天然气地球科学

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古地貌对台内滩储层分布及气藏特征的控制作用——以阿姆河盆地台内滩气田为例

田雨,张兴阳,朱国维,张良杰,吴蕾,郭同翠,张宏伟,尉晓玮   

  1. (1.中国矿业大学(北京)地球科学与测绘工程学院,北京 100083;2.中国石油勘探开发研究院,北京 100083;3.中国石油(土库曼斯坦)阿姆河天然气公司,土库曼斯坦 阿什哈巴德 744036)
  • 收稿日期:2015-08-28 修回日期:2015-12-16 出版日期:2016-02-10 发布日期:2016-02-10
  • 作者简介:田雨(1985),男,吉林辽源人,博士研究生,主要从事沉积、层序与储层研究. Email:jilintianyu06@163.com.
  • 基金资助:

    国家科技重大专项“中亚地区含气盆地成藏规律与勘探技术”(编号:2011ZX05029003);中国石油天然气集团公司科学研究与技术开发项目“阿姆河右岸盐下天然气分布规律与区带评价”(编号:2013D0904)联合资助.

Controlling effects of paleogeomorphology on intraplatform shoal reservoirs distribution and gas reservoirs characteristics:  Taking intraplatform shoal gasfields of the Amu Darya Basin as examples

Tian Yu,Zhang Xingyang,Zhu Guowei,Zhang Liangjie,Wu Lei,Guo Tongcui,Zhang Hongwei,Yu Xiaowei   

  1. (1.College of Geoscience and Surveying Engineering,China University of Mining and Technology,Beijing 100083,China;
    2.Research Institute of Petroleum Exploration and Development,CNPC,Beijing 100083,China;
    3.Amu Darya Gas Company,CNPC (Turkmenistan),Ashkhabad 744036,Turkmenistan)
  • Received:2015-08-28 Revised:2015-12-16 Online:2016-02-10 Published:2016-02-10

摘要:

近年来,在特提斯构造域油气富集带中的四川盆地、塔里木盆地及阿姆河盆地的台内滩油气田勘探取得了重要进展,展示了良好的勘探前景。以阿姆河盆地阿姆河右岸地区中上侏罗统盐下碳酸盐岩台内滩气田为例,通过地震层拉平技术、残余地层厚度法和补偿厚度印模法等对古地貌特征进行了研究及恢复,并重点分析了沉积古地貌对台内滩储集体分布及气藏特征的控制作用。结果表明:研究区发育2个大的基底古隆起,隐伏基底隆起形成的台内沉积古地貌差异对台内滩储层的发育具有明显的控制作用,在基底古隆起发育的古地貌高部位台内滩单层厚度大,垂向上多期叠置,横向连片,储层物性条件好,形成大规模的叠合台内滩储集体;在古地貌低洼部位台内滩单层厚度薄,总厚度小,储层物性条件相对较差,形成的台内滩储层规模有限。同时,隐伏隆起形成的台内沉积古地貌差异对台内滩气藏气水系统、产能特征及气田规模也有重要的影响,沉积古地貌高部位台内滩储层垂向连通性较好,内部隔夹层相对不发育,气水系统相对简单,单井产量高;沉积古地貌低洼部位台内滩储层纵向连通性差,内部发育多套隔夹层,气水系统复杂,单井产量较低。继承性隆起上的地貌高地易形成大型叠合台内滩气田。

关键词: 阿姆河盆地, 古地貌, 台内滩, 储层分布, 气藏特征, 控制作用

Abstract:

In recent years,major progress has been made in intraplatform shoals exploration of Sichuan Basin,Tarim Basin and Amu Darya Basin in Tethyan tectonic domain and shows a good exploration prospect.Based on the case study of subsalt intraplatform shoal gas fields of the MiddleUpper Jurassic CallovianOxfordian in the Right Bank Area of Amu Darya Basin,the characteristics of paleogeomorphology are studied and reconstructed through the methods of layer flattening,residual thickness and compensation thickness,especially the controlling effects of sedimentary paleogeomorphology on intraplatform shoal reservoirs and gas reservoirs characteristics are emphatically analyzed.It illustrated that two largescale basement paleo uplifts developed in the study area,and the development of intraplatform shoal reservoirs is obviously controlled by the sedimentary paleogeomorphic differences formed by the hidden basement paleo uplift,while the monolayer thickness of intraplatform shoal is large.Multistage superposed vertically and continuous distributed laterally,and the physical properties of intraplatform shoals reservoirs are better in the high land of basement paleo uplift,where can form largescale superposed intraplatform shoal reservoirs.In contrast,both the monolayer and total thickness are small,and the physical properties of the intraplatform shoal reservoirs are relatively poor in the depressed areas.The scale of intraplatform shoal reservoirs is limited.Meanwhile,paleogeomorpic differences have important influences on gaswater system,productivity and scale of intraplatform shoal gas fields.The vertical connectivity of intraplatform shoal reservoirs is good and the interlayers do not develop in the areas with high sedimentary geomorphology background.The gaswater system is relatively simple and single borehole production is high,while the connectivity of reservoirs is poor and the development degree of interlayers is good in the depressed areas,with complex gaswater systems and low single well production.The high lands of large inherited paleo uplift tend to form largescale superposed intraplatform shoal gas fields.

Key words: Amu Darya Basin, Paleogeomorphology, Intraplatform shoal, Reservoirs distribution, Gas reservoir characteristics, Controlling effect

中图分类号: 

  • TE122.3

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