陆相页岩油甜点参数测井定量评价方法及应用  

Logging Quantitative Evaluation Method of Sweet Spot Parameters in Continental Shale Oil and Its Application

作　　者：肖毓祥[1] 冯庆付[1] 侯秀林[1] 雷启鸿[2] 陈波[2] 韩珊 XIAO Yuxiang;FENG Qingfu;HOU Xiulin;LEI Qihong;CHEN Bo;HAN Shan(Research Institute of Petroleum Exploration and Development of PetroChina,Beijing 100080,China;PetroChina Changqing Oilfield Company,Xi′an,Shaanxi 710018,China)

机构地区：[1]中国石油勘探开发研究院 [2]中国石油长庆油田公司

出　　处：《钻采工艺》2024年第6期125-133,共9页Drilling & Production Technology

基　　金：科学研究与技术开发两性项目(部级)“页岩油气富集机理与储层地质力学评价技术研究”(编号:2024DJ87)。

摘　　要：中国陆相页岩油储层按照沉积特征及生储组合关系分为夹层型、混积型和泥纹型3种类型,根据不同主控因素和面临的开发难点,可分为复杂构造影响型、储层强非均质型、高黏土难改造型、高黏油难流动型和低含油饱和度型5种类型。不同类型储层高产稳产的主控因素差异性大,甜点纵横向精细刻画、富集规律及展布特征是规模效益开发的关键。通过建立矿物组分、孔隙度、力学及脆性计算模型,结合直井试油和水平井生产动态资料,优选不同类型储层产能主控因素和核心参数,建立甜点分类评价标准,优选储层甜点段。综合分析表明,陆相页岩油优质甜点多为中、高TOC背景下,核磁大孔隙发育、页理缝有效性好(裂缝发育)的油气富集层,并具有良好顶板封盖条件。研究成果已经在多个油田的页岩油水平井靶窗优选和随钻跟踪中得到应用,可为页岩油勘探开发提供理论指导与技术支撑。The continental shale oil reservoirs in China are divided into three types according to their sedimentary characteristics and hydrocarbon accumulation relationships:interbedded type,mixed type,and clay lineation type.Furthermore,considering the dominant control factors and associated development challenges,these reservoirs can be subdivided into five categories:complex structural influence type,highly heterogeneous reservoir type,high clay modification difficulty type,high viscosity oil flow difficulty type,and low oil saturation type.The primary control factors influencing high yield and stable production vary significantly across different reservoir types;thus,a detailed characterization of sweet spots in both horizontal and vertical dimensions-along with an understanding of enrichment patterns and distribution characteristics-is crucial for large-scale efficient development.In this paper,by establishing the calculation model of mineral composition,porosity,mechanics and brittleness,integrating with data from vertical well tests and dynamic production from horizontal wells,and optimizing the main control factors and core parameters of different types of reservoir productivity,the classification and evaluation criteria of sweet spots are established for its selection in reservoir.Comprehensive analysis indicates that high-quality sweet spots in continental shale oil predominantly occur within middle to high total organic carbon(TOC)backgrounds characterized by significant pore development as observed through nuclear magnetic resonance techniques along with effective fracture networks(Fracture development).These areas also exhibit favorable cap rock sealing conditions.The findings have been extensively applied in target window selection and drilling monitoring of horizontal wells across multiple oilfields,providing theoretical guidance and technical support for shale oil exploration and development.

关 键 词：陆相页岩油 甜点 矿物含量 孔隙度 脆性指数 水平井靶窗 

分 类 号：TE321[石油与天然气工程—油气田开发工程] P631.81[天文地球—地质矿产勘探]