浅水三角洲相多期窄河道砂体结构研究--以渤海海域渤中25-1南油田为例.pdfVIP

中 国 石 油 勘 探 第21卷　第6期 CHINA PETROLEUM EXPLORATION 2016年11月 DOI: 10.3969/j.issn.1672-7703.2016.06.006 浅水三角洲相多期窄河道砂体结构研究 ——以渤海海域渤中25-1南油田为例 李 超 韩雪芳 胡 勇 周军良 闫 涛 （中海石油（中国）有限公司天津分公司渤海石油研究院） 摘 要：多期窄河道砂体结构研究一直以来是渤海油田开发中急需解决的难题之一。以渤中 25-1 南油田为例， 在砂体构型研究理论的指导下，利用现有钻井、测井、地震及野外露头等资料，明确了浅水三角洲砂体的地质模式， 建立了精细地层格架。通过利用钻井剖面上间断的分流河道间砂体、分流河道砂体顶面高程差异、分流河道砂体沉积 规模差异等3种单井对比模式，结合波幅变化、出现复波等地震响应特征，井震结合分析单期河道砂体的储层结构， 划分出单期河道砂体。研究表明，单期窄河道砂体厚度与砂体宽度呈对数相关，平均宽厚比为 35。单期河道砂体宽 度为 200～400m，延伸范围可至整个工区。研究成果有效指导了油田优化注水、产液结构调整及井网部署，为油田 开发打下了坚实的地质基础。 关键词：窄河道；多期河道；单砂体；储层结构；渤中凹陷 中图分类号：TE112.2　　　　　文献标识码：A Architecture of multiphase narrow-channel sand bodies of shallow water deltaic facies: a case study on BZ25-1S oilfield Li Chao, Han Xuefang, Hu Yong, Zhou Junliang, Yan Tao (Tianjin Bohai Oilfield Institute, CNOOC Ltd.) Abstract: Architecture of multiphase narrow-channel sand bodies has always been one of the subjects to be urgently defined in development of the Bohai oilfield. Taking the BZ25-1S oilfield as an example, guided by the theory of sand body architecture, available data (e.g. drilling, well logging, seismic and outcrop) were used to ascertain the geologic model of shallow water deltaic sand bodies, and the fine stratigraphic framework was established. By applying three types of single well correlation models (i.e. discontinuous distributary interchannel sandbody, elevation difference of the distributary channel sandbody tops, and difference in scale of distributary channel sandbody deposits) on drilling profiles, together with some seismic response features (e.g. wave amplitude variation and complex wave occurrence), well data and seism