摘要
转向压裂可以增大水力裂缝波及范围和原油与裂缝的接触面积,是低孔低渗油藏的有效开发手段。针对目前转向压裂封堵压力较低,适用于深井转向压裂的暂堵剂研究较少等问题,利用室内实验优选暂堵剂配方,通过数值模拟方法分析配方的压裂效果,并将模拟结果与现场微地震监测数据进行对比。结果表明:单独使用暂堵颗粒无法形成有效封堵,优选复合暂堵剂配方为0.8%纤维+0.5%暂堵颗粒,该配方对孔眼的最高封堵压力为8.7 MPa;优选的转向压裂裂缝体系横向波及宽度与微地震监测结果十分相近,明确了复合暂堵剂的有效性。该研究成果对提高深井转向压裂效果具有一定的指导意义。
Turnaround fracturing can widen the swept scope of hydraulic fractures and the contact area between crude oil and fractures,and it is an effective method to develop low-porosity and low-permeability reservoirs.To address the problems of low plugging pressure of turnaround fracturing and less study on temporary plugging agent suitable for turnaround fracturing of deep wells,the formulation of temporary plugging agent was optimized by laboratory experiment,the fracturing effect of the formulation was analyzed by numerical simulation,and the simulation results were compared with the field microseismic monitoring data.The results showed that no plugging was effective by using temporary plugging particles alone,and the optimized compound temporary plugging agent formulation was 0.8%fiber plus 0.5%temporary plugging particles,with the maximum pressure for borehole plugging of 8.7 MPa;the lateral swept width of the optimized turnaround fracturing system was very similar to the microseismic monitoring results,which clearly demonstrates the effectiveness of the compound temporary plugging agent.There is much for reference of the study results for improving the turnaround fracturing effect of deep wells.
作者
李伟
肖阳
陈明鑫
刘会锋
范文同
黄龙藏
彭芬
曹科学
Li Wei;Xiao Yang;Chen Mingxin;Liu Huifeng;Fan Wentong;Huang Longzang;Peng Fen;Cao Kexue(PetroChina Tarim Oilfield Company,Korla,Xinjiang 841000,China;Chengdu University of Technology,Chengdu,Sichuan 610059,China;Energy New Technologies International,Xi′an,Shaanxi 710000,China)
出处
《特种油气藏》
CAS
CSCD
北大核心
2022年第1期154-159,共6页
Special Oil & Gas Reservoirs
基金
国家科技重大专项“鄂南致密低渗油藏水力压裂裂缝起裂及扩展规律”(2016ZX05048-001-04-LH)
国家自然科学基金青年科学基金“多尺度多场应力耦合致密砂岩体积改造裂缝评价模型研究”(51504042)。
关键词
转向压裂
暂堵剂
深井
低孔低渗
微地震
数值模拟
turnaround fracturing
temporary plugging agent
deep well
low porosity and low permeability
microseismic
numerical simulation
作者简介
李伟(1982-),男,工程师,2006年毕业于长江大学资源勘查工程专业,2009年毕业于该校矿产普查与勘探专业,获硕士学位,现从事储层改造增产技术及地质工程一体化工作。
