CN113027444A - Dessert region prediction method and device for river and lake shale oil - Google Patents
Dessert region prediction method and device for river and lake shale oil Download PDFInfo
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Abstract
The invention provides a dessert region prediction method and a dessert region prediction device for river and lake shale oil, which are applied to a dessert prediction system for river and lake shale oil, wherein a geological dessert prediction chart and an engineering dessert prediction chart are respectively drawn according to an optimized geological parameter and an engineering parameter and a corresponding parameter division range, the two charts are overlapped according to the prediction results of the geological dessert prediction chart and the engineering dessert prediction chart, and a dessert region prediction chart integrating geology and engineering is drawn by combining each favorable region parameter range to find out a dessert region meeting the geological and engineering double favorable regions for dessert prediction. The accuracy of dessert region prediction can be improved, one-sidedness of single-factor evaluation is avoided, and production can be guided better.
Description
Technical Field
The invention relates to the field of oil and gas exploration, in particular to a method and a device for predicting a sweet spot of river and lake shale oil.
Background
The term "sweet spot" was first introduced with respect to a reservoir that was difficult to develop, meaning that a small fault in a conventional hydrocarbon reservoir had a better reservoir quality. And then the artificial wetland is used in the coal bed gas, and desserts in the coal bed gas are high-potential gas production areas, have better natural fractures and coal bed thickness and have higher stratum pressure.
Oil gas development operators represented by America, Asia-Pacific region, middle east region and the like adopt a geological engineering integration thought, realize benefit exploration and development of unconventional oil gas such as shale gas and compact oil through multidisciplinary fusion and multi-technology integration application, integrate compact oil geological engineering, and select a ' sweet spot region ' on the basis of ' evaluation and identification of the ' sweet spot region ' (section), which is a primary condition for success of shale gas.
At present, the deep knowledge and research method of the shale oil and gas dessert body is single, factors influencing the yield are extremely complex, various factors can determine the yield change of a well, and the innovative knowledge of the geological dessert and the engineering dessert, including later economic evaluation, can continuously correct the connotation of the dessert body. Therefore, a method for accurately and quantitatively identifying shale oil and gas desserts by utilizing the existing well logging data is needed.
Disclosure of Invention
The invention aims to provide a dessert region prediction method and a dessert region prediction device for river and lake shale oil. The method can avoid the limitation of predicting the sweet spot by single factor and meet the adverse conditions of multi-result and low effect when analyzing the sweet spot unilaterally.
The embodiment of the invention is realized by the following steps:
based on the above purpose, the invention provides a dessert region prediction method for river and lake shale oil, which is applied to a river and lake shale oil dessert prediction system, and comprises the following steps:
obtaining geological parameter information of an area to be predicted, dividing according to geological parameters related to a dessert area and parameter ranges of the geological parameters, and drawing a map of the geological parameters to obtain a geological dessert prediction map;
acquiring engineering parameter information of an area to be predicted, and drawing a chart of engineering parameters according to the engineering parameters related to the dessert area and the parameter range division of each engineering parameter to obtain an engineering dessert prediction chart;
and determining the region of the dessert region on the two plates as the geological-engineering integrated dessert region of the region to be predicted by combining the geological dessert prediction plate and the engineering dessert prediction plate.
In a preferred embodiment of the present invention, the geological parameters related to the sweet spot area include porosity, permeability, and oil-containing thickness, and the parameter range division manner of each geological parameter specifically includes:
most favorable region: the porosity is more than or equal to 8 percent, the permeability is more than or equal to 0.4mD, and the oil-containing thickness is more than or equal to 8 meters;
favorable area: the porosity is more than or equal to 6 percent and less than 8 percent, the permeability is more than or equal to 0.3mD and less than 0.4mD, and the oil-containing thickness is more than or equal to 6 meters and less than 8 meters;
more favorable area: the porosity is more than or equal to 4 percent and less than 6 percent, the permeability is more than or equal to 0.2mD and less than 0.3mD, and the oil-containing thickness is more than or equal to 4 meters and less than 6 meters;
general area: the porosity is more than or equal to 2 percent and less than 4 percent, the permeability is more than or equal to 0.1mD and less than 0.2mD, and the oil-containing thickness is more than or equal to 2 meters and less than 4 meters;
unfavorable region: porosity is less than 2%, permeability is less than 0.1mD, and oil-containing thickness is less than 2 m.
In a preferred embodiment of the present invention, the method for obtaining the geological dessert prediction map by drawing the map of the geological parameters specifically includes:
and dividing the region to be predicted into a most favorable region, a more favorable region, a general region and an unfavorable region according to the parameter range division of the porosity, the permeability and the oil-containing thickness, and taking the most favorable region as a sweet spot region predicted by a geological parameter chart.
In a preferred embodiment of the present invention, the geological parameters related to the sweet spot area include a mineral brittleness index and a mechanical brittleness index, and the parameter range division manner of each engineering parameter specifically includes:
most favorable region: the mineral brittleness index is more than or equal to 47 percent, and the mechanical brittleness index is more than or equal to 35 percent;
favorable area: mineral brittleness index of 46-47%, and mechanical brittleness index of 34-35%;
more favorable area: mineral brittleness index of 45-46% and mechanical brittleness index of 33-34%;
general area: the mineral brittleness index is more than or equal to 44% and less than 45, and the mechanical brittleness index is more than or equal to 32% and less than 33%;
unfavorable region: the index of physical brittleness is less than 44%, and the index of mechanical brittleness is less than 32%.
In a preferred embodiment of the present invention, the method for obtaining the engineering dessert prediction template by drawing the template of the engineering parameters specifically includes:
and dividing the region to be predicted into a most favorable region, a more favorable region, a general region and an unfavorable region according to the parameter range division of the mineral brittleness index and the mechanical brittleness index, and taking the most favorable region as a sweet spot region predicted by an engineering parameter chart.
Based on the above purpose, the present invention also provides a dessert region predicting device for river and lake shale oil, which is applied to a dessert predicting system for river and lake shale oil, and the device comprises:
the geological dessert predicting unit is used for acquiring geological parameter information of an area to be predicted, dividing according to geological parameters related to the dessert area and parameter ranges of the geological parameters, and drawing a map of the geological parameters to obtain a geological dessert predicting map;
the engineering dessert predicting unit is used for acquiring engineering parameter information of the area to be predicted, dividing the engineering parameters according to the engineering parameters related to the dessert area and the parameter range of each engineering parameter, and drawing a chart of the engineering parameters to obtain an engineering dessert predicting chart;
and the comprehensive dessert predicting unit is used for combining the geological dessert predicting plate and the engineering dessert predicting plate, and determining the region of the dessert region on the two plates as the geological-engineering comprehensive dessert region of the region to be predicted.
In a preferred embodiment of the present invention, the geological parameters related to the sweet spot area include porosity, permeability, and oil-containing thickness, and the parameter range division manner of each geological parameter specifically includes:
most favorable region: the porosity is more than or equal to 8 percent, the permeability is more than or equal to 0.4mD, and the oil-containing thickness is more than or equal to 8 meters;
favorable area: the porosity is more than or equal to 6 percent and less than 8 percent, the permeability is more than or equal to 0.3mD and less than 0.4mD, and the oil-containing thickness is more than or equal to 6 meters and less than 8 meters;
more favorable area: the porosity is more than or equal to 4 percent and less than 6 percent, the permeability is more than or equal to 0.2mD and less than 0.3mD, and the oil-containing thickness is more than or equal to 4 meters and less than 6 meters;
general area: the porosity is more than or equal to 2 percent and less than 4 percent, the permeability is more than or equal to 0.1mD and less than 0.2mD, and the oil-containing thickness is more than or equal to 2 meters and less than 4 meters;
unfavorable region: porosity is less than 2%, permeability is less than 0.1mD, and oil-containing thickness is less than 2 m.
In a preferred embodiment of the present invention, the geological sweet spot prediction unit is specifically configured to:
and dividing the region to be predicted into a most favorable region, a more favorable region, a general region and an unfavorable region according to the parameter range division of the porosity, the permeability and the oil-containing thickness, and taking the most favorable region as a sweet spot region predicted by a geological parameter chart.
In a preferred embodiment of the present invention, the geological parameters related to the sweet spot area include a mineral brittleness index and a mechanical brittleness index, and the parameter range division manner of each engineering parameter specifically includes:
most favorable region: the mineral brittleness index is more than or equal to 47 percent, and the mechanical brittleness index is more than or equal to 35 percent;
favorable area: mineral brittleness index of 46-47%, and mechanical brittleness index of 34-35%;
more favorable area: mineral brittleness index of 45-46% and mechanical brittleness index of 33-34%;
general area: the mineral brittleness index is more than or equal to 44% and less than 45, and the mechanical brittleness index is more than or equal to 32% and less than 33%;
unfavorable region: the index of physical brittleness is less than 44%, and the index of mechanical brittleness is less than 32%.
In a preferred embodiment of the present invention, the engineered sweet spot prediction unit is specifically configured to:
and dividing the region to be predicted into a most favorable region, a more favorable region, a general region and an unfavorable region according to the parameter range division of the mineral brittleness index and the mechanical brittleness index, and taking the most favorable region as a sweet spot region predicted by an engineering parameter chart.
In summary, the invention provides a dessert region prediction method and device for river and lake shale oil, which are applied to a dessert prediction system for river and lake shale oil, the geological dessert prediction chart and the engineering dessert prediction chart are respectively drawn according to the optimized geological parameters, engineering parameters and corresponding parameter partition ranges, then the two charts are overlapped according to the prediction results of the geological dessert prediction chart and the engineering dessert prediction chart, the dessert region prediction chart integrating geology and engineering is drawn by combining the beneficial region parameter ranges, and the dessert region meeting the geological and engineering dual beneficial regions is found out for dessert prediction. The accuracy of dessert region prediction can be improved, one-sidedness of single-factor evaluation is avoided, and production can be guided better.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a flow chart of a method of predicting a sweet spot region of river lake shale oil according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a sweet spot prediction apparatus for river and lake shale oil according to an embodiment of the present invention.
Icon:
a geological sweet spot prediction unit 110; an engineered dessert prediction unit 120; an integrated dessert prediction unit 130.
Detailed Description
Oil gas development operators represented by America, Asia-Pacific region, middle east region and the like adopt a geological engineering integration thought, realize benefit exploration and development of unconventional oil gas such as shale gas and compact oil through multidisciplinary fusion and multi-technology integration application, integrate compact oil geological engineering, and select a ' sweet spot region ' on the basis of ' evaluation and identification of the ' sweet spot region ' (section), which is a primary condition for success of shale gas.
At present, the deep knowledge and research method of the shale oil and gas dessert body is single, factors influencing the yield are extremely complex, various factors can determine the yield change of a well, and the innovative knowledge of the geological dessert and the engineering dessert, including later economic evaluation, can continuously correct the connotation of the dessert body. Therefore, a method for accurately and quantitatively identifying shale oil and gas desserts by utilizing the existing well logging data is needed.
In view of the above, the invention provides a dessert region prediction method and device for river and lake shale oil, which respectively draw a geological dessert prediction chart and an engineering dessert prediction chart according to an optimized geological parameter and an engineering parameter and a corresponding parameter division range, then superpose the two charts according to the prediction results of the geological dessert prediction chart and the engineering dessert prediction chart, draw a dessert region prediction chart integrated with geology and engineering by combining each favorable region parameter range, and find out a dessert region meeting the geological and engineering double favorable regions for dessert prediction. The method can avoid the limitation of predicting the sweet spot by single factor and meet the adverse conditions of multi-result and low effect when analyzing the sweet spot unilaterally.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "top", "bottom", "inside", "outside", and the like refer to orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally used to place products of the present invention, and are used for convenience in describing the present invention and simplifying the description, but do not refer to or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
Examples
Referring to fig. 1, the dessert region prediction method for river and lake shale oil provided by the present invention is applied to a dessert prediction system for river and lake shale oil, and the method includes:
step S101, acquiring geological parameter information of an area to be predicted, dividing according to geological parameters related to a dessert area and parameter ranges of the geological parameters, and drawing a map of the geological parameters to obtain a geological dessert prediction map;
the selection of the geological parameters associated with the sweet spot area, and the division of the parameter ranges corresponding to the geological parameters, typically associated with the area to be predicted or the environment of the study area, may be determined by sorting and analyzing the geological parameters of the study area.
As a preferred form of the invention, the geological parameters associated with the sweet spot zone include porosity, permeability, oil thickness. The geological parameters are preferably porosity, permeability and oil-containing thickness, and the parameters are key parameters for evaluating the storage characteristics and the oil-containing property of the shale oil reservoir respectively. The method for dividing the parameter range of the geological parameter specifically comprises the following steps:
most favorable region: the porosity is more than or equal to 8 percent, the permeability is more than or equal to 0.4mD, and the oil-containing thickness is more than or equal to 8 meters; favorable area: the porosity is more than or equal to 6 percent and less than 8 percent, the permeability is more than or equal to 0.3mD and less than 0.4mD, and the oil-containing thickness is more than or equal to 6 meters and less than 8 meters; more favorable area: the porosity is more than or equal to 4 percent and less than 6 percent, the permeability is more than or equal to 0.2mD and less than 0.3mD, and the oil-containing thickness is more than or equal to 4 meters and less than 6 meters; general area: the porosity is more than or equal to 2 percent and less than 4 percent, the permeability is more than or equal to 0.1mD and less than 0.2mD, and the oil-containing thickness is more than or equal to 2 meters and less than 4 meters; unfavorable region: porosity is less than 2%, permeability is less than 0.1mD, and oil-containing thickness is less than 2 m.
As other modes of the invention, the parameter range division mode of the geological parameters can be flexibly adjusted.
After determining the geological parameters related to the sweet spot area and the corresponding parameter range division, drawing a chart of the corresponding geological parameters according to the obtained geological parameter information of the area to be predicted, and labeling the ranges of the areas on the chart to obtain a geological sweet spot prediction chart, wherein the most favorable area is used as the sweet spot area predicted by the geological parameter chart.
Step S102, acquiring engineering parameter information of an area to be predicted, and drawing a chart of engineering parameters according to the engineering parameters related to the dessert area and the parameter range division of each engineering parameter to obtain an engineering dessert prediction chart;
the engineering sweet-spot prediction plate is manufactured in a manner similar to the geological sweet-spot prediction plate, and the selection of the engineering parameters related to the sweet-spot area and the parameter range division of the corresponding engineering parameters are determined firstly.
As a preferred form of the invention, the geological parameters associated with the sweet spot zone include a mineral brittleness index and a mechanical brittleness index. The two parameters are related to the later fracturing reformation of the shale oil and can be used for evaluating the reformation performance of a shale oil reservoir. Generally, the higher the rock brittleness, the more favorable the formation of a larger reservoir formation area by volume fracturing. Two common methods for calculating the brittleness index are as follows:
wherein E is Young's modulus with unit of 104 MPa; mu is Poisson's ratio and is dimensionless.
In this embodiment, the engineering parameter range division manner specifically includes:
most favorable region: the mineral brittleness index is more than or equal to 47 percent, and the mechanical brittleness index is more than or equal to 35 percent; favorable area: mineral brittleness index of 46-47%, and mechanical brittleness index of 34-35%; more favorable area: mineral brittleness index of 45-46% and mechanical brittleness index of 33-34%; general area: the mineral brittleness index is more than or equal to 44% and less than 45, and the mechanical brittleness index is more than or equal to 32% and less than 33%; unfavorable region: the index of physical brittleness is less than 44%, and the index of mechanical brittleness is less than 32%. As other modes of the invention, the parameter range division mode of the geological parameters can be flexibly adjusted.
After determining the engineering parameters related to the dessert region and the corresponding parameter range division, drawing a chart of the corresponding engineering parameters according to the obtained engineering parameter information of the region to be predicted, and labeling the ranges of the plurality of regions on the chart to obtain an engineering dessert prediction chart, wherein the most favorable region is used as the dessert region predicted by the engineering parameter chart.
And S103, combining the geological dessert prediction plate and the engineering dessert prediction plate, and determining the region which is the dessert region on the two plates as a geological-engineering integrated dessert region of the region to be predicted.
And overlapping the two plates according to the prediction results of the geological dessert prediction plate and the engineering dessert prediction plate, drawing a dessert region prediction plate integrated with geology and engineering by combining the parameter ranges of the beneficial regions, and finding out the region meeting the geological and engineering dual beneficial regions, namely performing dessert prediction on the region of the dessert region on the two plates, wherein the region is the geological-engineering integrated dessert region of the region to be predicted.
Through the two dessert region prediction charts and the corresponding total 5 parameters, the shale oil dessert region can be predicted comprehensively by integrating geological features and engineering characteristics, the one-sidedness of single-factor evaluation is avoided, the accuracy of dessert region prediction can be effectively improved, and production can be guided better.
In summary, the dessert region prediction method for the river and lake shale oil provided by the embodiment of the present invention respectively draws the geological dessert prediction chart and the engineering dessert prediction chart according to the preferred geological parameters and engineering parameters and the corresponding parameter partition ranges, overlaps the two charts according to the prediction results of the geological dessert prediction chart and the engineering dessert prediction chart, and draws the dessert region prediction chart integrated with geological and engineering according to each favorable region parameter range, so as to find out the favorable regions meeting geological and engineering requirements for dessert prediction. The method can avoid the limitation of predicting the sweet spot by single factor and meet the adverse conditions of multi-result and low effect when analyzing the sweet spot unilaterally.
As shown in fig. 2, an embodiment of the present invention further provides a dessert region predicting apparatus for river and lake shale oil, which is applied to a dessert predicting system for river and lake shale oil, and includes:
the geological dessert predicting unit 110 is used for acquiring geological parameter information of an area to be predicted, dividing the geological parameter information according to geological parameters related to the dessert area and parameter ranges of each geological parameter, and drawing a map of the geological parameters to obtain a geological dessert prediction map;
the engineering dessert predicting unit 120 is configured to obtain engineering parameter information of the area to be predicted, divide the parameter ranges of the engineering parameters according to the engineering parameters related to the dessert area and the engineering parameters, and draw a map of the engineering parameters to obtain an engineering dessert prediction map;
and the integrated dessert predicting unit 130 is used for combining the geological dessert predicting plate and the engineering dessert predicting plate, and determining the region of the dessert region on the two plates as the geological-engineering integrated dessert region of the region to be predicted.
The sweet spot region prediction device of the river and lake shale oil provided by the embodiment of the invention is used for realizing the sweet spot region prediction method of the river and lake shale oil, so that the specific implementation mode is the same as the method, and the details are not repeated.
The dessert region prediction method and device of the river and lake shale oil are applied to a river and lake shale oil dessert prediction system, a geological dessert prediction chart and an engineering dessert prediction chart are respectively drawn according to the optimized geological parameters and engineering parameters and the corresponding parameter division ranges, the two charts are overlapped according to the prediction results of the geological dessert prediction chart and the engineering dessert prediction chart, the dessert region prediction chart integrating geology and engineering is drawn in combination with each favorable region parameter range, and dessert prediction meeting the geological and engineering double favorable regions is found out. The accuracy of dessert region prediction can be improved, one-sidedness of single-factor evaluation is avoided, and production can be guided better.
In the embodiments disclosed in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Claims (10)
1. A dessert area prediction method of river and lake shale oil is applied to a river and lake shale oil dessert prediction system and is characterized by comprising the following steps:
obtaining geological parameter information of an area to be predicted, dividing according to geological parameters related to a dessert area and parameter ranges of the geological parameters, and drawing a map of the geological parameters to obtain a geological dessert prediction map;
acquiring engineering parameter information of an area to be predicted, and drawing a chart of engineering parameters according to the engineering parameters related to the dessert area and the parameter range division of each engineering parameter to obtain an engineering dessert prediction chart;
and determining the region of the dessert region on the two plates as the geological-engineering integrated dessert region of the region to be predicted by combining the geological dessert prediction plate and the engineering dessert prediction plate.
2. The method for predicting the sweet spot region of the river lake facies shale oil as claimed in claim 1, wherein the geological parameters related to the sweet spot region include porosity, permeability and oil-containing thickness, and the parameter range division modes of the geological parameters are as follows:
most favorable region: the porosity is more than or equal to 8 percent, the permeability is more than or equal to 0.4mD, and the oil-containing thickness is more than or equal to 8 meters;
favorable area: the porosity is more than or equal to 6 percent and less than 8 percent, the permeability is more than or equal to 0.3mD and less than 0.4mD, and the oil-containing thickness is more than or equal to 6 meters and less than 8 meters;
more favorable area: the porosity is more than or equal to 4 percent and less than 6 percent, the permeability is more than or equal to 0.2mD and less than 0.3mD, and the oil-containing thickness is more than or equal to 4 meters and less than 6 meters;
general area: the porosity is more than or equal to 2 percent and less than 4 percent, the permeability is more than or equal to 0.1mD and less than 0.2mD, and the oil-containing thickness is more than or equal to 2 meters and less than 4 meters;
unfavorable region: porosity is less than 2%, permeability is less than 0.1mD, and oil-containing thickness is less than 2 m.
3. The method for predicting the sweet spot region of the river lake facies shale oil according to claim 2, wherein the method for drawing the plate of the geological parameters to obtain the geological sweet spot prediction plate comprises the following steps:
and dividing the region to be predicted into a most favorable region, a more favorable region, a general region and an unfavorable region according to the parameter range division of the porosity, the permeability and the oil-containing thickness, and taking the most favorable region as a sweet spot region predicted by a geological parameter chart.
4. The method for predicting the sweet spot region of the river lake facies shale oil according to claim 1, wherein the geological parameters related to the sweet spot region comprise a mineral brittleness index and a mechanical brittleness index, and the parameter range division mode of each engineering parameter specifically comprises:
most favorable region: the mineral brittleness index is more than or equal to 47 percent, and the mechanical brittleness index is more than or equal to 35 percent;
favorable area: mineral brittleness index of 46-47%, and mechanical brittleness index of 34-35%;
more favorable area: mineral brittleness index of 45-46% and mechanical brittleness index of 33-34%;
general area: the mineral brittleness index is more than or equal to 44% and less than 45, and the mechanical brittleness index is more than or equal to 32% and less than 33%;
unfavorable region: the index of physical brittleness is less than 44%, and the index of mechanical brittleness is less than 32%.
5. The dessert area predicting method for river and lake shale oil according to claim 4, wherein the method for drawing the engineering parameter plate to obtain the engineering dessert predicting plate comprises the following steps:
and dividing the region to be predicted into a most favorable region, a more favorable region, a general region and an unfavorable region according to the parameter range division of the mineral brittleness index and the mechanical brittleness index, and taking the most favorable region as a sweet spot region predicted by an engineering parameter chart.
6. A dessert region predicting device of river and lake shale oil is applied to a dessert predicting system of the river and lake shale oil, and is characterized by comprising:
the geological dessert predicting unit is used for acquiring geological parameter information of an area to be predicted, dividing according to geological parameters related to the dessert area and parameter ranges of the geological parameters, and drawing a map of the geological parameters to obtain a geological dessert predicting map;
the engineering dessert predicting unit is used for acquiring engineering parameter information of the area to be predicted, dividing the engineering parameters according to the engineering parameters related to the dessert area and the parameter range of each engineering parameter, and drawing a chart of the engineering parameters to obtain an engineering dessert predicting chart;
and the comprehensive dessert predicting unit is used for combining the geological dessert predicting plate and the engineering dessert predicting plate, and determining the region of the dessert region on the two plates as the geological-engineering comprehensive dessert region of the region to be predicted.
7. The device for predicting the sweet spot region of the river lake facies shale oil as claimed in claim 6, wherein the geological parameters related to the sweet spot region comprise porosity, permeability and oil-containing thickness, and the parameter range division modes of the geological parameters are as follows:
most favorable region: the porosity is more than or equal to 8 percent, the permeability is more than or equal to 0.4mD, and the oil-containing thickness is more than or equal to 8 meters;
favorable area: the porosity is more than or equal to 6 percent and less than 8 percent, the permeability is more than or equal to 0.3mD and less than 0.4mD, and the oil-containing thickness is more than or equal to 6 meters and less than 8 meters;
more favorable area: the porosity is more than or equal to 4 percent and less than 6 percent, the permeability is more than or equal to 0.2mD and less than 0.3mD, and the oil-containing thickness is more than or equal to 4 meters and less than 6 meters;
general area: the porosity is more than or equal to 2 percent and less than 4 percent, the permeability is more than or equal to 0.1mD and less than 0.2mD, and the oil-containing thickness is more than or equal to 2 meters and less than 4 meters;
unfavorable region: porosity is less than 2%, permeability is less than 0.1mD, and oil-containing thickness is less than 2 m.
8. The device for predicting a sweet spot of river lake shale oil according to claim 7, wherein the geological sweet spot prediction unit is specifically configured to:
and dividing the region to be predicted into a most favorable region, a more favorable region, a general region and an unfavorable region according to the parameter range division of the porosity, the permeability and the oil-containing thickness, and taking the most favorable region as a sweet spot region predicted by a geological parameter chart.
9. The device for predicting the sweet spot region of the river lake facies shale oil as claimed in claim 6, wherein the geological parameters related to the sweet spot region comprise a mineral brittleness index and a mechanical brittleness index, and the parameter range division mode of each engineering parameter is specifically as follows:
most favorable region: the mineral brittleness index is more than or equal to 47 percent, and the mechanical brittleness index is more than or equal to 35 percent;
favorable area: mineral brittleness index of 46-47%, and mechanical brittleness index of 34-35%;
more favorable area: mineral brittleness index of 45-46% and mechanical brittleness index of 33-34%;
general area: the mineral brittleness index is more than or equal to 44% and less than 45, and the mechanical brittleness index is more than or equal to 32% and less than 33%;
unfavorable region: the index of physical brittleness is less than 44%, and the index of mechanical brittleness is less than 32%.
10. The device for predicting a sweet spot of river lake facies shale oil of claim 9, wherein the engineered sweet spot prediction unit is specifically configured to:
and dividing the region to be predicted into a most favorable region, a more favorable region, a general region and an unfavorable region according to the parameter range division of the mineral brittleness index and the mechanical brittleness index, and taking the most favorable region as a sweet spot region predicted by an engineering parameter chart.
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