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Dual-medium and long-core experimental method for variable-pressure soaking

A dual-medium, experimental method technology, applied in the direction of measuring devices, suspension and porous material analysis, scientific instruments, etc., can solve the problems of low reliability, achieve the effect of improving reliability, feasible principle, and improving experimental accuracy

Inactive Publication Date: 2016-02-03
PETROCHINA CO LTD
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Problems solved by technology

[0004] In order to overcome the low reliability of existing test methods, the present invention provides a double-medium long core test method for variable pressure brine wells, in order to achieve the purpose of improving test accuracy

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  • Dual-medium and long-core experimental method for variable-pressure soaking
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  • Dual-medium and long-core experimental method for variable-pressure soaking

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Embodiment Construction

[0023] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0024] Such as Figure 1 to Figure 3 As shown, the embodiment of the present invention provides a double-medium long core test method for variable pressure braising wells. The double-medium long core test method for variable pressure braising wells includes the following steps: Step 1, preparing a composite long core 20; Step 2, saturating Combined long core 20; step 3, injecting the first medium to displace the combined long core 20.

[0025] In the double-medium long core experiment method of the variable pressure brine well in the embodiment of the present invention, the short core in the prior art is prepared into a combined long core 20, and the total pore volume of the combined long core...

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Abstract

The invention provides a dual-medium and long-core experimental method for variable-pressure soaking. The dual-medium and long-core experimental method comprises the following steps of step 1, preparing a combined long core; step 2, saturating the combined long core; step 3, injecting a first medium to replace the combined long core. According to the dual-medium and long-core experimental method for variable-pressure soaking in the embodiment of the invention, a short core in the prior art is prepared into the combined long core, and total pore size volume of the combined long core is increased to be large enough, so that the reliability of a flow test can be improved, and further the aim of improving the experimental precision is improved. In addition, the experimental method in the embodiment of the invention is feasible in principle and is simple in operation.

Description

technical field [0001] The invention relates to a double-medium medium long core experiment method for variable pressure braising wells. Background technique [0002] For dual-media reservoirs, the porosity of the reservoir matrix core is too small, and conventional standard short cores are used to carry out gas-flooding matrix gas absorption conditions, seepage relationship between gas-flooding matrix and fractures, micro-fractures and main fractures, oil displacement efficiency, matrix system and Experimental research on the contribution of the fracture system to the recovery factor, etc., is affected by the "dead volume" in the core holder and connecting pipeline of the experimental test system, and the test of the seepage rate from the matrix to the fracture system during the displacement process is difficult to succeed. It is also difficult to obtain feasible experimental results. [0003] Disadvantages of the prior art: in the prior art, short cores are used for exper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
Inventor 梁飞司勇任芳祥张方礼龚姚进孙雷梁宇盛聪林仁义
Owner PETROCHINA CO LTD
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