Layered steam injection simulation test system and working method thereof

Abstract

The invention discloses a layered steam injection simulation test system and a working method thereof. The system comprises a process tubular column system, a heating system and a pressurization system, wherein the process tubular column system is a main body of the whole layered steam injection simulation test system, and mainly comprises a test sleeve, a pressure gage, a flow meter, an electric control valve, an electric actuated stop valve and the like; in the heating system, a conduction oil electric heating furnace is used as a main body, and an oil tank, an electric actuated stop valve, a hot oil tank, an electric control valve, a thermometer, a flow meter, a pressure gage, an expansion groove and the like are used as auxiliary parts; and in the pressurization system, high-temperature conduction oil stored in the hot oil tank is injected into the system of the corresponding part of the process tubular column by a high-temperature high-pressure pump according to requirements of a test process and the pressurization system can finish the layered steam injection process tubular column test and top and bottom pressure-bearing test of a packer. The system can solve the problem of the selection of the oil layer steam injection parameters of different types of oil deposit in the layered steam injection technology and provides accurate steam distribution parameters for layered steam injection field process design.

Description

Technical field [0001] The invention relates to the technical field of steam injection exploitation, in particular to a layered steam injection simulation test system and a working method thereof. Background technique [0002] Steam injection production is the main process technology for heavy oil development. At present, some blocks have entered the middle and late stages of steam soaking. Due to the differences in physical properties between layers, the oil reservoirs are unevenly produced after multiple rounds of steam injection production. , The low-permeability layer has prominent contradictions, mutual influence, and mutual interference, which are mainly manifested in the high-permeability layer when steam is injected, and the steam is absorbed more obviously, while the low-permeability layer absorbs less steam and has a poor degree of production. This contradiction is particularly prominent between the new and old layers of multi-layer mining. Due to the interference of th...

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Problems solved by technology

[0002] Steam injection production is the main process technology for heavy oil development. At present, some blocks have entered the middle and late stage of steam stimulation. Due to the difference in physical properties between layers, the production of oil reservoirs after multiple rounds of steam injection production is uneven, high , low-permeability layers have prominent contradictions, interact and interfere with each other, mainly manifested in the fact that the high-permeability layer absorbs more steam during steam injection, and the production is obvious, while the low-permeability layer absorbs less steam and the degree of production is poor

This contradiction is particularly prominent between the new and old layers of multi-layer mining. Due to the interference of the old layers, the new layer cannot be produced normally.

At the same time, the number of replenishment layers gradually increases, and there are differences between the new and old layers: producing degree, oil layers, water cut changes, etc. Multi-layer co-injection restricts the development of new oil layers

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