盐家地区砂砾岩体发育特征及油气富集主控因素  

Development characteristics of glutenite body and main controlling factors of oil and gas enrichment in Yanjia area

作　　者：王东晔 WANG Dongye(Exploration&Development Research Institute of Shengli Oilfield Company,SINOPEC,Dongying,Shandong,257015,China)

机构地区：[1]中国石化胜利油田分公司勘探开发研究院,山东东营257015

出　　处：《石油地质与工程》2020年第6期28-32,共5页Petroleum Geology and Engineering

基　　金：国家科技重大专项“渤海湾盆地精细勘探关键技术”(2016ZX05006)。

摘　　要：针对盐家地区砂砾岩分布规律和控藏因素认识不清等问题,充分利用多种资料,地质综合分析和数理统计评价相结合,系统地开展砂砾岩体发育特征及油气富集控制因素的研究。结果表明,盐家地区古地貌和边界断裂类型控制砂砾岩体的类型及分布,沙四段和沙三下亚段主要发育近岸水下扇,表现为“沟扇对应、多期叠置”的沉积特点。优质烃源岩是砂砾岩体成藏的物质基础,有效储层控制砂砾岩体成藏部位,扇根封堵决定油藏充满程度。高部位砂砾岩体主要发育受构造控制形成的构造油藏、构造-岩性油藏和地层不整合油藏;低部位主要发育鼻状构造背景上的岩性油藏,具有“扇根封堵、扇中富集、含油连片”的成藏特点,实现了扇根封堵临界条件的量化评价,可为盐家地区砂砾岩体的勘探部署提供资料。In view of the unclear understanding of the distribution law and reservoir controlling factors of glutenite in Yanjia area,the development characteristics of glutenite body and main controlling factors of oil and gas accumulation are systematically studied by using various data,combining geological comprehensive analysis and mathematical statistics evaluation.The results show that the types and distribution of glutenite are controlled by paleogeomorphology and boundary fault types in Yanjia area.The nearshore subaqueous fan is mainly developed in the fourth member of Shahejie formation and the lower third member of Shahejie formation,showing the sedimentary characteristics of"gully-fan correspondence and multi-stage superimposition".High quality source rock is the material basis of glutenite reservoir formation.Effective reservoir controls the location of glutenite reservoir,and fan root plugging determines the reservoir filling degree.The glutenite body in high position mainly develops structural oil reservoirs,structural-lithologic oil reservoirs and stratigraphic unconformity oil reservoirs formed by tectonic action.In low position,lithologic reservoirs with nose-like structural background are mainly developed,with the characteristics of"sealing at the root of fan,enrichment in the fan and continuous oil-bearing".Therefore,the quantitative evaluation of the critical conditions of fan root plugging is realized,which can provide data for exploration and deployment of glutenite body in Yanjia area.

关 键 词：盐家地区 砂砾岩体 多期叠置 富集规律 扇根封堵 

分 类 号：TE112.33[石油与天然气工程—油气勘探]