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Natural fractured reservoir fracturing reformation method

A technology for natural fractures and reservoirs, which is used in earth-moving drilling, production of fluids, wellbore/well components, etc. to improve the overall effect, rationally optimize fracturing design, and improve conductivity.

Inactive Publication Date: 2015-04-22
PETROCHINA CO LTD
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Problems solved by technology

The above research has a certain promotion effect on improving the stimulation effect of volume fracturing, but most of the technologies are more inclined to tools and equipment, and some provide methods for temporary plugging and diversion. However, for fractured reservoirs, how to judge the degree of natural fracture development? , how to plug and utilize natural fractures in natural fracture reservoirs, promote the further development of natural fractures in fracturing, and then increase the stimulation volume of the entire fracturing, still needs further research

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  • Natural fractured reservoir fracturing reformation method

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Embodiment Construction

[0014] The technical means adopted by the present invention to achieve the intended invention purpose are further described below in conjunction with the drawings and preferred embodiments of the present invention.

[0015] First of all, it should be explained that words such as "first", "second", and "third" used in this document are only used to modify and distinguish technical features with the same name, and are not used to indicate that there is priority between them. weight order, precedence relationship, or the chronological order when executing the method steps.

[0016] figure 1 It is a flowchart of a fracturing stimulation method for natural fracture reservoirs according to an embodiment of the present invention. Such as figure 1 As shown, the method includes:

[0017] In step 1, it is first necessary to test the characteristics of formation fluid loss by means of testing methods at the site of the stimulated reservoir, and then reflect the development of fracture...

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Abstract

The invention discloses a natural fractured reservoir fracturing reformation method. The method includes the steps that 1, linear glue liquid is adopted to conduct stepwise discharge construction on a fractured reservoir to be reformed, and the fractured reservoir natural fracture development degree is obtained in combination with a pumping termination test in the construction process; 2, according to the fractured reservoir natural fracture development degree, smooth ice and propping agents of the first specification are injected into the fractured reservoir to be reformed to conduct first plugging, and a first kind of manual fracture is formed; 3, according to the fractured reservoir natural fracture development degree, particle temporary plugging agents and propping agents of the second specification are injected to the first kind of manual fracture in a slug mode to conduct second sealing, and a second kind of manual fracture is formed; 4, according to the fractured reservoir natural fracture development degree, propping agents of the third specification are injected into the second kind of manual fracture to conduct filling, a third kind of fracture is formed, and natural fractured reservoir fracturing reformation is finished.

Description

technical field [0001] The invention belongs to the technical field of exploitation and production of natural fractures or relatively developed reservoirs in low permeability and unconventional oil and gas reservoirs, in particular to a fracturing reconstruction method for natural fracture reservoirs, which is used to improve the complexity of fracturing fractures in natural fracture reservoirs. effect. Background technique [0002] In the current fracturing technology research, Mayerhofer and Lolon et al. (M J Mayerhofer, E P Lolon, N R Warpinski, et al. What is stimulated rock volume? [C]. SPE 119890, 2008) first published in 2008 the title of the paper In this paper, the question of what is the stimulated volume of the reservoir is raised, and through the comparative analysis of the cumulative production of the Barnett shale, it is further verified that the larger the stimulated volume, the better the stimulation effect. Since then, the volume fracturing technology has l...

Claims

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Application Information

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IPC IPC(8): E21B43/267
CPCE21B43/267
Inventor 才博丁云宏赵贤正王欣陈建军王永辉管保山沈华杨振周何春明段贵府付海峰
Owner PETROCHINA CO LTD
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