新疆石油地质 ›› 2003, Vol. 24 ›› Issue (5): 374-378.

• 油气勘探 • 上一篇    下一篇

柴达木盆地生物气成藏条件

党玉琪1, 侯泽生2, 徐子远2, 张道伟2, 赵明君2   

  1. 1.石油大学,北京 昌平 102200;
    2.中国石油 青海油田分公司 甘肃 敦煌 736200
  • 收稿日期:2003-04-10 发布日期:2021-01-14
  • 作者简介:党玉琪(1958-), 男,陕西蒲城人,高级工程师,在读博士研究生,石油地质。联系电话:0937-8934592

The Conditions for Biogas Accumulation in Qaidam Basin

DANG Yu-qi1, HOU Ze-sheng2, XU Zi-yuan2, ZHANG Dao-wei2, ZHAO Ming-jun2   

  1. 1. University of Petroleum, Changping, Beijing 102200, China;
    2. Qinghai Oilfield Company, PetroChina, Dunhuang, Gansu 736200, China
  • Received:2003-04-10 Published:2021-01-14

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。

关键词: 柴达木盆地, 生物气, 气藏形成, 条件

Abstract: 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 production modeling experiment, logging and lab analysis, this paper describes the biogas accumulating conditions in this basin, including 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.

Key words: Qaidam basin, biogas, gas reservoir, condition

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