Tight oil reservoir production simulation device and method

Abstract

The present invention provides a dense oil reservoir exploitation simulation device and method. According to the present invention, a first high-pressure pump is connected with the input end of a core holding unit via a crude oil pipeline and an upstream valve after being connected with a fluid container, and the core holding unit comprises a core, a rubber sealing cylinder and a sealing steel cylinder. The rubber sealing cylinder sleeves the core and tightly presses on the core by the pressure provided by a second high-pressure pump, and the sealing steel cylinder wraps the rubber sealing cylinder. The output end of the core holding unit is connected with a back-pressure valve, and the back-pressure valve is connected with a gas flow meter via a measurement pipeline and is also connected with a back-pressure control pump. During the process of simulating the dense oil reservoir exploitation, by the first high-pressure pump, the fluid in the fluid container is pressed in the core via the input end of the core holding unit, the back-pressure control pump controls the back-pressure valve, and the pressure difference is generated at the upstream part and the downstream part of the core holding unit, so that an outputted liquid is outputted from the input end of the core holding unit and flows in the gas flow meter via the measurement pipeline. The measurement pipeline can measure the size of the output liquid accurately, so that the daily output, namely the production capability of a dense oil reservoir can be evaluated accurately.

Description

technical field [0001] The embodiments of the present invention relate to oil and gas field survey and development technologies, and in particular to a tight oil reservoir exploitation simulation device and method. Background technique [0002] Tight oil refers to the accumulation of oil formed without large-scale long-distance migration in tight reservoirs sandwiched in or close to high-quality oil source layers. It is an unconventional oil resource. The storage of tight oil is called tight oil storage. layer. Because tight oil reservoirs have low permeability, few produced fluids, and difficult exploration, it is necessary to evaluate and accurately determine the ability of tight oil reservoirs to produce fluids, for example, the volume of produced fluids, before exploitation. [0003] At present, in order to determine the volume of produced fluid in tight oil reservoirs, flow measurement methods are often used, such as test tube volumetric method, test tube weighing meth...

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Problems solved by technology

[0004] However, whether it is the test tube body measurement method or the test tube weighing method, due to the long time delay measurement of tight oil, the produced fluid is easy to volatilize, even if appropriate measures are taken to reduce volatilization, such as pasting plastic wrap on the test tube, it is difficult to eliminate error

The larger the error, the lower the accuracy of the volume of the produced fluid can be determined, and it is impossible to accurately determine the ability of tight oil reservoirs.

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