柴达木盆地三湖北斜坡岩性气藏勘探与发现
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摘要
柴达木盆地三湖地区第四系是在新近纪末期新构造运动作用下,盆地沉积中心由西向东整体迁移的产物,在第四系中发现了世界上最大的生物气田(背斜气田)。近年来,在三湖地区第四系发现了岩性气藏,开辟了三湖天然气勘探的新领域。通过构造背景、气源条件和生储盖组合等条件评价岩性气藏形成的基本地质背景;在简单回顾勘探历程的基础上,分析了已发现岩性气藏的地质、地震特征;针对岩性气藏的特征,提出了精细地震资料处理、精细等时格架地层对比和精细含气检测的研究方法,为下一步在该区开展岩性气藏的勘探研究工作提供了技术支持。
Under the effect of neotectonic movement at last stage of Neogene,the whole sedimentary center of Qaidam Basin migrated from west to east,and so the Quaternary system was generated in Sanhu Area.The world's largest biogas field was discovered in the system.In the past few years,lithologic gas reservoirs have been discovered in the system,which pioneered a new field for natural gas exploration in Sanhu Area.By evaluating the basic geological background for the generation of lithologic gas reservoirs in terms of tectonic settings,gas source conditions,and source-reservoir-caprock assemblage,on the basis of simply reviewing the exploration course,this paper analyses the geological and seismic features of the lithologic reservoirs.In view of the features of lithologic reservoirs,this paper puts forward the research method for precise seismic data processing,precise isochronic stratigrahic framework correlation,and precise gas bearing test,providing technical support for further exploration study in lithologic reservoirs of the Area.
Under the effect of neotectonic movement at last stage of Neogene,the whole sedimentary center of Qaidam Basin migrated from west to east,and so the Quaternary system was generated in Sanhu Area.The world's largest biogas field was discovered in the system.In the past few years,lithologic gas reservoirs have been discovered in the system,which pioneered a new field for natural gas exploration in Sanhu Area.By evaluating the basic geological background for the generation of lithologic gas reservoirs in terms of tectonic settings,gas source conditions,and source-reservoir-caprock assemblage,on the basis of simply reviewing the exploration course,this paper analyses the geological and seismic features of the lithologic reservoirs.In view of the features of lithologic reservoirs,this paper puts forward the research method for precise seismic data processing,precise isochronic stratigrahic framework correlation,and precise gas bearing test,providing technical support for further exploration study in lithologic reservoirs of the Area.
引文
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[2]管志强,徐子远,周瑞年,等.柴达木盆地第四系生物气的成藏条件及控制因素[J].天然气工业,2001,21(6):1～5.
[3]邓津辉,史基安,王琪,等.柴达木盆地中东部地区储层特征与天然气成藏条件[J].吉林大学学报(地球科学版),2002,32(4):340～344.
[4]康南昌,焦贵浩,蔡加铭,等.柴达木盆地三湖拗陷石油地质特征及下步勘探与研究方向[J].石油地球物理勘探,2009,44(4):508～514.
[5]管志强,夏斌,吕宝凤,等.柴达木盆地三湖地区生物气成藏基本要素及其配置性[J].天然气地球科学,2008,19(2):165～170.
[6]焦贵浩,张林,李剑,等.柴达木盆地三湖地区生物气资源潜力及勘探方向[J].中国石油勘探,2009,14(2):1～5.
[7]田继先,孙平,张林,等.利用地震属性预测柴达木盆地三湖地区第四系生物气藏[J].天然气地球科学,2010,21(2):305～309.
[8]徐伯勋,白旭滨,等.地震勘探信息技术——提取、分析、预测[M].北京:地质出版社,2001:51～55.
[9]刘企英.利用地震信息进行油气预测[M].北京:石油工业出版社,1994:306～310.
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