东北石油大学学报2024，Vol.48Issue(1)：74-85,12.DOI:10.3969/j.issn.2095-4107.2024.01.007
伏龙泉断陷沙河子组—登娄库组天然气地球化学特征与成藏过程
Geochemical characteristics of natural gas and accumulation process of the Shahezi Formation and Den-glouku Formation in the Fulongquan Fault Depression
摘要
Abstract
Taking the Shahezi Formation and Denglouku Formation gas reservoirs in the Fulongquan Fault Depression as an example,based on the experimental analysis of source rocks,natural gas geo-chemistry,reservoir fluid inclusions and isotopes of carbonate cement,it carried out studies on gas source correlation,accumulation history and reservoir formation process.The results show that the gas in the Denglouku Formation is coal-derived and the source rock is primarily the local Shahezi Formation.The accumulation of oil and gas in the Shahezi Formation began at the end of Quantou Formation and continued to be charged until the end of Nenjiang Formation.The natural gas accumulation in Den-glouku Formation is mainly in late Mingshui Formation.Shahezi Formation is conducive to the forma-tion of primary gas reservoir.Natural gas of Denglouku Formation is reformed from deep and high ma-turity natural gas.The key to controlling the gas accumulation in Denglouku Formation is the positive paleostructure or primary paleotrap developed in the source rock layers,the effective allocation of the"through-source"fault and the cap layer of Quantou Formation.Both sides of the uplift belt in the mid-dle of the fault depression are close to the hydrocarbon generating center,and the"through-source"fault develops,which is conducive to the formation of gas reservoirs in Denglouku Formation.The extruding stress at the end of the fault in the hydrocarbon generating depression area is strong,and the tight gas in the source is well preserved,which is the favorable direction for the next exploration.关键词
烃源岩/气源对比/成藏期次/天然气成藏/伏龙泉断陷/地球化学特征Key words
source rock/gas source correlation/accumulation period/natural gas accumulation/Fu-longquan Fault Depression/geochemical characteristics分类
能源科技引用本文复制引用
魏靖依..伏龙泉断陷沙河子组—登娄库组天然气地球化学特征与成藏过程[J].东北石油大学学报,2024,48(1):74-85,12.基金项目
中国石油天然气集团公司"十四五"前瞻性基础性重大科技项目(2021DJ0205) （2021DJ0205）
