岩性油气藏 ›› 2022, Vol. 34 ›› Issue (1): 139–147.doi: 10.12108/yxyqc.20220114

• 勘探技术 • 上一篇    下一篇

浅水三角洲薄砂层地震沉积表征技术——以准噶尔盆地芳草湖地区清水河组为例

常少英1,2, 刘玲利1, 崔钰瑶2, 王锋3, 宋明星3, 穆晓亮2   

  1. 1. 中国石油杭州地质研究院, 杭州 310023;
    2. 中国石油大学(北京), 北京 102249;
    3. 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:2021-06-30 修回日期:2021-08-18 发布日期:2022-01-21
  • 通讯作者: 崔钰瑶（1997—），女，中国石油大学（北京）在读硕士研究生，研究方向为石油天然气地质综合。Email：1064870340@qq.com。 E-mail:1064870340@qq.com
  • 作者简介:常少英(1983-),男,在读博士研究生,高级工程师,主要从事地质-地球物理综合研究工作。地址:(310023)浙江省杭州市西溪路920号中国石油杭州地质研究院。Email:changsy_hz@petrochina.com.cn
  • 基金资助:
    国家科技重大专项“大型油气田及煤层气开发”下属课题“寒武系—中新元古界碳酸盐岩规模储层形成与分布研究”（编号：2016ZX05004-002）和国家科技重大专项“南海中建海域深水油气地质条件及目标评价”（编号：2017ZX05026-006）联合资助

Seismic sedimentary characterization of thin sand layers of shallow water deltas: A case study of Qingshuihe Formation in Fangcaohu area, Junggar Basin

CHANG Shaoying1,2, LIU Lingli1, CUI Yuyao2, WANG Feng3, SONG Mingxing3, MU Xiaoliang2   

  1. 1. PetroChina Hangzhou Research Institute of Geology, Hangzhou 310023, China;
    2. China University of Petroleum(Beijing), Beijing 102249, China;
    3. Research Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Karamay 834000, Xinjiang, China
  • Received:2021-06-30 Revised:2021-08-18 Published:2022-01-21

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摘要： 浅水三角洲薄砂层是重要的岩性油气藏勘探新领域，但砂体薄、横向变化快，沉积结构特征难以识别，制约了该类沉积体的勘探开发。以准噶尔盆地莫索湾凸起芳草湖地区为例，通过地质-地球物理综合分析，深化地震沉积学分析技术。采用“准层序组内高低频旋回波形分离技术”、“去除地层切片干涉效应技术”和“地质体与沉积背景属性融合技术”等3项技术，开展了浅水三角洲地震沉积学特征研究，并总结了浅水曲流河三角洲沉积模式。研究表明：①白垩系清水河组一段发育多个四级层序，反映湖平面周期性变化；②下切水道、扇状砂体广泛发育；③白垩系清水河一段浅水曲流河三角洲沉积体系发育3套储盖组合，是潜力较大的勘探层系。浅水三角洲薄砂层地震沉积特征识别技术的应用，助推了风险井位上钻，并取得较好的勘探效果，为该区增储上产提供了技术保障，同时对其他类似地区的薄砂层识别具有较好的借鉴意义。

关键词: 地震沉积学, 下切水道, 波形分离, 去干涉效应, 属性融合, 清水河组, 莫索湾凸起, 准噶尔盆地

Abstract: Shallow water delta thin sand layer is an important new field of lithologic reservoir exploration. It is difficult to identify the sedimentary structure of shallow water delta due to thin sand bodies and rapid lateral variation,which restricts the exploration and development of this kind of sedimentary body. Taking Fangcaohu area of Mosuowan uplift in Junggar Basin as an example,the seismic sedimentological analysis technology was deepened through comprehensive geological and geophysical analysis. The seismic sedimentological characteristics of shallow water deltas were studied,and the sedimentary models of shallow water meandering river deltas were summarized by using three technologies, such as high and low frequency cycle waveform separation in parasequence set, remov-ing interference effect of stratigraphic slice and attribute fusion of geological body and sedimentary background. The results show that:(1) Multiple fourth-order sequences are developed in the first member of Cretaceous Qingshuihe Formation in Fangcaohu area,reflecting the periodic change of lake level.(2) Incised channels and fanshaped sand bodies are widely developed.(3) There are three sets of reservoir-cap assemblages developed in the shallow meandering river delta sedimentary system of the first member of Cretaceous Qingshuihe Formation, which are exploration strata with great potential in this area. The application of seismic sedimentary characteristics identification technology of thin sand layers in shallow water deltas has promoted the drilling of risk wells and achieved good exploration results. This technology provides technical support for increasing reserves and production in this area, and it can provide reference for the identification of thin sand layers in other similar areas.

Key words: seismic sedimentology, undercut channel, waveform separation, de-interference effect, attribute fusion, Qingshuihe Formation, Mosuowan uplift, Junggar Basin

中图分类号: 

  • P631
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