复合射孔压裂效果评价方法研究进展

Progress in Evaluation Methods of Combined Perforation Fracture Effectiveness

复合射孔压裂效果评价是复合射孔技术的重要组成部分。为适应不同条件油气层复合射孔压裂的要求,经过10多年发展,先后形成了地面混凝土靶射孔试验、室内砂岩靶模拟压裂试验、室内模拟射孔压裂试验、数值模拟等一系列复合射孔压裂能力效果分析评价方法,提高了优化设计水平和施工效果;通过合理控制高能气体峰值压力,保护了油层套管、水泥环。复合射孔压裂研究和效果评价方法在不断发展和完善,应充分结合油气层特点,开展模拟围压的复合射孔压裂试验、数值模拟以及试验及井下监测结合研究。

Evaluation of combined perforation fracture effectiveness is an important part of combined perforation technologies . To meet the requirements of combined perforation fracture under the conditions of different reservoir feature ,a series of evaluation methods of combined perforation fracture effectiveness has been established with over 10 years of development ,such as outdoor perforation testing with concrete targets ,simulation fracturing laboratory testing with sandstone targets ,simulation perforation fracturing laboratory testing and numerical simulation . The methods benefit improving design level and construction effect , and can also protect production string or cement sheath through reasonable controlling the peak pressure of high energy gas .Meanwhile ,for combined perforation fracture ,scientific research and evaluation methods of effectiveness are still evolving and improving . During the developing process mentioned above , scientific research on combined perforation fracture testing of simulating confining pressure ,numerical simulation ,relevant experiments and dow nhole monitoring should be combined on the basis of reservoir feature .