摘要
柴达木盆地生物气主要产自盆地中东部地区第四系七个泉组和上第三系狮子沟组湖相沉积层。从柴达木盆地中东部地区七个泉组和狮子沟组独特的沉积环境和地质特点出发,运用古生物、细菌调查、生化产气模拟实验、录井及分析化验等大量资料和研究成果,分析和阐述了柴达木盆地生物气成藏条件:适应细菌生存繁衍的空间环境,充足持久的气源条件,最佳的生储盖组合。认为,适时的圈闭条件及良好的保存条件是柴达木盆地生物气成藏的必要条件。
The biogas in Qaidam basin is primarily produced in Qigequan formation of Quaternary in east-central Qaidam basin and lacustrine sediment of Palaeogene Shizigou formation.Based on sedimentary environments and geologic features of the two formations,by means of great amounts of data and studied results from paleontology,bacteria investigation,biochemical gas pro-duction modeling experiment,logging and lab analysis,this paper describes the biogas accumulating conditions in this basin,in-cluding space environment adapted for bacterial growth and multiplying,enough and durative gas supply,the best source-reservoir-caprock assemblage.It is suggested that timely trapping and good preservation conditions are the necessary prerequisites for biogas accumulations in Qaidam basin.
出处
《新疆石油地质》
CAS
CSCD
2003年第5期374-378,共5页
Xinjiang Petroleum Geology
