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天然气地球科学

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准噶尔盆地腹部石南地区头屯河组岩性地层油气藏成藏特征及成藏模式

刘文锋，孙德强，杨朝栋，王峰，赵凡，彭云，卫延昭，刘海涛，贾智彬，张涵奇   

  1. 1.中国石油新疆油田公司采油一厂，新疆 克拉玛依 834000；
    2.中国科学院科技政策与管理科学研究所能源与环境政策研究中心,北京100190；
    3.中国石油新疆油田公司勘探开发研究院，新疆 克拉玛依 834000；
    4.中国石油勘探开发研究院西北分院，甘肃 兰州 730000；
    5.中国石油勘探开发研究院，北京 100083； 6.中国地质大学，北京 100083
  • 收稿日期:2015-01-14 修回日期:2015-10-11 出版日期:2015-12-10 发布日期:2015-12-10
  • 作者简介:刘文锋(1975-)，男，河南沈丘人，高级工程师，主要从事石油地质、油气勘探、油气藏评价等研究. E-mail:liuwenfeng@petrochina.com.cn.

Stratigraphic Reservoir Formation Patterns and the Favorable Zones of Stratigraphic/Lithological Reservoirs in Central Junggar Basin

LIU Wen-feng，SUN De-qiang，YANG Chao-dong，WANG Feng，ZHAO Fan，PENG Yun，WEI Yan-zhao，LIU Hai-tao，JIA Zhi-bin，ZHANG Han-qi   

  1. 1.The First Oil Production Plant of Xinjiang Oilfield Company,CNPC,Karamay 834000,China;
    2.Center for Energy and Environment Policy Research,Institute of Policy and Management,Chinese Academy of Sciences,Beijing 100190,China;
    3.Reasearch Institute of Exploration and Development of Xinjiang Oilfield Company,CNPC,Karamay 834000,China;
    4.Northwest Branch of Research Institute of Petroleum Exploration and Development,PetroChina,Lanzhou 730000,China;
    5.Research Institute of Petroleum Exploration and Development,PetroChina,Beijing 100083,China;
    6.China University of Geosciences,Beijing 100083,China
  • Received:2015-01-14 Revised:2015-10-11 Online:2015-12-10 Published:2015-12-10

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摘要：

准噶尔盆地腹部石南地区是中国陆相盆地岩性地层油气藏勘探的重点地区，该区油气藏的油源主要在二叠系，侏罗系主要表现为一套缓坡浅水背景下的三角洲沉积体系，新近纪构造运动对盆地构造的掀斜作用，致使岩性地层圈闭发生改造，早期油气藏发生调整。在这种源外缓坡背景下，岩性地层圈闭的形成条件、沟通油源的输导体系复杂，岩性地层油气藏的形成主控因素和成藏模式不清，再加上该区地震资料品质差、地震分辨率低，这些因素造成该区岩性地层勘探的复杂性。针对研究区存在的上述难点，对研究区的构造特征和沉积背景进行分析。在此基础上，对研究区典型岩性油气藏进行解剖，建立了断裂—沉积体系侧缘—近等深侧向运聚成藏模式，即油气沿断裂进入储集砂体后，垂直构造等高线向构造高部位运移，当遇到与构造斜交的沉积体系侧缘时，油气运移方向发生调整，沿沉积体系侧缘近等深侧向运移，边运聚边成藏模式。

关键词: 准噶尔盆地, 岩性油气藏, 成藏特征, 成藏模式

Abstract:

Shinan area of Central Junggar Basin is the important exploration area of stratigraphic/lithological reservoirs in China.The hydrocarbon of reservoirs in Jurassic & Cretaceous,where delta under slow and shallow-water covered slope developed,has been sourced mainly from the Permain source rocks.The effect of the movement in Late Eocene has made on the Junggar's structure,which was tilted with the result that the stratigraphic/lithological traps have been changed and the early reservoirs have been adjusted.A number of facts have led to the complexity of lithostratigraphic exploration such as the complex transmition of communicating oil source,the less understanding of the main controlling factors on stratigraphic/lithological reservoir formation and its model,the formation condition of stratigraphic/lithological trap and the low quality and resolution of seismic data.The aim of this study is to build the equal time strata frame of Central Junggar Basin,to analyze the structural characteristic and sediment background in the frame on the basis of generalizing the above problems,and then to analyze the typical reservoirs.The hydrocarbon formation model,called as “large faults-the sides of the sediment system-the migration and gathering” type,is built,in which the hydrocarbon moved along nearly equal depth in side direction.That is to say,the hydrocarbon migrated firstly into the reservoir rocks along faults,then into the structural high in the direction vertical to the structural contour.When the hydrocarbon met with the lateral deposition system's slanting intersected with the structure high's side,the direction changes and it would migrate along the lateral part of sediment system in equal depth,leading to the oil and gas' formation of reservoir followed by migration,and indicates the tilting zone of delta front flank-the favorable development area of stratigraphic/lithological reservoirs.According to the formation model,the favorable exploration zone was concluded.

Key words: Junggar Basin, Stratigraphic/lithological reservoir, Reservoir characteristics, Pool-forming model

中图分类号: 

  • TE122.3

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