薄层生物礁滩灰岩储层一体化表征研究——以珠江口盆地A油田为例  

Integrated Characterization of Thin Reef Bank Limestone Reservoir—A Case Study of Oilfield A in Pearl River Mouth Basin

作　　者：孙润平 蒋鏖 汤小龙 吴雪晴 徐伟 王秀玲 Sun Runping;Jiang Ao;Tang Xiaolong;Wu Xueqing;Xu Wei;Wang Xiuling(Shenzhen Branch,CNOOC China Limited,Shenzhen Guangdong 518054)

机构地区：[1]中海石油(中国)有限公司深圳分公司,广东深圳518054

出　　处：《中外能源》2021年第5期38-43,共6页Sino-Global Energy

摘　　要：以珠江口盆地A油田生物礁滩储层为研究对象,针对开发初期钻井资料少而储层厚度薄、横向变化快、孔隙度-渗透率关系多样的情况,提出了一种基于地震、测井、岩心资料的一体化储层表征技术。通过对储层沉积特征、岩性、物性进行精细描述,明确了生物礁滩储层类型;以地质模式为指导,采用相控地质统计学反演精细预测了薄层甜点储层的井间展布,为地质模型的建立提供了有效的地震约束;通过多点地质统计学岩相模拟与相控地震约束联合建模,定量刻画了薄层生物礁滩灰岩的岩相、物性三维展布,实现了沉积模式指导下的岩相建模及多种孔隙度-渗透率关系的定量表征。研究表明,油田甜点储层分布较局限,主要位于油田中部构造高部位的生物礁、生物滩储层中,该方法能定量化表征薄层礁滩灰岩的空间展布,提高油藏描述的精度,为油田的下一步开发提供了地质依据。Organic reef bank reservoir in Oilfield A of Pearl River Mouth Basin is studied as an object.An integrated reservoir characterization technology based on seismic,well logging and core data is proposed to deal with the situation of few drilling data in the early stage of development for thin reservoir,fast lateral change and diverse porosity-permeability relationship.Based on the detailed description of the sedimentary characteristics,lithology and physical properties of the reservoir,the type of reef bank reservoir is defined.Under the guidance of the geological model,the interwell distribution of the thin sweet spot reservoir is accurately predicted by using the facies-controlled geostatistics inversion,which provides effective seismic constraints for the establishment of the geological model.Through combining multi-point geostatistics lithofacies simulation with facies-controlled seismic constraint modeling,the three-dimensional distribution of lithofacies and physical properties of thin organic reef bank limestone is quantitatively described,and the lithofacies modeling and the quantitative characterization of various porosity-permeability relationships are realized under the guidance of sedimentary model.The research shows that the sweet spot reservoir is limited on distribution,mainly located in the organic reef and biological bank reservoir at the high position of the central structure of the oilfield.This method can quantitatively characterize the spatial distribution of thin reef bank limestone reservoir,improve the accuracy of reservoir description,and provide geological basis for the next development of the oilfield.

关 键 词：礁滩灰岩 一体化储层表征 多点地质统计学 相控建模 珠江口盆地 

分 类 号：P618.13[天文地球—矿床学]