摘要
井网加密是油气田开发调整过程中的重要措施之一,所采用的井网井距是否合理直接影响到储量动用程度及最终采收率的大小。从苏里格气田SS-2井区加密前的实际情况出发,应用气藏工程、数值模拟、经济评价等多种方法充分论证了井区加密的可行性,确定了合理的井距和井网密度,优选了加密调整方案。研究结果表明,当储量丰度为1.62×10~8 m^3/km^2时,600m×1200m的基础井网可以通过加密来增加产气量,且加密合理的井网密度为2.8口/km^2。现场实施后效果好,加密井单井日产气、累产气指标达到原井网单井开发指标,工区储量动用程度和最终采收率分别提高23.6%、18.5%。SS-2井区加密成功的经验对苏里格气田其他区块的加密工作及井位部署具有指导及借鉴意义。
Well pattern infilling is one of the important measures in oil-gas field development adjustment process.The rationally of well patterns has directly impact on the extent of reserves and the ultimate recovery rate.Based on the actual production situation before infilling of SS-2 well area in Sulige gas field,the feasibility of the well area infilling is demonstrated by various methods,such as reservoir engineering,numerical simulation and economic evaluation.Reasonable well spacing and well spacing density are determined and infilling adjustment plan is optimized.The effect of field application is favorable,single well daily gas and cumulative gas of infill well reach the single well target of the original well pattern.The reserves producing degree and final recovery rate of the reserves are respectively improved 23.6%,18.5%.
作者
李爽
Li Shuang(Geological Research Institute,Greatwall Drilling of CNPC,Panjin,Liaoning 124010,China)
出处
《非常规油气》
2018年第4期38-42,共5页
Unconventional Oil & Gas
基金
中国石油天然气集团公司工程技术统筹项目"自营区块增产综合技术研究与试验"(2017T-004-001)资助
关键词
致密砂岩气田
苏里格气田
井网加密
数值模拟
采收率
tight sandstone gas reservoir
Sulige gas field
well pattern infilling
parameter optimization
recovery rate
