CN113236124B - Deep shale gas horizontal well geological guiding method - Google Patents
Deep shale gas horizontal well geological guiding method Download PDFInfo
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Abstract
The application provides a deep shale gas horizontal well geological guiding method, and relates to the technical field of oil and gas drilling. The method comprises the steps of comparing and fitting a real drilling well logging curve of a current well in a landing stage with a well logging curve of a marker well in the landing stage so as to calibrate the position of a stratum where a drilling tool is located; after the current drilling well is in the horizontal guiding stage, fitting a logging curve of the current drilling well in the horizontal guiding stage with a logging curve simulated by guiding software to determine the apparent inclination angle of the current section of the drilled stratum, determining the attitude of the next section of the drilled stratum according to the apparent inclination angle of the current section of the drilled stratum, and adjusting the drilling direction of the drilling tool according to the attitude of the next section of the drilled stratum; and performing curve form lag analysis on the directional well logging while drilling curve, the upper well logging curve and the lower well logging curve of the current well drilling so as to adjust the track of the drilling tool according to the analysis result. The method provided by the application can optimize the track in real time and improve the drilling rate of the high-quality reservoir, so that the single well yield is improved.
Description
Technical Field
The application relates to the technical field of oil and gas drilling, in particular to a deep shale gas horizontal well geological guiding method.
Background
In the field of oil and gas drilling, the geosteering technology is mainly used for guiding the direction of a drilling track and adjusting a well track to the optimal position of an oil and gas reservoir so as to achieve the optimal oil (gas) production or water injection effect.
With the wide application of horizontal well geosteering technology, in order to pursue higher single well yield, the length of a horizontal well horizontal segment is designed to be longer and longer, however, in the geosteering process, the traditional geosteering method cannot accurately place a well track at the optimal position of an oil and gas reservoir, the drilling rate of a high-quality reservoir is lost, and the single well yield is reduced.
Therefore, how to provide an effective solution to ensure the drilling rate of a good-quality reservoir has become an urgent problem in the prior art.
Disclosure of Invention
The embodiment of the application provides a deep shale gas horizontal well geosteering method, which is used for solving the problem that the drilling rate of a high-quality reservoir is low in the drilling process in the prior art.
The embodiment of the application adopts the following technical scheme:
in a first aspect, an embodiment of the present application provides a deep shale gas horizontal well geosteering method, including:
comparing and fitting a real drilling well logging curve of a current drilling well in a landing stage with a well logging curve of a marking well in the landing stage to calibrate the position of the stratum where the drilling tool is located so as to perform guiding landing control on a drilling track according to the position of the stratum where the drilling tool is located, wherein the marking well is a completed drilling well which is adjacent to the current drilling well;
after the current drilling well is in the horizontal guiding stage, fitting a logging curve of the current drilling well in the horizontal guiding stage with a simulated logging curve to determine an apparent inclination angle of the current section of the drilled stratum, determining the attitude of the next section of the drilled stratum according to the apparent inclination angle of the current section of the drilled stratum, adjusting the drilling direction of the drilling tool according to the attitude of the next section of the drilled stratum, wherein the simulated logging curve is determined according to the logging curve of the marking well in the horizontal guiding stage;
and performing curve form lag analysis on the upper logging curve and the lower logging curve of the current well drilling so as to adjust the well drilling track according to the analysis result.
In one possible design, the method further includes:
determining whether a fault exists in front of the drilling tool according to the seismic slice;
the method for fitting the logging curve of the current drilling well in the horizontal steering stage with the simulated logging curve to determine the apparent dip angle of the current section of the drilled stratum and determining the attitude of the next section of the stratum to be drilled according to the apparent dip angle of the current section of the drilled stratum comprises the following steps:
and if no fault exists in front of the drilling tool, fitting the logging curve of the current drilling well in the horizontal steering stage with the simulated logging curve to determine the apparent inclination angle of the current section of the drilled stratum, and determining the attitude of the next section of the stratum to be drilled according to the apparent inclination angle of the current section of the drilled stratum.
In one possible design, the method further includes:
if a fault exists in front of the drilling tool, the drilling track is adjusted according to the type of the fault, so that the drilling tool drills in the direction of the target layer after crossing the fault.
In one possible design, the adjusting the drilling trajectory according to the fault type includes:
if the fault type is a reverse fault, adjusting a cutting stratum on the drilling track to cross the fault;
and if the fault type is a positive fault, adjusting the drilling track to undercut the stratum and cross the fault.
In one possible design, before determining whether a fault exists in front of the drilling tool from the seismic slice, the method further comprises:
and acquiring the seismic slice through the three-dimensional seismic data volume.
In one possible design, after the real drilling log of the current drilling well in the landing stage and the log of the marker well in the landing stage are fitted in comparison to calibrate the position of the stratum where the drilling tool is located, the method further comprises:
if the drilling tool passes through the landing mark layer, calculating the apparent inclination angle of the landing section in the landing layer according to the thickness of the current stratum when the drilling tool enters a new stratum each time; and
adjusting the well inclination angle of the drilling tool according to the visual inclination angle of the landing section and the vertical thickness of the current distance to the target point until the drilling tool reaches the target point;
wherein, the landing mark layer is a layer of stratum above the landing layer.
In one possible design, before the real drilling log of the current drilling well in the landing stage and the log of the marker well in the landing stage are fitted to calibrate the position of the stratum where the drilling tool is located, the method further comprises:
estimating the vertical depth of the current drilling target point;
the vertical depth of the target entry point of the current drilling well is X1 ═ Y1-Y2+ X2+ Z, wherein Y1 is the vertical depth of the target entry point of the marker well, Y2 is the filling elevation of the marker well, X2 is the filling elevation of the current drilling well, and Z is the depth difference between the current drilling well and the marker well.
In a second aspect, an embodiment of the present application provides a deep shale gas horizontal well geosteering device, including:
the calibration unit is used for comparing and fitting a real drilling well logging curve of a current drilling well in a landing stage with a well logging curve of a marking well in the landing stage so as to calibrate the position of the stratum where the drilling tool is located, so that the drilling track is guided and landed according to the position of the stratum where the drilling tool is located, and the marking well is a drilling well which is adjacent to the current drilling well and is completed;
the determining unit is used for fitting the logging curve of the current drilling well in the horizontal guiding stage with the simulated logging curve to determine the apparent inclination angle of the current section of the drilled stratum after the current drilling well is in the horizontal guiding stage, determining the attitude of the next section of the drilled stratum according to the apparent inclination angle of the current section of the drilled stratum, adjusting the drilling direction of the drilling tool according to the attitude of the next section of the drilled stratum, and determining the simulated logging curve according to the logging curve of the marked well in the horizontal guiding stage;
and the hysteresis analysis unit is used for performing curve form hysteresis analysis on the upper logging curve and the lower logging curve of the current drilling well so as to adjust the drilling well track according to the analysis result.
In a third aspect, an embodiment of the present application provides an electronic device, including a processor, a communication interface, a memory, and a communication bus, where the processor, the communication interface, and the memory complete mutual communication through the bus;
a memory for storing a computer program;
the processor is used for executing the program stored in the memory and realizing the following processes:
comparing and fitting a real drilling well logging curve of a current drilling well in a landing stage with a well logging curve of a marking well in the landing stage to calibrate the position of the stratum where the drilling tool is located so as to perform guiding landing control on a drilling track according to the position of the stratum where the drilling tool is located, wherein the marking well is a completed drilling well which is adjacent to the current drilling well;
after the current drilling well is in the horizontal guiding stage, fitting a logging curve of the current drilling well in the horizontal guiding stage with a simulated logging curve to determine an apparent inclination angle of the current section of the drilled stratum, determining the attitude of the next section of the drilled stratum according to the apparent inclination angle of the current section of the drilled stratum, adjusting the drilling direction of the drilling tool according to the attitude of the next section of the drilled stratum, wherein the simulated logging curve is determined according to the logging curve of the marking well in the horizontal guiding stage;
and performing curve form lag analysis on the upper logging curve and the lower logging curve of the current well drilling so as to adjust the well drilling track according to the analysis result.
In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, in which a computer program is stored, and when executed by a processor, the computer program implements the following procedures:
comparing and fitting a real drilling well logging curve of a current drilling well in a landing stage with a well logging curve of a marking well in the landing stage to calibrate the position of the stratum where the drilling tool is located so as to perform guiding landing control on a drilling track according to the position of the stratum where the drilling tool is located, wherein the marking well is a completed drilling well which is adjacent to the current drilling well;
after the current drilling well is in the horizontal guiding stage, fitting a logging curve of the current drilling well in the horizontal guiding stage with a simulated logging curve to determine an apparent inclination angle of the current section of the drilled stratum, determining the attitude of the next section of the drilled stratum according to the apparent inclination angle of the current section of the drilled stratum, adjusting the drilling direction of the drilling tool according to the attitude of the next section of the drilled stratum, wherein the simulated logging curve is determined according to the logging curve of the marking well in the horizontal guiding stage;
and performing curve form lag analysis on the upper logging curve and the lower logging curve of the current well drilling so as to adjust the well drilling track according to the analysis result.
The above-mentioned at least one technical scheme that this application one or more embodiments adopted can reach following beneficial effect:
the logging curve of the current drilling well in the landing stage and the logging curve of the marking well in the landing stage are subjected to curve fitting so as to calibrate the stratum position where the drilling tool is located; after the current drilling well is in the horizontal guiding stage, fitting a logging curve of the current drilling well in the horizontal guiding stage with the simulated logging curve to determine the apparent inclination angle of the current section of the drilled stratum, determining the attitude of the next section of the drilled stratum according to the apparent inclination angle of the current section of the drilled stratum, and planning the drilling direction of the drilling tool according to the attitude of the next section of the drilled stratum; and then performing curve form lag analysis on the upper logging curve and the lower logging curve of the current well drilling so as to adjust the well drilling track according to the analysis result. Therefore, the trajectory can be optimized in real time, accurate guiding is realized, the engineering implementation difficulty is reduced, the drilling rate of a high-quality reservoir and the drilling trajectory are ensured to be smooth, and the single-well yield and the investment return of drilling investors are improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure in any way. In the drawings:
fig. 1 is a schematic flow chart of a deep shale gas horizontal well geosteering method according to an embodiment of the present disclosure.
FIG. 2 is a schematic view of a drilling trajectory when the fault type is a reverse fault, according to an embodiment of the present application.
Fig. 3 is a schematic diagram of a drilling trajectory when the fault type is a normal fault according to an embodiment of the present application.
Fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
FIG. 5 is a schematic structural diagram of a deep shale gas horizontal well geosteering device according to one embodiment of the present application.
Detailed Description
In order to solve the problem that the drilling rate of a high-quality reservoir is low in the drilling process in the prior art, the embodiment of the application provides the deep shale gas horizontal well geosteering method, and the deep shale gas horizontal well geosteering method can ensure the drilling rate of the high-quality reservoir and improve the single-well yield and the investment return of drilling investors.
The deep shale gas horizontal well geosteering method provided by the embodiment of the application can be applied to a user terminal, and the user terminal can be, but is not limited to, a personal computer, a smart phone, a tablet computer, a laptop portable computer, a personal digital assistant and the like.
For convenience of description, the embodiments of the present application are described with a user terminal as an execution subject unless otherwise specified.
It is to be understood that the described execution body does not constitute a limitation of the embodiments of the present application.
Referring to fig. 1, in a first aspect, the present application provides a deep shale gas horizontal well geosteering method, which may include the following steps:
and S101, comparing and fitting the actual drilling well logging curve of the current drilling well in the landing stage with the well logging curve of the marker well in the landing stage so as to calibrate the stratum position of the drilling tool.
Wherein the marker well is a completed well adjacent to the current well. The well log can be, but is not limited to, a gamma curve, a resistivity curve, an acoustic curve, etc., and the well log in the embodiment of the present application adopts a gamma curve because the gamma curve is more obvious.
In the embodiment of the present application, the landing phase may refer to a phase in which a drilling tool reaches a target zone from a wellhead during drilling, and the target zone may refer to a formation containing a conventional and unconventional hydrocarbon reservoir and needing to be drilled in a horizontal direction.
The logging curves corresponding to different stratums have certain difference, the marking well is a finished drilling well, and the logging curve is known, so that the logging curve of the current drilling well in the landing stage and the logging curve of the marking well in the landing stage can be compared and fitted to calibrate the stratum position of the drilling tool, and the drilling track can be guided and landed according to the stratum position of the drilling tool.
Furthermore, before the actual drilling well logging curve of the current drilling well in the landing stage and the well logging curve of the marker well in the landing stage are compared and fitted to calibrate the stratum position of the drilling tool, the target entering point vertical depth of the current drilling well can be estimated, so that the drilling work can be guided in an auxiliary mode according to the estimated target entering point vertical depth.
The target entry point vertical depth of the current well can be expressed as X1 ═ Y1-Y2+ X2+ Z. Wherein Y1 is the vertical depth of the target entering point of the marked well, Y2 is the filling elevation of the marked well, X2 is the filling elevation of the current drilled well, and Z is the depth difference between the current drilled well and the marked well.
The depth difference between the current drilling well and the marker well can be obtained according to seismic slices, the seismic slices can be obtained through three-dimensional seismic data volume processing in advance, and specific description is not given in the embodiment of the application.
In the embodiment of the application, the guiding landing control of the drilling track according to the stratum position of the drilling tool can comprise the following steps:
step S1011, if the drilling tool passes through the landing mark layer, calculating the apparent inclination angle of the landing section in the landing layer according to the thickness of the current stratum when the drilling tool enters a new stratum each time.
And S1021, adjusting the inclination angle of the drilling tool according to the visual inclination angle of the landing section and the vertical thickness of the current distance target entering point until the drilling tool reaches the target entering point.
Wherein, the landing mark layer is one of the stratums above the landing layer (i.e. the destination layer). For example, the landing indicator layer may be a layer 4 or 5 formation above the landing layer.
If the drilling tool passes through the landing mark layer, the apparent inclination angle of the landing section in the landing layer can be calculated according to the thickness of the current stratum when the drilling tool enters a new stratum each time, and then the inclination angle of the drilling tool is adjusted according to the apparent inclination angle of the landing section and the vertical thickness of the current distance to the target entry point until the drilling tool reaches the target entry point (the point of shifting from the landing stage to the horizontal guiding stage). During the period, the inclination angle of the drilling tool is adjusted every time the drilling tool enters a new stratum, so that the drilling tool can be accurately controlled to reach a target entering point, and smooth transition is formed in the target entering process.
The principle of guided landing control of the drilling trajectory is prior art and will not be described in further detail here.
And S102, after the current drilling well is in the horizontal guiding stage, fitting the logging curve of the current drilling well in the horizontal guiding stage with the simulated logging curve to determine the apparent inclination angle of the current section of the drilled stratum, determining the attitude of the next section of the drilled stratum according to the apparent inclination angle of the current section of the drilled stratum, and adjusting the drilling direction of the drilling tool according to the attitude of the next section of the drilled stratum.
Wherein the simulated well log is determined according to the well log of the marked well in the horizontal guiding stage.
In the embodiment of the application, because the marker well is adjacent to the current drilled well, the apparent dip angle of the stratum of the marker well in the horizontal steering stage and the apparent dip angle of the stratum of the marker well in the horizontal steering stage have higher similarity. Based on this, in the embodiment of the application, a logging curve is simulated in advance through a geosteering software according to the logging curve of the marker well in the horizontal guiding stage, and the simulated logging curve is the logging curve inverted by the marker well in the horizontal guiding stage. After the logging curve is simulated, the logging curve of the current drilling well in the horizontal guiding stage can be input into the geosteering software, so that the logging curve of the current drilling well in the horizontal guiding stage is fitted with the simulated logging curve to determine the apparent inclination angle of the current section of the drilled stratum, then the attitude of the next section of the drilled stratum is determined according to the apparent inclination angle of the current section of the drilled stratum, and the drilling direction of the drilling tool is adjusted according to the attitude of the next section of the drilled stratum.
In the embodiment of the application, the logging curve of the current drilling well in the horizontal steering stage is fitted with the simulated logging curve through the Geosteering software to determine the apparent dip angle of the drilled stratum in the current stage, and the method can be realized through the Geosteering software such as StarSteer and Geosteering.
And S103, performing curve form lag analysis on the upper logging curve and the lower logging curve of the current well drilling to adjust the well drilling track according to the analysis result.
The drilling tool is in a ceaseless rotation state in the drilling process, so that an upper logging curve and a lower logging curve can be divided according to directions by the obtained logging curve, hysteresis analysis of curve forms can be carried out on the upper logging curve and the lower logging curve of the current drilling well in the horizontal guiding stage process, and then the drilling track (namely the drilling tool inclination angle) is adjusted according to the analysis result so that the drilling tool is positioned at the optimal position of a target layer in real time, accurate guiding of the drilling tool is realized, the drilling rate of a high-quality reservoir layer is ensured, and the single well yield and the investment return of drilling investors are improved.
Specifically, if the result of the curve form lag analysis is that the log is lagging, the drilling tool is cutting the target zone, and the drilling tool is properly adjusted to increase the slope to drill along the zone. If the result of the curve form lag analysis is that the lower log curve lags, indicating that the formation of interest is cut on the drilling tool, the drilling tool may be suitably adjusted to drill down the formation. The adjustment of the inclination angle of the drilling tool can be automatically adjusted by the user terminal according to the analysis result or manually adjusted by the user according to the analysis result displayed by the user terminal.
The geosteering method provided by the embodiment of the application calibrates the stratum position of a drilling tool by comparing and fitting the logging curve of the current drilling well in the landing stage with the logging curve of the marker well in the landing stage; after the current drilling well is in the horizontal guiding stage, fitting a logging curve of the current drilling well in the horizontal guiding stage with the simulated logging curve to determine the apparent inclination angle of the current section of the drilled stratum, determining the attitude of the next section of the drilled stratum according to the apparent inclination angle of the current section of the drilled stratum, and planning the drilling direction of the drilling tool according to the attitude of the next section of the drilled stratum; and then performing curve form lag analysis on the upper logging curve and the lower logging curve of the current well drilling so as to adjust the well drilling track according to the analysis result. Therefore, the trajectory can be optimized in real time, accurate guiding is realized, the engineering implementation difficulty is reduced, the drilling rate of a high-quality reservoir and the drilling trajectory are ensured to be smooth, oil and gas operators are helped to realize the aim of well drilling smoothly, and the single-well yield and the investment return of drilling investors are improved.
On the basis of the deep shale gas horizontal well geosteering method in the first aspect, the present application further provides a possible design for considering the deep shale gas horizontal well geosteering in a fault situation, including but not limited to the following steps S201-S203.
Step S201, determining whether a fault exists in front of the drilling tool according to the seismic slice, if so, executing step S202, otherwise, executing step S203.
And S202, adjusting the drilling track according to the fault type so that the drilling tool drills in the direction towards the target layer after crossing the fault.
Specifically, as shown in fig. 2, if the fault type is a reverse fault, the drill tilt-up is adjusted. If the fault type is a normal fault, the drill is adjusted to be declined, as shown in fig. 3. Therefore, the drilling tool can drill towards the direction of a target layer after crossing a fault, and the drilling rate and the drilling track of a high-quality reservoir are ensured to be smooth.
And S203, fitting the logging curve of the current drilling well in the horizontal steering stage with the simulated logging curve to determine the apparent dip angle of the current section of the drilled stratum, and determining the attitude of the next section of the stratum to be drilled according to the apparent dip angle of the current section of the drilled stratum.
Therefore, through the possible design I, the drilling track can be adjusted according to the fault type when the fault is encountered, so that the drilling tool drills towards the direction of a target layer after crossing the fault, and the drilling rate and the drilling track of a high-quality reservoir are ensured to be smooth
Fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present application. Referring to fig. 4, at a hardware level, the electronic device includes a processor, and optionally further includes an internal bus, a network interface, and a memory. The Memory may include a Memory, such as a Random-Access Memory (RAM), and may further include a non-volatile Memory, such as at least 1 disk Memory. Of course, the electronic device may also include hardware required for other services.
The processor, the network interface, and the memory may be connected to each other via an internal bus, which may be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, an EISA (Extended Industry Standard Architecture) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 4, but that does not indicate only one bus or one type of bus.
And the memory is used for storing programs. In particular, the program may include program code comprising computer operating instructions. The memory may include both memory and non-volatile storage and provides instructions and data to the processor.
The processor reads a corresponding computer program from the nonvolatile memory into the memory and then runs to form the deep shale gas horizontal well geosteering device on a logic level. The processor is used for executing the program stored in the memory and is specifically used for executing the following operations:
comparing and fitting a real drilling well logging curve of a current drilling well in a landing stage with a well logging curve of a marking well in the landing stage to calibrate the position of the stratum where the drilling tool is located so as to perform guiding landing control on a drilling track according to the position of the stratum where the drilling tool is located, wherein the marking well is a completed drilling well which is adjacent to the current drilling well;
after the current drilling well is in the horizontal guiding stage, fitting a logging curve of the current drilling well in the horizontal guiding stage with a simulated logging curve to determine an apparent inclination angle of the current section of the drilled stratum, determining the attitude of the next section of the drilled stratum according to the apparent inclination angle of the current section of the drilled stratum, adjusting the drilling direction of the drilling tool according to the attitude of the next section of the drilled stratum, wherein the simulated logging curve is determined according to the logging curve of the marking well in the horizontal guiding stage;
and performing curve form lag analysis on the upper logging curve and the lower logging curve of the current well drilling so as to adjust the well drilling track according to the analysis result.
The method performed by the deep shale gas horizontal well geosteering device disclosed in the embodiment of fig. 4 of the present application may be implemented in or by a processor. The processor may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The Processor may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but also Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components. The various methods, steps and logic blocks disclosed in one or more embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with one or more embodiments of the present application may be embodied directly in the hardware decoding processor, or in a combination of the hardware and software modules included in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.
The electronic device may also perform the method of fig. 1, and implement the functions of the deep shale gas horizontal well geosteering device in the embodiment shown in fig. 4, which are not described herein again in this application.
Of course, besides the software implementation, the electronic device of the present application does not exclude other implementations, such as a logic device or a combination of software and hardware, and the like, that is, the execution subject of the following processing flow is not limited to each logic unit, and may also be hardware or a logic device.
Embodiments of the present application also provide a computer-readable storage medium storing one or more programs, where the one or more programs include instructions, which, when executed by an electronic device including a plurality of application programs, enable the electronic device to perform the method of the embodiment shown in fig. 1, and are specifically configured to perform the following operations:
comparing and fitting a real drilling well logging curve of a current drilling well in a landing stage with a well logging curve of a marking well in the landing stage to calibrate the position of the stratum where the drilling tool is located so as to perform guiding landing control on a drilling track according to the position of the stratum where the drilling tool is located, wherein the marking well is a completed drilling well which is adjacent to the current drilling well;
after the current drilling well is in the horizontal guiding stage, fitting a logging curve of the current drilling well in the horizontal guiding stage with a simulated logging curve to determine an apparent inclination angle of the current section of the drilled stratum, determining the attitude of the next section of the drilled stratum according to the apparent inclination angle of the current section of the drilled stratum, adjusting the drilling direction of the drilling tool according to the attitude of the next section of the drilled stratum, wherein the simulated logging curve is determined according to the logging curve of the marking well in the horizontal guiding stage;
and performing curve form lag analysis on the upper logging curve and the lower logging curve of the current well drilling so as to adjust the well drilling track according to the analysis result.
FIG. 5 is a schematic illustration of a deep shale gas horizontal well geosteering device as provided by an embodiment of the present application. Referring to FIG. 5, in one software implementation, a deep shale gas horizontal well geosteering device comprises:
the calibration unit is used for comparing and fitting a real drilling well logging curve of a current drilling well in a landing stage with a well logging curve of a marking well in the landing stage so as to calibrate the position of the stratum where the drilling tool is located, so that the drilling track is guided and landed according to the position of the stratum where the drilling tool is located, and the marking well is a drilling well which is adjacent to the current drilling well and is completed;
the determining unit is used for fitting the logging curve of the current drilling well in the horizontal guiding stage with the simulated logging curve to determine the apparent inclination angle of the current section of the drilled stratum after the current drilling well is in the horizontal guiding stage, determining the attitude of the next section of the drilled stratum according to the apparent inclination angle of the current section of the drilled stratum, adjusting the drilling direction of the drilling tool according to the attitude of the next section of the drilled stratum, and determining the simulated logging curve according to the logging curve of the marked well in the horizontal guiding stage;
and the hysteresis analysis unit is used for performing curve form hysteresis analysis on the upper logging curve and the lower logging curve of the current drilling well so as to adjust the drilling well track according to the analysis result.
In short, the above description is only a preferred embodiment of this document, and is not intended to limit the scope of protection of this document. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this document shall be included in the protection scope of this document.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
All the embodiments in this document are described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
Claims (9)
1. A deep shale gas horizontal well geosteering method is characterized by comprising the following steps:
comparing and fitting a real drilling well logging curve of a current drilling well in a landing stage with a well logging curve of a marking well in the landing stage to calibrate the position of the stratum where the drilling tool is located so as to perform guiding landing control on a drilling track according to the position of the stratum where the drilling tool is located, wherein the marking well is a completed drilling well which is adjacent to the current drilling well;
after the current drilling well is in a horizontal guiding stage, determining whether a fault exists in front of a drilling tool according to an earthquake slice, if the fault does not exist in front of the drilling tool, fitting a logging curve of the current drilling well in the horizontal guiding stage with a simulated logging curve to determine an apparent dip angle of a drilled stratum of the current section, determining the attitude of a next section of the drilled stratum according to the apparent dip angle of the drilled stratum of the current section, and adjusting the drilling direction of the drilling tool according to the attitude of the next section of the drilled stratum, wherein the simulated logging curve is determined according to the logging curve of the marked well in the horizontal guiding stage;
and performing curve form lag analysis on the upper logging curve and the lower logging curve of the current well drilling so as to adjust the well drilling track according to the analysis result.
2. The method of claim 1, further comprising:
if a fault exists in front of the drilling tool, the drilling track is adjusted according to the type of the fault, so that the drilling tool drills in the direction of the target layer after crossing the fault.
3. The method of claim 2, wherein said adjusting the drilling trajectory according to the fault type comprises:
if the fault type is a reverse fault, adjusting a cutting stratum on the drilling track to cross the fault;
and if the fault type is a positive fault, adjusting the drilling track to undercut the stratum and cross the fault.
4. The method of claim 1, wherein prior to determining from the seismic slice whether a fault exists in front of the drilling tool, the method further comprises:
and acquiring the seismic slice through the three-dimensional seismic data volume.
5. The method of claim 1, wherein after the live drilling log of the current well in the landing phase is fit against the log of the marker well in the landing phase to calibrate the formation location where the drilling tool is located, the method further comprises:
if the drilling tool passes through the landing mark layer, calculating the apparent inclination angle of the landing section in the landing layer according to the thickness of the current stratum when the drilling tool enters a new stratum each time; adjusting the well inclination angle of the drilling tool according to the visual inclination angle of the landing section and the vertical thickness of the current distance to the target point until the drilling tool reaches the target point;
wherein, the landing mark layer is a layer of stratum above the landing layer.
6. The method of claim 1, wherein prior to the comparative fitting of the real drilling log of the current well in the landing phase to the log of the marker well in the landing phase to calibrate the formation location at which the drilling tool is located, the method further comprises:
estimating the vertical depth of the current drilling target point;
the vertical depth of the target entry point of the current drilling well is X1 ═ Y1-Y2+ X2+ Z, wherein Y1 is the vertical depth of the target entry point of the marker well, Y2 is the filling elevation of the marker well, X2 is the filling elevation of the current drilling well, and Z is the depth difference between the current drilling well and the marker well.
7. The utility model provides a deep shale gas horizontal well geosteering device which characterized in that includes:
the calibration unit is used for comparing and fitting a real drilling well logging curve of a current drilling well in a landing stage with a well logging curve of a marking well in the landing stage so as to calibrate the position of the stratum where the drilling tool is located, so that the drilling track is guided and landed according to the position of the stratum where the drilling tool is located, and the marking well is a drilling well which is adjacent to the current drilling well and is completed;
the determining unit is used for determining whether a fault exists in front of the drilling tool according to the seismic slice after the current drilling tool is in the horizontal guiding stage, if the fault does not exist in front of the drilling tool, fitting a logging curve of the current drilling tool in the horizontal guiding stage with a simulated logging curve to determine the apparent dip angle of the current section of drilled stratum, and determining the attitude of the next section of drilled stratum according to the apparent dip angle of the current section of drilled stratum so as to adjust the drilling direction of the drilling tool according to the attitude of the next section of drilled stratum, wherein the simulated logging curve is determined according to the logging curve of the marked well in the horizontal guiding stage;
and the hysteresis analysis unit is used for performing curve form hysteresis analysis on the upper logging curve and the lower logging curve of the current drilling well so as to adjust the drilling well track according to the analysis result.
8. An electronic device is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor and the communication interface are used for realizing the communication between the processor and the memory through the bus;
a memory for storing a computer program;
the processor is used for executing the program stored in the memory and realizing the following processes:
comparing and fitting a real drilling well logging curve of a current drilling well in a landing stage with a well logging curve of a marking well in the landing stage to calibrate the position of the stratum where the drilling tool is located so as to perform guiding landing control on a drilling track according to the position of the stratum where the drilling tool is located, wherein the marking well is a completed drilling well which is adjacent to the current drilling well;
after the current drilling well is in a horizontal guiding stage, determining whether a fault exists in front of a drilling tool according to an earthquake slice, if the fault does not exist in front of the drilling tool, fitting a logging curve of the current drilling well in the horizontal guiding stage with a simulated logging curve to determine an apparent dip angle of a drilled stratum of the current section, determining the attitude of a next section of the drilled stratum according to the apparent dip angle of the drilled stratum of the current section, and adjusting the drilling direction of the drilling tool according to the attitude of the next section of the drilled stratum, wherein the simulated logging curve is determined according to the logging curve of the marked well in the horizontal guiding stage;
and performing curve form lag analysis on the upper logging curve and the lower logging curve of the current well drilling so as to adjust the well drilling track according to the analysis result.
9. A computer-readable storage medium, in which a computer program is stored, which computer program, when being executed by a processor, carries out the following procedure:
comparing and fitting a real drilling well logging curve of a current drilling well in a landing stage with a well logging curve of a marking well in the landing stage to calibrate the position of the stratum where the drilling tool is located so as to perform guiding landing control on a drilling track according to the position of the stratum where the drilling tool is located, wherein the marking well is a completed drilling well which is adjacent to the current drilling well;
after the current drilling well is in a horizontal guiding stage, determining whether a fault exists in front of a drilling tool according to an earthquake slice, if the fault does not exist in front of the drilling tool, fitting a logging curve of the current drilling well in the horizontal guiding stage with a simulated logging curve to determine an apparent dip angle of a drilled stratum of the current section, determining the attitude of a next section of the drilled stratum according to the apparent dip angle of the drilled stratum of the current section, and adjusting the drilling direction of the drilling tool according to the attitude of the next section of the drilled stratum, wherein the simulated logging curve is determined according to the logging curve of the marked well in the horizontal guiding stage;
and performing curve form lag analysis on the upper logging curve and the lower logging curve of the current well drilling so as to adjust the well drilling track according to the analysis result.
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| CN115113299B (en) * | 2022-05-18 | 2023-04-07 | 北京月新时代科技股份有限公司 | Intelligent marking stratum positioning and dividing method, device, equipment and storage medium |
| CN115434688B (en) * | 2022-08-16 | 2024-01-30 | 成都捷科思石油天然气技术发展有限公司 | Drilling curve control method for logging while drilling of horizontal well |
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