Layer selection and well spacing method for improving drilling rate of interlayer type shale oil

Abstract

The invention belongs to the technical field of oilfield development, and particularly relates to a layer selection and well spacing method for improving the drilling rate of interlayer type shale oil. The method comprises the following steps: establishing a regional fine isochronous stratigraphic contrast framework, establishing a reservoir sedimentary microfacies logging interpretation template, sketching a reservoir distribution plane graph under the control of each isochronous stratigraphic contrast framework, and establishing a sedimentary boundary identification template matched with regional earthquake and logging interpretation; the method comprises the following steps of: establishing a reservoir three-dimensional stratum-structure model of a single-layer level, establishing a three-dimensional distribution model of reservoirs with different deposition causes, optimizing a shale oil large platform well site position, and optimizing the direction and the length of a horizontal well according to the size of a sand body and a dominant distribution direction, so as to establish a reservoir three-dimensional stratum-structure model of the single-layer level and the reservoir three-dimensional stratum-structure model of the single-layer level; on the premise that the maximum reserve utilization degree is achieved, the drilling rate of the interlayer type shale oil horizontal well is increased, and a good field implementation effect is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of oilfield development, and in particular relates to a layer selection and well arrangement method for improving the drilling rate of interlayer shale oil. Background Art

[0002] China has abundant continental shale oil resources, with technically recoverable resources of approximately 44.8×10 8 t, second only to the United States and Russia, with resources far greater than conventional oil resources, and is an important strategic successor to China's crude oil reserves and production. The oil layer drilling rate is the main factor affecting the single well production of continental shale oil horizontal wells. Interlayer shale oil represented by the Ordos Basin generally adopts a large platform deployment and development method to achieve the goal of one-time target deployment and overall mobilization. Continental interlayer shale oil has formed a complex source-reservoir combination under the supply of multiple types of sources such as terrestrial, endogenous and volcanic activities. It has the characteristics of vertical multi-sweet spot development, rapid lateral changes and small distribution scale. With the continuous deepening of shale oil development, interlayer shale oil reservoirs are becoming more and more complex.

[0003] At present, the deployment of interlayer shale oil is mainly based on the large-platform well layout method with fixed horizontal well orientation (vertical principal stress) and without considering the genesis and distribution characteristics of underground sand bodies. As a result, large platforms generally have problems such as unstable horizontal well drilling rate and ineffective utilization of gold reservoirs in the pre-target area. How to effectively improve the horizontal well drilling rate through high-quality integrated well layout has become a technical problem that needs to be solved urgently. Summary of the invention

[0004] The present invention provides a layer selection and well layout method for improving the drilling rate of interlayer shale oil. Its purpose is to provide a layer selection and well layout method for effectively improving the drilling rate of interlayer shale oil horizontal wells under the premise of achieving maximum reserve utilization.

[0005] To achieve the above object, the technical solution adopted by the present invention is: A layer selection and well arrangement method for improving the drilling rate of interlayer shale oil comprises the following steps: Step 1: Establish a regional fine isochronous stratigraphic comparison framework; Step 2: Establish a reservoir sedimentary microfacies logging interpretation template and draw a reservoir distribution plan under the control of each framework for isochronous stratigraphic comparison; Step 3: Establish a sedimentary boundary recognition template that matches the regional seismic and well logging interpretations, and correct the reservoir planar distribution characteristics and vertical superposition relationship; Step 4: Establishing a three-dimensional stratigraphic-structural model of the reservoir at the single-layer level; Step 5: Establish a three-dimensional distribution model of reservoirs of different sedimentary origins and obtain three-dimensional spatial quantitative parameters of reservoirs of different origins; Step 6: According to the three-dimensional quantitative parameters of reservoirs of different genesis, optimize the location of the shale oil platform well site, optimize the horizontal well orientation, and select the target layer for drilling.

[0006] The method for establishing a regional fine isochronous stratigraphic comparison framework in the step 1 is to establish the main lines of vertical and horizontal skeleton comparison sections around the area where interlayer shale oil reservoirs are dominantly developed; use the seismic wave peak phase axis to indicate stable and continuous high-gamma mudstone, and the stable high-gamma mudstone that is simultaneously stably developed on the well logging to perform well-seismic calibration to establish a fine isochronous stratigraphic framework.

[0007] The method for establishing a reservoir sedimentary microfacies logging interpretation template in the step 2 and outlining a reservoir distribution plan under the control of each grid for isochronous stratigraphic comparison is to clarify the lithological characteristics, sedimentary structure, sand body thickness, rhythm, electrical characteristics and sedimentary mechanism microfacies of the main waterway, tributary waterway, lobe body, lobe side edge, landslide body, waterway or lobe deposits developed in the study area through core-logging calibration, and to establish a single sand body depositional genesis logging response plate, and to outline a reservoir distribution plan under the control of each grid for isochronous stratigraphic comparison through single well sand body genesis analysis.

[0008] The method for establishing a sedimentary boundary recognition template matching the regional seismic and well logging interpretation in step 3 is: The first step is to obtain 3D seismic inversion slices and reservoir configuration materials; The second step is to determine the boundary and direction of the reservoir by analyzing the 3D seismic inversion slices and reservoir configuration; The third step is to establish a sedimentary boundary recognition template that matches the regional seismic and well logging interpretations based on step 2.

[0009] The method for establishing a single-layer reservoir three-dimensional stratigraphic-structural model in step 4 is: The first step is to establish the velocity field based on the unified time-depth relationship of the whole area; The second step is to convert the seismic horizon in the time domain into the depth domain; The third step is to establish the top surface model of each reservoir body with the seismic structural surface of the reservoir body top surface as a constraint, and interpolate the layers according to the thickness to establish a three-dimensional stratigraphic-structural model of the reservoir body at the single-layer level.

[0010] The method for establishing the three-dimensional distribution model of reservoirs of different sedimentary origins in the step 5 is as follows: on the basis of the three-dimensional stratigraphic-structural model of the reservoir established in step 4, the interlayer reservoir models of different origins are used as modeling targets, the models are sequentially embedded in the shale background phase model, the top surface microstructures of different reservoirs are read according to the logging single well data, and the bottom surface structure of the reservoir is calculated under the control of the configuration plane and the thickness of the reservoir, so as to obtain the spatial distribution range of the reservoir; and the reservoir is grid-assigned according to the spatial range by using mapping software to obtain the three-dimensional distribution model of reservoirs of different sedimentary origins.

[0011] The drawing software used is direct.

[0012] The three-dimensional spatial quantitative parameters of reservoirs of different genesis in step five include reservoir thickness, length, width, dominant distribution direction, and plane spacing.

[0013] The method for optimizing the location of the shale oil platform well site and selecting the target layer for drilling in the step 6 is to use the three-dimensional distribution model of reservoirs of different sedimentary origin established in step 5 to optimize the location of the shale oil platform well site, optimize the location of the shale oil platform well site and the horizontal well orientation according to the advantageous distribution direction and plane spacing of different reservoirs, and optimize the target layer and the horizontal well length according to the thickness and length of the sand body; specifically as follows: for reservoirs with narrow strip distribution, the well site location is optimized in the middle of the reservoir, and the horizontal well orientation is parallel to the reservoir distribution direction; for reservoirs with two adjacent but not connected planes in a wide distribution range, the well site location is optimized in the middle of the two reservoirs; in the vertical direction, quantitative parameters of different reservoirs are obtained according to the three-dimensional distribution model of reservoirs of the same sedimentary origin, and drilling is selected in the layer with stable distribution along the extension direction of the horizontal well; for layers with unstable distribution, the overall drilling rate is improved by shortening the length of the horizontal well.

[0014] Beneficial effects: 1. The present invention establishes a regional fine isochronous stratigraphic comparison framework, establishes a reservoir sedimentary microfacies logging interpretation template and outlines the reservoir distribution plane map under the control of each isochronous stratigraphic comparison framework, establishes a sedimentary boundary recognition template that matches the regional seismic and logging interpretation, corrects the reservoir plane distribution characteristics and the vertical superposition relationship, establishes a single-layer reservoir three-dimensional stratigraphic-structural model, establishes a three-dimensional distribution model of reservoirs of different sedimentary origins, optimizes the location of the shale oil large platform well site, and optimizes the horizontal well orientation and length according to the size of the sand body and the dominant distribution direction. Under the premise of achieving the maximum reserve utilization, the drilling rate of interlayer shale oil horizontal wells is improved, and good field implementation effects are achieved.

[0015] 2. The present invention has important guiding significance for the efficient development of continental interlayer shale oil in China. By referring to this technology, the drilling rate of interlayer shale oil can be effectively improved, and the reasons for the failure of drilling horizontal wells can also be analyzed in retrospect.

[0016] 3. The oil layer drilling rate of wells deployed using the technical solution of the present invention is generally close to 90%, which is 10% higher than before.

[0017] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a flow chart of the present invention; Figure 2 This is the isochronous stratigraphic framework for well-seismic comparison in the Qingcheng South block in the specific embodiment of the present invention; Figure 3 It is the main water channel interpretation template of sedimentary microfacies logging in the southern block of Qingcheng in the specific embodiment of the present invention; Figure 4 It is a template for interpretation of branch water channels in sedimentary microfacies logging in the southern block of Qingcheng in a specific embodiment of the present invention; Figure 5 It is the main interpretation template of the microfacies logging leaf in the Qingcheng South Block in the specific embodiment of the present invention; Figure 6 It is a template for interpreting the side edge of the leaf in the sedimentary microfacies logging of the Qingcheng South Block in the specific embodiment of the present invention; Figure 7 It is a template for interpretation of landslide body in sedimentary microfacies logging in the southern block of Qingcheng in a specific embodiment of the present invention; Figure 8 It is the channel-to-channel / lobate-to-lobate interpretation template for sedimentary microfacies logging in the southern block of Qingcheng in the specific embodiment of the present invention; Fig. 9 It is a reservoir boundary identification template under well-seismic combined characterization in a specific embodiment of the present invention; Fig.10 It is a schematic diagram of the reservoir boundary identification result under the well-seismic combination characterization in a specific embodiment of the present invention; Fig.11 It is the structural model of the Nanban 15 area of ​​Qingcheng in the specific embodiment of the present invention; Fig.12 A schematic diagram of the spatial distribution of reservoirs of different sedimentary origins shown by the three-dimensional phase-controlled modeling results in a specific embodiment of the present invention; Fig.13 It is a schematic diagram of the optimization results of the orientation and length of the horizontal wells of the experimental platform in a specific embodiment of the present invention; Fig.14 It is a schematic diagram of the optimization of the large platform well site and layer in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Embodiment 1: according to Figure 1 A layer selection and well arrangement method for improving the drilling rate of interlayer shale oil is shown, comprising the following steps: Step 1: Establish a regional fine isochronous stratigraphic comparison framework; Step 2: Establish a reservoir sedimentary microfacies logging interpretation template and draw a reservoir distribution plan under the control of each framework for isochronous stratigraphic comparison; Step 3: Establish a sedimentary boundary recognition template that matches the regional seismic and well logging interpretations, and correct the reservoir planar distribution characteristics and vertical superposition relationship; Step 4: Establishing a three-dimensional stratigraphic-structural model of the reservoir at the single-layer level; Step 5: Establish a three-dimensional distribution model of reservoirs of different sedimentary origins and obtain three-dimensional spatial quantitative parameters of reservoirs of different origins; Step 6: According to the three-dimensional quantitative parameters of reservoirs of different genesis, optimize the location of the shale oil platform well site, optimize the horizontal well orientation, and select the target layer for drilling.

[0022] The present invention improves the drilling rate of interlayer shale oil horizontal wells while achieving the maximum reserve utilization, and achieves better on-site implementation effects.

[0023] Embodiment 2: according to Figure 1The layer selection and well arrangement method for improving the drilling rate of interlayer shale oil shown in the embodiment is different from the embodiment 1 in that: the method of establishing a regional fine isochronous stratigraphic comparison framework in the step 1 is to establish the main lines of vertical and horizontal skeleton comparison sections around the area where the interlayer shale oil reservoir is advantageously developed; the seismic wave peak phase axis indicates stable and continuous high-gamma mudstone, and the stable high-gamma mudstone that is stably developed at the same time on the well logging is used for well-seismic calibration to establish a fine isochronous stratigraphic framework. Avoid the situation where the drilling rate of the designed horizontal well is low due to the phenomenon of layer penetration.

[0024] Furthermore, the method for establishing a reservoir sedimentary microfacies logging interpretation template in the step 2 and outlining a reservoir distribution plan under the control of each grid for isochronous stratigraphic comparison is to clarify the lithological characteristics, sedimentary structure, sand body thickness, rhythm, electrical characteristics and sedimentary mechanism microfacies of the main waterway, tributary waterway, lobe body, lobe side edge, landslide body, waterway or lobe deposits developed in the study area through core-logging calibration, and to establish a single sand body sedimentary genesis logging response plate, and to outline a reservoir distribution plan under the control of each grid for isochronous stratigraphic comparison through single well sand body genesis analysis.

[0025] Furthermore, the method for establishing a sedimentary boundary recognition template matching the regional seismic and well logging interpretation in step 3 is: The first step is to obtain 3D seismic inversion slices and reservoir configuration materials; The second step is to determine the boundary and direction of the reservoir by analyzing the 3D seismic inversion slices and reservoir configuration; The third step is to establish a sedimentary boundary recognition template that matches the regional seismic and well logging interpretations based on step 2.

[0026] In actual use, by establishing a sedimentary boundary recognition template that matches the regional seismic and logging interpretation, the planar distribution characteristics of the reservoir and the vertical superposition relationship are corrected, making the subsequent selection and well layout more accurate.

[0027] Furthermore, the method for establishing a single-layer reservoir three-dimensional stratigraphic-structural model in step 4 is: The first step is to establish the velocity field based on the unified time-depth relationship of the whole area; The second step is to convert the seismic horizon in the time domain into the depth domain; The third step is to establish the top surface model of each reservoir body with the seismic structural surface of the reservoir body top surface as a constraint, and interpolate the layers according to the thickness to establish a three-dimensional stratigraphic-structural model of the reservoir body at the single-layer level.

[0028] Afterwards, based on the established three-dimensional stratigraphic-structural model of the reservoir, interlayer reservoir models of different origins were taken as modeling targets. The models were embedded in the shale background phase model in turn, and the microstructures of the top surfaces of different reservoirs were read according to the logging single well data. Under the control of the configuration plane and the reservoir thickness, the low-surface structure of the reservoir was calculated to obtain the spatial distribution range of the reservoir. The reservoir was gridded according to the spatial range using mapping software to obtain the three-dimensional distribution models of reservoirs of different sedimentary origins.

[0029] The mapping software used is direct. Direct mapping software is a prior art. In specific applications, other mapping software can also be used.

[0030] Furthermore, the three-dimensional spatial quantitative parameters of reservoirs of different origins in step five include reservoir thickness, length, width, dominant distribution direction, and plane spacing.

[0031] Furthermore, in the step six, the method for optimizing the location of the shale oil platform well site and selecting the target layer for drilling is to use the three-dimensional distribution model of reservoirs of different sedimentary origin established in step five to optimize the location of the shale oil platform well site. The specific optimization method is: for reservoirs with narrow strip distribution, the well site location is optimized in the middle of the reservoir, and the horizontal well orientation is parallel to the reservoir distribution direction; for reservoirs with two adjacent but unconnected planes with a wide distribution range, the well site location is optimized in the middle of the two reservoirs to ensure that the pre-target area is an invalid reservoir and reduce the probability of wasting high-quality reserves in the pre-target area; vertically, quantitative parameters of different reservoirs are obtained according to the three-dimensional distribution model of reservoirs of the same sedimentary origin, and drilling is selected in the stable layer distributed along the extension direction of the horizontal well to improve the drilling rate. For unstable layers, the overall drilling rate can be improved by shortening the length of the horizontal well. Fig.14 shown.

[0032] The present invention has important guiding significance for the efficient development of continental interlayer shale oil in China. By referring to this technology, the drilling rate of interlayer shale oil can be effectively improved, and the reasons for the failure of drilling horizontal wells can also be analyzed in retrospect. The oil layer drilling rate of wells deployed using this method is generally close to 90%, which is 10% higher than before.

[0033] Embodiment three: The Qingcheng South Block of the Qingcheng Shale Oil Field is located in the slope break zone and gentle slope transformation area. The interlayer shale oil reservoir changes rapidly. The present invention is used for layer selection and well layout. The specific steps are as follows: 1. Establish a regional fine isochronous stratigraphic correlation framework In the past, the "progradational-nearly equal thickness" stratigraphic comparison could not explain the problem of low sand body encounter rate in the overall horizontal wells along the provenance direction. Obvious progradational seismic reflections are developed in the direction along the provenance, and the wave crest event axis indicates stable and continuous high-gamma mudstone, which has isochronous significance. Through well-seismic comparison, a regional fine isochronous stratigraphic comparison framework was established. Under the progradational stratigraphic framework, two sedimentary systems, the delta and the sublacustrine fan, developed from the edge of the lake basin to the center of the lake basin. The sublacustrine fan system can be further divided into three sub-environments (phase zones) of slope, proximal lake bottom and distal lake bottom. The sedimentary phase zones of different sand groups gradually advance toward the center of the lake (such as Figure 2 ).

[0034] 2. Establishment of reservoir sedimentary microfacies logging interpretation template and sedimentary architecture analysis Through core analysis and field profile observation, it is clear that the sedimentary model of the study area is lobe deposition under the control of gravity flow. It is clear that the main waterway, tributary waterway, lobe body, lobe side edge, landslide body, and inter-channel / inter-lobed sedimentary microfacies are developed in the study area. Rock electrical calibration is performed and a sedimentary microfacies logging interpretation template is established (see the table below and Figure 3-Figure 8 ).

[0035] 3. 3D seismic inversion slice and reservoir configuration analysis sand body boundary characterization Seismic attributes with high correlation with sand thickness are selected for seismic inversion. By combining seismic-well logging-actually drilled horizontal well analysis, a regional single sand body boundary seismic-well logging identification template is established ( Fig. 9 ), and based on this, the sedimentary configuration profile of the deployment area was established ( Fig.10 ).

[0036] 4. Establish a three-dimensional stratigraphic-structural model of the reservoir at the single-layer level.

[0037] Based on the unified time-depth relationship of the whole area, the velocity field is established, the seismic horizon in the time domain is converted into the depth domain, and the structural layer model of the study area is established by combining the seismic interpretation layer and well layer data. The structural surface is adjusted according to the characteristics of the vertical and horizontal well logging curves. On the basis of the structural layer model, the vertical grid is set according to the thickness distribution of each single layer to obtain the structural-stratigraphic model. (such as Fig.11 ) 5. Establish a three-dimensional distribution model of reservoirs with different sedimentary origins On the basis of the three-dimensional stratigraphic-structural model of the reservoir, the interlayer reservoir models of different genesis were taken as the modeling targets. The models were sequentially embedded in the shale background phase model, and the models were post-processed by human-computer interaction to establish the three-dimensional distribution models of reservoirs of different sedimentary genesis ( Fig.12 ).

[0038] 6. Well pattern optimization The 3D phase control modeling method was used to optimize the orientation and length of the horizontal wells on the B platform. Currently, the platform has completed two wells, with an oil layer drilling rate of 90%, which effectively improved the degree of reserve utilization. Fig.13 ) The present invention effectively solves the problem of the rapid lateral changes and small distribution scale of the reservoir affecting the drilling rate of interlayer shale oil, and stabilizes the drilling rate of a single well at more than 88%.

[0039] In the absence of conflicts, technicians in this field can combine the relevant technical features in the above examples according to actual conditions to achieve corresponding technical effects. The specific combinations are not described here one by one.

[0040] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0041] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0042] The above are only preferred embodiments of the present invention. The present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A layer selection and well layout method for improving the drilling rate of interlayer shale oil, characterized by: The steps include: Step 1: Establish a regional fine isochronous stratigraphic comparison framework; Step 2: Establish a reservoir sedimentary microfacies logging interpretation template and draw a reservoir distribution plan under the control of each framework for isochronous stratigraphic comparison; Step 3: Establish a sedimentary boundary recognition template that matches the regional seismic and well logging interpretations, and correct the reservoir planar distribution characteristics and vertical superposition relationship; Step 4: Establishing a three-dimensional stratigraphic-structural model of the reservoir at the single-layer level; Step 5: Establish a three-dimensional distribution model of reservoirs of different sedimentary origins and obtain three-dimensional spatial quantitative parameters of reservoirs of different origins; Step 6: According to the three-dimensional quantitative parameters of reservoirs of different genesis, optimize the location of the shale oil platform well site, optimize the horizontal well orientation, and select the target layer for drilling.

2. A layer selection and well layout method for improving the drilling rate of interlayer shale oil according to claim 1, characterized in that: The method of establishing a regional fine isochronous stratigraphic comparison framework in the step 1 is to establish the main lines of vertical and horizontal skeleton comparison sections around the area where interlayer shale oil reservoirs are dominantly developed; The stable and continuous high-gamma mudstone indicated by the seismic wave crest event axis and the stable high-gamma mudstone stably developed on the well logging are used for well-seismic calibration to establish a fine isochronous stratigraphic framework.

3. A layer selection and well layout method for improving the drilling rate of interlayer shale oil according to claim 1, characterized in that: The method for establishing a reservoir sedimentary microfacies logging interpretation template in the step 2 and outlining a reservoir distribution plan under the control of each grid for isochronous stratigraphic comparison is to clarify the lithological characteristics, sedimentary structure, sand body thickness, rhythm, electrical characteristics and sedimentary mechanism microfacies of the main waterway, tributary waterway, lobe body, lobe side edge, landslide body, waterway or lobe deposits developed in the study area through core-logging calibration, and to establish a single sand body depositional genesis logging response plate, and to outline a reservoir distribution plan under the control of each grid for isochronous stratigraphic comparison through single well sand body genesis analysis.

4. A layer selection and well layout method for improving the drilling rate of interlayer shale oil according to claim 1, characterized in that: The method for establishing a sedimentary boundary recognition template matching the regional seismic and well logging interpretation in step 3 is: The first step is to obtain 3D seismic inversion slices and reservoir configuration materials; The second step is to determine the boundary and direction of the reservoir by analyzing the 3D seismic inversion slices and reservoir configuration; The third step is to establish a sedimentary boundary recognition template that matches the regional seismic and well logging interpretations based on step 2.

5. A layer selection and well layout method for improving the drilling rate of interlayer shale oil as claimed in claim 1, characterized in that: The method for establishing a single-layer reservoir three-dimensional stratigraphic-structural model in step 4 is: The first step is to establish the velocity field based on the unified time-depth relationship of the whole area; The second step is to convert the seismic horizon in the time domain into the depth domain; The third step is to establish the top surface model of each reservoir body with the seismic structural surface of the reservoir body top surface as a constraint, and interpolate the layers according to the thickness to establish a three-dimensional stratigraphic-structural model of the reservoir body at the single-layer level.

6. A layer selection and well layout method for improving the drilling rate of interlayer shale oil according to claim 1, characterized in that: The method for establishing the three-dimensional distribution model of reservoirs of different sedimentary origins in the step 5 is as follows: on the basis of the three-dimensional stratigraphic-structural model of the reservoir established in step 4, the interlayer reservoir models of different origins are used as modeling targets, the models are sequentially embedded in the shale background phase model, the top surface microstructures of different reservoirs are read according to the logging single well data, and the bottom surface structure of the reservoir is calculated under the control of the configuration plane and the thickness of the reservoir, so as to obtain the spatial distribution range of the reservoir; and the reservoir is grid-assigned according to the spatial range by using mapping software to obtain the three-dimensional distribution model of reservoirs of different sedimentary origins.

7. A layer selection and well arrangement method for improving the drilling rate of interlayer shale oil according to claim 6, characterized in that: The drawing software used is direct.

8. A layer selection and well layout method for improving the drilling rate of interlayer shale oil according to claim 1, characterized in that: The three-dimensional spatial quantitative parameters of reservoirs of different genesis in step five include reservoir thickness, length, width, dominant distribution direction, and plane spacing.

9. A layer selection and well layout method for improving the drilling rate of interlayer shale oil according to claim 1, characterized in that: The method for optimizing the location of the shale oil platform well site and selecting the target layer for drilling in the step 6 is to use the three-dimensional distribution model of reservoirs of different sedimentary origin established in step 5 to optimize the location of the shale oil platform well site, optimize the location of the shale oil platform well site and the horizontal well orientation according to the advantageous distribution direction and plane spacing of different reservoirs, and optimize the target layer and the horizontal well length according to the thickness and length of the sand body; specifically as follows: for reservoirs with narrow strip distribution, the well site location is optimized in the middle of the reservoir, and the horizontal well orientation is parallel to the reservoir distribution direction; for reservoirs with two adjacent but not connected planes in a wide distribution range, the well site location is optimized in the middle of the two reservoirs; in the vertical direction, quantitative parameters of different reservoirs are obtained according to the three-dimensional distribution model of reservoirs of the same sedimentary origin, and drilling is selected in the layer with stable distribution along the extension direction of the horizontal well; for layers with unstable distribution, the overall drilling rate is improved by shortening the length of the horizontal well.

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