Hot exploitation method for exploiting gas-cap super-heavy oil reservoirs

Abstract

The invention provides a hot exploitation method for exploiting gas-cap super-heavy oil reservoirs; the method comprises the steps of screening out an oil reservoir, deploying a well network, carrying out steam huff-puff, and combusting an oil layer and injecting air. According to the hot exploitation method for exploiting gas-cap super-heavy oil reservoirs, the techniques such as SAGD (steam-assisted gravity drainage), in-situ combustion of oil and gas-assisted SAGD are effectively combined and used in gas-cap heavy oil reservoirs, and low-cost high-benefit exploitation is achieved. The method has the advantages that steam usage can be reduced, crude oil quality can be improved, a gas drainage passage can be enlarged, crude oil can also be pressurized into a horizontal production well through gas-cap expansion, accelerated oil drainage and reduced production cost are achieved, and good economic benefit is provided.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a thermal recovery method for exploiting gas-capped ultra-heavy oil reservoirs. Background technique [0002] SAGD (Steam Assisted Gravity Drainage) is a cutting-edge technology for developing heavy oil. This technology requires continuous injection of high-dryness steam. The higher the dryness of the steam, the more obvious the oil recovery effect, and the formed steam cavity continues to expand. The oil layer is heated and crude oil is extracted together with condensed water. At present, heavy oil reservoirs are exploited by SAGD technology, which requires a large amount of steam and high cost. How to effectively reduce the amount of steam and increase oil production is the key to reducing production costs and improving economic benefits. [0003] Name explanation: [0004] Burning oil layer: A heavy oil thermal recovery technology that injects air into the oil...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the ultra-heavy oil reservoir with a gas cap is difficult to exploit, the present invention provides a thermal recovery method for exploiting an ultra-heavy oil reservoir with a gas cap. Methods Through the effective combination of SAGD, oil layer combustion, gas-assisted SAGD and other technologies, they are applied to heavy oil reservoirs with gas caps to achieve low-cost and high-yield development

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