成都理工大学学报（自然科学版）2017，Vol.44Issue(5)：565-578,14.DOI:10.3969/j.issn.1671-9727.2017.05.07
渤海湾盆地歧口凹陷古近系沉积体系重建与储集层评价
Reconstruction of Paleogene sedimentary system and reservoir evaluation in Qikou Sag, Bohai Bay Basin, China
摘要
Abstract
The spatial distribution pattern of sedimentary system and development characteristics of favorable reservoir of Paleogene in Qikou Sag of Bohai Bay Basin are discussed on the basis of continental sequence stratigraphy analysis and traditional sedimentology,so as to provide support for the second exploration and deployment of hydrocarbon in highly prospected area.It shows that the Paleogene slopes in Qikou Sag lay the foundation for the formation of lithological hydrocarbon reservoirs.In addition to the four provenances of uplift outside the basin,the bulges,such as Kongdian,Gangxi,in the basin are also important provenances of clastic sedimentary system.The slope area is rich in mud and sand;it has complete sedimentary-facies succession of Paleogene system,including well developed braided river delta,fan delta,offshore fan and lacustrine carbonate rocks in the lake,characteristic of coexistence of primary pores,secondary pores and micro-fractures in the medium-deep reservoir.The early oil and gas charging,secondary dissolution and the effect of the abnormal high pressure play an important role in the formation of high quality reservoirs.It reveals that the lower limit of exploration can reach down 5 km in the slope area.Many types of reservoirs match with Qibei bend slope,Banqiao slope and Chengbei fault slope and form the stratigraphic and lithologic traps,such as stratigraphic overlap traps,unconformity screened traps,upward tilting traps and so on.Exploration indicates that the Qibei slope,Chengbei fault slope have 100 million tons scale reserve and 10 million tons scale reserve area in Banqiao slope.As a faulted lacustrine basin,the slope is a favorable exploration area of stratigraphic and lithologic reservoirs.关键词
歧口凹陷/沉积体系/古近系/断陷湖盆/油气勘探Key words
Qikou Sag/sedimentary system/Paleogene system/faulted lacustrine basin/petroleum exploration分类
能源科技引用本文复制引用
赵贤正,杨飞,蒲秀刚,周立宏,肖敦清,陈长伟,韩文中,张伟,时战楠,林常梅..渤海湾盆地歧口凹陷古近系沉积体系重建与储集层评价[J].成都理工大学学报（自然科学版）,2017,44(5):565-578,14.基金项目
中国石油天然气集团公司重大科技专项(2014E-06). （2014E-06）
