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Evaluation method of carbonatite reservoir volume acid fracturing flow guiding capacity

A carbonate reservoir and conductivity technology, which is applied in the development of fluids, earthwork drilling, wellbore/well components, etc., can solve the problem of volumetric acid fracturing of carbonate reservoirs and provide a reasonable reference, Large access and other problems, to achieve the effect of strong guidance, simple operation, and a wide range of applications

Inactive Publication Date: 2018-06-26
PETROCHINA CO LTD
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Problems solved by technology

[0005] In the test of volume acid fracturing conductivity of existing carbonate rock reservoirs, the fractures formed by simulating volume acid fracturing of carbonate rocks are quite different from the actual ones on site. At the same time, there is currently no test and evaluation method for the volumetric acid fracturing conductivity of carbonate rocks

Method used

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  • Evaluation method of carbonatite reservoir volume acid fracturing flow guiding capacity
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  • Evaluation method of carbonatite reservoir volume acid fracturing flow guiding capacity

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Embodiment Construction

[0033] In order to make the technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0034] The embodiment of the present invention provides a method for evaluating the volumetric acid fracturing conductivity of carbonate rock reservoirs, such as figure 1 As shown, the method includes:

[0035] Step 101: Using an artificial seam-making device to center the carbonate rock slab along the height direction to obtain irregular upper and lower rock slabs;

[0036] Specifically, the full-diameter core column or outcrop taken out of the well is processed into a cuboid rock slab with the same width and slightly longer length as the core holder according to the size of the acid-etched fracture diverter, and the height cannot exceed the maximum height allowed by the holder , draw a line in the middle along the length direction of the processed r...

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Abstract

The invention discloses an evaluation method of the carbonatite reservoir volume acid fracturing flow guiding capacity and belongs to the technical field of exploration and development of oil and gas.An artificial joint forming device is adopted to conduct joint cutting and transverse slipping on a carbonatite rock board, and an upper rock board body and a lower rock board body with cracks are obtained; a first flow guiding capacity test is conducted, and the value of the first flow guiding capacity is obtained; acid liquid is injected between the upper rock board body and the lower rock board body, a second flow guiding capacity test is conducted, and the value of the second flow guiding capacity is obtained; the values of the first flow guiding capacity and the second flow guiding capacity are compared, and thus the increased degree of the flow guiding capacity after acid injection can be known; the crack forming mode of the test rock board accords with the actual stratum situationbetter, and thus the evaluation method of the carbonatite reservoir volume acid fracturing flow guiding capacity can provide scientific guidance for actual carbonatite reservoir volume acid fracturingconstruction parameter optimization, acid liquid system preferable selection and process optimization; and meanwhile the evaluation method is easy to operate, high in guidance and wide in applicationrange.

Description

technical field [0001] The invention belongs to the technical field of oil and gas exploration and development, and in particular relates to an evaluation method for volumetric acid fracturing flow conductivity of carbonate rock reservoirs. Background technique [0002] Carbonate reservoirs in my country are rich in gas pool resources. For carbonate reservoirs, the physical properties of the reservoirs are poor, the rocks contain more quartz, and the rocks are more brittle. Therefore, the fractures generated by large-scale volume fracturing can be dislocated and slipped to form self-supporting, and then Effectively expand the stimulated volume of the reservoir. In 2013, the Sinian Dengying Formation tight reservoir of PetroChina Southwest Oil and Gas Field Company tested volume fracturing. Firstly, low-viscosity slick water or low-viscosity autogenous acid prefluid was used for large-volume and large-displacement volume fracturing or volume fracturing. Acid fracturing, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00E21B43/27
CPCE21B43/26E21B49/00
Inventor 韩慧芬马辉运杨建彭均亮彭欢高新平王良闵建
Owner PETROCHINA CO LTD
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