Method of experimenting on impact of high-pressure fracture-cave bodies in carbonate rock reservoirs upon hydraulic fracture extension

A technology for carbonate rock reservoirs and carbonate reservoirs, applied in the field of hydraulic fracturing simulation experiments, to achieve the effects of optimized production stimulation, simple structure, and simple experimental methods

Active Publication Date: 2016-02-17
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

[0004] However, many problems at the technical level of volume fracturing have not been solved, and a lot of research work is needed in theory and application

Method used

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  • Method of experimenting on impact of high-pressure fracture-cave bodies in carbonate rock reservoirs upon hydraulic fracture extension
  • Method of experimenting on impact of high-pressure fracture-cave bodies in carbonate rock reservoirs upon hydraulic fracture extension
  • Method of experimenting on impact of high-pressure fracture-cave bodies in carbonate rock reservoirs upon hydraulic fracture extension

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Embodiment

[0037] figure 1 It is a schematic diagram of the artificial test piece mold described in the embodiment of the present invention; figure 2 It is a schematic diagram of the artificial test piece processing described in the embodiment of the present invention; image 3 It is a schematic diagram of the acoustic emission monitoring system described in the embodiment of the present invention; Figure 4 It is a schematic diagram of the overall test piece described in the embodiment of the present invention.

[0038] An experimental method for simulating the effect of high-pressure fracture-vuggy bodies on hydraulic fracture propagation in carbonate reservoirs, comprising the following steps:

[0039] 1. Preparation of Specimen

[0040] Assemble the fracture-cavity body fluid injection system and fracturing fluid injection system components; connect the fracture-cavity body 8, the fracture-cavity body fluid injection string 5 and the simulated wellbore 4 according to figure 1The...

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Abstract

The invention provides a method of experimenting on impact of high-pressure fracture-cave bodies in carbonate rock reservoirs upon hydraulic fracture extension, comprising following steps: a), building a fracture-cave body; b), mounting a jig of an integrated test piece, and placing an assembled artificial material in the jig; c), applying set constant three-way confining pressure to the test piece; d), injecting a liquid into the fracture-cave body through a fracture-cave body liquid injection line at constant flow to a designed pressure, and switching a hydraulic pump to a constant pressure state to keep the inner pressure of the fracture-cave body unchanged; e), injecting fracturing liquid into a simulation shaft through a fracturing liquid injection line, and stopping injection after a hydraulic fracture extends to the designed size; removing the test piece from a test rack, and dissecting the test piece to observe the fracture form. The method enables a carbonate rock reservoir hydraulic fracturing simulation test to be carried under laboratory conditions and the impact of the high-pressure fracture-cave body upon hydraulic fracture extension.

Description

technical field [0001] The invention belongs to the technical field of hydraulic fracturing simulation experiments, in particular to an experimental method for the influence of high-pressure fracture-cave bodies on the expansion of hydraulic fractures in the process of volume fracturing of carbonate rock reservoirs, and is suitable for studying volume fracturing of carbonate rock reservoirs During the process, the influence of high-pressure fractured-vuggy body on hydraulic fracture diversion and expansion is strong or weak. Background technique [0002] With the continuous development of carbonate reservoirs, conventional fracturing technology can no longer fully meet the needs of stimulation and stimulation, so it is urgent to change the way of thinking and research new technologies to improve single well production. For this reason, some new techniques and methods have been continuously explored and tried in various oil fields. [0003] Volume fracturing technology, as a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26E21B49/00
Inventor 张子珂张广清王元元王越金希
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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