Palaeo-Fluid Evidence for the Multi-Stage Hydrocarbon Charges in Kela-2 Gas Field, Kuqa Foreland Basin, Tarim Basin
详细信息
- 责任者：Lu Xuesong (State Key Laboratory of Enhanced Oil Recovery ; Beijing 100083 ; China) ; Liu Keyu
- 刊名：Petroleum Exploration and Development
- 出版年：2012
- 卷期：39(5)
- 关键词：油气充注 ; oil and gas charging ; 流体包裹体 ; fluid inclusions ; 塔里木盆地 ; Tarim Basin
- 页码：p.537-544
- 图表：illus., 33 refs.
- 分类号：1003
- issnNo：ISSN1000-0747
- isbnNo：CN11-2360/TE
摘要
The multi-stage hydrocarbon charge process of Kela-2 gas field in the Kuqa foreland basin was studied from the perspective of palaeo-fluid evidence by the analyses of fluid inclusions,fluorescence spectroscopy,FE-SEM(field emission scanning electron microscopy) observation,core micro-CT scanning,and hydrocarbon geochemistry.The result shows that the Kela-2 gas field has experienced three periods of hydrocarbon charge process.The widely distributed residual dry bitumen,the occurrence of gas-liquid two-phase hydrocarbon inclusions,the residual oils observed in the nanopores,the higher QGF and QGF-E index,and the higher S1,S2 values of rock pyrolysis detected in both current gas zone and water zone,are the evidence of early oil charges.The residual dry bitumen,the occurrence of gas-oil-solid (bitumen) three-phase hydrocarbon inclusions,the loss of light n-alkanes and the relatively high content of aromatic hydrocarbons in the condense oil,and the abnormally high content of diamondoid hydrocarbons,are the strong evidence of gas flushing and deasphalting.