Application of Pre-fracturing Evaluation for Fracturing Well in Block Gu-137 of Puxi Oilfield

As post-fracturing production of Block Gu-137 in Puxi Oilfield could not meet the economic development standards of fracturing production,this paper analyzed and appraised the reason for past inefficient fracturing from three factors influencing hydraulic fracture height,including fracturing fluid system,proppant optimization and ground stress on vertical section.Through optimization of above factors,we determined fracturing operation scale,increased the near well bore diversion ability according with the fracturing design of operation parameters under the idea oftwo low and two high,which can enhance flow back rate of fracturing fluid with capsule breaker and binary breaker system used to trace conventional breaker,and decrease damage of fracturing fluid to reservoir and fracture flow conductivity.On-site fracturing test for 11 wells was performed at the end of 2004 and it has obtained pretty good results,proving the necessary technology guarantee for the sequent fracturing of development well in this block.