Interlayer interference simulation system and detection method for heterogeneous reservoirs with water injection and combined production

Abstract

The invention belongs to the field of physical experimental equipment for oil and natural gas exploitation, and in particular relates to an interlayer interference simulation system for heterogeneous reservoir water injection and commingled production; the system comprises an advection pump, a plurality of containers, a five-way valve, and a core holder. , X-ray tube, detector and data processing and imaging system; the advection pump is connected with the inlet of each container through pipeline; the inlet of the five-way valve is connected with the outlet of each container through pipeline respectively; the left cover of the core holder is provided with The injection port and the right cover are provided with an output outlet, and the inner side of the left and right covers are sequentially provided with a core plug gasket, a core plug and a sealing gasket from the outside to the inside; the core plug gasket is provided with multiple The round hole, the core plug and the sealant gasket are provided with multiple layer chambers; the sealant cylinder is provided with a multi-layer heterogeneous reservoir plate model; the outlet of the five-way valve is connected to the injection port, and the fluid enters the measuring cylinder after passing through the production outlet. The invention can reflect the degree of interlayer interference through the composition and volume of the liquid volume at the output end, and realize visual analysis.

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...

AI Technical Summary

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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