安棚深层系致密砂岩油藏水平井压裂参数优化设计研究  

Optimal design of horizontal well fracturing parameters in Anpeng deep tight sandstone reservoir

作　　者：黎明[1] 韩丰华 王肃 王俊[1] 安超 LI Ming;HAN Fenghua;WANG Su;WANG Jun;AN Chao(Exploration&Development Research Institute of Henan Oilfield Company,SINOPEC,Zhengzhou,Henan 450048,China)

机构地区：[1]中国石化河南油田分公司勘探开发研究院,河南郑州450048

出　　处：《石油地质与工程》2020年第2期104-108,共5页Petroleum Geology and Engineering

摘　　要：安棚油田储层致密低渗,物性差、渗流阻力大,自然产能低,采用常规直井进行开采,初期产能低,产量递减快。基于对安棚深层储层地质特征的认识,在致密砂岩渗流试验的基础上,考虑致密砂岩储层的冲击压力梯度和储层应力敏感性,建立了大型储层数值模拟模型,优化水平井的裂缝条数、长度和导流能力等参数。采用"不等长布缝"和"不等量注水"的优化思路,降低水平井注采井网的水窜风险,最终得到了合理的水平井裂缝设计参数和井网。结果表明,优化后的井网获得了较高产能,也推迟了水平井的见水时间,改善了分段压裂水平井的开发效果。Anpeng oilfield is characterized by tight and low permeability reservoirs,poor reservoir physical properties,high seepage resistance and low natural productivity.Through conventional vertical wells for production,the initial production capacity is low and the production decreases rapidly.Based on the understandings of geological characteristics of Anpeng deep reservoir,considering the impact pressure gradient and reservoir stress sensitivity of tight sandstone reservoir,a large reservoir numerical simulation model was established to optimize the parameters,such as fracture numbers,fracture length and fracture conductivity of horizontal wells.At the same time,"unequal length distribution of fractures"and"unequal injection"were adopted to reduce the risk of water breakthrough in injection-production well pattern of horizontal wells,and finally the reasonable design parameters and pattern of horizontal well fracturing were obtained.The results show that the optimized well pattern not only obtains higher productivity but also delays the water breakthrough time of horizontal wells,which greatly improves the development effect of fractured horizontal wells.

关 键 词：安棚深层系 致密砂岩 大型压裂水平井 水平井参数优化 

分 类 号：TE355[石油与天然气工程—油气田开发工程]