Super-heavy-oil oil reservoir mining mechanism and method

Abstract

The invention discloses a super-heavy-oil oil reservoir mining mechanism, and further discloses a mining method using the mining mechanism. The super-heavy-oil oil reservoir mining mechanism comprisesat least one mining set, and each mining mechanism comprises horizontal wells and vertical wells; each horizontal well comprises an upper horizontal well body and a lower horizontal well body and isprovided with a horizontal section and a vertical section; the vertical wells are arranged nearby the horizontal wells; and microwave transmitting devices and microwave reflecting devices are mountedon the outer sides of the well walls of the vertical wells, and microwaves are reflected in a reciprocating mode between the microwave reflecting devices between every two vertical wells. The mining method comprises the steps that a formation is subjected to microwave preheating, steam is injected, and an initial production stage is started; and in the mining process, the formation is heated at any time according to needs. The super-heavy-oil oil reservoir mining mechanism and the mining method have the beneficial effects that using of the steam amount is reduced, and the mining cost is reduced; the formation can be quickly preheated, the time for breaking through a mining channel is shortened, and meanwhile, the mining amount in unit time is increased; the formation heating range is wider; and the formation temperature is monitored at any time, the microwave power is adjusted, thus a steam cavity is developed according to the given position, size and shape, and the steam cavity is evenly expanded.

Description

technical field [0001] The invention relates to the field of super-heavy oil exploitation, in particular to a super-heavy oil reservoir exploitation mechanism and a exploitation method using the exploitation mechanism. Background technique [0002] Steam Assisted Gravity Drainage (SAGD) technology has been successfully applied in heavy oil reservoirs in Canada's oil sands mining area, my country's Liaohe Oilfield, Xinjiang Oilfield and other places. The principle is to deploy two parallel horizontal wells up and down in the same oil layer, inject high-quality steam into the upper steam injection well, and the steam will overlap upwards in the formation to form a steam cavity. With the continuous injection of steam, the steam cavity will continue to expand upwards and laterally. , to exchange heat with the crude oil in the oil layer. The viscosity of the heated crude oil is reduced, and the condensed water flows downward under the action of gravity, and is extracted from the...

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Problems solved by technology

However, this scheme has a small circulation preheating range, and the temperature of the area above the horizontal well net is also unknown

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