METHOD FOR DISTRIBUTING ACID ON BASIS OF DISTRIBUTION CHARACTERISTICS OF SKIN COEFFICIENT OF HORIZONTAL WELL

摘要

A method for distributing acid on the basis of distribution characteristics of a skin coefficient of a horizontal well, comprising the following steps: 1) establishing a single-well geological model under initial conditions; 2) on the basis of the single-well geological model constructed in step 1), calculating a single-well geological model after drilling damage; 3) on the basis of the single-well geological model constructed in step 1), calculating a horizontal well fluid production profile before drilling damage; 4) on the basis of the single-well geological model after drilling damage calculated in step 2), calculating a horizontal well fluid production profile after drilling damage; 5) according to the horizontal well fluid production profile before drilling damage obtained in step 3) and the horizontal well fluid production profile after drilling damage obtained in step 4), calculating skin coefficients at different positions along an entire horizontal well section; and 6) according to distribution characteristics of the skin coefficients along the horizontal well section, calculating acid distribution amounts at different positions of the horizontal well. The method for distributing acid solves the problems of low acidification efficiency and a poor acidification effect caused by existing blind acid distribution.