A reservoir water injection self-adaptive deep overall control device and construction method

Abstract

The invention discloses an oil reservoir water injection self-adaptive deep global regulation device and a construction method. The regulation device comprises agent dissolution and storage equipment and agent injection equipment which is connected with the agent dissolution and storage equipment through a connection pipeline. The agent dissolution and storage equipment comprises a cleaning and unchoking agent dissolution tank, a plurality of regulation agent dissolution tanks, an agent liquid mixer, an agent storage tank and a main liquid intake pipe. The agent injection equipment comprises a main liquid delivery pipe, a plunger pump installed on the main liquid delivery pipe, a liquid distributor connected with a liquid outlet of the main liquid delivery pipe, and a plurality of liquid injection pipes. The construction method includes the following steps that firstly, a well area to be regulated is determined; secondly, the equipment is placed in position and connected through the pipeline; thirdly, water is injected, and a pressure drop curve is tested before regulation; fourthly, cleaning and unchoking are conducted before regulation; fifthly, oil reservoir water injection self-adaptive deep global regulation is conducted on a target stratum. The oil reservoir water injection self-adaptive deep global regulation device is reasonable in design, convenient to install and lay, easy and convenient to operate, good in use effect and capable of effectively improving water displacing oil work efficiency and crude oil recovery efficiency.

Description

technical field [0001] The invention belongs to the technical field of oil field development engineering, and in particular relates to an oil reservoir water injection self-adaptive deep integral control device and a construction method. Background technique [0002] With the development of the petroleum industry, most oilfields have entered the middle and late stage of water flooding development, and the phenomenon of explosive water flooding of oil wells caused by internal water channeling in the formation is becoming more and more serious, which has gradually become one of the technical bottlenecks restricting the sustainable development of old oilfields. At present, at home and abroad, the main method of controlling this problem is the construction method of high-pressure extrusion injection of profile control and flooding agent in water injection wells. Among them, profile control refers to the operation of plugging high-permeability layers from water injection wells, w...

AI Technical Summary

Problems solved by technology

[0003] Conventional profile control and flood control methods have the problem of "either they cannot be injected, or they cannot be plugged, or the oil and water are completely blocked". Near the wellbore area, after the injection pressure of the water injection well increases, the injected water returns to the original water channel through the bypass flow, the effect of oil increase and water control is poor, and the effective period is short

At the same time, the construction equipment used in conventional profile control and flooding technology can only be used for single-well construction of water injection wells, which cannot meet the needs of overall deep regulation and treatment of water injection well areas

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