• 责任者：Zhou Wen (State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Chen Wenling
• 刊名：Journal of Chengdu University of Technology
• 出版年：2013
• 卷期：40(6)
• 关键词：页岩气 ; shale gas ; 油气藏 ; oil and gas reservoir ; 鄂尔多斯盆地 ; Ordos Basin
• 页码：p.640-647
• 图表：6 illus., 4 tables, 21 refs.
• 分类号：1003
• issnNo：ISSN1671-9727
• isbnNo：CN51-1634/N

     This paper discusses the type of the fluid oil/gas phase in Member Chang 7 continental shale of Triassic Yanchang Formation in Ordos Basin.Based on the high pressure PVT （pressure-volumetemperature） test data,the oil/gas phase diagram of Yanchang Formation oil reservoir is mapped.The phase of Member Chang 6 ＆ Member Chang 8 oil reservoirs in the west of the basin is considered as a single oil phase and that in the east of the basin as oil and gas phases.The oil and gas coexist in Member Chang 7 shale.According to the relationship between producing gas-oil ratio and depth of the typical Member Chang 6 ＆ Member Chang 8 oil reservoirs and the thermal evolution of organic matter （Ro） of Member Chang 7 shale,the linear relationship between the depth and Ro of Member Chang 7 oil/gas phase shale is established.Based on the depth and Ro distribution isograms of Member Chang 7 shale,the Zibei,Ansai,Xiasiwan,Fuxian areas in the east of the basin are determined as shale oil and gas phases zone.The shale gas is composed of adsorbed gas,free gas and crude oil dissolved gas.The oil/gas phase in the west of the basin is a single oil phase zone,mainly occurring shale oil and the gas is crude oil dissolved gas.This determined method can be applied to phase evaluation of the continental rich in organic matter shale formations being at the organic matter maturation stage （Ro =o.5％～1.3％）.