致密油压裂井回流加砂压井技术研究  

Study on the Well Killing Technology of Back Flow and Sand Injection in Tight Oil Pressure Fractured Wells

作　　者：安宏鑫 曹广胜[1] 白玉杰[1] 孟凡嵩 AN Hong-xin;CAO Guang-sheng;BAI Yu-jie;MENG Fan-song(Key Laboratory of Enhanced oil and gas recovery of Ministry of Education,Northeast Petroleum University,Daqing 163318,China)

机构地区：[1]东北石油大学提高油气采收率教育部重点实验室,大庆163318

出　　处：《当代化工》2021年第8期1883-1887,共5页Contemporary Chemical Industry

基　　金：国家自然科学基金,活性原油在非均质储层中的自适应控水增油机理(项目编号:51574089)。

摘　　要：致密储层由于其低孔低渗特征,需要使用大规模的体积压裂技术以增加产量。在大量的压裂液和支撑剂的注入过程中,一旦发生溢流,常规的压井液很难控制溢流情况。针对以上问题,开展了大规模体积压裂井回流加砂技术的研究,分析了加砂压井的可行性,优化了加砂压井的技术参数。结果表明:加砂压井砂砾极限目数为80目(0.180 mm),采用中心管法后可增至260目(0.066 mm),并且出口速度降至0.15 m·s^(-1),使在高溢流速度下加砂压井具有可行性。Because of low porosity and low permeability, large-scale volume fracturing technology is needed to increase production in tight reservoirs. In the process of a large number of fracturing fluid and proppant injection, once overflow occurs, it is difficult to control the overflow with conventional well killing fluid. In view of the above problems, a large-scale volume fracturing well backflow sanding technology research was carried out, the feasibility of sand killing well was analyzed, and the technical parameters of sand injection and killing well were optimized. The results showed that the limit mesh size of sand injection and killing well was 80 mesh, which could be increased to 260 mesh by using central tube method, and the outlet velocity was reduced to 0.15 m·s^(-1), which made it feasible to add sand and kill well at high overflow velocity.

关 键 词：压裂回流 压井 颗粒流动特征 

分 类 号：TE357.13[石油与天然气工程—油气田开发工程]