A kind of oil recovery method and well pattern

Abstract

The invention discloses an oil production method and a well pattern. The oil production method includes the following steps that a steam injection well is deployed on an oil pool; the bottom of the steam injection well serves as a center of a circle, and a plurality of horizontal producing wells are deployed in a radial pattern; after deploying the plurality of producing wells, steam is injected in the oil pool through the steam injection wall; after the steam injection, oil layers in the oil pool are ignited by an igniter; after the oil layers are ignited, combustion-supporting gases are continuously injected into the oil pool through the steam injection well. According to the method, the development of a fire chamber is no longer in the direction of a single horizontal producing well, and the fire chamber is uniformly developed in the directions of the various horizontal producing wells arranged in a radial pattern, so that the firing range in the whole oil pool is gradually expanded and the probability of flame out is reduced. Meanwhile, flue gases, movable oil, firing lines and the like can move along the plurality of horizontal producing well, and therefore the firing lines uniformly advance towards multiple directions, the swept volume of combustion is enlarged, the exploiting effect is improved, and the oil production efficiency is improved.

Description

technical field [0001] The invention relates to the field of oil recovery technology, in particular to an oil recovery method and a well pattern. Background technique [0002] Burning the oil layer is an oil recovery method that uses electrical or chemical methods to make the temperature of the oil layer reach the ignition point of crude oil, and injects air or oxygen and other combustion-supporting gases into the oil layer to make the crude oil in the oil layer continue to burn. This method is referred to as fire flooding for short. refer to image 3 as well as Figure 4 As shown, at present, the traditional fire flooding oil recovery method is a well pattern pattern in which one steam injection well 1 corresponds to one horizontal production well 2 (THAI technology). This method has only one oil drainage channel along the horizontal production well 2 direction. Fire line 3 is easy to sneak into the oil discharge channel along the direction of the horizontal production w...

AI Technical Summary

Problems solved by technology

The fire line 3 can easily enter the oil drainage channel along the direction of the horizontal production well, thereby burning the oil production device and monitoring equipment in the horizontal production wellbore, resulting in the termination of production

In addition, since there is only one oil drainage channel, the flame can only extend in one direction, and the combustion front will become narrower and narrower, so that the volume of the chamber affected by the combustion of the oil layer will gradually decrease, and the ultimate recovery rate will be low, and the cumulative oil production will be reduced. less

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