岩性油气藏 ›› 2021, Vol. 33 ›› Issue (1): 71–80.doi: 10.12108/yxyqc.20210107

• 油气地质 • 上一篇    下一篇

准噶尔盆地玛中地区二叠系—三叠系叠合成藏特征及主控因素

陈静, 陈军, 李卉, 努尔艾力·扎曼   

  1. 中国石油新疆油田分公司勘探开发研究院, 新疆 克拉玛依 834000
  • 收稿日期:2020-08-04 修回日期:2020-11-04 出版日期:2021-02-01 发布日期:2021-01-25
  • 作者简介:陈静(1981-),女,硕士,工程师,主要从事油气地质勘探方面的研究工作。地址:(834000)新疆克拉玛依市克拉玛依区准噶尔路29号新疆油田勘探开发研究院。Email:chjing66@petrochina.com.cn。
  • 基金资助:
    中国石油天然气集团公司新疆重大科技专项“准噶尔盆地油藏富集规律及勘探技术研究与应用”（编号：2016E-0401）资助

Characteristics and main controlling factors of Permian-Triassic superimposed reservoirs in central Mahu Sag,Junggar Basin

CHEN Jing, CHEN Jun, LI Hui, NUERAILI Zhaman   

  1. Research Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Karamay 834000, Xinjiang, China
  • Received:2020-08-04 Revised:2020-11-04 Online:2021-02-01 Published:2021-01-25

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摘要： 玛湖凹陷是准噶尔盆地目前已发现油气富集程度最高的生烃凹陷，其中二叠系—三叠系具有较大的勘探潜力。为了研究其叠合成藏特征及主控因素，开展了录井、测井、岩心分析化验及试油资料分析，并进行了三维地震资料解释。结果表明：①玛中地区发育二叠系下乌尔禾组和三叠系百口泉组2套优质储层，扇三角洲前缘亚相是研究区油气富集的有利相带；在湖侵背景下，砂体多期叠置连片，具备形成大面积岩性圈闭群的地质条件。②研究区储盖组合配置较好，砂体纵向上相互叠置，侧面的断裂和上覆的三角洲平原亚相泥岩可为油气成藏提供遮挡。③研究区发育高角度走滑断层及一系列伴生构造，深层断裂沟通油源，浅层断裂控制圈闭和油藏，与不整合面一起共同构成了高效的输导体系，是多层系叠合成藏的重要控制因素。该研究成果对玛中地区中深层油气勘探具有借鉴意义。

关键词: 扇三角洲前缘, 砂砾岩油藏, 下乌尔禾组, 百口泉组, 玛湖凹陷, 准噶尔盆地

Abstract: Mahu Sag is a hydrocarbon generation deperession with the highest hydrocarbon accumulation degree in Junggar Basin,and Permian-Triassic has great exploration potential. In order to study the characteristics and main controlling factors of its superimposed reservoirs,a large number of analyses of mud-logging, well logging,core analysis and oil test data were carried out,and 3D seismic data was interpreted. The results show that:(1)There are two sets of high-quality reservoirs developed in central Mahu Sag,including Permian lower Urho Formation and Triassic Baikouquan Formation. The front edge of fan delta is a favorable belt for oil and gas enrichment. Under the background of lacustrine transgression,sand bodies are superimposed and connected in many stages,which has geological conditions for forming large lithologic trap group.(2)The reservoir-cap assemblage is well configured, sand bodies are vertically overlapped,and lateral faults and overlying delta plain subfacies mudstone can provide shelter for hydrocarbon accumulation.(3)High-angle strike-slip faults and a series of associated structures are developed in the study area. Deep faults communicate with oil sources,and shallow faults control traps and reservoirs,together with unconformities, they form a highly efficient transport system,which is an important controlling factor for multi-layer superimposed reservoirs. The research results have reference significance for mid-deep oil and gas exploration in central Mahu Sag.

Key words: fan delta front, glutenite reservoir, lower Urho Formation, Baikouquan Formation, Mahu Sag, Junggar Basin

中图分类号: 

  • TE122.2
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