分段压裂水平井注水开发电模拟实验  

Electrolytic simulation experiment of multi-stage fracturing horizontal well for water flooding development

作　　者：明玉坤 

机构地区：[1]中国石化胜利油田分公司地质科学研究院,山东东营257015

出　　处：《油气地质与采收率》2013年第6期91-93,117,共3页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项"低渗油气田高效开发钻井优化设计技术"(2011ZX05022-001)

摘　　要：为研究分段压裂水平井注水开发增产机理,根据水电相似原理设计了压裂水平井电模拟实验,研究了分段压裂水平井注水开发压力场分布特征和产能影响因素.结果表明,水平井中间有裂缝部分等压线平行分布,渗流方式为单向流,说明分段压裂水平井可通过改善地层渗流方式减小渗流阻力.随着水平段穿透比、裂缝条数（间距）、裂缝穿透比、裂缝与水平段夹角的增大,压裂水平井产能增加;分段压裂水平井注水开发最佳参数组合为：水平段穿透比为0.6～0.8,裂缝条数为6（裂缝间距为91m）,裂缝穿透比为0.25～0.3,裂缝与水平段夹角为90°,井网选用排列交错井网;其对分段压裂水平井产能影响的极差分别为0.030,0.024,0.018,0.018和0.004.矿场应用表明,分段压裂注水开发水平井产能为同条件下直井的2倍,是低渗透油藏的有效开发方式.In order to study the production stimulation mechanism of water flooding by multi-stage fracturing horizontal well, the electrolytic simulation experiment of fractured horizontal well is designed according to the water and electricity resembling principle, and the pressure distribution and the productivity influence factors are studied. The experiment results show that the pressure contour is distributed in parallel in the middle of horizontal which has the fracture, and the fluid flow is unidirectional, it shows that the multi-stage fracturing horizontal well can improve the fluid flow characters and decrease the percolating resistance. The horizontal productivity can be enhanced by increasing the horizontal penetration ratio, the fracture numbers and penetration ratio, the angle between horizontal and fracture. The best parameters are as follows: the horizontal penetration ratio is 0.8, the fracture numbers are 6(the space between fractures is 91 m), the fracture ratio is 0.25, the angle between the fracture and the horizontal section is 90 degree. The well pattern is staggered line-drive well network, and the ranges of those parameters which have effect on the productivity are 0.032, 0.024, 0.018, 0.018 and 0.004. The field application showed that the productivity of multi-stage fracturing horizontal well is 2 times than that of vertical well, and it is the effective development style for low permeability reservoir.

关 键 词：分段压裂 水平井 注水开发 电模拟实验 产能 

分 类 号：TE34[石油与天然气工程—油气田开发工程]