渤海湾盆地黄河口凹陷中央构造脊沙河街组砂体展布规律与储层发育特征
杨海风 , 钱赓 , 徐春强 , 高雁飞 , 康荣
地球科学 ›› 2023, Vol. 48 ›› Issue (08) : 3068 -3080.
渤海湾盆地黄河口凹陷中央构造脊沙河街组砂体展布规律与储层发育特征
Sandstone Distribution and Reservoir Characteristics of Shahejie Formation in Huangheko Sag,Bohai Bay Basin
中央构造脊是在黄河口凹陷内受走滑挤压作用形成的水下同沉积洼内隆起,同时也是黄河口凹陷重要的油气聚集带;但脊内沙河街组储层非均质性强,其砂体展布与储层发育规律尚不明确,制约了深部勘探部署.通过三维地震、钻测井、岩矿数据分析恢复了沙河街组沉积期中央构造脊古地貌特征、落实构造脊东西砂体展布与南北物源供给界限,并将构造脊细分为东、西、南3个主要单元对储层发育的差异性进行详细研究. 通过微观储层分析刻画结合构造-沉积特征总结不同单元储层发育特征,表明东脊沙三段沉积期地势较低,为主物源通道,南北搬运距离远,砂体成熟度高;后期隆升诱导裂缝发育,渗透率升高,优质储层发育;西脊沉积期地势较高,为主物源侧翼,薄层杂砂岩,泥质含量高,局部钙质发育,储层欠发育;南脊持续隆升,作为南北物源交互区,脊内微隆起周期出露水面沉积淋滤碳酸盐岩造成临近砂体碳酸盐胶结强,物性相对较差.
沙河街组 / 沉积体系 / 储层特征 / 差异性 / 中央构造脊 / 黄河口凹陷 / 石油地质学
Shahejie Formation / depositional systerm / reservoir characteristic / difference / central structural ridge / Huangheko Sag / petroleum geology
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”十三五”国家科技重大专项(2016ZX05024-003)
中海石油(中国)有限公司综合科研项目(YXKY-2017-TJ-01)
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