摘要
流体是沉积盆地的重要组成部分,流体的形成及运动规律与油气的生成、运聚及油气藏的形成、保存和破坏有着十分密切的联系。以大港探区歧口凹陷古近系流体动力研究为例,通过大量实测数据,分别探讨了流体动力特征、成因及演化过程,流体动力与油气成藏的关系。研究表明,歧口凹陷古近系异常高压在深层普遍发育,欠压实作用、黏土矿物脱水、烃类生成及水热增压是导致该地区异常压力发育的因素。异常高压环境下,深部源岩最后一期成藏期要晚于上部。通过开展歧口凹陷古近系流体动力的研究,明确了压力过渡带是油气勘探的重点,拓展了油气勘探范围,对加强中深层勘探,寻找油气富集区具有重要意义。
As an important part of sedimentary basins,the formation and the law of movement of fluid are closely related to the generation,migration and accumulation of hydrocarbon,and the formation,preservation and destruction of hydrocarbon reservoirs.Taking the Paleogene hydrodynamic research in Qikou Sag of Dagang exploration area as an example,through a large amount of measured data,the relationships between hydrodynamic characteristics,genesis and evolution process,and hydrodynamic and hydrocarbon accumulation are discussed separately.It is showed that the Paleogene abnormally high pressure in Qikou Sag generally develops in deep layers and that undercompaction,clay mineral dehydration,hydrocarbon generation,and hydrothermal pressurization are the factors leading to the abnormal pressure in the area.Under the abnormally high pressure,the last stage of accumulation of deep source rocks is later than that of the upper source rocks.Through the study of Paleogene hydrodynamic in Qikou Sag,it is clear that the pressure transition zone is the focus of hydrocarbon exploration,and the scope of hydrocarbon exploration has been expanded,which is of great significance for strengthening mid-deep formation exploration and finding hydrocarbon enrichment areas.
作者
王娜
吕芳芳
孙超囡
郭志桥
钟玮
董雄英
李昊东
王冠
WANG Na;LYU Fangfang;SUN Chaonan;GUO Zhiqiao;ZHONG Wei;DONG Xiongying;LI Haodong;WANG Guan(Research Institute of Exploration and Development of PetroChina Dagang Oilfield Company, Tianjin 300280,China;Resource Evaluation Office of PetroChina Dagang Oilfield Company, Tianjin 300280,China;No.3 Oil Production Plant of PetroChina Dagang Oilfield Company, Tianjin 300280,China)
出处
《录井工程》
2020年第S01期79-85,共7页
Mud Logging Engineering
关键词
歧口凹陷
流体压力
流体动力演化
油气成藏
Qikou Sag
fluid pressure
hydrodynamic evolution
hydrocarbon accumulation
