复杂构造带常压页岩气开发刻度区建立及其意义  

Establishment of calibrated area of normal pressure shale gas development in complex structure belts and its significance

作　　者：何希鹏[1,2] 王凯 何贵松[2,3] 马军 龙志平[4] 张志萍[3] 雷林 李彦婧[3] HE Xipeng;WANG Kai;HE Guisong;MA Jun;LONG Zhiping;ZHANG Zhiping;LEI Ling;LI Yanjing(Sinopec East China Oil and Gas Company,Nanjing,Jiangsu 210019,China;State Key Laboratory of Shale Oil&Gas Enrichment Mechanisms and Efficient Development,Nanjing,Jiangsu 210019,China;Exploration and Development Research Institute,Sinopec East China Oil and Gas Company,Nanjing,Jiangsu 210019,China;Institute of Petroleum Engineering Technology,Sinopec East China Oil and Gas Company,Nanjing,Jiangsu 210019,China)

机构地区：[1]中国石化华东油气分公司 [2]页岩油气富集机理与高效开发全国重点实验室 [3]中国石化华东油气分公司勘探开发研究院 [4]中国石化华东油气分公司石油工程技术研究院

出　　处：《天然气工业》2025年第3期16-35,共20页Natural Gas Industry

基　　金：中国石化科技部项目“渝东南地区浅层页岩气勘探开发关键技术”(编号:P24115)、“南川—武隆地区常压页岩气富集高产机理与目标评价”(编号:P21087-6)。

摘　　要：复杂构造带常压页岩气效益开发难度高于高压页岩气,其勘探开发程度总体较低,亟需建立该类页岩气资源开发刻度区,为相似地区页岩气资源开发提供重要借鉴。为此,以四川盆地东南缘平桥构造带常压页岩气为研究对象,系统梳理和剖析了该区关键地质参数、开发技术政策、钻完井工艺、压裂工艺及生产特征,并将其建立为常压页岩气开发刻度区,确定了常压页岩气开发的关键参数和配套工程工艺技术。研究结果表明:(1)平桥构造带上奥陶统五峰组—下志留统龙马溪组一段页岩有利层段具有良好的页岩气成藏条件,压力系数为1.0~1.35,处于高压—常压过渡区,整体勘探程度高、资料丰富、构造清晰、气藏类型丰富、单井生产时间长、页岩气富集高产规律明确,具备建立常压页岩气开发刻度区的良好条件;(2)基于地层压力与构造应力场细化了3个开发单元,建立了差异化开发技术政策、钻完井和压裂对策,各单元生产特征表现出明显的差异性;(3)阳春沟构造带邻近平桥构造带,优质页岩地质静态指标与之相当,推广应用平桥开发刻度区形成的相关技术政策,开发效果较好,单井估算最终可采储量较高,经济效益良好,已取得较好的应用效果。结论认为,复杂构造带常压页岩气开发刻度区的建立,进一步丰富和完善了页岩气的评价开发内涵,对于加快同类区块页岩气勘探开发进程、提高低勘探开发程度区页岩气勘探开发成效具有重大意义。The profitable development of normal pressure shale gas in complex structure belts is more challenging than that of high-pressure shale gas,and the exploration and development degree is overall lower.Therefore,it is in urgent need to establish a calibrated area of normal pressure shale gas resource development to provide reference for the development of shale gas resources in the similar areas.Taking the normal pressure shale gas in the Pingqiao structure belt along the southeastern margin of the Sichuan Basin as the research object,this paper sorts out and analyzes the key geological parameters,development technological policies,drilling and completion technologies,fracturing technologies and production characteristics.In addition,a calibrated area of normal pressure shale gas development is established,and the key parameters and supporting engineering technologies of normal pressure shale gas development are determined.The following results are obtained.First,there are good shale gas accumulation conditions in the favorable shale intervals of Upper Ordovician Wufeng Formation-Lower Silurian Longmaxi Formation in the Pingqiao structure belt.The formation pressure coefficient is in the range of 1.0–1.35,indicating it is in the high-normal pressure transition area.It is characterized by high exploration degree,abundant data,clear structures,abundant gas reservoir types,long single well production time,and determined laws of shale gas enrichment and high yield,which provide good conditions for establishing a calibrated area of normal pressure shale gas development.Second,based on formation pressure and tectonic stress field,three development units are defined.Differentiated development technological policies and drilling,completion and fracturing countermeasures are prepared correspondingly,so that each unit exhibits obvious differences in production characteristics.Third,the Yangchungou structure belt is adjacent to the Pingqiao structure belt,and the static geological indicators of high-quality shale in the Yan

关 键 词：四川盆地 南川地区 五峰组—龙马溪组 构造复杂带 常压页岩气 刻度区 平桥构造带 开发评价 

分 类 号：TE37[石油与天然气工程—油气田开发工程]