›› 2013, Vol. 34 ›› Issue (4): 1-1.

• 论文 •    

松辽盆地长岭断陷乾北次洼深层天然气成因判别

王伟明1a,2,卢双舫1a,张淑霞1b,吴 慧2,王贵磊2,文思亮3   

  1. (1. 中国石油大学 a. 非常规油气与新能源研究院;b. 化学工程学院,山东 青岛 266580;2. 东北石油大学 地球科学学院,黑龙江 大庆 163318;3. 中国石油大学 地球科学学院,北京 102249)
  • 出版日期:2019-01-01 发布日期:1905-07-12

The Origin of Deep Natural Gas of Qianbei SubSag of Changling Fault Depression in Songliao Basin

WANG Weiming1a,2, LU Shuangfang1a, ZHANG Shuxia1b, WU Hui2, WANG Guilei2, WEN Siliang3   

  1. (1.China University of Petroleum, a.Research Institute of Unconventional OilGas and New Energy, b.College of Chemical Engineering,Qingdao, Shandong 266580, China; 2.College of Earth Science, Northeast Petroleum University, Daqing, Heilongjiang 163318, China;3. College of Earth Science, China University of Petroleum, Beijing 102249, China)
  • Online:2019-01-01 Published:1905-07-12

摘要: 乾北次洼是松辽盆地南部长岭断陷中最大的一个洼陷,但天然气勘探程度低。据天然气组分、同位素及轻烃分析等资料,结合烃源岩特征,对该洼陷深层天然气成因进行了分析。该洼陷深层烃源岩有机质丰度高、以腐殖型为主,营城组发育Ⅱ1和Ⅱ2型较好的烃源岩,处于过成熟阶段;天然气组分甲烷占绝对优势,乙烷同位素值偏轻,甲烷和乙烷具有明显的碳同位素倒转现象,甲烷来源于偏腐殖型母质,乙烷来源于偏腐泥型母质。

Abstract: Qianbei sub?sag is the biggest one in Changling fault depression in southern Songliao basin, with low degree of natural gas exploration. This paper analyses the origin of deep gas in this sub?sag using natural gas component, isotope and lighter hydrocarbon data, combined with the characteristic of hydrocarbon source rocks. The result shows that the deep source rocks are dominated by humus kerogen, characterized by high abundance of organic matter, and good source rocks of Type?Ⅱ1 and Type?Ⅱ2 are distributed in Yingcheng formation, with post?maturity evolution degree; methane accounts for absolute advantage of natural gas component, nohydrocarbon gas contentis low; ethane isotope value is somewhat lighter, methane and ethane have obvious carbon isotope reversal phenomenon, corresponding to different types of kerogens: the methane is partial humic type and the ethane partial sapropelic type

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