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Rapid calculation method for permeability of compact oil reservoir volume fracturing reconstruction area

A volume fracturing technology for tight oil reservoirs, applied in earthwork drilling, design optimization/simulation, wellbore/well components, etc. It can solve problems such as slow speed, complicated process of obtaining reservoir parameters, and well shut-in. Simple, convenient and fast calculation, avoiding the effect of difficult fitting

Active Publication Date: 2020-06-16
NORTHEAST GASOLINEEUM UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a fast calculation method for the permeability of the volume fracturing stimulation area of ​​tight oil reservoirs. Problems with complicated process, slow speed or need to shut down the well

Method used

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  • Rapid calculation method for permeability of compact oil reservoir volume fracturing reconstruction area
  • Rapid calculation method for permeability of compact oil reservoir volume fracturing reconstruction area
  • Rapid calculation method for permeability of compact oil reservoir volume fracturing reconstruction area

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Embodiment 1

[0062] The collected basic parameters are shown in Table 1:

[0063] (1) Basic parameters

[0064] Table 1 basic data table

[0065]

[0066] (2) Calculation results

[0067] Depend on figure 2 It can be obtained that the intercept of the linear flow stage regression line is -1.5457, so the permeability of the reformed area is 0.01047 μm 2 .

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Abstract

The invention relates to a rapid calculation method for the permeability of a compact oil reservoir volume fracturing reconstruction area. The method comprises the steps that 1, production data is collected, and required basic parameters are calculated, wherein the production data includes yield data and pressure data in the production stage, and the basic parameters comprise the original pressure, the comprehensive compression coefficient, the porosity, the thickness, the fluid volume coefficient, the viscosity and the fracture half-length of a stratum; 2, a relation curve of the ratio of thepressure difference to the yield and the material balance time is drawn; 3, the permeability of the reconstruction area is calculated by utilizing a linear flow equation of the linear flow stage. According to the method, linear regression is carried out by utilizing the production data of the linear flow stage so as to determine the permeability in combination with the linear flow equation. According to the method, well shutdown is not needed, the permeability can be calculated through the production data, meanwhile, the problem that a yield decreasing curve is difficult to fit is also avoided, and the calculation speed and precision are greatly improved.

Description

Technical field: [0001] The invention relates to the technical field of unconventional oil and gas development, in particular to a fast calculation method for the permeability of volume fracturing reformed areas of tight oil reservoirs. Background technique: [0002] Horizontal wells combined with large-scale volume fracturing technology have become the main means of developing tight oil reservoirs. Tight oil reservoirs have small porosity, extremely low permeability, and are difficult to develop. Conventional fracturing methods are difficult to achieve good development results. Horizontal wells can increase the drainage area, and volumetric fracturing can generate multiple high-conductivity vertical fractures around the horizontal well, and generate complex fracture networks near the main fractures, which greatly improves the overall permeability of the reservoir and makes tight reservoirs be effectively developed. [0003] Well test interpretation using pressure recovery...

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Application Information

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IPC IPC(8): E21B49/00G06F30/20
CPCE21B49/00
Inventor 尹洪军袁鸿飞邢翠巧徐国函刘岢鑫付春权
Owner NORTHEAST GASOLINEEUM UNIV