Stratum stress sensitive experiment testing method and device

A technology of formation stress and testing method, applied in soil material testing, material inspection products, etc., can solve problems such as the stability difference of displacement pressure difference, and achieve the effect of solving the problem of poor stability of displacement pressure difference

Active Publication Date: 2017-02-08
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The designed experimental device can realize the function of simulating the mining process, changing the confining pressure and internal pressure synchronously, and can solve the problem of poor stability of displacement pressure difference in the experiment

Method used

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  • Stratum stress sensitive experiment testing method and device
  • Stratum stress sensitive experiment testing method and device
  • Stratum stress sensitive experiment testing method and device

Examples

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Embodiment 1

[0093] Such as figure 2 As shown, this example provides a set of stress-sensitivity experimental test equipment for simulating the simultaneous change of overburden pressure and pore pressure in tight gas reservoirs, including injection system 1, core model system 2, back pressure system 3, recovery system 4 and data acquisition System 5. The rock core holder 21 of the rock core model system 2 is connected with the valve 188 of the injection system 1, and the other end of the rock core holder 21 is connected with the back pressure valve 31 of the back pressure system through the valve 242; the other end of the back pressure valve 31 is through the valve 332 It is connected with the gas-liquid separator 41 of the recovery system 4; the data acquisition system communicates with the injection system, the rock core model system, the back pressure system and the recovery system through the pressure sensor 511, the pressure sensor 512, the pressure sensor 513, the gas flow meter 53...

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Abstract

The invention provides a stratum stress sensitive experiment testing method and device. The method comprises the following steps: (1) obtaining actual geological data; (2) selecting a formula for calculating a reservoir stratum pressure arch ratio according to a shape of a reservoir stratum and dynamic property difference of the reservoir stratum and surrounding rock; (3) determining initial reservoir stratum pressure and initial overburden pressure of reservoir stratum rock; (4) determining a change relation of confining pressure and driving pressure along return pressure; (5) recovering a rock core with undeveloped natural fractures to an original confined water saturation degree; (6) carrying out ageing treatment on the rock core; (7) recovering original stress and fluid pressure of the rock core; (8) simulating stress sensibility of the reservoir stratum in an exploitation process; (9) processing and analyzing data. According to the stratum stress sensitive experiment testing method and device, a quantitative change relation of the overburden pressure of the reservoir stratum along pore pressure in an oil-gas reservoir development process can be obtained according to the actual geological data of oil-gas reservoirs.

Description

technical field [0001] The invention relates to the field of oil exploitation, in particular to a test method and device for stratum stress sensitivity experiments. Background technique [0002] The reserves of low-permeability and ultra-low-permeability oil and gas fields account for a relatively large proportion of my country's undeveloped petroleum geological reserves, and they are the resource base for my country's petroleum industry to increase reserves and production. Their reasonable and effective development plays a vital role in the development of my country's petroleum industry . To rationally develop low-permeability reservoirs, it is an important prerequisite to understand the particularity of low-permeability reservoirs in development. [0003] For deeply buried oil and gas reservoirs, the reservoir rocks are simultaneously affected by the overlying strata pressure, surrounding lateral pressure, and pore fluid pressure. Before the oil and gas reservoirs are deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 石军太黄亮李相方王钒潦潘羽
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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