陆相湖盆洼陷带浊积砂体岩性油藏地震描述技术

Seismic Description Technologies for Turbidity Sandstone Reservoir in Depression Area of Continental Lacustrine Basin

胜利石油管理局地球物理勘探开发公司,东营257100

Geophysical Exploration and development Corporation, Shengli Petroleum Administration, Dongying 257100

陆相湖盆洼陷带因其特殊的地貌、地形特征,极易发育浊积砂体岩性油藏。渤海湾盆地南部的济阳坳陷内各主要沉积洼陷下第三系沙河街组三段浊积砂体发育,砂体类型有近岸浊积扇、远岸浊积扇和滑塌浊积砂体等。文章主要论述了浊积砂体类型与沉积特征、浊积砂体分布规律、浊积砂体油藏类型,利用物源分析、地震相模式识别、多井约束地震反演及浊积砂体形态描述等技术,较系统地研究了浊积砂体岩性油藏地震描述技术,并总结了浊积砂体岩性油藏的勘探思路和步骤。通过在牛庄、渤南、东营及临南等地区推广应用,取得了显著的效果。

Turbidity sandstone reservoir tends to grow up in depression area of continental lacustrine basin due to its special physiographic and topographic features. At Jiyang depression in southern basin of Bohai Bay, turbidity sand bodies flourished in Segment 3 of Lower Tertiary Shahejie formation, the types of sand body are offshore turbidity fan, outer turbidity fan, and fluxoturbidite, etc. This paper discussed the types of turbidity sand body, their features, distributions, and reservoir types, systematically reviewed seismic description technologies including provenance analysis, pattern recognition for seismic facies, mutliwell constrained seismic inversion, and morphologic description of turbidity sand body, etc, and summarized the exploration strategy and steps for turbidity sandstone reservoir. Remarkable effects have been achieved by applying these technologies in areas such as Niuzhuang, Bonan, Dongying, and Linnan.