七里村油田一层多缝压裂工艺设计

通过对七里村油田4口压裂井微地震检测分析,确定该油田水力压裂裂缝为水平缝,适合一层多缝压裂.通过对已压裂的一层一缝、一层两缝和一层三缝的压裂井产量统计分析,结合当前压裂施工工艺,利用以前压裂施工统计数据并配合软件模拟,对一层两缝压裂工艺的裂缝长、施工排量和加砂规模等压裂参数进行优选,最终确定七里村油田最优压裂参数为:裂缝长度35～42 m,加砂规模19.23～27.69 m3,施工排量1.8～2.2 m3/min,携砂液量64.10～92.30 m3等.通过对一层两缝试验井与一层一缝压裂以及优化前的一层两缝压裂井产量比较,结果表明参数优化后一层两缝压裂可以大幅提高油井产量和稳产产量,更适合于七里村油田.

Design of multi-fracture fracturing technology in one oil layer in Qilicun Oilfield

It is determined that the hydraulic fracturing fractures of Qilicun Oilfield are in horizontal direction by the micro seismic detection analysis of four fractured wells,so the multi-fracture fracturing technology in one oil layer is suitable to Qilicun Oilfield.According to the statistical analysis of the yield of the fractured wells with one-fracture,two-fracture and three-fracture in one layer and the current fracturing construction technology,the parameters of the two-fracture fracturing technology in one layer,such as the fracture length,construction flow rate,sand amount,etc.,are optimized by means of previous fracturing operation statistical data and simulation software.The main optimal fracturing parameters of Qilicun Oilfield are determined as following: fracture length is 35～42 m,construction flow rate is 1.8～2.2 m3/min,and sand amount is 64.10～92.30 m3.The yields of the two-fracture well with optimized fracturing parameters,one-fracture well of not optimized fracturing parameters,two-fracture well of not optimized fracturing parameters are compared,and it is shown that,two-fracture well of optimized fracturing parameters has the highest yield and stable yield,which proves the multi-fracture fracturing technology in one oil layer is suitable to Qilicun Oilfield again.