CN113534244A - Method and device for determining thickness of reservoir plumb when drilling well meets reservoir - Google Patents
Method and device for determining thickness of reservoir plumb when drilling well meets reservoir Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. analysis, for interpretation, for correction
- G01V1/30—Analysis
- G01V1/306—Analysis for determining physical properties of the subsurface, e.g. impedance, porosity or attenuation profiles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. analysis, for interpretation, for correction
- G01V1/30—Analysis
- G01V1/307—Analysis for determining seismic attributes, e.g. amplitude, instantaneous phase or frequency, reflection strength or polarity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/60—Analysis
- G01V2210/62—Physical property of subsurface
- G01V2210/624—Reservoir parameters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/60—Analysis
- G01V2210/63—Seismic attributes, e.g. amplitude, polarity, instant phase
Abstract
The invention provides a method and a device for determining the thickness of a plumb bob of a reservoir stratum during drilling, wherein the method comprises the following steps: determining an earthquake dip angle attribute body according to the earthquake data; determining the accurate spatial distribution position of the drilling reservoir according to the logging data acoustic curve; determining a pseudo well dip angle curve according to the accurate spatial distribution position of the drilling reservoir and the seismic dip angle attribute body; and determining the thickness of the plumb of the drilling well in the reservoir according to the drilling information and the pseudo well inclination angle curve. The method utilizes the existing seismic data, well logging data acoustic curves and well drilling information, can obtain the thickness of the plumb bob of the drilling well in the reservoir through strict logic calculation, and has no multi-solution and low manual uncontrollable factors in implementation, so that the thickness of the plumb bob of the drilling well in the reservoir can be accurately calculated.
Description
Technical Field
The invention relates to the technical field of earthquake and well logging, in particular to a method and a device for determining the thickness of a reservoir plumb when a drilling well meets a reservoir.
Background
At present, with the continuous development of oil and gas exploration and development, in actual production, it is very important to obtain the vertical thickness of a drilling well in a reservoir stratum. The vertical thickness of the reservoir serves as an important geological parameter, is the basis for correctly explaining and evaluating reservoir characteristics and sedimentation characteristics of the underground stratum, and is a key index for reservoir quantity declaration, well position deployment and exploration evaluation.
If the well is known to be a vertical well or a small-slope well, the vertical thickness of the reservoir can be obtained by directly subtracting the depths of the top and bottom interfaces of the reservoir in the well. If the well is known as a highly deviated well or even a horizontal well, the variation of the vertical thickness of the reservoir is more complicated due to the continuous variation of the well inclination angle and the formation inclination angle.
In actual production, it is very difficult to really require the vertical thickness of a quasi-reservoir, and the main reason is that the dip angle of the stratum is generally difficult to determine, and at present, the main technical means are roughly the following three types:
the first type: and acquiring a formation dip angle while drilling before drilling. In the drilling process, the dip angle of the stratum can be predicted through the leading geological model through real-time geological guiding, density imaging can be performed during the drilling process, some commercial software can be used for automatic pickup, and in the present, the technology is mature, and the application effect of the commercial software is good. However, this is costly in terms of obtaining the formation dip.
The second type: and calculating to obtain the formation dip angle. At present, the means for obtaining the dip angle of the stratum are simple estimation, and there are two main methods: 1. on the well-crossing depth seismic section, calculating the dip angle of the stratum according to the attitude of the stratum; 2. and on the plane graph, obtaining projection coordinates according to the depth value of the top-bottom interface, and reversely calculating the dip angle of the stratum.
Both of these calculation methods are the more common methods in production, because at present, there is no more accurate means for obtaining the dip angle of the formation: the depth seismic section or the plane map is based on time-depth conversion, namely the quality of the time-depth conversion directly influences the accuracy of the calculation of the plumb thickness; on the well-crossing depth profile, the number of CDP in the transverse direction needs to be read manually, and the read error is uncontrollable after the CDP is converted into the length; the projection coordinates obtained by the depth of the top-bottom interface are also needed to be read manually, and the reading error is also an uncontrollable factor.
In the third category: the remaining alternatives. There are two main approaches: 1. estimating inclination values from known adjacent wells in an interpolated manner; 2. the empirical values of the cell range of the study cell are substituted.
Some documents mention the calculation method of the true thickness of the stratum, but the plumb thickness and even the dip angle of the stratum are taken as known conditions, and the true model is subjected to simplification processing. From the existing research results, no technical scheme aiming at reservoir vertical thickness calculation exists.
Disclosure of Invention
The embodiment of the invention provides a method for determining the thickness of a plumb bob of a drilling reservoir, which can accurately obtain the thickness of the plumb bob of the drilling reservoir, and comprises the following steps:
determining an earthquake dip angle attribute body according to the earthquake data;
determining the accurate spatial distribution position of the drilling reservoir according to the logging data acoustic curve;
determining a pseudo well dip angle curve according to the accurate spatial distribution position of the drilling reservoir and the seismic dip angle attribute body;
and determining the thickness of the plumb of the drilling well in the reservoir according to the drilling information and the pseudo well inclination angle curve.
The embodiment of the invention also provides a device for determining the thickness of the plumb of the reservoir when the drilling well meets the reservoir, which comprises the following components:
the earthquake dip angle attribute body determining module is used for determining an earthquake dip angle attribute body according to the earthquake data;
the drilling reservoir accurate spatial distribution position determining module is used for determining the drilling reservoir accurate spatial distribution position according to the logging data acoustic curve;
the pseudo well dip angle curve determining module is used for determining a pseudo well dip angle curve according to the accurate spatial distribution position of the drilling reservoir and the seismic dip angle attribute body;
and the drilling and drilling reservoir plumb thickness determining module is used for determining the drilling and drilling reservoir plumb thickness according to the drilling information and the pseudo well inclination angle curve.
The embodiment of the invention also provides computer equipment which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the method for determining the thickness of the plumb bob of the drilling well encountering reservoir.
Embodiments of the present invention further provide a computer-readable storage medium, which stores a computer program for executing the method for determining the thickness of the plumb bob in the drilling process.
The method and the device for determining the thickness of the plumb of the drilling and encountering reservoir provided by the embodiment of the invention are characterized in that an earthquake dip angle attribute body is obtained on the basis of earthquake data, the accurate spatial distribution position of the drilling and encountering reservoir is obtained according to a logging data acoustic curve, a pseudo-well dip angle curve is extracted and obtained by combining the obtained earthquake dip angle attribute body, and finally the thickness of the plumb of the drilling and encountering reservoir is determined according to drilling information and the pseudo-well dip angle curve.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. In the drawings:
fig. 1 is a schematic diagram of a method for determining a thickness of a plumb of a drilling encounter reservoir according to an embodiment of the invention.
Fig. 2 is a schematic diagram of a borehole X-well seismic calibration in an example of a method for determining a thickness of a plumb of a reservoir encountered by a borehole according to an embodiment of the present invention.
Fig. 3 is a diagram illustrating a format of formation dip data extracted from a borehole X in an example of a method for determining a thickness of a plumb of a reservoir encountered by a borehole drilling according to an embodiment of the present invention.
Fig. 4 is a schematic view of a drilling direction of a drilling tool in a method for determining a thickness of a plumb of a reservoir according to an embodiment of the present invention.
Fig. 5 is a table of calculation of the thickness of the plumb of the partial drilling encounter reservoir in an example of the method for determining the thickness of the plumb of the drilling encounter reservoir according to the embodiment of the present invention.
Fig. 6 is a schematic diagram of a computer device for executing a method for determining the thickness of a plumb of a drilling encounter reservoir implemented by the invention.
Fig. 7 is a schematic diagram of a device for determining the thickness of a plumb of a reservoir encountered by a drilling tool according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
As shown in fig. 1, a schematic diagram of a method for determining a thickness of a plumb bob in a drilling encounter reservoir in an embodiment of the present invention is provided, an embodiment of the present invention provides a method for determining a thickness of a plumb bob in a drilling encounter reservoir, which can accurately obtain a thickness of a plumb bob in a drilling encounter reservoir, and includes:
step 101: determining an earthquake dip angle attribute body according to the earthquake data;
step 102: determining the accurate spatial distribution position of the drilling reservoir according to the logging data acoustic curve;
step 103: determining a pseudo well dip angle curve according to the accurate spatial distribution position of the drilling reservoir and the seismic dip angle attribute body;
step 104: and determining the thickness of the plumb of the drilling well in the reservoir according to the drilling information and the pseudo well inclination angle curve.
The method for determining the thickness of the plumb of the drilling and encountering reservoir provided by the embodiment of the invention comprises the steps of obtaining an earthquake dip angle attribute body based on earthquake data, obtaining the accurate space distribution position of the drilling and encountering reservoir according to a logging data acoustic curve, extracting and obtaining a pseudo well dip angle curve by combining the obtained earthquake dip angle attribute body, and finally determining the thickness of the plumb of the drilling and encountering reservoir according to drilling information and the pseudo well dip angle curve.
In an embodiment of the present invention, a method for determining a thickness of a plumb of a drilling tool in a reservoir may include:
determining an earthquake dip angle attribute body according to the earthquake data; determining the accurate spatial distribution position of the drilling reservoir according to the logging data acoustic curve; determining a pseudo well dip angle curve according to the accurate spatial distribution position of the drilling reservoir and the seismic dip angle attribute body; and determining the thickness of the plumb of the drilling well in the reservoir according to the drilling information and the pseudo well inclination angle curve.
In an embodiment of the present invention, when the method for determining the thickness of the plumb of the drilling encounter reservoir is implemented, the method for determining the seismic dip attribute body according to the seismic data includes:
and extracting the variation characteristics of the seismic dip angle on the basis of the seismic data to obtain the seismic dip angle attribute body.
In the embodiment, the change characteristics of the seismic dip of the stratum in the area are extracted on the basis of the seismic data, and the dip body of the seismic data is obtained. The earthquake inclination angle body can be obtained by using earthquake commercial software, and the inclination angle body which is as accurate as possible needs to be obtained in actual production, so that the time window can be smaller when the time window is set, and the number of the longitudinal and transverse search points can be smaller, for example, 3 sampling points can be set longitudinally and transversely.
In an embodiment of the present invention, when the method for determining the thickness of the plumb of the drilling encounter reservoir is implemented, the determining an accurate spatial distribution position of the drilling encounter reservoir according to the acoustic curve of the logging data includes:
making a seismic synthetic record according to the logging data acoustic curve;
and performing seismic logging fine calibration by using the wave group characteristics of the seismic synthetic record and referring to the calibration condition of the adjacent vertical well, and determining the accurate spatial distribution position of the drilling reservoir.
In a specific implementation of the method for determining the thickness of the plumb of the reservoir encountered by the drilling bit according to the embodiment of the present invention, in an embodiment, the calibration of the adjacent vertical well includes:
the top of the adjacent region vertical well reservoir is positioned at the zero point of the strong homodromous axis of the seismic section, and the bottom of the adjacent region vertical well reservoir is positioned at the wave trough under the strong homodromous axis of the seismic section.
In the embodiment, fig. 2 is a schematic diagram of a borehole X-well seismic calibration in an example of the method for determining the thickness of the plumb of the borehole drilling reservoir according to the embodiment of the present invention, and as shown in fig. 2, the seismic logging is finely calibrated according to a logging acoustic curve to obtain an accurate spatial distribution position of the borehole drilling reservoir on a seismic profile. As can be seen from fig. 2, the complex logs and the wave group characteristics of the well side channels have a certain difference in the calibration of the reservoir section because the horizontal well is transversely extended during the drilling process, and the complex logs (wavelets) are compressed in the longitudinal direction, which causes inconsistency between the complex logs and the wave group characteristics of the seismic profile. Therefore, the horizontal well can not only depend on the wave group relation during calibration, and also needs to refer to the vertical well calibration condition of the adjacent region, the top of the reservoir is positioned at the zero point of the strong homodromous axis of the seismic section, and the bottom of the reservoir is positioned at the wave trough under the strong homodromous axis of the seismic section. In practice, there will be some differences between the top and bottom of the reservoir, and the above-mentioned fig. 2 is only an illustration of an example.
The difference in the seismic wave group relationship will affect the seismic inversion but will not affect the spatial spread position, and in step 102, the objective is to obtain the accurate spatial spread position of the well by using the wave group characteristics and referring to the calibration of the adjacent well.
In a specific implementation of the method for determining the thickness of the plumb of the drilling encounter reservoir according to the embodiment of the present invention, in one embodiment, the determining a pseudo-well dip curve according to the accurate spatial distribution position of the drilling encounter reservoir and the seismic dip attribute body includes:
and extracting formation dip angle information from the seismic dip angle attribute body according to the well track according to the accurate spatial distribution position of the drilling reservoir, and determining a pseudo well dip angle curve.
In an embodiment of the method for determining the thickness of the plumb of the reservoir encountered by the drilling tool in the embodiment of the present invention, the well trajectory includes: drilling depth and setting sampling points;
extracting formation dip angle information from the seismic dip angle attribute body according to a well track, wherein the method comprises the following steps:
and extracting formation dip angle information from the seismic dip angle attribute body according to the drilling depth and the set sampling point.
In the embodiment, according to the accurate spatial distribution position of the drilling and encountering reservoir of the track of the highly-deviated well or the horizontal well, the change of the inclination angle of the formation beside the well is extracted strictly according to the track of the well, namely the extraction of the inclination angle curve of the pseudo well. Because the pseudo-well inclination angle curve is not a real logging curve, the pseudo-well inclination angle curve is extracted according to the drilling depth and a given sampling rate and has formation inclination angle information. Fig. 3 is a format of the formation dip data extracted from the X well in an example of the method for determining the thickness of the plumb of the reservoir encountered by the well drilling according to the embodiment of the present invention.
In an embodiment of the method for determining the thickness of the plumb of the drilling encounter reservoir according to the embodiment of the present invention, the drilling information includes: well dip, reservoir thickness, drilling direction;
determining the thickness of a drilling well in the process of meeting the reservoir plumb according to the drilling information and the pseudo well inclination angle curve, and the method comprises the following steps:
and extracting a formation dip angle from the pseudo well dip angle curve, and determining the thickness of the plumb bob of the drilling well encountering reservoir according to the formation dip angle, the well dip angle and the thickness of the reservoir.
Fig. 4 is a schematic view of a drilling direction of a drilling tool in a method for determining a thickness of a plumb of a reservoir according to an embodiment of the present invention. As shown in fig. 4 (a), in the implementation of the method for determining the thickness of the plumb of the drilling encounter reservoir according to the embodiment of the present invention, in an embodiment, when the drilling direction is the formation tilt-up direction, the thickness of the plumb of the drilling encounter reservoir is determined as follows:
AB＝AD·COS(α-θ)/COSθ
wherein AB is the thickness of a drilling well in the plumb of a reservoir; AD is the slant thickness of the reservoir; alpha is the well inclination angle; theta is the formation dip.
While the foregoing expressions for determining the thickness of a wellbore in a formation have been described by way of example, those skilled in the art will appreciate that the above equations may be modified and other parameters or data may be added as needed, or other specific equations may be provided, and such modifications are intended to fall within the scope of the present invention.
Fig. 5 is a table of calculation of the thickness of the plumb of the partial drilling encounter reservoir in an example of the method for determining the thickness of the plumb of the drilling encounter reservoir according to the embodiment of the present invention. As shown in fig. 5, after the thickness of the plumb of the drilling meeting reservoir corresponding to each drilling depth is obtained through calculation, the thicknesses of the plumb of the drilling meeting reservoir corresponding to all the drilling depths are accumulated (i.e., the last column in the table of fig. 5), so as to obtain the thickness of the plumb of the drilling meeting reservoir corresponding to the drilling depth interval.
Fig. 4 is a schematic view of a drilling direction of a drilling tool in a method for determining a thickness of a plumb of a reservoir according to an embodiment of the present invention. As shown in fig. 4 (b), in the implementation of the method for determining the thickness of the plumb of the drilling encounter reservoir according to the embodiment of the present invention, in an embodiment, when the drilling direction is a downward-inclined direction of the formation, the thickness of the plumb of the drilling encounter reservoir is determined as follows:
AB＝AD·COS(α+θ)/COSθ
wherein AB is the thickness of a drilling well in the plumb of a reservoir; AD is the slant thickness of the reservoir; alpha is the well inclination angle; theta is the formation dip.
While the foregoing expressions for determining the thickness of a wellbore in a formation have been described by way of example, those skilled in the art will appreciate that the above equations may be modified and other parameters or data may be added as needed, or other specific equations may be provided, and such modifications are intended to fall within the scope of the present invention.
In an embodiment of the method for determining the thickness of the plumb of the drilling encounter reservoir according to the embodiment of the present invention, the method for extracting the formation dip from the pseudo-well dip curve includes:
and extracting a stratum inclination angle from the pseudo-well inclination angle curve, adjusting the sampling interval between the well inclination angle and the stratum inclination angle, and matching the well inclination angle with the stratum inclination angle to ensure that the sampling interval between the well inclination angle and the stratum inclination angle is the same, thereby realizing uniform sampling.
Fig. 6 is a schematic diagram of a computer device for executing a method for determining a thickness of a drilling well encountering reservoir plumb, according to the embodiment of the invention, as shown in fig. 6, a computer device is further provided, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the computer program is executed by the processor, the method for determining a thickness of a drilling well encountering reservoir plumb is implemented.
Embodiments of the present invention further provide a computer-readable storage medium, where the computer-readable storage medium stores a computer program for executing the method for determining the thickness of the plumb of the reservoir during drilling.
The embodiment of the invention also provides a device for determining the thickness of the plumb of the reservoir encountered by the drilling bit, and the device is described in the following embodiment. Because the principle of solving the problems of the device is similar to the method for determining the thickness of the reservoir plumb when the drilling bit meets the reservoir, the implementation of the device can refer to the implementation of the method for determining the thickness of the reservoir plumb when the drilling bit meets the reservoir, and repeated parts are not repeated.
As shown in fig. 7, an embodiment of the present invention further provides an apparatus for determining a thickness of a plumb of a drilling tool encountering a reservoir, including:
the earthquake dip angle attribute body determining module 701 is used for determining an earthquake dip angle attribute body according to earthquake data;
the accurate spatial distribution position determination module 702 of the drilling reservoir is used for determining the accurate spatial distribution position of the drilling reservoir according to the logging data acoustic curve;
the pseudo well dip angle curve determining module 703 is configured to determine a pseudo well dip angle curve according to the accurate spatial distribution position of the drilling reservoir and the seismic dip angle attribute body;
and the drilling and encountering reservoir plumb thickness determining module 704 is used for determining the drilling and encountering reservoir plumb thickness according to the drilling information and the pseudo well inclination angle curve.
In an embodiment of the invention, when the apparatus for determining the thickness of the plumb of the reservoir during drilling is implemented, the seismic dip attribute determining module is specifically configured to:
and extracting the variation characteristics of the seismic dip angle on the basis of the seismic data to obtain the seismic dip angle attribute body.
In an embodiment of the present invention, when the apparatus for determining the thickness of the plumb of the drilling tool in the reservoir is implemented, the module for determining the accurate spatial distribution position of the drilling tool in the reservoir is specifically configured to:
making a seismic synthetic record according to the logging data acoustic curve;
and performing seismic logging fine calibration by using the wave group characteristics of the seismic synthetic record and referring to the calibration condition of the adjacent vertical well, and determining the accurate spatial distribution position of the drilling reservoir.
In an embodiment of the present invention, when a drilling tool meets a device for determining a thickness of a reservoir plumb, the method for determining a vertical well calibration condition of a neighboring area includes:
the top of the adjacent region vertical well reservoir is positioned at the zero point of the strong homodromous axis of the seismic section, and the bottom of the adjacent region vertical well reservoir is positioned at the wave trough under the strong homodromous axis of the seismic section.
In an embodiment of the invention, when the apparatus for determining the thickness of the plumb of the reservoir during drilling is implemented, the pseudo-well inclination curve determining module is specifically configured to:
and extracting formation dip angle information from the seismic dip angle attribute body according to the well track according to the accurate spatial distribution position of the drilling reservoir, and determining a pseudo well dip angle curve.
In an embodiment, when the apparatus for determining the thickness of the plumb of the reservoir is applied to a drilling tool, the well trajectory includes: drilling depth and setting sampling points;
extracting formation dip angle information from the seismic dip angle attribute body according to a well track, wherein the method comprises the following steps:
and extracting formation dip angle information from the seismic dip angle attribute body according to the drilling depth and the set sampling point.
In an embodiment of the present invention, when a drilling tool encounters a device for determining a thickness of a reservoir plumb, the drilling information includes: well dip, reservoir thickness, drilling direction;
a pseudo-well inclination curve determination module further configured to:
and extracting a formation dip angle from the pseudo well dip angle curve, and determining the thickness of the plumb bob of the drilling well encountering reservoir according to the formation dip angle, the well dip angle and the thickness of the reservoir.
In a specific implementation of the apparatus for determining the thickness of the plumb of the drilling tool in the reservoir according to the embodiment of the present invention, in an embodiment, the pseudo-well inclination curve determining module is further configured to determine the thickness of the plumb of the drilling tool in the reservoir according to the following manner when the drilling direction is the formation inclination direction:
AB＝AD·COS(α-θ)/COSθ
wherein AB is the thickness of a drilling well in the plumb of a reservoir; AD is the slant thickness of the reservoir; alpha is the well inclination angle; theta is the formation dip.
While the foregoing expressions for determining the thickness of a wellbore in a formation have been described by way of example, those skilled in the art will appreciate that the above equations may be modified and other parameters or data may be added as needed, or other specific equations may be provided, and such modifications are intended to fall within the scope of the present invention.
In a specific implementation of the apparatus for determining the thickness of the plumb of the drilling tool in the reservoir according to the embodiment of the present invention, in an embodiment, the pseudo-well inclination curve determining module is further configured to determine the thickness of the plumb of the drilling tool in the reservoir according to the following manner when the drilling direction is a downward inclination direction of a formation:
AB＝AD·COS(α+θ)/COSθ
wherein AB is the thickness of a drilling well in the plumb of a reservoir; AD is the slant thickness of the reservoir; alpha is the well inclination angle; theta is the formation dip.
While the foregoing expressions for determining the thickness of a wellbore in a formation have been described by way of example, those skilled in the art will appreciate that the above equations may be modified and other parameters or data may be added as needed, or other specific equations may be provided, and such modifications are intended to fall within the scope of the present invention.
In an embodiment of the invention, when the apparatus for determining the thickness of the plumb of the reservoir during drilling is implemented, the pseudo-well inclination curve determining module is further configured to:
and extracting a stratum inclination angle from the pseudo well inclination angle curve, and adjusting the sampling interval between the well inclination angle and the stratum inclination angle to ensure that the sampling interval between the well inclination angle and the stratum inclination angle is the same.
To sum up, the method and the device for determining the thickness of the plumb of the drilling and encountering reservoir provided by the embodiment of the invention obtain the seismic dip attribute body based on seismic data, obtain the accurate spatial distribution position of the drilling and encountering reservoir according to the logging data acoustic curve, extract and obtain the pseudo-well dip curve by combining the seismic dip attribute body obtained, and finally determine the thickness of the plumb of the drilling and encountering reservoir according to the drilling information and the pseudo-well dip curve.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (20)
1. A method for determining the thickness of a plumb of a drilling well encountering reservoir is characterized by comprising the following steps:
determining an earthquake dip angle attribute body according to the earthquake data;
determining the accurate spatial distribution position of the drilling reservoir according to the logging data acoustic curve;
determining a pseudo well dip angle curve according to the accurate spatial distribution position of the drilling reservoir and the seismic dip angle attribute body;
and determining the thickness of the plumb of the drilling well in the reservoir according to the drilling information and the pseudo well inclination angle curve.
2. The method of claim 1, wherein determining a seismic dip attribute volume from the seismic data comprises:
and extracting the variation characteristics of the seismic dip angle on the basis of the seismic data to obtain the seismic dip angle attribute body.
3. The method of claim 1, wherein determining an accurate spatial spread of the borehole from the log acoustic profile comprises:
making a seismic synthetic record according to the logging data acoustic curve;
and performing seismic logging fine calibration by using the wave group characteristics of the seismic synthetic record and referring to the calibration condition of the adjacent vertical well, and determining the accurate spatial distribution position of the drilling reservoir.
4. The method of claim 1, wherein determining a pseudo-well dip profile based on the accurate spatial spread locations of the drilling encounter reservoir and the seismic dip attribute comprises:
and extracting formation dip angle information from the seismic dip angle attribute body according to the well track according to the accurate spatial distribution position of the drilling reservoir, and determining a pseudo well dip angle curve.
5. The method of claim 4, wherein the well trajectory comprises: drilling depth and setting sampling points;
extracting formation dip angle information from the seismic dip angle attribute body according to a well track, wherein the method comprises the following steps:
and extracting formation dip angle information from the seismic dip angle attribute body according to the drilling depth and the set sampling point.
6. The method of claim 1,
the drilling information, comprising: well dip, reservoir thickness, drilling direction;
determining the thickness of a drilling well in the process of meeting the reservoir plumb according to the drilling information and the pseudo well inclination angle curve, and the method comprises the following steps:
and extracting a formation dip angle from the pseudo well dip angle curve, and determining the thickness of the plumb bob of the drilling well encountering reservoir according to the formation dip angle, the well dip angle and the thickness of the reservoir.
7. The method of claim 6,
when the drilling direction is the stratum tilt-up direction, determining the thickness of the plumb of the drilling meeting reservoir according to the following mode:
AB＝AD·COS(α-θ)/COSθ
wherein AB is the thickness of a drilling well in the plumb of a reservoir; AD is the slant thickness of the reservoir; alpha is the well inclination angle; theta is the formation dip.
8. The method of claim 6,
when the drilling direction is the downward inclination direction of the stratum, the thickness of the plumb bob of the drilling meeting reservoir is determined according to the following mode:
AB＝AD·COS(α+θ)/COSθ
wherein AB is the thickness of a drilling well in the plumb of a reservoir; AD is the slant thickness of the reservoir; alpha is the well inclination angle; theta is the formation dip.
9. The method of claim 6, wherein extracting the formation dip from the pseudo-well dip profile comprises:
and extracting a stratum inclination angle from the pseudo well inclination angle curve, and adjusting the sampling interval between the well inclination angle and the stratum inclination angle to ensure that the sampling interval between the well inclination angle and the stratum inclination angle is the same.
10. A device for determining a thickness of a plumb line of a drilling tool in a reservoir, comprising:
the earthquake dip angle attribute body determining module is used for determining an earthquake dip angle attribute body according to the earthquake data;
the drilling reservoir accurate spatial distribution position determining module is used for determining the drilling reservoir accurate spatial distribution position according to the logging data acoustic curve;
the pseudo well dip angle curve determining module is used for determining a pseudo well dip angle curve according to the accurate spatial distribution position of the drilling reservoir and the seismic dip angle attribute body;
and the drilling and drilling reservoir plumb thickness determining module is used for determining the drilling and drilling reservoir plumb thickness according to the drilling information and the pseudo well inclination angle curve.
11. The apparatus of claim 10, wherein the seismic dip attribute determination module is specifically configured to:
and extracting the variation characteristics of the seismic dip angle on the basis of the seismic data to obtain the seismic dip angle attribute body.
12. The apparatus of claim 10, wherein the module for determining the exact spatial spread location of the drilling encounter reservoir is specifically configured to:
making a seismic synthetic record according to the logging data acoustic curve;
and performing seismic logging fine calibration by using the wave group characteristics of the seismic synthetic record and referring to the calibration condition of the adjacent vertical well, and determining the accurate spatial distribution position of the drilling reservoir.
13. The apparatus of claim 10, wherein the pseudo-well inclination curve determination module is specifically configured to:
and extracting formation dip angle information from the seismic dip angle attribute body according to the well track according to the accurate spatial distribution position of the drilling reservoir, and determining a pseudo well dip angle curve.
14. The apparatus of claim 13, wherein the well trajectory comprises: drilling depth and setting sampling points;
extracting formation dip angle information from the seismic dip angle attribute body according to a well track, wherein the method comprises the following steps:
and extracting formation dip angle information from the seismic dip angle attribute body according to the drilling depth and the set sampling point.
15. The apparatus of claim 10,
the drilling information, comprising: well dip, reservoir thickness, drilling direction;
a pseudo-well inclination curve determination module further configured to:
and extracting a formation dip angle from the pseudo well dip angle curve, and determining the thickness of the plumb bob of the drilling well encountering reservoir according to the formation dip angle, the well dip angle and the thickness of the reservoir.
16. The apparatus of claim 15,
the pseudo-well inclination angle curve determining module is further used for determining the thickness of the plumb bob of the drilling well in the reservoir layer according to the following mode when the drilling direction is the stratum upward inclination direction:
AB＝AD·COS(α-θ)/COSθ
wherein AB is the thickness of a drilling well in the plumb of a reservoir; AD is the slant thickness of the reservoir; alpha is the well inclination angle; theta is the formation dip.
17. The apparatus of claim 15,
the pseudo-well inclination angle curve determining module is further used for determining the thickness of the plumb bob of the drilling well in the reservoir layer according to the following mode when the drilling direction is the downward inclination direction of the stratum:
AB＝AD·COS(α+θ)/COSθ
wherein AB is the thickness of a drilling well in the plumb of a reservoir; AD is the slant thickness of the reservoir; alpha is the well inclination angle; theta is the formation dip.
18. The apparatus of claim 15, wherein the pseudo-well inclination profile determination module is further configured to:
and extracting a stratum inclination angle from the pseudo well inclination angle curve, and adjusting the sampling interval between the well inclination angle and the stratum inclination angle to ensure that the sampling interval between the well inclination angle and the stratum inclination angle is the same.
19. A computer apparatus comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor when executing the computer program performing the method of determining a thickness of a reservoir plumb encountered by a drilling well according to any one of claims 1 to 9.
20. A computer readable storage medium storing a computer program for performing a method of determining a thickness of a plumb of a reservoir encountered by a drilling well according to any one of claims 1 to 9.
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