吴起油田楼坊坪油区深层含油层系开发井网密度研究  

Study on development well pattern density of deep oil-bearing strata in Loufangping oil area of Wuqi Oilfield

作　　者：赵阳 高胜利 张小奇 马涛 双立娜 赵小春 齐博 冯全宏 张文奕 ZHAO Yang;GAO Shengli;ZHANG Xiaoqi;MA Tao;SHUANG Lina;ZHAO Xiaochun;QI Bo;FENG Quanhong;ZHANG Wenyi(School of Earth Science and Engineering,Xi’an Shiyou University,Xi’an 700065,China;Wuqi Oil Production Plant of Yanchang Oilfield Co.,Ltd.,Shaanxi Yan’an 716000,China)

机构地区：[1]西安石油大学地球科学与工程学院,西安 [2]延长油田股份有限责任公司吴起采油厂,陕西延安716000

出　　处：《非常规油气》2024年第4期115-120,共6页Unconventional Oil & Gas

基　　金：西安石油大学研究生创新与实践能力培养计划项目(YCS23141001);吴起油田北梁油区综合地质研究项目“吴起采油厂白河北部长8油藏注水开发调整技术与对策研究”(ycsy2022kyC02)。

摘　　要：为了合理高效地开发未动用的长8和长9油层,需要确定1套合理的井网系统,以便积累经验,指导吴起油田其他深层含油区域进行高效合理开发。根据不同流度下井网密度与采收率的相关性,研究区长8和长9油层的井网密度为6.8口井/km^(2);实际上,延长油田西部三叠系已开发油田的井网密度为9.2~18.0口井/km^(2)。考虑到新老井网的衔接,确定长8和长9油层开发井网密度宜在10~15口井/km^(2),以300 m井距部署井网密度较为适合;在分析研究区最大主应力与裂缝走向的基础上,尽可能在原有300 m×300 m正方形井网的基础上进行井网布置,以继承原有井网;采用300×300正方形反九点布井,采用反九点法注水。以上成果对整个吴起油田深层油藏开发具有一定的指导价值。In order to develop the unused Chang8 and Chang9 reservoirs reasonably and efficiently,it is necessary to establish a set of reasonable well pattern system to accumulate experience and guide the efficient and reasonable development of other deep oil-bearing areas in Wuqi Oilfield.According to the correlation between well pattern density and recovery efficiency under different mobility,the well pattern density of Chang8 and Chang9 reservoirs in the study area is 6.8 wells/km^(2).In fact,the well pattern density of the developed Triassic oilfield in the west of Yanchang Oilfield is 9.2~18.0 wells/km^(2).Considering the connection of new and old well patterns,it is determined that the development well pattern density of Chang8 and Chang9 reservoirs should be 10~15 wells/km^(2)and the well pattern density deployed at 300 m well spacing is more suitable.On the basis of the analysis of the maximum principal stress and fracture orientation in the study area,the well pattern plan is deployed on the basis of the original 300 m~300 m square well pattern as far as possible to inherit the original well pattern.300×300 square reverse nine-point well layout is adopted,and the reverse nine-point water injection is adopted.The above results have certain guiding value to the development of deep reservoir in Wuqi oilfield.

关 键 词：井网密度 长9油层 楼坊坪油区 吴起油田 

分 类 号：TE132[石油与天然气工程—油气勘探]