With-production without-injection-type isolated well point potential tapping and effect raising method

Abstract

The invention relates to a with-production without-injection-type isolated well point potential tapping and effect raising method, which mainly solves the problem of poor developing and potential tapping effects as the existing with-production without-injection-type isolated well point is imperfect in production and injection and has no external energy source. The method is characterized by comprising the following steps: (1) a target well is optimally selected: based on the position of the isolated well point and in combination of cementing quality, perforation interpretation data, fine reservoir description results, fine residual oil research results, reservoir use condition evaluation data and the like, a target well is selected comprehensively and optimally; (2) the potential tapping time for the target well is determined: according to the dynamic development trend of the target well, a decline rule and the current production condition, the potential tapping time is determined, andpotential tapping is selected to be developed at the time when the fluid volume declines quickly and the fluid supply drops near shortage; (3) section optimization is carried out on the target well;(4) a potential tapping scheme is determined; and (5) field construction is carried out. The method can solve the problem that the isolated well is short of energy, and can thus realize the purpose ofimproving the remaining reserve recovery degree of the isolated well.

Description

Technical field: [0001] The invention relates to the technical field of petroleum exploitation, in particular to a method for tapping the potential and improving efficiency of an isolated well point with production but without injection. Background technique: [0002] Well pattern injection and production is the main method for the development of large oilfields in China, that is, the injection wells and production wells are drilled according to a certain row spacing and regular spacing during the well layout, and then fluids such as water or polymers are injected through the injection wells, and the oil and water wells are separated. After the displacement is established, the displaced crude oil is produced at the production well end. However, in some non-integrated reservoirs, due to the constraints of fault blocking, narrow sand body development, and isolated sand bodies, it is impossible to arrange regular injection-production well patterns, and only production wells can...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at overcoming the problem in the background technology that the existing isolated well point with production without injection has poor development potential tapping effect due to imperfect injection and production and no external energy source, and provides a type of isolated well point with production without injection Ways to Tap Potential and Improve Efficiency

The method of tapping the potential of the isolated well point with production without injection can solve the problem of "lack of energy" in the isolated well point, and inject a large volume of oil displacement fluid into the formation through fracturing to supplement energy, so that the displacement fluid and the original fluid in the formation Displacement occurs, and at the same time, sand is added to support the formation of seepage channels with high conductivity after the injection of the flooding fluid, so as to achieve the purpose of improving the recovery of the remaining reserves of isolated well points

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