Dual-horizontal-well superheated steam assisted gravity oil drain well net and exploitation method

Abstract

The invention provides a dual-horizontal-well superheated steam assisted gravity oil drain well net and an exploitation method. The dual-horizontal-well superheated steam assisted gravity oil drain well net comprises a first horizontal well (10) and a second horizontal well (20); a first long pipe column (11) and a first short pipe column (12) are arranged in the first horizontal well (10); and a second long pipe column (21) and a second short pipe column (22) are arranged in the second horizontal well (20). According to the dual-horizontal-well superheated steam assisted gravity oil drain well net and the exploitation method, a superheated steam assisted gravity oil drain mode is adopted, the problems that in the wet and saturated steam injection process, the heat utilization rate is low, the oil-steam ratio is low, and a reservoir stratum is damaged are solved, the heat utilization rate and the oil-steam ratio are increased, and the exploitation effects of a super heavy oil reservoir and a oil sand reservoir stratum are improved.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a dual-horizontal well superheated steam-assisted gravity drainage well pattern, and a dual-horizontal well superheated steam-assisted gravity drainage production method. Background technique [0002] When steam-assisted gravity drainage is used in the oil field, the dryness of the injected steam cannot reach 100%, and the heat loss in the process of steam reaching the bottom of the well from the boiler outlet causes some steam to condense into hot water after reaching the bottom of the well, resulting in a decrease in the oil-steam ratio. On the low side, it affects the effective expansion of the SAGD steam chamber. At the same time, because the high-speed flow of steam in the SAGD process is likely to cause particle migration and throat blockage, the steam condensate injected into the formation will easily cause mineral expansion when it contacts the clay mineral...

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Problems solved by technology

[0003] In order to solve the problem of low efficiency of the existing steam-assisted gravity drainage, the present invention provides a double-horizontal well superheated steam-assisted gravity drainage well pattern and production method. The superheated steam-assisted gravity drainage well pattern and production method of the double-horizontal Steam-assisted gravity drainage, which solves the problems of low heat utilization rate, low oil-steam ratio and reservoir damage in the process of injecting wet saturated steam, improves heat utilization rate, increases oil-steam ratio, and improves super heavy oil Oil reservoir and oil sands reservoir development effect

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