Heterogeneous reservoir water injection commingling interlayer disturbance simulation system and detection method

Abstract

The invention belongs to the field of physical experiment equipment of petroleum and natural gas exploitation, and particularly relates to a heterogeneous reservoir water injection commingling interlayer disturbance simulation system. The system comprises a constant-flux pump, a plurality of containers, a five-way valve, a core holding unit, an X-ray tube, a detector and a data processing and imaging system. The constant-flux pump is connected with the inlet of each container through pipelines; the inlet of the five-way valve is respectively connected with the outlet of each container through pipelines. A left sealing cover of the core holding unit is provided with an injection port, the right sealing cover of the core holding unit is provided with an output port, the inner sides of the left sealing cover and the right sealing cover are sequentially provided with a core end cap rubber mat, a core end cap and a sealing rubber mat from outside to inside, a plurality of circular holes are formed in the core end cap rubber mat, and the core end cap and the sealing rubber mat are provided with a plurality of layer chambers. A plurality of layers of heterogeneous reservoir slab models are arranged in a sealing rubber sleeve. The outlet of the five-way valve is connected with the injection port, and fluid passes through the output port and enters a measuring cylinder. The heterogeneous reservoir water injection commingling layer disturbance simulation system can reflect layer disturbance degree through the composition and size of liquid amount at the output end, and visualized analysis is achieved.

Description

technical field [0001] The invention belongs to the field of physical experiment equipment for oil and natural gas exploitation, and in particular relates to a research simulation system and detection method for interlayer interference and water plugging and profile control of multi-layer heterogeneous reservoirs. Background technique [0002] The heterogeneity of the oil reservoir is an important factor restricting the development effect of the oilfield. The contradictions such as interlayer interference, single-layer breakthrough, and unbalanced injection and production in the development of the oilfield are all caused by the heterogeneity of the reservoir. . In heterogeneous reservoirs, interlayer heterogeneity is the most macroscopic and lowest level heterogeneity. Interlayer heterogeneity means that the same oilfield can have multiple reservoirs vertically, and the physical properties of these reservoirs may vary greatly, especially for continental oil and gas reservoi...

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Problems solved by technology

The disadvantage of these two models is that the cores with different permeability are placed in separate core tubes, which does not reflect interlayer interference. In addition, the core tube simulates one-dimensional flow, but the actual situation is three-dimensional flow, so the error is very large. Big

At the same time, the current high-temperature and high-pressure simulation system can only reflect the degree of interlayer interference by the composition and volume of the liquid at the output end, and cannot perform visual analysis on the water absorption rate and sweep degree of each layer, which restricts the depth of research on interlayer interference. and applicability

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