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天然气地球科学

• 天然气地质学 • 上一篇    下一篇

鄂尔多斯盆地靖西中部地区天然气富集差异及有利勘探方向预测

朱荣伟1，2，蒋有录2，刘景东2，刘新社3，候云东3，崔小君2   

  1. 1.中国科学院边缘海与大洋地质重点实验室，南海海洋研究所，广东 广州 510301；
    2.中国石油大学（华东）地球科学与技术学院，山东 青岛 266580；
    3.中国石油长庆油田公司勘探开发研究院，陕西 西安 710018
  • 收稿日期:2016-06-07 修回日期:2016-09-26 出版日期:2017-01-10 发布日期:2017-01-10
  • 作者简介:朱荣伟（1988-），男，湖北鄂州人，博士研究生，主要从事海洋地质与油气地质研究. E-mail：zhurongwei1209@126.com.
  • 基金资助:

    国家自然科学基金项目(编号：41476039；41276048；91328205)；中央高校基本科研业务费专项(编号:14CX02116A)联合资助.

Natural gas enrichment difference and prediction of favorableexploration targets in the midland of Jingxi area,Ordos Basin

Zhu Rong-wei1，2，Jiang You-lu2，Liu Jing-dong2，Liu Xin-she3，Hou Yun-dong3，Cui Xiao-jun2   

  1. 1.Key Laboratory of Marginal Sea Geology,South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 510301,China;
    2.School of Geosciences,China University of Petroleum (East China),Qingdao 266580,China;
    3.Exploration & Development of Research Institute,PetroChina Changqing Oilfield Company,Xi’an 710018,China
  • Received:2016-06-07 Revised:2016-09-26 Online:2017-01-10 Published:2017-01-10

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摘要：

随着鄂尔多斯盆地靖边气田扩边勘探的深入，在靖西地区奥陶系中组合白云岩储层中已发现多个含气区，但各含气区天然气的富集程度差异明显，尤其以靖西中部最为明显，有关这种富集差异的原因尚未开展深入研究。为此，借助钻井岩心、测井及储层物性等地质资料，从天然气充注能力、输导通道连通性、储层发育特征等方面对比分析了靖西中部地区苏127、苏203及桃15等3个区块天然气成藏特征的差异，从而探讨了靖西中部地区天然气富集差异原因，并对有利勘探方向进行了预测。结果表明，靖西中部地区苏127区块_苏203区块_桃15区块天然气富集的差异主要由下列因素造成：供烃窗口处的天然气充注能力决定了天然气富集程度；中组合储层输导通道的连通性影响了天然气聚集成藏的位置；储层的物性控制了天然气聚集成藏的规模。综合分析认为，苏127区块北部_苏203区块_桃15区块南部的马五5亚段_马五6亚段为有利勘探区；马五7亚段_马五10亚段勘探潜力相对较差。

关键词: 源储接触关系, 供烃能力, 天然气富集差异, 有利勘探方向, 奥陶系中组合, 靖西中部地区

Abstract:

During the progressive exploration of the Jingbian Gas Field in the Ordos Basin,multiple gas-bearing regions have been discovered in the dolomite reservoirs in the Middle Ordovician assemblages of Ordovician in the Jingxi area,but these gas-bearing regions are significantly different in terms of gas enrichment degrees,especially in the midland of Jingxi area.However,the reasons for it have not been figured out.On the basis of drilling data,logging data,reservoir data and other geological data,we compared the characteristics of natural gas accumulation of three areas in the midland of Jingxi area and analyzed the main factors controlling the gas accumulation.It is shown that the natural gas accumulation of the study area is mainly controlled by the following factors.Firstly,gas charging capacity of hydrocarbon-supplying windows controls natural gas enrichment degree.Secondly,the connectivity of transporting pathway affects the position of natural gas accumulation.And thirdly,the pore ratio and permeability of reservoir control the scale of natural gas accumulation.It is concluded that Ma55 and Ma65 sub-members are favorable exploration areas in the north of Su127 area,Su203 area and the south of Tao15 area,and the exploration potential of Ma75-Ma105 sub-member is relatively poor.

Key words: Source rock-reservoir contact relationship, Gas charging capacity, Gas enrichment difference, Favorable exploration target, Middle Ordovician assemblages, The midland of Jingxi area

中图分类号: 

  • TE121.2

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