地学前缘 ›› 2019, Vol. 26 ›› Issue (6): 281-288.DOI: 10.13745/j.esf.sf.2019.9.21

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深层火山碎屑熔岩形成机理及其指相意义研究：以松辽盆地庆深气田为例

牛花朋，王贵文，鲜本忠，付健伟，焦小芹，李洪娟   

  1. 1. 中国石油大学(北京) 油气资源与探测国家重点实验室, 北京 102249
    2. 中国石油大学(北京) 地球科学学院, 北京 102249
    3. 中国石油大学(北京) 地球物理学院, 北京 102249
    4. 大庆油田有限责任公司勘探开发研究院, 黑龙江 大庆 163712
  • 收稿日期:2018-09-20 修回日期:2019-04-20 出版日期:2019-11-30 发布日期:2019-11-30
  • 作者简介:牛花朋(1979—)，女，博士，副教授，硕士生导师，主要从事矿物岩石学与储层地质学研究。E-mail: niuhuapeng@126.com
  • 基金资助:
    国家重点基础研究发展计划“973”项目(2009CB219307)；国家科技重大专项(2017ZX05063002-006)；北京高等学校青年英才计划项目(YETP0669)；中国石油大学(北京)科研基金项目(KYJJ2012-01-22)

The formation mechanism of pyroclastic lava and its significance for the identification of volcanic rock faces: a case study from Qingshen gasfield, Songliao Basin

NIU Huapeng，WANG Guiwen，XIAN Benzhong，FU Jianwei，JIAO Xiaoqin，LI Hongjuan   

  1. 1. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum(Beijing), Beijing 102249, China
    2. College of Geosciences, China University of Petroleum(Beijing), Beijing 102249, China
    3. College of Geophysics, China University of Petroleum(Beijing), Beijing 102249, China
    4. Exploration and Development Research Institute of Daqing Oilfield Ltd, Daqing 163712, China
  • Received:2018-09-20 Revised:2019-04-20 Online:2019-11-30 Published:2019-11-30
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摘要： 基于不同岩性、岩相条件从根本上决定了储集空间的发育程度与规模，所以找火山岩的储层集中表现为火山岩相、亚相的识别。文中以松辽盆地庆深气田为例，重点研究了深层火山碎屑熔岩形成机理及其在火山岩地质相和测井相识别中的意义。研究表明，火山碎屑熔岩类火山岩常见火山碎屑流、泡沫熔岩流、岩流自碎作用、近地表隐爆作用、再熔结(胶结)型5种成因类型，且不同成因火山碎屑熔岩具有明显不同的矿物岩石学特征和测井响应特征。根据其形成机理、矿物岩石学特征和FMI成像特征，认为上述5种成因类型的火山碎屑熔岩分别发育于爆发相热碎屑流亚相、介于爆发相和喷溢相之间的爆溢相、喷溢相、火山通道相隐爆角砾岩亚相、火山通道相火山颈亚相或近火山口相。该研究成果对于促进火山岩相、亚相的准确识别和优质储层的有效预测具有重要的指导意义。

 

关键词: 松辽盆地, 火山碎屑熔岩, 机理, 岩相, 测井相, 火山岩储层

Abstract: Based on reservoir closely related with the different lithology and facies, looking for superior volcanic reservoir focuses on the identification of volcanic rock facies and subfacies. In this paper, on the base of geological data accumulated in the study of volcanic rocks basin, the formation mechanism of pyroclastic lava in Qingshen gasfield of Songliao Basin and its significance for the identification of volcanic rock facies and log facies were discussed. Studies have shown that the pyroclastic lava have generally five genetic types such as the pyroclastic flow, the foam lava flow, the stream broken oneself, the near-surface magma cryptoexplosion, and the remelting type which are unique petrology and log response characteristics. According to the formation mechanism, petrology and FMI characteristics, the above different five genetic types respectively belong to the hot pyroclastic flow subfacies of eruption facies, the erupting-flowing facies between explosive facies and effusive facies, effusive facies, cryptoexplosive breccia subfacies of volcanic vent facies, volcanic neck subfacies of volcanic vent facies or facies around crater. The results of the study contribute to the accurate identification of volcanic rock facies and subfacies, and the effective forecast of the high quality reservoirs.

Key words: Songliao Basin, pyroclastic lava, mechanism, facies, log facies, volcanic reservoir

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