Visualization experiment method for dynamically simulating shale pressing fracture network

An experimental method and dynamic simulation technology, which is applied in earthwork drilling, wellbore/well components, buildings, etc., can solve the problems of failure to meet the quantitative requirements of fracture shape, optimization of fracturing scheme design and quantitative evaluation after fracturing, and accurate simulation results To solve problems such as poor performance, to achieve the effect of intuitive crack shape, uniform force, and stable loading

Inactive Publication Date: 2020-03-27
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it cannot meet the quantitative requirements of fracture morphology under different fracturing modes and construction parameters, and the accuracy of the simulation results is not good, so it cannot be effectively used to guide the optimization of fracturing scheme design and quantitative evaluation after fracturing

Method used

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  • Visualization experiment method for dynamically simulating shale pressing fracture network
  • Visualization experiment method for dynamically simulating shale pressing fracture network
  • Visualization experiment method for dynamically simulating shale pressing fracture network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] see figure 1 and Figure 4 , an experimental method for dynamically simulating shale fracturing fracture network visualization, comprising the following steps:

[0035] a. According to the reservoir mechanical parameters of the shale block to be simulated, high-strength photosensitive resin is selected as the raw material for 3D printing, and the translucent visual simulation shale rock sample 1 is printed first, and then the translucent visual simulation shale is printed The rock sample 1 is polished, and the open-hole wellbore is selected according to the five-point method in the visualized simulated shale rock sample 1, and the simulated wellbore 9 matching the open-hole wellbore is made of stainless steel;

[0036] b. Place the 3D printed visualized simulated shale rock sample 1 in the visualized fracturing cavity 4 of the visualized experimental device, and then put the simulated wellbore 9 into the open hole wellbore of the visualized simulated shale rock sample ...

Embodiment 2

[0041] see figure 1 and Figure 4 , an experimental method for dynamically simulating shale fracturing fracture network visualization, comprising the following steps:

[0042] a. According to the reservoir mechanical parameters of the shale block to be simulated, high-strength photosensitive resin is selected as the raw material for 3D printing, and the translucent visual simulation shale rock sample 1 is printed first, and then the translucent visual simulation shale is printed The rock sample 1 is polished, and the open-hole wellbore is selected according to the five-point method in the visualized simulated shale rock sample 1, and the simulated wellbore 9 matching the open-hole wellbore is made of stainless steel;

[0043] b. Place the 3D printed visualized simulated shale rock sample 1 in the visualized fracturing cavity 4 of the visualized experimental device, and then put the simulated wellbore 9 into the open hole wellbore of the visualized simulated shale rock sample ...

Embodiment 3

[0049] see Figure 1-Figure 4 , an experimental method for dynamically simulating shale fracturing fracture network visualization, comprising the following steps:

[0050] a. According to the reservoir mechanical parameters of the shale block to be simulated, high-strength photosensitive resin is selected as the raw material for 3D printing, and the translucent visual simulation shale rock sample 1 is printed first, and then the translucent visual simulation shale is printed The rock sample 1 is polished, and the open-hole wellbore is selected according to the five-point method in the visualized simulated shale rock sample 1, and the simulated wellbore 9 matching the open-hole wellbore is made of stainless steel;

[0051] b. Place the 3D printed visualized simulated shale rock sample 1 in the visualized fracturing cavity 4 of the visualized experimental device, and then put the simulated wellbore 9 into the open hole wellbore of the visualized simulated shale rock sample 1;

...

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Abstract

The invention discloses a visualization experiment method for dynamically simulating a shale pressing fracture network, and belongs to the technical field of unconventional oil and gas reservoir production increase transformation. The method is characterized by comprising the following steps: a, printing a visualization simulation shale rock sample, and manufacturing a simulation wellbore; b, putting the visualization simulation shale rock sample into a visualized pressing fracture cavity, and then putting the simulation wellbore into an open-hole wellbore; c, applying three-dimensional stressto the visualized pressing fracture cavity through a hydraulic chamber, starting a high-definition video camera to record crack initiation, expansion and extension states of the pressing fracture network under different injection conditions, and collecting displacement and pressure data; d, analyzing test result data to obtain fracture initiation, expansion and extension forms and size parametersunder different pressing fracture modes and different construction parameter conditions. The simulation result can be used for guiding pressing fracture scheme design optimization, field constructiondecision adjustment and post-fracturing quantitative evaluation, and the whole experimental method is simple and easy to operate.

Description

technical field [0001] The invention relates to the technical field of stimulation and transformation of unconventional oil and gas reservoirs, in particular to a dynamic simulation method for visualizing fracture network of shale fracturing. Background technique [0002] Natural gas is currently the cleanest energy in the world. my country has abundant natural gas resources, especially shale gas resources. The efficient development of shale gas has not only effectively slowed down my country's tight supply of natural gas clean energy, but also greatly reduced my country's dependence on foreign energy. Up to now, my country's shale gas development has been going on for several years, among which slick water, large-scale, large-displacement, horizontal well staged fracturing, etc. are the main technologies for shale gas development. However, how to accurately and effectively evaluate Different fracturing modes, such as single-well fracturing, multi-well zipper, multi-well syn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/002E21B43/26
CPCE21B43/26
Inventor 何封张庆李彦超邓才肖剑锋刘子平叶铠睿聂捷谭睿滕怡葳
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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