Reservoir transformation method for hydraulic fracturing and application

A technology for reservoir reconstruction and hydraulic fracturing, which is applied in earthwork drilling, wellbore/well components, production fluids, etc., to achieve the effects of improving economy, reducing water consumption, and improving economy and efficiency

Pending Publication Date: 2022-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low viscosity of carbon dioxide itself, even if the viscosity does not exceed 10cp after thickening, there are relatively large technical limitations in rock carrying and fracture creation

Method used

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  • Reservoir transformation method for hydraulic fracturing and application
  • Reservoir transformation method for hydraulic fracturing and application
  • Reservoir transformation method for hydraulic fracturing and application

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Embodiment Construction

[0057] The present invention is specifically described below in conjunction with specific embodiment, it is necessary to point out here that following embodiment is only used for the further description of the present invention, can not be interpreted as the restriction to protection scope of the present invention, those skilled in the art can understand the present invention according to the content of the present invention Some non-essential improvements and adjustments made by the invention still belong to the protection scope of the present invention.

[0058] In addition, it should be noted that the various specific technical features described in the following specific embodiments may be combined in any suitable manner if there is no contradiction. In order to avoid unnecessary repetition, various possible combinations are not further described in the present invention.

[0059] In addition, various combinations of different implementations of the present invention can a...

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Abstract

The invention discloses a reservoir transformation method for hydraulic fracturing and application. The method comprises the following steps: (1) making a main fracture by using a high-viscosity glue solution; (2) crack forming and crack expanding are conducted through water-phase fracturing fluid; (3) injecting a carbon dioxide foam fracturing fluid carrying a propping agent; (4) displacement operation; and (5) other sections are subjected to fracturing construction, and the step (1) to the step (4) are repeated until all the sections are constructed. According to the method, the foam fracturing fluid with high sand-carrying performance is used for replacing part of slickwater, and the use amount of clear water is greatly reduced; the limit water phase proportion is confirmed through an experimental method, so that formation of a complex fracture network can be promoted through hydration on the premise of saving the water resource during fracturing, and finally the economy and the high efficiency of shale oil and gas reservoir development are improved.

Description

technical field [0001] The present invention relates to an unconventional reservoir fracturing technology, in particular to a reservoir stimulation method and application for hydraulic fracturing, specifically, unconventional oil and gas reservoir fracturing that reduces water consumption and improves reservoir stimulation intensity technology. Background technique [0002] The potential of shale gas resources in my country is very huge, and the recoverable resources are about 26×10 12 m 3 , roughly equivalent to that of the United States. Only two sets of Cambrian and Silurian shales in the Sichuan Basin have resources equivalent to 1.5 to 2.5 times the conventional natural gas resources in the basin. However, shale gas reservoirs have low porosity and low permeability, and hydraulic fracturing operations are required to obtain commercial gas flow. [0003] At present, the economic development of unconventional oil and gas reservoirs has been realized through large-scal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26E21B43/267
CPCE21B43/26E21B43/267
Inventor 蒋廷学仲冠宇王海涛左罗李双明卞晓冰卫然苏瑷肖博
Owner CHINA PETROLEUM & CHEM CORP
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