Enhanced oil recovery method for fault-block reservoirs in ultra-high water-cut period

Abstract

The invention provides a method of increasing recovery through ultra-high water cut stage fault block oil reservoir zoning regulation and control. The method of increasing recovery through ultra-high water cut stage fault block oil reservoir zoning regulation and control includes the steps that 1, zone structural geology features and well pattern evolution features are analyzed and researched; 2, reasonable zoning research is carried out through complex remaining oil features and influence factors, typical fault block oil reservoir plane water flooding effect difference and influence factors are analyzed, and an ultra-high water cut stage fault block oil reservoir zoning scheme is formulated comprehensively; 3, a numerical simulation means or oil reservoir engineering method is adopted, development contradictions of all zones are determined, zoning regulation and control technological policy optimization is carried out, and zoning injection and production regulation and control scheme is executed to optimize the design. The method of increasing recovery through ultra-high water cut stage fault block oil reservoir zoning regulation and control is clear in technical idea and simple in application, and a feasible method is provided for effective potential digging of ultra-high water cut stage complex fault block remaining oil in the later stage of production.

Description

technical field [0001] The invention relates to the technical field of development of fault block reservoirs, in particular to a method for increasing the recovery rate by utilizing the regional injection-production regulation and development technology to solve the problem of unbalanced plane injection-production degree in the ultra-high water-cut period of fault-block reservoirs. Background technique [0002] The complex Type II fault-block reservoirs in Shengli Oilfield generally have a certain oil-bearing area (the main block contains an area greater than 0.5 km 2 ), which can form a relatively complete injection-production well pattern. In the rolling development process, the water flooding development method of low injection and high production well pattern and gradual inward movement of oil-water well row is usually adopted. After many years of development, this kind of fault-block oilfield has entered the stage of ultra-high water cut. Affected by factors such as fau...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method to solve the problem of unbalanced and increasingly serious differentiation of plane injection-production production in the adjustment research of fault-block reservoir development in the ultra-high water-cut period, and to further improve the recovery rate by using the zoned injection-production control technology. Enhanced oil recovery method for fault-block reservoir zone regulation

Images