新疆陆梁油田LU9井区三角洲前缘河口坝砂体构型研究  

Quantitative Characterization of Reservoir Configuration of Delta Front Estuary Bar in LU9 Well Area of Luliang Oilfield,Xinjiang

作　　者：段野 王瀚卿 王春伟 Duan Ye;Wang Hanqing;Wang Chunwei(Xinjiang Shenergy Petroleum Co.LTD.,Shanghai,200041,China;Exploration and Development Research Institute of PetroChina Huabei Oilfield Company,Renqiu,Hebei,062552,China;Institute of Geological Measurement and Control Technology,Sinopec Jingwei Co.,LTD.,Qingdao,Shandong,266000,China)

机构地区：[1]新疆申能石油天然气有限公司,上海200041 [2]中国石油华北油田分公司勘探开发研究院,河北任丘062552 [3]中石化经纬有限公司地质测控技术研究院,山东青岛266000

出　　处：《新疆地质》2025年第1期89-96,共8页Xinjiang Geology

基　　金：国家重点研发计划项目油/水/固界面浸润调控智能流体提高采收率关键材料与机理研究(2019YFA0708700)项目资助。

摘　　要：三角洲前缘河口坝砂体是我国最主要的油气储层之一,其砂体内部结构控制着流体的分布特征及运动规律,因此开展河口坝砂体构型研究对油气田高效开发具重要意义。以钻井、测井、岩心分析及生产动态资料为基础,通过研究陆梁油田LU9井区主力油层沉积特征及储层结构,明确了储层的成因类型,划分了砂体构型界面,定量阐述了砂体构型单元特征,归纳了河口坝沉积模式。结果表明:研究区主力油层属三角洲前缘沉积环境,河口坝为优势沉积微相,其次为水下分流河道及席状砂,远砂坝较少;自左至右主要发育了4个不同的河口坝朵叶体,朵叶体长、宽大于1000 m,单一河口坝通过侧向及垂向叠置形成河口坝复合体,单一河口坝厚度3.8~5.1 m,长、宽度为600~1400 m,倾角小于2°,单一增生体厚度约1.9 m,横向延伸范围3~4个井距,倾角约2.7°;据研究区三角洲前缘砂体分布、几何形态、定量规模及组合样式,归纳得到研究区建设性三角洲前缘砂体的沉积模式。研究成果为河口坝砂岩油气藏后续井位部署及高效开发提供了重要的理论依据。Delta front estuarine bar sand body is one of the most important oil and gas reservoirs in China,and its internal structure controls the distribution and movement of fluid,so it is of great significance to study estuarine bar sand body configuration for efficient development of oil and gas fields.Based on the data of drilling,logging,core analysis and dynamic production,the sedimentary characteristics and reservoir structure of the main oil layer in LU9 well area of Luliang oilfield are studied,the genetic types of the reservoir are defined,the sand body configuration interface is divided,the characteristics of the sand body configuration unit are quantitatively described,and the sedimentation model of hekou bar is summarized.The results show that the main oil layer in the study area belongs to the delta front sedimentary environment,and the estuarine bar is the dominant sedimentary microfacies,followed by the underwater distributary channel and sheet sand,and the far sand bar is less.From left to right,four different estuarine bar lobes are mainly developed,with lobes longer and wider than 1000 m.A single estuarine bar forms an estuarine bar complex through lateral and vertical superposition.The thickness of a single estuarine bar is between 3.8 m and 5.1 m,the length and width are between 600 m and 1400 m,and the inclination is less than 2°.Lateral extension range of 3~4 well spacing,inclination of about 2.7°;According to the distribution,geometry,quantitative scale and combination pattern of the delta front sand body in the study area,the sedimentary model of the constructive delta front sand body in the study area is summarized.The above research results and understanding provide an important theoretical basis for the subsequent well location deployment and efficient development of Hekou bar sandstone reservoir.

关 键 词：三角洲前缘 河口坝 陆梁油田LU9井区 砂体构型 

分 类 号：TE34[石油与天然气工程—油气田开发工程] P343.5[天文地球—水文科学]