Liquid-solid two-phase radial flow visual simulation experiment device and method for rough cracks

Abstract

The invention discloses a liquid-solid two-phase radial flow visual simulation experiment device and method for rough cracks. The device comprises a wellbore flow simulating system, a rough crack simulating system and a data acquisition system. The method comprises the steps of (1) adding a liquid-phase fluid and the solid-phase particles to a mixed fluid storage tank and stirring evenly; (2) pumping the mixed fluid into a simulated wellbore; (3) the mixed fluid flowing from the simulated wellbore into a simulated rough crack further flowing out from an end outlet, and then flowing back to themixed fluid storage tank through a conveying pipeline to simulate a liquid-solid two-phase radial flow process in a rough crack; (4) reading a pressure gauge and a mixed fluid flowmeter value, collecting high-definition camera data and performing data sorting and analysis; (5) observing the liquid-solid two-phase radial flow in the rough crack under different conditions, and analyzing and comparing the laboratory results. The device and method can provide more accurate and feasible data support and theoretical basis for the research of the liquid-solid two-phase radial flow mechanism in roughcracks.

Description

technical field [0001] The invention relates to the research field of indoor experimental devices for oil and gas exploitation, in particular to a rough fracture liquid-solid two-phase radial flow simulation experimental device and method. Background technique [0002] With the improvement of exploration and development technology, in the world's oil and gas resources, the geological reserves of fractured reservoirs have reached more than 50% of the total proven reserves. In my country, fractured oil and gas reservoirs are widely distributed, and the research on formation fractures has become increasingly popular. Pay attention to. [0003] Fractured reservoirs are generally deeply buried and the distribution of fractures is complex, which makes the geological conditions of the reservoir complex and brings many problems to oil and gas exploitation. Especially in the process of plugging, because the distribution of downhole fractures is difficult to predict and the spatial di...

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Problems solved by technology

[0006] (3) At present, the laboratory cannot observe the specific situation of particle migration in fractures by collecting fractured rock samples for liquid-solid two-phase flow experiments. It can only be determined by indirect parameters such as flow rate, and cannot explain the flow mechanism.

[0008] The patent "a wellbore and formation fracture coupled flow simulation experiment device and method" (CN106640061A) uses a set of fracture plates to connect the simulated wellbore and the simulated formation to study the coupling flow mechanism between the wellbore and formation fractures, ignoring the fracture fluid around the wellbore The flow is often radial flow, and this device cannot simulate the radial flow process of fluid in fractures and wellbore

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