PERFORMANCE ANALYSIS METHOD FOR ESTIMATING HYDRAULIC FRACTURE AZIMUTH IN COMPLEX FAULT BLOCK SANDSTONE RESER-VOIR

Took fault block Ar-11 of Arnan oilfield in Erlian region as an example, took injector-producer group as a research object,applied comprehensively the injectionproduction performance curve analysis method,with the help of working fluid level,production data and reserve-percolation property parameters,etc.,deduced from percolation mechanism that the main sweep direction of the injected water was the azimuth of the minimum horizontal main stress, then, deduced the azimuth of the hydraulic fracture. Verified from drilling deviation deduction method and reservoir numerical simulation method,the performance analysis method for estimating hydraulic azimuth was reliable and operable. It has provided new thought and method for the optimizing design of fracturing and for the adjustment and perfection of water flood development well pattern.