Abstract
Two horizontal wells have been put into operation in the Mahu 1 well area, the difference in geology and engineering between Mahu 1 well area and Ma 18 and Ma 131 well area is small, but the pressure and output drop rapidly after putting into production. Aiming at this problem, the micro-mechanism analysis is carried out, through the analogy with the neighboring area, and the reasonable shut in time is calculated through the derivation of theoretical infiltration rate formula. The results show that the reasonable closing time after horizontal well fracturing in the Mahu 1 well area is 18 days. Through the analysis of the mine test, the infiltration method and pressure drop method can accurately predict the reasonable shut-in time after fracturing, the research results have played a good guiding role in the production of horizontal well volume fracturing.
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