松辽盆地扶新隆起带扶杨油层地层水化学特征及其与油气运聚关系  

Hydrochemical characteristics of formation water and its relationship with hydrocarbon migration and accumulation in Fuyang oil layer in Fuxin Uplift,Songliao Basin

作　　者：梅啸寒 张琴[2,3] 王雅芸 吴欣松[2,3] 刘景彦[1] 赵家宏[5] 王武学[5] Mei Xiaohan;Zhang Qin;Wang Yayun;Wu Xinsong;Liu Jingyan;Zhao Jiahong;Wang Wuxue(School of Energy Resources,China University of Geosciences(Beijing),Beijing 100083,China;State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum(Beijing),Beijing 102249,China;College of Geosciences,China University of Petroleum(Beijing),Beijing 102249,China;No.3 Oil Production Plant,Qinghai Oil Field Branch Company Ltd.,PetroChina,Mangya,Qinghai 816400,China;Research Institute of Exploration and Development of Jilin Oilfield Branch Company Ltd.,PetroChina,Songyuan,Jilin 138000,China)

机构地区：[1]中国地质大学(北京)能源学院,北京100083 [2]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249 [3]中国石油大学(北京)地球科学学院,北京102249 [4]中国石油青海油田分公司采油三厂,青海茫崖816400 [5]中国石油吉林油田分公司勘探开发研究院,吉林松原138000

出　　处：《石油与天然气地质》2020年第2期328-338,358,共12页Oil & Gas Geology

摘　　要：扶新隆起带扶杨油层经历了近60年的勘探开发依然是松辽盆地南部最主要的油气富集区之一。然而,扶新隆起带构造条件复杂,断层密集,油、气、水分布极其复杂,油气运聚过程及油气富集规律尚不明确,极大制约了进一步油气勘探开发效果。在分析扶新隆起带北坡扶杨油层地层水来源以及纵向上和平面上分布规律基础上,解剖重点区典型的油藏剖面,结合地层压力及烃源岩条件,深入探讨扶新隆起带扶杨油层地层水特征,与油气运聚和富集的耦合关系。垂向上,扶新隆起带水化学可划分为大气水下渗淡化带、压实水淡化带、溶蚀浓缩带、粘土矿物脱水淡化带以及越流浓缩带5个区带;平面上,扶新隆起带新北鼻状构造带和新立鼻状构造带为是两大离心流发生集中越流泄水的区域,形成了高矿化度、高钠氯系数区域与油气富集区高度的一致性。源内成藏区、源边成藏区油源条件较好,地层受扰动深度较深,成藏条件良好。而在源外成藏区部烃源岩成熟度低,含油气流体影响深度较浅,油源条件较差。After nearly 60 years of exploration and development,Fuyang oil layer in Fuxin Uplift still remains one of the most important hydrocarbon accumulation zones in Southern Songliao Basin.However,the structural setting of Fuxin Uplift is complex:faults are densely developed,the contacts between oil,gas and water layers are extremely complex,and the process of hydrocarbon migration and accumulation and the hydrocarbon enrichment pattern stay to be identified.These factors greatly restrict further efforts made for hydrocarbon exploration and development.Following the analysis of the origin and the vertical and horizontal distribution patterns of formation water in Fuyang oil layer on the northern slope of Fuxin Uplift,we dissected the typical reservoir profiles in key areas,and made an in-depth discussion on the coupling relations between formation water characteristics and hydrocarbon migration,accumulation and enrichment in Fuyang oil layer in Fuxin Uplift in combination with analysis of formation pressure and source rocks.Vertically,five hydrochemical zones can be identified in Fuxin Uplift:diluted zones from meteoric water percolation,diluted zone from compaction,concentrated zone from dissolution,diluted zone from clay mineral dehydration,as well as concentrated zone from over flow.In the plane,the Xinbei and Xinli nose-like structural zones in the study area are the areas where two major centrifugal flows converge and result in cross-formational flow,leading to the high consistency between zones of high salinity and high sodium chloride coefficient and zones of hydrocarbon enrichment.The oil source conditions are relatively better in the intra-source and near-source hydrocarbon accumulation zones,and the depth of hydrocarbon-bearing fluid disturbance is deeper,favorable for hydrocarbon accumulation.However,the source rocks in out-of-source hydrocarbon accumulation zones are low in maturity,and the depth of hydrocarbon-bearing fluid disturbance is shallow,unfavorable for hydrocarbon accumulation.

关 键 词：地层水化学 油气运移 油气聚集 扶新隆起带 松辽盆地 

分 类 号：TE122.1[石油与天然气工程—油气勘探]