柴达木盆地三湖坳陷浅层生物气成藏模式分析

英文篇名：Analysis of the accumulation patterns of the shallow biogenic gas pools in Sanhu Depression, Caidamu Basin
中文刊名：西安石油大学学报(自然科学版)
作者：梁全胜 ; 刘震 ; 常迈 ; 党玉琪
英文作者：LIANG Quan-sheng ; LIU Zhen ; CHANG Mai ; DANG Yu-qi ( Key laboratory of Education Ministry for Hydrocarbon Accumulation Mechanism ; China University of Petroleum ; Beijing 102249 ; China ; Qinghai Oilfield Company ; Dunhuang 736202 ; Guansu ; China)
中文关键词：柴达木盆地 ; 三湖坳陷 ; 浅层生物气藏 ; 气烟囱 ; 乙烷 ; 碳同位素
英文关键词：Caidamu Basin ; Sanhu Depression ; shallow biogenic gas pools ; gas chimney ; carbon isotope
出版日期：2005-05-25
机构：石油大学教育部石油天然气成藏机理重点实验室,石油大学教育部石油天然气成藏机理重点实验室,石油大学教育部石油天然气成藏机理重点实验室,石油大学教育部石油天然气成藏机理重点实验室北京102249 ,北京102249 ,北京102249 ,北京102249青海油田公司,甘肃敦煌736202
年：2005
期：03
出版单位：西安石油大学学报(自然科学版)

摘要

柴达木盆地三湖地区第四系浅层生物气一直被认为完全是由第四系腐殖型有机质生成的.最新研究结果表明:(1)第四系生物气藏探明储量与源岩条件之间不匹配;(2)高分辨率地震剖面特征表明三湖坳陷气田区域第四系发育了大量的气烟囱;(3)生物气组分特征表明有热成因气混入的可能性;(4)乙烷等重烃气碳同位素特征表明三湖坳陷第四系气藏有腐泥型生物气混入;(5)三湖坳陷上第三系狮子沟组发育偏腐泥型有机质.笔者认为第四系浅层生物气藏的形成机理比较复杂,包括“下生上储”和“自生自储”两种模式,第四系的浅生物气由上第三系狮子沟组生物气与第四系生物气混合而成.
The biogenic gas in Sanhu region has been considered being generated by the Quaternary humic type source rock. But the last research results show that, (1) the proved reserves of Quaternary biogenic gas pools does not match with Quaternary source rock condition; (2) some gas chimneys are found on the high-resolution seismic sections of Sanhu region; (3) the component characteristics of the biogenic gas show that thermo-genic gas is possibly mixed in the Quaternary biogenic gas; (4) the characteristics of the carbon isotope of heavyhydrocarbon gases such as ethane show that sapropelic-type biogenic gas is probabily is mixed in the Quaternary biogenic gas; (5) the sapropelic-type organic matter exists in Neogene Shizigou Formation of Sanhu Depression. Based on the research results above, the authors think that the accumulation mechanism of the Quaternary shallow biogenic gas pools is relatively complicated, there are two accumulation patterns: "down-generation and up-storage" of the biogenic gas of Neogene Shizigou Formation and "self-generation and self-storage" of Quaternary biogenic gas. That is, the shallow biogenic gas in Sanhu area is composed of the biogenic gas of Neogene Shizigou Formation and Quaternary biogenic gas.

引文

[1]GeorgeWShurr,JennieLRidgley.Unconventionalshallowbiogenicgassystems[J].AAPGBulletin,2002,86(11):19391969.
    [2]任光明.我国浅层生物气气藏的压力特征及成因探讨[J].石油勘探与开发,1999,26(3):1821.
    [3]王金鹏,史基安,姜桂凤,等.柴达木盆地中东部地区N23生物气地球化学特征[J].天然气工业,2004,24(1):1316.
    [4]朱筱敏,康安,胡宗全,等.柴达木盆地第四系层序地层特征与油气评价[J].石油勘探与开发,2002,29(1):5660.
    [5]顾树松.柴达木盆地东部第四系气田形成条件及勘探实践[M].北京:石油工业出版社,1993.45.
    [6]MeldahlP,HegglandR,BrilB,etal.Identifyingfault andgaschimneysusingmulti attributesandneuralnetworks[J].TheLeadingEdgeofGeophysics,2001:474482.
    [7]刚文哲,高岗,郝石生,等.论乙烷碳同位素在天然气成因类型研究中的应用[J].石油实验地质,1997,19(2):164167.
    [8]戴金星,李先奇,宋岩,等.中亚煤成气聚集域东部煤成气的地球化学特征[J].石油勘探与开发,1995,22(4):15.
    [9]戴金星,宋岩.煤成气型生物成因气及其成因的探讨[A].戴金星.天然气地质和地球化学论文集(卷一)[C].北京:石油工业出版社,1998.154161.
    [10]张士亚.中国天然气的成因分类[A].石油天然气地质文集(第4集,中国天然气地质研究)[C].北京:地质出版社,1994.2742.
    [11]张厚福,方朝亮,高先志,等.石油地质学[M].北京:石油工业出版社,1999.74.
    [12]惠宽洋.鄂尔多斯盆地煤成气与油型气成因类型鉴别模式研究[J].矿物岩石,2000,20(2):4348.
    [13]张晓宝,胡勇,段毅,等.柴达木盆地第三系生物气的地质地球化学证据[J].石油勘探与开发,2002,29(2):3941.
    [14]徐子远,姜桂凤,韩凤祥.柴达木盆地生物气资源现状与勘探方向[A].柴达木盆地油气勘探论文集[C].北京:石油工业出版社,2004.197203.