【作者】 蒲秀刚； 吴永平； 周建生； 杨池银； 廖前进； 周立宏； 肖敦清； 查明； 柳飒；

【Author】 PU Xiu-gang;WU Yong-ping;ZHOU Jian-sheng;YANG Chi-yin;LIAO Qian-jin;ZHOU Li-hong;XIAO Dun-qing;ZHA Ming;LIU Sa;Working Station for Postdoctoral Scientific Research,Dagang Oilfield,Company;Working Station for Postdoctoral Scientific Reseach,China of University Petroleum;Dagang Oilfield Company;

【机构】 大港油田分公司博士后工作站； 中国石油大学博士后流动站； 大港油田分公司；

【摘要】 目的通过揭示歧口凹陷古近系沙一下亚段沉积相与形成岩性地层圈闭之间的关系,指出了该区岩性地层圈闭的勘探方向。方法通过对物源与沉积相的研究,构造背景与沉积体系的匹配分析。结果歧口凹陷古近系沙一下亚段主要碎屑物源为北部燕山物源,发育的与油气储集层直接相关的沉积相带主要为浊积相、滩坝以及扇三角洲前缘亚相等,认识到储集层与古斜坡"反向匹配",形成上倾尖灭与构造-岩性地层复合两大类别的油气藏;区内板桥一北大港构造围斜及东部倾没区多个砂组尖灭线下倾部位,以及歧口西斜坡较高部位的(半)封闭湖湾区与沉积频繁相变区为沙一下亚段的有利勘探区。结论成功的勘探策略是:在"大岩性地层油气藏"勘探思路的指导下,把构造带当岩性变化带来研究,在复式油气藏勘探方法之基础上应及时转入以岩性地层油气藏勘探与精细勘探相结合的方法。更多还原

【Abstract】 Aim The relationship and forming mechanism between sedimentary facies and stratigraphic hydrocarbon reservoirs of Paleogene lower Sha 1 sub-member in Qikou depression of Dagang Oilfield have been opened out in this paper.Methods On the basis of study on elastics origin and sedimentary facies,By means of stacked maps bet ween san dstone dis tribution and palaeo structure background.Results Displayed that the primary elastics origin of Paleogene lower Sha 1 sub-member is from the northern old Yanshan Mountains in Qikou depression of Dagang Oilfield,Huanghua Sag of Bohai bay basin.Its sedimentary facies related petroleum reservoir bed are mainly turbidite deposit in semi-deep to deep lacustrine facies,sabulous and limy beach-dam microfacies in shore lacustrine facies to shallow lacustrine facies,and fanlike delta leading edge subfacies etc.Discovered that these oil & gas reservoirs are stacked by contraries on the top of palaeohigh and palaeoslope,so up dip pinch out and structuralstratigraphic multiple hydrocarbon traps can be shaped.Those nonstructural traps rely on matching between palaeostructure background and sedimentary system.According to palaeostructure cosmetics of Qikou Depression of Dagang Oilfield and distributing characteristic of sedimentary system,those important domains for petroleum exploration of Paleogene lower Sha 1 member as follows:①Banqiao-North Dagang area enclosed slope of palaeohigh,pitching end,and reversal clastic source area of break in slope;②frequent facies change areas;③break in gende slope of palaeohigh;④close arm of lake;⑤break in abrupt slope,and low-lying offload areas in depress.In conclusion,successful exploration experience for this area as follows.Conclusion With the guidance of "macroscopical lithologic-stratigraphic hydrocarbon reservoirs",sedimentary system researching with palaeostructure background superposition,treating structural zone as lithologic change zone,exploring stratigraphic hydrocarbon reservoirs with subtle techniques and procedures.更多还原