Method for exploiting heavy oil reservoir with edge water invasion in final huff and puff stage

Abstract

The invention discloses a method for exploiting a heavy oil reservoir with edge water invasion at a final huff and puff stage. The exploiting method includes the steps that a steam flooding well pattern is deployed in a main body non-water-invasion area, and a fire flooding well pattern is deployed in an edge water invasion area; the joint of the steam flooding well pattern and the fire flooding well pattern is separated by a production well row; and steam flooding and fire flooding development are carried out at the same time. According to the method for exploiting the heavy oil reservoir with the edge water invasion at the final huff and puff stage, the edge water invasion area can be effectively utilized, the edge water invasion can be inhibited by utilizing the plugging effect of a fire flooding high-temperature combustion front edge on a high-permeability layer and the vaporization effect of the high-temperature combustion front edge on water, and the main body steam flooding heat utilization rate is improved, so that the steam flooding development effect is improved, the overall development level of a block is improved, and the problem that continuous development is difficult due to the fact that no effective conversion mode exists when edge water invades into the heavy oil reservoir in the final huff and puff stage is solved.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a mining method for edge water intrusion into a heavy oil reservoir at the end of huff and puff. Background technique [0002] The heavy oil reservoirs at the end of the huff and puff period are already in the later stage of development after undergoing multi-stage exploitation in the early stage. There are problems such as high recoverable reserves, low formation pressure, and edge water intrusion. Edge water gradually intrudes into the block. The comprehensive water content of the block is extremely high, and there is an urgent need for mode conversion. For example, Block Qi 108 in Liaohe Oilfield is an interbedded ordinary heavy oil reservoir with edge water; after nearly 30 years of steam huff and puff development, this block has undergone overall deployment to increase production in batches, expand borders, increase reserves and stabilize production, and impro...

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Problems solved by technology

[0005]The purpose of the present invention is to provide a method for mining heavy oil reservoirs with edge water intrusion at the end of huff and puff, so as to solve the problem of steam flooding heat utilization in heavy oil reservoirs caused by edge water intrusion low efficiency, poor steam flooding effect and low recovery

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