Gas reservoir water layer water body mobility prediction device and method and controller

Abstract

The invention provides a gas reservoir water layer water body mobility prediction device and method and a controller, and the device comprises a rock core holder which is provided with a first space and a second space; the first space is used for placing a to-be-predicted rock sample; the second space surrounds the first space; a confining pressure pump is used for applying confining pressure to the rock sample to be predicted by injecting pressure into the second space; a high-pressure injection pump is used for injecting the simulated formation water in the intermediate container into the rock core holder; a back pressure pump is used for injecting pressure into the rock core holder; a controller is used for controlling the high-pressure injection pump and the back-pressure pump to pressurize the two ends of the rock core holder after the confining pressure reaches a preset confining pressure value; and when the pressure at the two ends reaches the stratum pressure set value and doesnot change, the high-pressure injection pump is controlled to be closed, the back pressure pump is controlled to reduce the pressure, and the water mobility is predicted according to the water yieldunder each pressure drop value. According to the scheme, quantitative prediction of the mobility of the water body of the water layer in the gas reservoir development process is achieved, and important guiding significance is achieved for gas reservoir development.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a device, method and controller for predicting the mobility of water bodies in gas reservoir water layers. Background technique [0002] The water body of the gas reservoir exists in the rock pores of the gas reservoir. During the exploitation of the gas reservoir, as the pore pressure of the gas reservoir decreases, a pressure difference will be generated between the water body and the gas reservoir. , the water body flows and intrudes into the gas reservoir, resulting in a significant decline in the productivity and recovery of the gas reservoir, which affects the development effect of the gas reservoir. Therefore, the mobility prediction of the water body is of great significance to the development of the gas reservoir. [0003] Aiming at the prediction of water body mobility in gas reservoirs, there are many related research reports. The main method is t...

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Problems solved by technology

These studies did not directly study the mobility of water bodies in gas reservoirs, and it is difficult to figure out the characteristics of water bodies such as water body activity, lower limit of flow, and flow laws.

[0004] For the above problems, no effective solution has been proposed

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