• 责任者：Chen Qinghua (School of Earth Sciences and Technology ; China University of Petroleum ; Qingdao 266580 ; China) ; Lao Haigang
• 刊名：Natural Gas Industry
• 出版年：2013
• 卷期：33(10)
• 关键词：潜山油气藏 ; buried-hill reservoir ; 冀中坳陷 ; Jizhong Depression
• 页码：p.32-39
• 图表：6 illus., 1 table, 30 refs.
• 分类号：1003
• issnNo：ISSN1000-0976
• isbnNo：CN51-1179/TE

     Exploration in recent years reveals that huge potential exists in the carbonate reservoirs in deepburied hills in the Jizhong Depression, Bohai Bay Basin. This paper systematically summarized the hydrocarbon accumulation patterns in the deepburied hills, the burial depth of which is over 4000 m, in this study area. First, various seismic attribute parameters were integrated with stratigraphic correlation to accurately define the structural shapes and horizons of the deepburied hills. Then, logging, outcrop observation and core data were used to study the conditions favorable for hydrocarbon accumulation such as oil source, reservoir space, cap rocks and carrier beds, and summarized the patterns of hydrocarbon accumulation in the deepburied hills. The following conclusions were obtained. （1） The deepburied hills mostly entered the stable deep burial period since the Oligocene. The palaeoburied hill traps were formed early, thus the source rocks were correspondingly great in burial depth, high in organic abundance, wide in oil/gas window, timeconsuming in hydrocarbon generation and expulsion, and high in thermal maturity, thus providing sufficient oil/gas source for the buried hill pools. （2） The reservoir space of carbonates was dominated by a network system consisting of pores, vugs and fractures, thus its burial depth had little impact on reservoir poroperm characteristics. （3） Two overlying regional seals and 5 local seals within the buried hills provided supreme sealing conditions for the hydrocarbon accumulation and preservation in the buried hills. （4） The nearsource carrier system such as fault and unconformity led to the favorable temporal and spatial assemblage of reservoir, source and cap rocks, resulting in a typical buriedhill reservoir of “new source rock and old reservoir” represented by the wells like Chang6 and Ninggu1.