CN114970071A - Favorable reservoir identification method and system for eruption rocks - Google Patents
Favorable reservoir identification method and system for eruption rocks Download PDFInfo
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- G06F30/20—Design optimisation, verification or simulation
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
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- G01V1/40—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging
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Abstract
The invention discloses a favorable reservoir identification method and a favorable reservoir identification system for eruption rocks, wherein the method comprises the following steps: obtaining rock debris information in a drilling process, selecting a rock debris sample according to the rock debris information, identifying and analyzing the rock debris sample to obtain a rock debris sample of eruptive rock, and determining a corresponding volcanic rock stratum section; selecting a standard layer according to the volcanic rock layer section, and carrying out standardization processing on a logging curve of the standard layer by adopting a trend surface analysis method to obtain a standardized curve; carrying out curve reconstruction according to the standardized curve; determining a volcanic rock base value and a surrounding rock base value on the reconstruction curve, and determining a favorable reservoir development section of the eruption rock according to the volcanic rock base value and the surrounding rock base value; performing rock debris observation on rock debris data in the drilling process, performing a fluorescence experiment to determine the oil-gas content, and performing processing analysis and reconstruction according to the oil-gas content and gas measurement data to obtain a favorable oil-gas development section; and obtaining the favorable reservoir identification result of the eruption rock according to the favorable reservoir development section and the favorable oil and gas development section.
Description
Technical Field
The invention belongs to the technical field of oil exploration and development, and relates to a favorable reservoir identification method and system for eruption rocks.
Background
Petroleum and natural gas are life lines of national industry, and more oil and gas resources are urgently needed to be found due to the requirement of economic sustainable development; among them, volcanic rock hydrocarbon reservoirs are one of the important sources of oil and gas resources. Since the 70 s of the 19 th century, the volcanic rock reservoirs were studied over 100 years, and relatively well-known reservoirs such as the Jijing-eastern Cuwasaki rhyolite reservoir, the Gikenia Gittiba mountain reservoir, Indonesia, and the Binieh-Bikenya syenite reservoir, Arizona, were discovered. In 70's of the 20 th century in China, volcanic rock industrial oil and gas reservoirs were found in the Bohai Bay basin, and then a plurality of volcanic rock oil and gas reservoirs were found in the areas of the pseudo-Song basin, the binary basin, the Liaoh river depression and the like. Volcanic hydrocarbon reservoirs are gradually playing an important field of oil and gas resource potential, and the reservoir proportion is gradually increased.
Eruption of rock is an inevitable issue in the research of volcanic hydrocarbon reservoirs. Identification of eruption rock reservoirs, particularly identification of favorable reservoirs of rhyolite in the eruption rock, has been a major difficulty. The rhyolite is generally grayish brown, grayish white, light grayish red, compact and blocky, cracks develop and have a spot structure, spot crystals are quartz, albite and mica, and the matrix is mostly Fei fine structure and cryptocrystalline structure. From the current research situation at home and abroad, how to identify the favorable reservoir stratum of the rhyolite, especially on the premise of no seismic data and imaging logging data, no relevant deep research exists at present, and no targeted good method exists.
In summary, a technical scheme capable of identifying favorable reservoirs of the eruption rocks is needed, so as to guide exploration and development of the eruption rock oil and gas reservoir.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a favorable reservoir identification method and a favorable reservoir identification system for eruption rocks; the method and the system can identify the favorable reservoir stratum of the eruption rock in a targeted manner by the methods of rock debris identification, well logging identification, gas logging curve identification and the like under the condition of no seismic data and imaging well logging data, the identification result has better accuracy and effectiveness, important geological basis can be provided for the subsequent perforation well section, and the method and the system have important practical significance on oil-gas exploration and development of the eruption rock reservoir.
In a first aspect of embodiments of the present invention, a method for favorable reservoir identification of a eruptive rock is presented, the method comprising:
obtaining rock debris information in a drilling process, selecting a rock debris sample according to the rock debris information, identifying and analyzing the rock debris sample to obtain a rock debris sample of eruption rock, and determining a corresponding volcanic rock stratum section;
selecting a standard layer according to the volcanic rock layer section, and standardizing the logging curve of the standard layer by adopting a trend surface analysis method to obtain a standardized curve;
performing curve reconstruction according to the standardized curve to determine a volcanic rock base value and a surrounding rock base value on a reconstruction curve, and determining a favorable reservoir development section of the eruption rock according to the volcanic rock base value and the surrounding rock base value;
performing rock debris observation on rock debris data in a drilling process, performing a fluorescence experiment to determine the oil-gas content, and performing processing analysis and reconstruction according to the oil-gas content and gas measurement data to obtain a favorable oil-gas development section;
and obtaining the favorable reservoir identification result of the eruption rock according to the favorable reservoir development section and the favorable oil and gas development section.
Further, the method comprises the steps of obtaining rock debris information in the drilling process, selecting a rock debris sample according to the rock debris information, identifying and analyzing the rock debris sample to obtain a rock debris sample of the eruptive rock, and determining a corresponding volcanic rock interval, wherein the steps comprise:
selecting a rock debris sample according to rock debris information in a drilling process by combining the regional geological condition and adjacent well information;
and performing slice identification analysis on the rock debris sample, determining the components and the structural structure of the sample, obtaining the rock debris sample of the eruption rock, and determining the corresponding volcanic rock stratum section.
Further, a standard layer is selected according to the volcanic rock layer section, and the method comprises the following steps:
and selecting an interval with the development degree and the property stability meeting preset requirements and the distance between the interval and the volcanic rock interval within a threshold range in the research area as a standard layer.
Further, the method for analyzing the trend surface is adopted to standardize the well logging curve of the standard layer to obtain a standardized curve, and comprises the following steps:
and (3) carrying out standardization processing on the logging curves of natural gamma rays, deep lateral resistance, sound waves, density and neutrons by adopting a trend surface analysis method to obtain a standardized curve.
Further, the method further comprises:
and carrying out normalization processing on the normalized curves of natural gamma, deep lateral resistance, sound wave, density and neutron.
Further, performing curve reconstruction according to the normalized curve, including:
and carrying out curve reconstruction on the curve subjected to the normalization treatment, wherein the reconstructed curve is as follows:
X＝RT/RT max +[(DEN/DEN max )·(GR/GR max )]/[(AC/AC max )·(CN/CN max )]；
wherein, X is a reconstructed curve for identifying the favorable reservoir of the eruption rock, GR is natural gamma, RT is deep lateral resistance, AC is sound wave, CN is neutron, DEN is density, the parameter with subscript max represents the maximum value of the parameter, and the parameter without subscript is the corresponding standardized curve measured value.
Further, determining a volcanic rock base value and a surrounding rock base value on the reconstruction curve, and determining a favorable reservoir development section of the eruption rock according to the volcanic rock base value and the surrounding rock base value, wherein the method comprises the following steps:
determining a volcanic rock base value K on the reconstruction curve X 1 And surrounding rock base value K 2 Wherein, in the step (A),
wherein, X i Is X max To (X) max -1) values of X, n being a number, X max Is the maximum of the reconstructed curve;
wherein, X' i Is X min To (X) min +1) X, n is the number, X min The minimum of the reconstructed curve.
Further, rock debris observation is carried out according to rock debris data in the drilling process, a fluorescence experiment is carried out to determine the oil-gas content, processing analysis and reconstruction are carried out according to the oil-gas content and the gas measurement data, and a favorable oil-gas development section is obtained, and the method comprises the following steps:
the formula adopted for processing, analyzing and reconstructing the oil-gas-containing data and the gas measurement data is as follows:
Y＝2·(T+C1+C2+C3+IC4+NC4)/(T max +C1 max +C2 max +C3 max +IC4 max +NC4 max )；
wherein Y is a reconstruction curve, T is the sum of gaseous substances separated from the drilling fluid, C1 is methane, C2 is ethane, C3 is propane, IC4 is isobutane, NC4 is n-butane, the parameter with subscript max represents the maximum gas content, and the parameter without subscript is the gas content obtained by processing and analyzing according to the oil-gas-containing property and gas measurement data;
and selecting a part larger than a set threshold value on the reconstruction curve Y as a favorable oil and gas development section.
In a second aspect of embodiments of the present invention, there is provided a favorable reservoir identification system for eruption rock, the system comprising:
the sample analysis module is used for acquiring rock debris information in the drilling process, selecting a rock debris sample according to the rock debris information, identifying and analyzing the rock debris sample to obtain a rock debris sample of eruptive rock, and determining a corresponding volcanic rock interval;
the well logging curve processing module is used for selecting a standard layer according to the volcanic rock layer section and standardizing the well logging curve of the standard layer by adopting a trend surface analysis method to obtain a standardized curve;
the curve reconstruction module is used for reconstructing a curve according to the standardized curve;
the favorable reservoir development section analysis module is used for determining a volcanic rock base value and a surrounding rock base value on the reconstruction curve and determining a favorable reservoir development section of the eruption rock according to the volcanic rock base value and the surrounding rock base value;
the favorable oil and gas development section analysis module is used for performing rock debris observation on rock debris data in a drilling process, performing a fluorescence experiment to determine the oil and gas content, and performing processing analysis and reconstruction according to the oil and gas content and gas measurement data to obtain a favorable oil and gas development section;
and the result processing module is used for obtaining the favorable reservoir identification result of the eruption rock according to the favorable reservoir development section and the favorable oil and gas development section.
In a third aspect of embodiments of the present invention, a computer device is presented, 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 implementing a method of favorable reservoir identification of a eruptive rock.
In a fourth aspect of embodiments of the present invention, a computer-readable storage medium is presented, which stores a computer program, which when executed by a processor, implements a method of favorable reservoir identification of a eruptive rock.
The favorable reservoir stratum identification method and system for the eruption rock utilize methods such as rock debris identification, well logging identification and gas logging curve identification to identify the favorable reservoir stratum of the oil-gas reservoir of the eruption rock, the identification result has better accuracy and effectiveness, important geological basis can be provided for subsequent determination of a perforation well section, and the method and system have important practical significance for oil-gas exploration and development of the oil reservoir of the eruption rock.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flow diagram of a method for identifying favorable reservoirs for eruption rocks according to an embodiment of the invention.
Fig. 2A and 2B are schematic diagrams of a GR curve before and after normalization, respectively, according to an embodiment of the present invention.
Figure 3 is a schematic diagram of an advantageous reservoir and advantageous hydrocarbon-bearing formation screening according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of an advantageous reservoir identification system architecture for a eruption rock according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a computer device according to an embodiment of the present invention.
Detailed Description
The principles and spirit of the present invention will be described with reference to a number of exemplary embodiments. It is understood that these embodiments are given solely for the purpose of enabling those skilled in the art to better understand and to practice the invention, and are not intended to limit the scope of the invention in any way. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As will be appreciated by one skilled in the art, embodiments of the present invention may be embodied as a system, apparatus, device, method, or computer program product. Accordingly, the present disclosure may be embodied in the form of: entirely hardware, entirely software (including firmware, resident software, micro-code, etc.), or a combination of hardware and software.
According to the embodiment of the invention, a favorable reservoir identification method and system for eruption rocks are provided.
The principles and spirit of the present invention are explained in detail below with reference to several representative embodiments of the invention.
Fig. 1 is a flow chart illustrating a method for identifying favorable reservoirs of eruption rocks according to an embodiment of the present invention. As shown in fig. 1, the method includes:
s101, obtaining rock debris information in a drilling process, selecting a rock debris sample according to the rock debris information, carrying out identification analysis on the rock debris sample to obtain a rock debris sample of eruptive rock, and determining a corresponding volcanic rock interval;
step S102, selecting a standard layer according to the volcanic rock stratum section, and standardizing the logging curve of the standard layer by adopting a trend surface analysis method to obtain a standardized curve;
step S103, carrying out curve reconstruction according to the standardized curve;
step S104, determining a volcanic rock base value and a surrounding rock base value on the reconstruction curve, and determining a favorable reservoir development section of the eruption rock according to the volcanic rock base value and the surrounding rock base value;
s105, performing rock debris observation on rock debris data in the drilling process, performing a fluorescence experiment to determine the oil-gas content, and performing processing analysis and reconstruction according to the oil-gas content and the gas measurement data to obtain a favorable oil-gas development section;
and S106, obtaining a favorable reservoir identification result of the eruption rock according to the favorable reservoir development section and the favorable oil and gas development section.
For a clearer explanation of the above-described method for identifying advantageous reservoirs of erupted rock, a detailed description is given below in connection with each step.
Step S101:
selecting a rock debris sample according to rock debris information in a drilling process by combining the regional geological condition and adjacent well information;
and performing slice identification analysis on the rock debris sample, determining the components and the structural structure of the sample, obtaining the rock debris sample of the eruption rock, and determining the corresponding volcanic rock stratum section.
And analyzing the color change characteristics of the rock debris by observing the colors of rock debris of the volcanic rock layer section and surrounding rock sections of 10-100m above and below the volcanic rock layer section, and determining the depth of the color change node of the rock debris. Generally, the surrounding rock at the lower part of the eruption rock is baked at high temperature, and the color is black (the code is 8 series), and gradually transits downwards to the natural color of the surrounding rock, and the surrounding rock is generally gray series (the code is 7 series). The upper part of the eruption rock is subjected to weathering leaching to form a weathering leaching zone, and the color of the weathering leaching zone is the natural color of the eruption rock. And the color of the surrounding rock at the upper part of the eruption rock is directly sedimentary rock without high-temperature roasting, and the color of the rock is the natural color of the sedimentary rock, is not black, and is generally a gray series (the code is a 7 series).
Step S102:
and selecting an interval with the development degree and the property stability meeting the preset requirements in the research area, wherein the distance between the interval and the volcanic rock interval is within the threshold range, and taking the interval as a standard layer. The well logging response of the section is taken as a reference to carry out standardization, so that a good effect can be obtained.
And (3) carrying out standardization processing on the logging curves of the natural Gamma (GR), the deep lateral Resistance (RT), the acoustic wave (AC), the Density (DEN) and the neutron (CN) by adopting a trend surface analysis method, and constructing a quadratic trend function to obtain a standardized curve.
Step S103:
normalization processing is carried out on the standardized curves of natural Gamma (GR), deep lateral Resistance (RT), sound wave (AC), Density (DEN) and neutrons (CN) so as to reduce the influence of different interval values measured by different well logging series on later analysis research.
And carrying out curve reconstruction on the curve subjected to the normalization treatment, wherein the reconstructed curve is as follows:
X＝RT/RT max +[(DEN/DEN max )·(GR/GR max )]/[(AC/AC max )·(CN/CN max )]；(1)
wherein, X is a reconstructed curve for identifying the favorable reservoir of the eruption rock, GR is natural gamma, RT is deep lateral resistance, AC is sound wave, CN is neutron, DEN is density, the parameter with subscript max represents the maximum value of the parameter, and the parameter without subscript is the corresponding standardized curve measured value.
Step S104:
and determining a volcanic rock base value and a surrounding rock base value on the reconstruction curve, and determining a favorable reservoir development section of the eruption rock according to the volcanic rock base value and the surrounding rock base value.
Firstly, on a reconstructed curve X, determining a volcanic rock base value K 1 And surrounding rock base value K 2 Wherein, in the step (A),
wherein, X i Is X max To (X) max -1) values of X, n being a number, X max Is the maximum value of the reconstruction curve;
wherein, X' i Is X min To (X) min +1) X, n is the number, X min To reconstruct the musicThe minimum value of the line;
the volcanic rock base value K 1 With surrounding rock base value K 2 The interval of (a) serves as a favorable reservoir development segment of the eruption rock.
Specifically, on a reconstruction curve X, from top to bottom, the change from the surrounding rock to the rhyoid rock, namely the change from the surrounding rock matrix value to the rhyoid rock matrix value is gradual, the change interval is an upper weathering leaching zone of the rhyoid rock, the erosion pores are developed, the physical properties are good, the linear characteristic of y-kx + b is shown on the X curve, and the interval is a favorable reservoir development section on the upper part of the rhyoid rock.
From top to bottom, the change from the rhyolite to the surrounding rock, namely from the rhyolite matrix value to the surrounding rock matrix value is sudden, the change interval is the lower explosive crack development zone of the rhyolite, the X curve shows a relatively flat appearance, and the numerical value is (X is in the range of (X is the maximum) X curve max +X min ) And 2, the interval is the favorable reservoir development section at the upper part of the rhyolite.
Step S105:
and performing rock debris observation according to rock debris data in the drilling process, performing a fluorescence experiment to determine the oil-gas content, and performing processing analysis and reconstruction according to the oil-gas content and gas measurement data to obtain a favorable oil-gas development section.
Wherein, the formula used for processing, analyzing and reconstructing according to the oil-gas-containing property and gas measurement data is as follows:
Y＝2·(T+C1+C2+C3+IC4+NC4)/(T max +C1 max +C2 max +C3 max +IC4 max +NC4 max )；(4)
wherein, Y is a reconstruction curve, T is the sum of gaseous substances separated from the drilling fluid, C1 is methane, C2 is ethane, C3 is propane, IC4 is isobutane, NC4 is n-butane, the parameter with subscript max represents the maximum gas content, and the parameter without subscript is the gas content obtained by processing and analyzing according to the oil-gas-containing property and gas measurement data; the gaseous hydrocarbon content can be determined by chromatography, typically in%.
And selecting a part larger than a set threshold value on the reconstruction curve Y as a favorable oil and gas development section. The set threshold value can be 0.1, namely, the part with the Y value larger than 0.1 is the part with active oil and gas, and is a favorable oil and gas development section.
Step S106:
and obtaining the favorable reservoir identification result of the eruption rock according to the favorable reservoir development section and the favorable oil and gas development section.
It should be noted that although the operations of the method of the present invention have been described in the above embodiments and the accompanying drawings in a particular order, this does not require or imply that these operations must be performed in this particular order, or that all of the operations shown must be performed, to achieve the desired results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions.
For a clearer explanation of the advantageous reservoir identification method of the above-mentioned eruption rock, a specific example is described below, but it should be noted that the example is only for better illustration of the present invention and should not be construed as an undue limitation thereof.
Taking a volcanic oil reservoir in a certain block of the Liaohe oil field as an example, in the oil reservoir, a eruption rock oil reservoir is widely developed, but because conditions are limited, the whole work area has no three-dimensional seismic data, and only has conventional logging data, logging data and drilling data. Under the condition, the favorable reservoir identification method of the eruption rock can be used for identifying the favorable reservoir aiming at the eruption rock on the basis of rock debris, logging information and logging information, particularly the favorable reservoir of the rhyolite, and the specific flow is as follows:
step S1, identifying rock debris, determining the type and the interval of the volcanic rock:
and selecting a rock debris sample according to rock debris information returned in the drilling process and combining the geological condition of the area and the adjacent well information.
Performing slice identification analysis on the rock debris sample to determine that the main component of the sample is SiO 2 The content is more than 65%, the speckles are quartz, albite and mica, and the matrix is mostly in a FeiFeI structure and a cryptocrystalline structure; the structural structure has a spot-shaped structure, is finally named as the type of the rhyolite, and determines the rhyolite hairThe birth control layer is 1835 m-1880 m.
And observing the colors of rock debris of the development layer section of the rhyolite and the surrounding rock sections of 50-100m above and below the development layer section of the rhyolite, analyzing the color change characteristics of the rock debris, and determining the color change node depth of the rock debris. Wherein, the color of the surrounding rock is found to be gray when the number of 1835m is larger than that of the surrounding rock, and the code is 7; below 1835m is the natural color of the rhyoid, the color is gray green, the code is 6.7, and all the natural colors of the rhyoid are downward to 1880 m; the color below 1880m is changed into dark black, the code is +8, because the rhyolitic rock is directly covered on the surrounding rock below after being sprayed out, the surrounding rock at the lower part is baked at high temperature, and therefore, the color is dark black. And gradually transition downwards to the natural color of the surrounding rock, which is generally a gray series (the code is 7 series). The color-changing interval is generally comparable to the results of the chip slice identification, which can be combined with comparative analysis.
Step S2, logging and identifying, determining favorable reservoir development sections:
step S21, selecting a standard layer, wherein the selection is based on the principle that the set of stratum is relatively developed and stable in property in all wells in the whole area; and the layer is closer to the development destination layer. Therefore, the section of logging response is taken as a reference for standardization, so that a good effect can be obtained.
A trend surface analysis method is adopted as a standardization processing method, well logging curves such as natural Gamma (GR), deep lateral Resistance (RT), sound wave (AC), Density (DEN), neutron (CN) and the like are standardized respectively, and a quadratic trend function is constructed. For example, referring to fig. 2A and fig. 2B, schematic diagrams before and after GR curves are normalized according to an embodiment of the present invention, respectively.
Step S22, after curve normalization, normalization processing is performed on the normalized curves of natural Gamma (GR), deep lateral Resistance (RT), Acoustic (AC), Density (DEN), and neutrons (CN), so as to reduce the influence of different interval values measured by different well logging series on later analysis research.
Curve reconstruction is done on the basis of normalization of the individual curves, as in the aforementioned equation (1).
And step S23, determining the volcanic rock base value and the surrounding rock base value by using the formulas (2) and (3).
Step S24, determining the favorable reservoir development section of the volcanic rock:
on a reconstruction curve X, from top to bottom, the change from surrounding rock to volcanic rock, namely from a surrounding rock base value to a volcanic rock base value is gradual, a change interval (1838.5m-1843m) is an upper weathering leaching zone of the volcanic rock, the erosion pore development is realized, the physical property is good, a linear characteristic that y is 0.0428X +1.4758 is shown on an X curve, and the interval is a favorable reservoir development section on the upper part of the volcanic rock.
From top to bottom, from volcanic to surrounding rock, namely, from volcanic foundation value to a foundation value platform, the X curve shows a relatively gentle step, the value is (Xmax + Xmin)/2 is 2.6, the change interval (1872.1-1880.2m) is a crack development zone at the lower part of the volcanic, the interval is a favorable reservoir development section at the upper part of the volcanic, and then the change interval gradually falls to the surrounding rock foundation value downwards.
Step S3, logging identification, determining favorable oil and gas development sections:
and (3) observing rock debris obtained by drilling, simultaneously carrying out a fluorescence experiment to preliminarily determine the oil-gas-containing property, and simultaneously processing, analyzing and reconstructing gas measurement data, wherein the formula (4) is shown.
Referring to fig. 3, a schematic diagram of an advantageous reservoir and advantageous hydrocarbon-bearing formation screening according to an embodiment of the present invention is shown. As shown in FIG. 3, the part with the Y value larger than 0.1 is the part with active oil and gas, i.e. the favorable oil and gas development section. As can be seen from FIG. 3, the favorable reservoir and favorable hydrocarbon-bearing stratum are a well section of 1838.5m-1843m and a well section of 1872.1-1880.2m, and the well section and the favorable development section of the reservoir are mutually verified.
Therefore, based on the fact that the oil and gas display active sections are 1838.5m-1843m well sections and 1872.1-1880.2m well sections, the two intervals can be directly opened to carry out production development when the lower perforation is put into operation, and effective data support is provided for oil and gas exploration and development of the eruptive rock reservoir.
Having described the method of an exemplary embodiment of the present invention, next, an advantageous reservoir identification system for eruption rock of an exemplary embodiment of the present invention is described with reference to fig. 4.
The implementation of the favorable reservoir identification system for the eruption rock can be referred to the implementation of the method, and repeated details are omitted. The term "module" or "unit" used hereinafter may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
Based on the same inventive concept, the invention also provides a favorable reservoir identification system for eruption rocks, as shown in fig. 4, the system comprises:
the sample analysis module 410 is used for acquiring rock debris information in a drilling process, selecting a rock debris sample according to the rock debris information, identifying and analyzing the rock debris sample to obtain a rock debris sample of eruption rock, and determining a corresponding volcanic rock interval;
the well logging curve processing module 420 is configured to select a standard layer according to the volcanic rock interval, and perform standardization processing on a well logging curve of the standard layer by using a trend surface analysis method to obtain a standardized curve;
a curve reconstruction module 430, configured to perform curve reconstruction according to the normalized curve;
the favorable reservoir development section analysis module 440 is used for determining a volcanic rock base value and a surrounding rock base value on the reconstruction curve and determining a favorable reservoir development section of the eruption rock according to the volcanic rock base value and the surrounding rock base value;
the favorable oil and gas development section analysis module 450 is used for performing rock debris observation on rock debris data in a drilling process, performing a fluorescence experiment to determine the oil and gas content, and performing processing analysis and reconstruction according to the oil and gas content and gas measurement data to obtain a favorable oil and gas development section;
and the result processing module 460 is used for obtaining the favorable reservoir identification result of the eruption rock according to the favorable reservoir development section and the favorable oil and gas development section.
It should be noted that although several modules of the advantageous reservoir identification system for eruption rock are mentioned in the above detailed description, such partitioning is merely exemplary and not mandatory. Indeed, the features and functionality of two or more of the modules described above may be embodied in one module according to embodiments of the invention. Conversely, the features and functions of one module described above may be further divided into embodiments by a plurality of modules.
Based on the aforementioned inventive concept, as shown in fig. 5, the present invention further proposes a computer device 500, comprising a memory 510, a processor 520 and a computer program 530 stored on the memory 510 and executable on the processor 520, wherein the processor 520 executes the computer program 530 to implement the aforementioned advantageous reservoir identification method for eruptive rocks.
Based on the aforementioned inventive concept, the present invention proposes a computer-readable storage medium having stored thereon a computer program which, when being executed by a processor, implements the aforementioned method of favorable reservoir identification of a eruptive rock.
The favorable reservoir stratum identification method and system for the eruption rock utilize methods such as rock debris identification, well logging identification and gas logging curve identification to identify the favorable reservoir stratum of the oil-gas reservoir of the eruption rock, the identification result has better accuracy and effectiveness, important geological basis can be provided for subsequent determination of a perforation well section, and the method and system have important practical significance for oil-gas exploration and development of the oil reservoir of the eruption rock.
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 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.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still make modifications or changes to the embodiments described in the foregoing embodiments, or make equivalent substitutions for some features, within the scope of the disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (11)
1. A method of identifying a favorable reservoir for a erupted rock, the method comprising:
obtaining rock debris information in a drilling process, selecting a rock debris sample according to the rock debris information, identifying and analyzing the rock debris sample to obtain a rock debris sample of eruption rock, and determining a corresponding volcanic rock stratum section;
selecting a standard layer according to the volcanic rock layer section, and standardizing the logging curve of the standard layer by adopting a trend surface analysis method to obtain a standardized curve;
performing curve reconstruction according to the standardized curve;
determining a volcanic rock base value and a surrounding rock base value on the reconstruction curve, and determining a favorable reservoir development section of the eruption rock according to the volcanic rock base value and the surrounding rock base value;
performing rock debris observation on rock debris data in the drilling process, performing a fluorescence experiment to determine the oil-gas content, and performing processing analysis and reconstruction according to the oil-gas content and the gas measurement data to obtain a favorable oil-gas development section;
and obtaining the favorable reservoir identification result of the eruption rock according to the favorable reservoir development section and the favorable oil and gas development section.
2. The favorable reservoir identification method for the eruption rock as claimed in claim 1, wherein the steps of obtaining rock debris information in a drilling process, selecting a rock debris sample according to the rock debris information, performing identification analysis on the rock debris sample to obtain a rock debris sample of the eruption rock, and determining a corresponding volcanic rock interval comprise:
selecting a rock debris sample according to rock debris information in a drilling process by combining the regional geological condition and adjacent well information;
and performing slice identification analysis on the rock debris sample, determining the components and the structural structure of the sample, obtaining the rock debris sample of the eruption rock, and determining the corresponding volcanic rock stratum section.
3. A favorable reservoir identification method for eruption rock as claimed in claim 1, wherein selecting a standard layer from said volcanic rock interval comprises:
and selecting an interval with the development degree and the property stability meeting preset requirements and the distance between the interval and the volcanic rock interval within a threshold range in the research area as a standard layer.
4. A method of identifying favorable reservoirs for eruption rock as claimed in claim 1, wherein said normalizing log of said standard zone using a trend surface analysis method to obtain a normalized curve comprises:
and (3) carrying out standardization processing on the logging curves of natural gamma, deep lateral resistance, sound wave, density and neutrons by adopting a trend surface analysis method to obtain a standardized curve.
5. A method of favorable reservoir identification of a eruptive rock according to claim 1, further comprising:
and carrying out normalization processing on the normalized curves of natural gamma, deep lateral resistance, sound wave, density and neutron.
6. Method for the identification of a favorable reservoir for eruption rock according to claim 5, characterized in that the curve reconstruction from said standardized curve comprises:
and carrying out curve reconstruction on the curve subjected to the normalization treatment, wherein the reconstructed curve is as follows:
X＝RT/RT max +[(DEN/DEN max )·(GR/GR max )]/[(AC/AC max )·(CN/CN max )]；
wherein, X is a reconstructed curve for identifying the favorable reservoir of the eruption rock, GR is natural gamma, RT is deep lateral resistance, AC is sound wave, CN is neutron, DEN is density, the parameter with subscript max represents the maximum value of the parameter, and the parameter without subscript is the corresponding standardized curve measured value.
7. The method for identifying a favorable reservoir of eruption rock as claimed in claim 6, wherein determining a volcanic rock base value and a surrounding rock base value on a reconstruction curve, and determining a favorable reservoir development section of the eruption rock according to the volcanic rock base value and the surrounding rock base value comprises:
determining a volcanic rock base value K on the reconstruction curve X 1 And surrounding rock base value K 2 Wherein, in the step (A),
wherein, X i Is X max To (X) max -1) values of X, n being a number, X max Is the maximum value of the reconstruction curve;
wherein, X' i Is X min To (X) min +1) X, n is the number, X min The minimum of the reconstructed curve.
8. The favorable reservoir identification method of eruption rock of claim 1, wherein rock cuttings observation and fluorescence experiment determination of oil-gas content are performed according to rock cuttings data in a drilling process, and processing analysis and reconstruction are performed according to the oil-gas content and gas measurement data to obtain a favorable oil-gas development section, comprising:
the formula adopted for processing, analyzing and reconstructing the oil-gas-containing data and the gas measurement data is as follows:
Y＝2·(T+C1+C2+C3+IC4+NC4)/(T max +C1 max +C2 max +C3 max +IC4 max +NC4 max )；
wherein, Y is a reconstruction curve, T is the sum of gaseous substances separated from the drilling fluid, C1 is methane, C2 is ethane, C3 is propane, IC4 is isobutane, NC4 is n-butane, the parameter with subscript max represents the maximum gas content, and the parameter without subscript is the gas content obtained by processing and analyzing according to the oil-gas-containing property and gas measurement data;
and selecting a part larger than a set threshold value on the reconstruction curve Y as a favorable oil and gas development section.
9. A favorable reservoir identification system for erupted rock, the system comprising:
the sample analysis module is used for acquiring rock debris information in the drilling process, selecting a rock debris sample according to the rock debris information, identifying and analyzing the rock debris sample to obtain a rock debris sample of the eruptive rock, and determining a corresponding volcanic rock interval;
the well logging curve processing module is used for selecting a standard layer according to the volcanic rock stratum section and standardizing the well logging curve of the standard layer by adopting a trend surface analysis method to obtain a standardized curve;
the curve reconstruction module is used for reconstructing a curve according to the standardized curve;
the favorable reservoir development section analysis module is used for determining a volcanic rock base value and a surrounding rock base value on the reconstruction curve and determining a favorable reservoir development section of the eruption rock according to the volcanic rock base value and the surrounding rock base value;
the favorable oil and gas development section analysis module is used for performing rock debris observation on rock debris data in a drilling process, performing a fluorescence experiment to determine the oil and gas content, and performing processing analysis and reconstruction according to the oil and gas content and gas measurement data to obtain a favorable oil and gas development section;
and the result processing module is used for obtaining the favorable reservoir identification result of the eruption rock according to the favorable reservoir development section and the favorable oil and gas development section.
10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any one of claims 1 to 8 when executing the computer program.
11. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program which, when executed by a processor, implements the method of any one of claims 1 to 8.
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| CN102373923A (en) * | 2010-08-20 | 2012-03-14 | 中国石油天然气股份有限公司 | Reservoir stratum identification method |
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| US20180246254A1 (en) * | 2015-11-02 | 2018-08-30 | Petrochina Company Limited | Method of acquiring rock component content of stratum |
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| CN102373923A (en) * | 2010-08-20 | 2012-03-14 | 中国石油天然气股份有限公司 | Reservoir stratum identification method |
| CN103616731A (en) * | 2013-11-19 | 2014-03-05 | 中国石油天然气股份有限公司 | Altered volcano rock effective reservoir determination method ad device in oil-gas exploration |
| CN103993871A (en) * | 2014-05-08 | 2014-08-20 | 中国石油化工股份有限公司 | Method and device for processing well logging information of thin interbed stratums in standardization mode |
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