济阳页岩油开发“三元”储渗理论技术与实践  

Shale oil development techniques and application based on ternary-element storage and flow concept in Jiyang Depression,Bohai Bay Basin,East China

作　　者：杨勇[1] YANG Yong(Sinopec Shengli Oilfield Company,Dongying 257000,China)

机构地区：[1]中国石化胜利油田分公司,山东东营257000

出　　处：《石油勘探与开发》2024年第2期337-347,共11页Petroleum Exploration and Development

基　　金：中国石化重点科技攻关项目“东营凹陷页岩油有效开发技术”(P21060)。

摘　　要：基于济阳坳陷页岩油储层上万米岩心资料与60余口水平井的开发实践,提出济阳页岩油“储元”、“缝元”、“压元”的“三元”储渗理论。“三元”协同支撑济阳页岩油的富集高产:“储元”控制页岩油的富集,咸化湖盆无机孔-缝及灰-泥优质纹层组构发育利于页岩油储集,高生烃能力、高游离烃含量为高产提供物质基础;“缝元”控制页岩油的渗流,天然裂缝为页岩油的运移和聚集提供渗流通道,压裂改造缝沟通天然裂缝形成复杂缝网,为高产提供渗流基础;“压元”控制页岩油的高产稳产,高地层压力为油气运聚提供原始动力,压裂增能可进一步提高岩石及流体弹性能,强化孔缝原油渗吸置换,减缓应力敏感性,为长期稳产提供能量基础。基于“三元”储渗理论,形成了以立体井网优化、立体均衡压裂、全周期优化调控为核心的立体开发技术,有效指导了现场生产实施,为济阳页岩油规模化效益开发提供技术支撑。The ternary-element storage and flow concept for shale oil reservoirs in Jiyang Depression of Bohai Bay Basin,East China,was proposed based on the data of more than 10000 meters cores and the production of more than 60 horizontal wells.The synergy of three elements(storage,fracture and pressure)contributes the enrichment and high production of shale oil in Jiyang Depression.The storage element controls the enrichment of shale oil;specifically,the presence of inorganic pores and fractures,as well as laminae of lime-mud rocks,in the saline lake basin,is conducive to the storage of shale oil,and the high hydrocarbon generating capacity and free hydrocarbon content are the material basis for high production.The fracture element controls the shale oil flow;specifically,natural fractures act as flow channels for shale oil to migrate and accumulate,and induced fractures communicate natural fractures to form complex fracture network,which is fundamental to high production.The pressure element controls the high and stable production of shale oil;specifically,the high formation pressure provides the drive force for the migration and accumulation of hydrocarbons,and fracturing stimulation significantly increases the elastic energy of rock and fluid,improves the imbibition replacement of oil in the pores/fractures,and reduces the stress sensitivity,guaranteeing the stable production of shale oil for a long time.Based on the ternary-element storage and flow concept,a 3D development technology was formed,with the core techniques of 3D well pattern optimization,3D balanced fracturing,and full-cycle optimization of adjustment and control.This technology effectively guides the production and provides a support to the large-scale beneficial development of shale oil in Jiyang Depression.

关 键 词：济阳坳陷 陆相页岩油 储集空间 压裂改造 裂缝网络 储渗理论 立体开发 高产稳产 

分 类 号：TE132[石油与天然气工程—油气勘探]