descriptor refers to being arranged in well bore 2 as opposed to being arranged outside of well bore 2, such as on or above the surface of the earth 3.
    [0012] Still referring to FIGURE 1, BHA 7 includes N well hole calibrator sensors 8, which can also be referred to as transducers. The term "calibrator" refers to a diameter of the well hole 2. Each calibrator sensor 8 is configured to measure a distance (generally referred to as standoff) from that sensor 8 to a wall of the well hole 2 directly in front of that sensor 8. As the sensors, in general, are arranged along the circumference of BHA 7, the measured distance is adjusted to take into account the displacement of the sensors from the center C of BHA 7. In this way, in one or more modalities, each sensor 8 provides output measurements that are used to determine the distance from the center C of BHA 7 to the well hole wall directly in front of the sensor 8 that performs the measurement. The N sensors 8 can be distributed evenly or unevenly along the perimeter or circumference of BHA 7. In both cases, the orientations (ie azimuth directions) of the sensor measurements are also recorded. In one or more modalities, orientation is obtained using one or more magnetometers that sense the direction of the earth's magnetic field with respect to the face of the tool at the time of measurement. It can be appreciated that, in an alternative embodiment, the N calibrator sensors 8 can be arranged in one of the well hole sensor sub 14 at any location along the drill string 10.
    [0013] In one or more modalities, sensors 8 are ultrasonic acoustic transducers that are configured to emit an acoustic wave and receive a reflection from the wave. By measuring a transit time, as with the well hole electronics 9 below, the distance from the acoustic transducers to the well hole 2 wall in front of the transducer can be measured. It can be appreciated that sensors 8 can also be configured to operate on other principles, such as optical, electrical, magnetic or radiation as non-limiting examples. In general, measurements with a well bore calibrator by N sensors 8 are performed at substantially the same time.
    [0014] Still referring to FIGURE 1, the electronic components 9 of the borehole below are coupled to sensors 8, are used to operate sensors 8 and receive and process measurements from sensors 8. Furthermore, in one or more modalities, the well-hole electronics 9 below can transmit the measurements to a computer processing system 12 arranged on the surface of the earth 3 for processing. A telemetry system 11 can be used to communicate data between the well hole electronic components 9 below and the computer processing system 12. The data can include the well hole geometry determined by an algorithm performed on the electronic components 9 of borehole below, using the sensor measurements or the data may include the sensor measurements, so that the algorithm can be performed by the surface computer processing system 12 to determine the borehole geometry. In one or more modalities, the telemetry system 11 uses wired drill pipe for real-time communication. Other non-limiting modalities of the telemetry system 11 use pulses in the mud, electromagnetic energy or acoustic energy for signal transmission.
    [0015] Now, reference can be made to FIGURE 2, which represents aspects of the well bore measurement calibrator. In the mode of FIGURE 2, there are five (N = 5) acoustic transducers) 8 evenly distributed (for example, 72 ° spacing, labeled Ti - T5. Ultrasonic transducers 8 obtain data to calculate their distances (ie, standoff) to the well hole wall by measuring the bidirectional transit time of the emitted acoustic wave. Assuming that the acoustic wave from the Ti transducer reaches the well hole wall at point Pi and the measured travel time is ti, the distance from T / a P / é: di = Vm (ti Z2) where Vmé is the acoustic speed in the drilling mud under well-hole conditions below (ie temperature, pressure, components, for example) .The distance from the center of BHA 7 until the well hole wall in the direction of the Ti transducer is therefore (di + R), where R is the radius of BHA 7.
    [0016] At each measurement moment, all transducers are triggered substantially at the same time. For the configuration shown in FIGURE 2, ad distances of five points in the well hole wall (Pi ~ Ps) to the center C of BHA 7 are obtained. In other words, the location of a pentagon P1P2P3P4P5 (ie, five-sided polygon in relation to center C of BHA 7 is obtained. The N calibrator measurements made at substantially the same time by the N sensors 8 are referred to here as a set Measurement sets, Measurement sets are taken at a high frequency in relation to the longitudinal movement of BHA 7. Therefore, over time, many points around the same borehole cross section are measured, as shown in FIGURE 3. A FIGURE 3 also illustrates two sets of measurements shown as two pentagons (31 and 32).
    [0017] The algorithm (40) used to estimate the geometry of well 2 hole, using N sensor 8 calibrator measurements is now discussed in detail with reference to FIGURE 4. Step 41 requires positioning (for example, plotting ) of all points measured with the origin of the coordinate system at center C of BHA 7, using the sensor measurements and their orientations. All measured points are obtained from all measurement sets where each measurement set includes N measurements made by N sensors 8 substantially at the same time.
    [0018] Step 42 requires obtaining a first estimate or approximation of the well hole geometry. The first approximation is obtained by dividing the measured cross section (X - Y plane, which is perpendicular or subperpendicular to the longitudinal axis of the well hole) of the well hole in S sectors, as shown in FIGURE 5. The larger is S, the greater the resolution of the well hole geometry. There are a number of points that fall in each sector. The radius of each measured point is its distance from the origin. Within each sector, a ray histogram can be created, which includes a number of points having a ray that falls in a ray range. A representative radius is then calculated for that sector, based on the radius histogram. The representative radius is defined as a ray in the ray range having the highest density or number of points. Several algorithms can be used to obtain the representative radius. A representative radius point based on the representative radius is usually plotted at the center of the sector, but it does not have to be. Adjacent representative radius points are then connected to obtain a tight curve. This closed curve is the first approximation of the true well hole geometry.
    [0019] Step 43 requires the calculation of displacement vectors for each set of measurements and the displacement of the set of measurements, if the sum of the displacement vectors exceeds a selected criterion. For each N-sided polygon (representing a set of measurements) whose vertices are N measured points (illustrated by Pi ~ Ps, in FIGURE 6A), straight lines are drawn from the origin to all their vertices. These straight lines intersect with the approximate well hole geometry obtained from Step 42. For each vertex, a displacement vector is defined as the vector of the vertex to the intersection (illustrated by di ~ ds, in FIGURE 6). For each polygon, a sum of vectors D of the displacement vectors is obtained, where D =, as illustrated in FIGURE 6B. The sum of D vectors is defined as the total displacement vector for its associated polygon. The total displacement distance D for the associated polygon is then defined as the length of vector D.
    [0020] Once the displacement vectors and total displacement distances are calculated for all polygons, it is decided which of the polygons will be corrected to reduce the dispersion of the measurement points (Step 44). Various criteria can be used to select the polygons or measurement sets to be corrected. In one or more modalities, only those polygons whose displacement distances are greater than the average displacement distance of all polygons are corrected.
    [0021] For all the polygons that will be corrected, the polygons (that is, all of their vertices) are moved or displaced in the direction of the sum of vectors D to a distance of D / (N-1). In other words, the actual movement of the polygon is described mathematically as δ = D / (N-1) where δ is the displacement vector of the polygon or set of measurements. The vertices of the corrected polygons are updated based on the displacement vector and a second approximation or estimate of the hole geometry is created as in step 42, but using the vertices (that is, the measurement points) of the corrected polygons and the vertices of the hole. any of the uncorrected polygons.
    [0022] In this way, steps 42 and 43 can be iterated (Step 45) using a last displacement vector obtained until the total displacement distances or the displacement vectors satisfy a selection criterion for moving the polygons. If the dispersion is small enough in step 44, then the last estimate obtained for the well hole geometry comes out as the well hole geometry.
    [0023] In step 46, the lateral movement of BHA 7 and the trajectory of center C of BHA 7 are calculated. For each polygon, the accumulated motion vector is obtained by adding its real motion vectors from all iterations (A / iteration = total number of iterations), where

    [0024] If the beginning of Σ6 is at the origin, then the end of the sum shows the location of the center of BHA 7 at the time of the measurement represented by that polygon. The path of the center of BHA 7 is obtained by connecting the ends of the accumulated motion vectors, in the order of the measurement times with the starting points of the vectors being at the origin.
    [0025] An example of an application of the algorithm is now provided using the measurements shown in FIG. 3. The number of sectors used in this example is S = 120. The updated location of the measured points and the approximate hole geometry after each iteration are shown in FIG. 7. After the ninth iteration, the very irregular geometry of the well hole is very well captured.
    [0026] FIGURE 8 depicts aspects of the lateral movement derived (80) from the example in FIGURE 7. FIGURE 8 also illustrates the actual movement (81) of BHA 7 from which measurements were made. Only fifty steps of time (ie fifty measurement sets) are shown so that the figures are not overloaded. The derived movement is very close to the real movement.
    [0027] FIGURE 9 illustrates an application of the algorithm applied for the same measurements shown in figure 3 with five transducers equally distributed, but with the number of sectors S = 16. At the end of the nine iterations as shown in FIGURE 9, the geometry of the well bore is recovered, but with a coarser geometry than when S = 120.
    [0028] The algorithm can handle any number of transducers 8 in BHA 7. FIGURE 10 shows its application for three evenly distributed transducers, while FIGURE 11 shows its application for ten evenly distributed transducers. FIGURES 10A and 11A show the well hole geometry and the transducer assembly, while FIGURES 10B and 11B show the derived well hole geometry. In general, the more transducers there are, the more points measured, and the better the derived borehole geometry.
    [0029] The algorithm is very flexible, such that it can be applied to non-regular transducer arrangements. FIGURE 12 illustrates an example where five transducers 8 are unevenly distributed over the circumference of BHA 7.
    [0030] Due to the high resolution of the algorithm it can be used to measure the penetration rate (ROP) of the drill bit 6. To measure ROP, BHA 7 requires at least two sets of transducers 8. As illustrated in FIGURE 13, one first set of transducers 131 is spaced a distance L from a second set of transducers 132. With the first set of transducers 131 closer to the drill bit 6, a time T is measured, which leads to the second set of transducers 132 to measure the same borehole geometry as the first set of 131 transducers. The ROP is then calculated as ROP = LT. The more frequent the variations of the well hole geometry with depth, the more accurate the ROP calculation will be.
    [0031] The apparatus and method described have several advantages. An advantage over the prior art algorithms is that the present algorithm can estimate the precise geometry of the well hole and not assume that the shape of the well hole is elliptical. Another advantage is that, due to the flexibility of the algorithm, it can still be applied in cases where one or more transducers fail, but still have a plurality of working transducers. Another advantage is that the algorithm is suitable for borehole applications below. Due to the limited space in the BHA, the processing power of the processors may be limited, but the algorithm can still be executed by those processors. The algorithm is simple and does not involve advanced mathematical methods or large-scale computations. Yet another advantage is that the resolution of the estimated well hole geometry can be specified by selecting an appropriate criterion for the movement or displacement of the polygons. Therefore, lower resolution estimates, which may be appropriate in certain applications, can be performed in a shorter time than higher resolution estimates. Yet another advantage is that the algorithm applies to any type of sensor that can measure the well hole calibrator or standoff below.
    [0032] In support of the present teachings present, several components of analysis can be used, including a digital and / or an analog system. For example, sensors 8, downhole well electronics 9 or surface computer processing 12 may include the digital and / or analog system. The system may have components such as a processor, a storage medium, memory, input, output, communication link (wired, wireless, pulsed mud, optical or other), user interfaces, software programs, signal processors ( digital or analog) and other such components (such as resistors, capacitors, inductors and others) to provide operation and analysis of the apparatus and methods disclosed herein in any of several ways well appreciated in the art. It is considered that these teachings can be, but need not be, implemented in conjunction with a set of executable instructions on a computer, stored in a computer-readable medium, including memory (ROMs, RAMs), optical (CD-ROMS) or magnetic ( disks, hard disks) or any other type that, when executed, makes a computer implement the method of the present invention. These instructions can provide equipment operation, control, data collection and analysis and other functions considered relevant by a system designer, owner, user or other such person, in addition to the functions described in this exhibition.
    [0033] Still, several other components can be included and required to provide aspects of the present teachings. For example, a power supply (for example, at least one of a generator, a remote supply and a battery), cooling component, heating components, magnet, electromagnet, sensor, electrode, transmitter, receiver, transceiver, antenna, controller, optical unit, electrical unit or electromechanical unit can be included in support of the various aspects discussed here or in support of functions other than this exhibition.
    [0034] The term "conductor", as used herein, means any device, device component, combination of devices, means and / or element that can be used to transport, house, support or otherwise facilitate the use of another device , device components, combination of devices, means and / or element. Other exemplary non-limiting conductors include spiral drill pipe, joined pipe drill columns and any of their combinations or portions. Other conductor examples include casing tubes, electrical profiling cables, probes with electrical profiling cables, probes with smooth cables, drop shots, downhole assemblies, drill string inserts, modules, internal housings and their substrate portions .
    [0035] Elements of the modalities were introduced with the articles "one" or "ones", The articles are intended to mean one or more elements. The terms "including" and "having" are intended to be inclusive so that there may be many additional elements other than related elements. The conjunction "or", when used with a relationship of at least two terms, is intended to mean any term or combination of terms. The terms "first" and "second" are used to distinguish elements and are not used to denote a particular order. The term "coupling" refers to the coupling of a first component to a second component directly or indirectly through an intermediate component.
    [0036] It will be recognized that the various components or technologies can provide certain necessary or beneficial functionality or resources. Consequently, these functions and resources, as may be necessary in support of the appended claims and their variations, are recognized as being inherently included as a part of the teachings presented herein and a part of the disclosed invention.
    [0037] Although the invention has been described with reference to the exemplary modalities, it will be understood that several changes can be made and equivalents replaced by its elements, without departing from the scope of the invention. In addition, many modifications will be appreciated to adapt a particular instrument, situation or material to the teachings of the invention, without departing from its essential scope. Therefore, it is intended that the invention is not limited to the particular modality disclosed as the best mode considered for carrying out the present invention, but that the invention will include all modalities that are within the scope of the appended claims.
    权利要求:
    Claims (10)
    [0001]
    1. Method for estimating the geometry of a well hole (2) that penetrates the earth (3), the method characterized by comprising: - making a plurality of measurements with well hole calibrator (2) with N transducers (8 ) in a plurality of times, in which for each moment a set of measurements comprises measurements made by the N transducers (8) at that moment; - division of a cross section of the well hole (2) in S sectors, the cross section being in an X - Y plane that is perpendicular or subperpendicular to a Z axis that is a longitudinal axis of the well hole (2); - obtaining an estimate of the geometry of the borehole (2) through the connection in adjacent sectors of a point of representative rays that represents a representative ray of measurements in each sector; - displacement of each set of measurements according to a displacement vector related to a displacement of each set of measurements of the estimated geometry, if the displacement vector exceeds a selection criterion; - iteration of obtaining an estimate of the well hole geometry (2) and the displacement of each set of measurements based on a last displacement vector; and - providing a last estimate obtained as the geometry of the borehole (2) when all displacement vectors no longer exceed the selection criterion for displacement.
    [0002]
    2. Method, according to claim 1, characterized by the fact that the N transducers (8) are arranged in a perimeter of a well-bottom assembly (7) or well-hole sensor (14) below configured to be conducted through the borehole (2), a center C of the perimeter being a reference point from which the borehole measurements (2) with calibrator are referenced.
    [0003]
    3. Method according to claim 2, characterized by the fact that the shaft bottom assembly (7) has a circular cross section in the X - Y plane and the perimeter is a circumference of the shaft bottom assembly (7) .
    [0004]
    4. Method, according to claim 3, characterized by the fact that a radius r for each measurement is calculated by adding a distance from the center C and a standoff measured by one of the N transducers (8) that perform the measurement.
    [0005]
    5. Method, according to claim 2, characterized by the fact that the displacement comprises: - creation of a N-sided polygon for each set of measurements in which each vertex represents a measurement; - creation of a straight line from the center C through each vertex where the line intersects the first estimate of the well hole geometry (2); - determination of a displacement vector di for each vertex, the displacement vector comprising a distance and a direction along the straight line until the intersection of the first estimate of the well hole geometry (2); - sum of the displacement vectors di for each polygon to obtain a sum of vector D, where D =. í = i
    [0006]
    6. Method, according to claim 5, characterized by the fact that the displacement still comprises the movement of each polygon that exceeds the selection criterion of a distance δ where δ = D / (N-1) in the direction of D.
    [0007]
    7. Method, according to claim 1, characterized by the fact that it still comprises the determination of an average displacement of the first displacement vectors and the establishment of selection criteria for the average displacement.
    [0008]
    8. Method according to claim 1, characterized by the fact that N transducers (8) comprise a first set of sensors (131) spaced a distance L from a second set of sensors (132) along a longitudinal axis of the well bore (2) and the method also comprises estimating a penetration rate (ROP) of the first and second sets of sensors (131, 132) in the well bore (2) by dividing L for a while T that leads to the second set of sensors (132) to measure the same geometry of a borehole (2) as the first set of sensors (131) where ROP = L / T.
    [0009]
    9. Apparatus for estimating a well-hole geometry (2) that penetrates the earth (3), the apparatus characterized by comprising: - a conductor (10) configured to be transported through the well-hole (2); - a plurality of sensors (8) arranged in the conductor (10) and configured to carry out well hole measurements (2) with a calibrator in a plurality of times, in which, for each moment in the plurality of times, a set of measurements comprises measurements made by the plurality of sensors (8) at that moment; and - a processor (12) configured to implement a method comprising: - receiving a set of measurements for each moment in the plurality of times; - dividing a cross section of the well hole (2) into S sectors, the cross section being in an X-Y plane that is perpendicular or subperpendicular to a Z axis that is a longitudinal axis of the well hole (2); - obtaining an estimate of the geometry of the borehole (2) through the connection in sectors adjacent to a representative radius point that represents a representative radius of measurements in each sector; - displacement of each set of measurements according to a displacement vector related to a displacement of each set of measurements of the estimated geometry, if the displacement vector exceeds a selection criterion; - iteration of obtaining an estimate of the well hole geometry (2) and the displacement of each set of measurements based on a last displacement vector; and - providing this last estimate obtained as the geometry of the well hole (2) when all the displacement vectors no longer exceed the selection criterion for displacement.
    [0010]
    10. Apparatus according to claim 9, characterized by the fact that the conductor (10) comprises a downhole assembly (7) (BHA)
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    同族专利:
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    法律状态:
    2018-12-11| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-10-29| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-05-26| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-08-18| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 26/07/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US13/194,179|US8788207B2|2011-07-29|2011-07-29|Precise borehole geometry and BHA lateral motion based on real time caliper measurements|
    US13/194,179|2011-07-29|
    PCT/US2012/048330|WO2013019553A2|2011-07-29|2012-07-26|Precise borehole geometry and bha lateral motion based on real time caliper measurements|
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