Concentric double-pipe injection-production horizontal well physical simulation device for thermal recovery of heavy oil

Abstract

The invention relates to a concentric double-pipe injection-recovery horizontal-well physical simulation device for heavy oil thermal recovery. The device comprises a heavy oil reservoir model, wherein a double horizontal well combination structure is arranged in the heavy oil reservoir model and comprises a first horizontal well and a second horizontal well. The concentric double-pipe injection-recovery horizontal-well physical simulation device for the heavy oil thermal recovery also comprises a steam injection combination structure, wherein the steam injection combination structure comprises a first steam injection channel structure which is hermetically communicated with the first horizontal well, the first steam injection channel structure sleeves a second steam injection channel structure with an outlet end positioned in the second horizontal well, the first steam injection channel structure and the first horizontal well form a first independent injection-recovery system, and thesecond steam injection channel structure and the second horizontal well form a second independent injection-recovery system. The device can accurately simulate huff and puff of steam, steam drive, SAGD and other improved thermal recovery development modes of the double-pipe horizontal wells of a heavy oil reservoir, and exploration of a mechanism for increasing the recovery ratio of the heavy oilreservoir under the injection and recovery of the concentric double-pipe horizontal wells is achieved.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a concentric double-pipe injection-production horizontal well physical simulation device for thermal recovery of heavy oil. Background technique [0002] With the deepening of oilfield development, the technical level of various types of oil reservoirs has been continuously improved. At present, for complex and difficult-to-produce oil and gas reservoirs such as extra / ultra-heavy oil, the double-pipe horizontal well injection and production technology has been widely used and achieved good development results. In order to develop such difficult-to-produce and complex reservoirs more reasonably and efficiently, physical simulation experiments have become a very important method. During the experiment, the actual geological parameters and operating parameters of the reservoir scale can be converted into simulation parameters of the laboratory scale according ...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a concentric double-pipe injection-production horizontal well physical simulation device for heavy oil thermal recovery, which overcomes the problem of short migration distance of steam in the horizontal well shaft during the steam injection process in the prior art. Problem, the concentric double-tube injection-production horizontal well physical simulation device for thermal recovery of heavy oil can accurately simulate steam huff and puff, steam flooding, SAGD and other development methods to improve thermal recovery of double-tube horizontal wells in heavy oil reservoirs. Mechanism of Enhanced Oil Recovery in Heavy Oil Reservoirs Under Injection and Production of Pipe Horizontal Wells

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