Development of multi-set shale oil tight oil reservoir large well group horizontal well 3D visual model
By designing and developing multiple sets of three-dimensional visual models of horizontal wells in large well groups of shale oil tight oil reservoirs, the problem of the difficulty in displaying the trajectory of horizontal wells in large well groups in the formation in existing molds has been solved, achieving an intuitive three-dimensional display effect and helping technicians to formulate efficient production plans.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHAANXI YANCHANG PETROLEUM GRP
- Filing Date
- 2025-05-08
- Publication Date
- 2026-05-29
AI Technical Summary
Existing teaching models cannot intuitively demonstrate the trajectory of horizontal wells in large well groups through the formation and their contact with high-angle fractures. This is especially true when developing three-dimensional reservoirs with multiple sets of shale oil tight oil layers and high-angle fractures, where two-dimensional maps are difficult to understand.
The design developed multiple sets of three-dimensional visual models of horizontal wells in large well groups of shale oil tight oil reservoirs, including simulated horizontal wells, simulated oil reservoir groups, and simulated surface loess layers. The simulated wellhead was made using transparent materials and copper wire to show the trajectory of the horizontal well in the formation and its contact with high-angle fractures.
It provides an intuitive and vivid demonstration of the trajectory of horizontal wells in large well groups through the formation and their contact with high-angle fractures, facilitating understanding and the development of high-quality and efficient production plans, and providing a good teaching model for technical personnel.
Smart Images
Figure CN224304286U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of teaching mold technology, specifically to the development of three-dimensional visual models of horizontal wells in large well groups of shale oil tight oil reservoirs. Background Technology
[0002] In low-permeability gas reservoirs, horizontal wells can improve the contact area of a single well and reduce the number of wells required to develop the reservoir. After drilling a horizontal well, staged or selective fracturing along the horizontal section can be performed, which can better improve oil production. In naturally high-angle fractured reservoirs, horizontal wells can improve the fracture encounter rate, connect fractures, and drain oil from them.
[0003] Therefore, for high-angle fractured shale oil reservoirs with multiple tight oil layers, large-scale horizontal well technology is an effective means to reduce investment and increase single-well production and recovery rate. Taking the Ordos Basin as an example, the basin is dominated by loess plateau landforms, with small well site areas. Large-scale horizontal well technology can greatly reduce the land area occupied by horizontal well platforms, significantly increase oil production capacity, and achieve the goal of developing the most reserves with the least land use.
[0004] However, current published literature shows that the descriptions of how the horizontal wells of the Dajing Group traverse and connect high-angle fractures in formations with multiple shale oil tight oil layers are rather abstract. The diagrams showing their three-dimensional development are all two-dimensional, making it difficult to understand the function of the horizontal wells of the Dajing Group in developing high-angle fracture reservoirs with multiple shale oil tight oil layers, improving the degree of reserve utilization and single-well production. Utility Model Content
[0005] To address the aforementioned issues, this invention provides a three-dimensional visual model of horizontal wells in large well groups with multiple shale oil tight oil formations. This model solves the problem that existing teaching models cannot directly observe the movement of horizontal wells through formations. It can intuitively and vividly demonstrate the movement trajectory of horizontal wells through formations and their contact with high-angle fractures. It also allows observation of the vertical position of the horizontal well sections within formations with multiple shale oil tight oil formations.
[0006] This utility model develops multiple sets of three-dimensional visual models of horizontal well groups in shale oil tight oil reservoirs, including multiple simulated horizontal well groups and simulated oil reservoir groups. The simulated oil reservoir groups are stacked from top to bottom, and a simulated surface loess layer is set above the topmost simulated oil reservoir layer. A simulated well frame is set on the simulated surface loess layer.
[0007] The simulated horizontal well group includes multiple simulated horizontal wells. One end of each simulated horizontal well emerges from the simulated loess layer on the ground and is located at the bottom of the derrick. The other end of each simulated horizontal well is respectively set in the simulated oil layer group. The ends of the simulated horizontal wells in the same simulated horizontal well group that are far from the simulated derrick are all located in the same simulated oil layer group.
[0008] The oil layer group simulation layer includes three oil layer simulation layers that are stacked sequentially from top to bottom: the upper oil layer simulation layer, the middle oil layer simulation layer, and the lower oil layer simulation layer.
[0009] The simulated horizontal well passes through the upper oil layer simulation layer, enters the middle oil layer simulation layer, and travels horizontally within the middle oil layer simulation layer. The portion of the simulated horizontal well extending into the oil layer group simulation layer is evenly distributed with vertically arranged simulated fractures. All simulated fractures are located in the middle oil layer simulation layer, and the two ends of the simulated fractures extend into the upper oil layer simulation layer and the lower oil layer simulation layer, respectively.
[0010] Preferably, there are three simulated oil layer groups. In the bottommost simulated oil layer group, two simulated horizontal well groups are arranged, and the two horizontal well groups are arranged in opposite directions in the simulated oil layer group.
[0011] In the other two simulated oil layer groups, a simulated horizontal well is set up in each of the simulated layers, and the horizontal well groups in the simulated layers of the above two oil layer groups travel in opposite directions.
[0012] Preferably, each simulated horizontal well group has 5 simulated horizontal wells, and the simulated horizontal wells are distributed in a matrix at one end facing the simulated derrick.
[0013] Preferably, in the same group of simulated horizontal wells, one end of the simulated horizontal well facing the simulated derrick is arranged along the Y-axis in the simulated loess layer on the ground, and the other end is arranged along the X-axis in each simulated oil layer group.
[0014] Preferably, the upper oil layer simulation layer, the middle oil layer simulation layer, and the lower oil layer simulation layer are all made of transparent gel.
[0015] Preferably, it also includes a transparent box, and the simulated oil layer group is filled and disposed in the transparent box.
[0016] Preferably, a separator made of colorless and transparent gel is filled between adjacent simulated oil layer groups.
[0017] This utility model has a simple structure, is easy to manufacture, has a good display effect, and is easy to understand. It solves the problem that existing teaching models cannot directly observe the movement of horizontal wells in large well groups through the formation. It can intuitively and vividly show the movement trajectory of horizontal wells in large well groups through the formation and their contact with high-angle fractures. It can observe the vertical position of the horizontal well section in the formation with multiple shale oil and tight oil reservoirs. It can provide a very good teaching model for technicians who are researching and developing shale oil and tight oil reservoirs. It is a three-dimensional visual model that can help technicians formulate production plans for horizontal well groups in a high-quality and efficient manner. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the present invention.
[0019] Figure 2 for Figure 1 A top view of the simulated horizontal wellhead layout.
[0020] Figure labels: 1-Simulated oil layer group, 2-Simulated horizontal well, 3-Simulated surface loess layer, 4-Simulated derrick, 5-Upper oil layer simulation layer, 6-Middle oil layer simulation layer, 7-Lower oil layer simulation layer, 8-Simulated fracture. Detailed Implementation
[0021] The present invention will be described below with reference to the accompanying drawings.
[0022] See appendix Figure 1 This utility model develops a three-dimensional visual model of horizontal wells in multiple sets of shale oil tight oil reservoirs, including multiple simulated horizontal wells 2 groups and oil reservoir group simulated layer 1. The oil reservoir group simulated layer 1 is stacked from top to bottom. Above the topmost oil reservoir simulated layer is a ground loess layer simulated layer 3. A simulated well frame 4 is set on the ground loess layer simulated layer 3.
[0023] The simulated horizontal well group 2 includes multiple simulated horizontal wells 2. One end of each simulated horizontal well 2 extends from the ground loess simulation layer and is located at the bottom of the derrick. The other end of each simulated horizontal well 2 is respectively set in the oil layer group simulation layer 1. The ends of the simulated horizontal wells 2 in the same simulated horizontal well group 2 that are away from the simulated derrick 4 are all located in the same oil layer group simulation layer 1.
[0024] The oil layer group simulation layer 1 includes three oil layer simulation layers that are stacked from top to bottom: the upper oil layer simulation layer 5, the middle oil layer simulation layer 6, and the lower oil layer simulation layer 7.
[0025] The simulated horizontal well 2 passes through the upper oil layer simulation layer 5, enters the middle oil layer simulation layer 6, and travels horizontally in the middle oil layer simulation layer 6. The portion of the simulated horizontal well 2 that extends into the oil layer group simulation layer 1 is evenly distributed with vertically arranged simulated fractures 8. The simulated fractures 8 are all located in the middle oil layer simulation layer 6, and the two ends of the simulated fractures 8 extend into the upper oil layer simulation layer 5 and the lower oil layer simulation layer 7, respectively.
[0026] In one embodiment, the oil layer group simulation layer 1 is set to three, and two simulated horizontal well groups 2 are arranged in the bottom oil layer group simulation layer 1 among the three oil layer group simulation layers 1, and the two horizontal well groups are arranged in opposite directions in the oil layer group simulation layer 1.
[0027] In the other two oil layer groups, a simulated horizontal well 2 is set in each simulated layer 1, and the horizontal well groups in the simulated layers 1 of the two oil layer groups have opposite directions of passage.
[0028] Each simulated horizontal well group 2 contains 5 simulated horizontal wells 2, which are arranged in a matrix towards one end of the simulated derrick 4. See [link / reference] Figure 2 .
[0029] In one embodiment, one end of the simulated horizontal well 2 in the same group of simulated horizontal wells 2, facing the simulated derrick 4, is arranged along the Y-axis in the simulated loess layer 3, and the other end is arranged along the X-axis in each simulated oil layer group 1. In use, the simulated horizontal well 2 is made of copper or iron wire with sufficient hardness, ensuring that after installation, the simulated derrick 4 and the simulated loess layer 3, supported by the simulated horizontal well 2, will not tilt. Other measures can also be taken to ensure the strength of the invention, such as placing it inside a box and fixing it in place.
[0030] The upper oil layer simulation layer 5, the middle oil layer simulation layer 6, and the lower oil layer simulation layer 7 are all made of transparent gel.
[0031] In one embodiment, a transparent box is also included, and the oil layer group simulation layers 1 are all filled and disposed in the transparent box.
[0032] A colorless, transparent gel separator layer is filled between adjacent oil layer groups in simulated layer 1.
[0033] The model making process of this utility model:
[0034] Step 1: Make a transparent box that is 70cm long, 35cm wide, and 46cm high using transparent plastic sheets.
[0035] Step 2: See Appendix Figure 2 From left to right, the simulated horizontal well groups are the first well group, the second well group, the third well group and the fourth well group. The second well group is made of pink copper wire and the third well group is made of cyan copper wire. The radius of the simulated horizontal well 2 in the second well group and the third well group is set to 0.5cm, the length of the vertical section is 20cm and the length of the horizontal section is 30cm.
[0036] Step 3: Use yellow copper wire to make the first well group. The radius of the simulated horizontal well 2 in the first well group is set to 0.5cm, the length of the vertical section is 37cm, and the length of the horizontal section is 30cm.
[0037] Step 4: Use orange copper wire to make the fourth well group. The radius of the simulated horizontal well 2 in the fourth well group is set to 0.5cm, the length of the vertical section is 54cm, and the length of the horizontal section is 30cm.
[0038] Step 5: Use a sky blue eraser to cut an oval-shaped disc with a major axis radius of 4cm, a minor axis radius of 1cm, and a thickness of 0.5cm. Prepare enough colored eraser discs to simulate crack 8.
[0039] Step 6: Pass the simulated horizontal well 2 through the middle of the simulated fracture 8. Insert 12 simulated fractures 8 into each simulated horizontal well 2, so that they are evenly distributed in the part of the simulated horizontal well 2 that penetrates the simulated oil layer 1 of the oil layer group, that is, evenly distributed in the horizontal well section and located at the position of the corresponding simulated oil layer.
[0040] Step 7: Use a tan eraser to make a simulated loess layer on the ground, with a thickness of 2cm and a top and bottom surface of 20*16.5cm cuboids. Drill 20 round holes with a radius of 0.5cm and a depth of 1cm in 5 rows and 4 columns on the bottom surface of the cuboid, with an interval of 0.25cm between each hole.
[0041] Step 8: Fix the tops of the second and third well groups into the corresponding holes in the simulated loess layer on the ground, with the horizontal well sections oriented east-west;
[0042] Step 9: Measure 12cm from the bottom of the transparent plastic box upwards as the bottom oil layer simulation layer 1 in the model diagram. Divide the bottom oil layer simulation layer 1 into 3 layers and pour different colored transparent gels from bottom to top. Fill the bottom layer with 4cm thick pink transparent gel as the lower oil layer simulation layer 7. After the gel of the lower oil layer simulation layer 7 solidifies, fill it with 4cm thick orange transparent gel as the middle oil layer simulation layer 6. After the gel of the middle oil layer simulation layer 6 solidifies, fill it with 4cm thick pink transparent gel as the upper oil layer simulation layer 5.
[0043] Step 10: After all the transparent gels in the bottommost oil layer group simulated layer 1 have solidified, inject a 5cm thick layer of colorless transparent gel into the transparent plastic box as a separator layer.
[0044] Step 11: Fix the first well group according to the method in step 8. After the colorless and transparent gel in step 10 solidifies, form the intermediate oil layer simulation layer above the bottom oil layer group simulation layer 1 according to the method in step 9, and repeat step 10;
[0045] Step 12: Fix the fourth well group according to the method in step 8, and form the uppermost oil layer group simulated layer 1 according to the method in step 9; in steps 11 and 12, the simulated horizontal wells 2 in the first and fourth well groups are set to travel in the east-west direction and in opposite directions.
[0046] Step 13: Use red copper wire to make a simulated well frame 4 and fix it at the center point of the top surface of the loess layer.
Claims
1. Develop multiple sets of three-dimensional visual models of horizontal well groups in shale tight oil reservoirs, including multiple simulated horizontal well groups and simulated oil reservoir layers, characterized in that... The oil layer simulation layers are stacked from top to bottom, and a ground loess layer simulation layer is set above the top oil layer simulation layer. A simulated derrick is set on the ground loess layer simulation layer. The simulated horizontal well group includes multiple simulated horizontal wells. One end of each simulated horizontal well emerges from the simulated loess layer on the ground and is located at the bottom of the derrick. The other end of each simulated horizontal well is respectively set in the simulated oil layer group. The ends of the simulated horizontal wells in the same simulated horizontal well group that are far from the simulated derrick are all located in the same simulated oil layer group. The oil layer group simulation layer includes three oil layer simulation layers that are stacked sequentially from top to bottom: the upper oil layer simulation layer, the middle oil layer simulation layer, and the lower oil layer simulation layer. The simulated horizontal well passes through the upper oil layer simulation layer, enters the middle oil layer simulation layer, and travels horizontally within the middle oil layer simulation layer. The portion of the simulated horizontal well extending into the oil layer group simulation layer is evenly distributed with vertically arranged simulated fractures. All simulated fractures are located in the middle oil layer simulation layer, and the two ends of the simulated fractures extend into the upper oil layer simulation layer and the lower oil layer simulation layer, respectively.
2. The three-dimensional visual model of horizontal wells in multiple sets of large well groups of shale oil tight oil reservoirs as described in claim 1, characterized in that, The oil layer group simulation layer is set to three. In the bottom oil layer group simulation layer, two simulated horizontal well groups are arranged, and the two horizontal well groups are arranged in opposite directions in the oil layer group simulation layer. In the other two simulated oil layer groups, a simulated horizontal well is set up in each of the simulated layers, and the horizontal well groups in the simulated layers of the above two oil layer groups travel in opposite directions.
3. The three-dimensional visual model of horizontal wells in multiple sets of large well groups of shale oil tight oil reservoirs as described in claim 2, characterized in that, Each simulated horizontal well group contains 5 simulated horizontal wells, which are arranged in a matrix towards the end of the simulated derrick.
4. The three-dimensional visual model of horizontal wells in multiple sets of large well groups of shale oil tight oil reservoirs as described in claim 1, characterized in that, In the same group of simulated horizontal wells, one end of the simulated horizontal well facing the simulated derrick is arranged along the Y-axis in the simulated loess layer on the ground, and the other end is arranged along the X-axis in each simulated oil layer group.
5. The three-dimensional visual model of horizontal wells in multiple sets of shale oil tight oil reservoirs as described in claim 1, characterized in that, The upper oil layer simulation layer, the middle oil layer simulation layer, and the lower oil layer simulation layer are all made of transparent gel.
6. The three-dimensional visual model of horizontal wells in multiple sets of shale oil tight oil reservoirs as described in claim 1, characterized in that, It also includes a transparent box, and the simulated oil layer group is filled and disposed inside the transparent box.
7. The three-dimensional visual model of horizontal wells in multiple sets of shale oil tight oil reservoirs as described in claim 6, characterized in that, A colorless, transparent gel separator was placed between the simulated layers of adjacent oil layers.