Complex fault block oil reservoir gravitational differentiation simulation experiment device and method

Abstract

The invention discloses a complex fault block oil reservoir gravitational differentiation simulation experiment device. The device comprises a simulation container, an injection simulation shaft, a production simulation shaft, a remaining oil observation shaft and a partition plate assembly, the simulation container is provided with a visual transparent window, and the visual transparent window is made of a transparent material; and the injection simulation shaft, the production simulation shaft and the remaining oil observation shaft are all made of transparent materials. The invention further provides a complex fault block oil reservoir gravitational differentiation simulation experiment method, by means of the complex fault block oil reservoir gravitational differentiation simulation experiment device, the arrangement manner and position of the partition plate assembly are changed, a water drive process gravitational differentiation simulation experiment of multiple faults under interlayer shielding in different forms can be simulated, and whether the different angles of the faults are the gravitational differentiation process under the conditions of closed faults is analyzed. According to the device, the gravitational differentiation characteristics of multiphase fluid under various conditions can be conveniently observed, the visual observation of the gravitational differentiation phenomenon is realized, and convenience is provided for oil reservoir exploitation.

Description

technical field [0001] The invention relates to the technical field of petroleum engineering, in particular to a gravity differentiation simulation experiment device and method for complex fault-block reservoirs. Background technique [0002] In the mixing action of the reservoir, driven by gravity and buoyancy, the fluid inside the reservoir gradually forms a differentiated distribution of gas cap, oil column and bottom water (or edge water) from top to bottom according to the density difference. The interior also presents a differentiation distribution phenomenon in which the density of crude oil gradually increases from top to bottom, which are called gravity differentiation, or density differentiation. [0003] At present, many oil reservoirs in China are affected by gravity differentiation, resulting in varying degrees of impact on oil and gas recovery, especially for gravity differentiation in faults. At present, domestic research on gravity differentiation in complex ...

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Problems solved by technology

[0003] At present, many oil reservoirs in China are affected by gravity differentiation, resulting in varying degrees of impact on oil and gas recovery, especially for gravity differentiation in faults. At present, domestic research on gravity differentiation in complex faults is mainly through Some theoretical methods, such as numerical analysis, lack experimental research and analysis of gravity differentiation phenomena in complex faults

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