High-permeability strip judgement method based on HALL curves

Abstract

The invention discloses a high-permeability strip judgement method based on HALL curves. The method comprises the following steps that S1, a double logarithmic curve of a water-oil ratio WOR, a water-oil ratio differential coefficient WOR' and production time of an oil well is drawn; S2, according to the double logarithmic curve, a water channeling type is identified, and a well group area where ahigh-permeability strip possibly exists is found out; S3, the HALL curves are drawn for all water injection wells in the well group area which is found out; S4, a typical HALL curve is determined, and the HALL curves of the actual water injection wells are compared with the typical HALL curve; when the HALL curves of the water injection wells deviate from the typical HALL curve and are lower thanaverage HALL curves of other wells, the water outlet type of the oil well controlled by the water injection well is judged as the high-permeability strip water outlet type. The invention aims at providing the high-permeability strip judgement method based on the HALL curves. The problem that whether or not abnormal water outlet is caused by the high-permeability strip is difficultly determined inthe prior art is solved. The aim of improving the identification accuracy of the high-permeability strip is achieved.

Description

technical field [0001] The invention relates to the field of oilfield development, in particular to a method for judging hyperpermeable bands based on HALL curves. Background technique [0002] The existence of hyperpermeable strips is one of the main reasons for excessive water production in many oilfields during production. Heterogeneous fault-block reservoirs have entered the later stage of development, how to identify high-permeability bands has become the key to improving the development effect of severely heterogeneous reservoirs. The HALL method is a method for evaluating the performance of water injection wells in oilfield water injection development, which is based on steady flow. In the prior art, it is difficult to accurately judge the type of abnormal water production of an oil well and its geological control factors, so it is even more difficult to determine whether the abnormal water production is caused by a high-permeability strip. Contents of the inventio...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for judging hypertonic bands based on HALL curves, to solve the problem in the prior art that it is difficult to determine whether the abnormal effluent is caused by hypertonic bands The problems caused by the problem, to achieve the purpose of improving the identification accuracy of hypertonic bands

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