新疆石油天然气 ›› 2024, Vol. 20 ›› Issue (3): 30-36.DOI: 10.12388/j.issn.1673-2677.2024.03.004

• 油气勘探 • 上一篇    下一篇

页岩储层不同尺度断裂识别方法

  

  1. 中国石油大学(北京)克拉玛依校区,新疆克拉玛依 834000
  • 出版日期:2024-09-06 发布日期:2024-09-10
  • 作者简介:李昂(1980-),2006年毕业于中国石油大学(北京)地球探测与信息技术专业,教授级高级工程师,目前从事非常规油气地震解释与“甜点”预测、地震地质工程一体化、油气勘探部署等方面研究。(Tel)18940030590(E-mail)2023592101@cupk.edu.cn
  • 基金资助:

    1、“天池英才”引进计划“基于岩石物理模型的混积型页岩各向异性地质‘甜点’工程‘甜点’评价方法”;

    2、中国石油大学(北京)克拉玛依校区引进人才基金“页岩油勘探中宽方位地震方位各向异性分析与校正方法研究”(XQZX20240029);

    3、“基于地震岩石物理的页岩地层可压性评价研究”(XQZX20240015)。

Faults at Various Scales Identification Techniques in Shale Reservoirs

  1. Karamay Campus,China University of Petroleum (Beijing),Karamay 834000,Xinjiang,China
  • Online:2024-09-06 Published:2024-09-10

摘要:

摘要:松辽盆地齐家凹陷南部青山口组发育页岩储层,页岩油正在成为该地区增储上产的重要接替领域。青山口组沉积时期被多组不同期次断裂切割,断裂识别及裂缝预测难度影响了对该区油藏主控因素的认识。准确识别不同级次断裂的展布特征对研究区页岩油勘探具有重要意义。地震属性分析是断裂识别、储层预测的有效手段之一,不同的地震属性能描述不同的地质特征,单一地震属性难以全面精确识别断裂。综合利用方差体属性、三维构造曲率属性、构造平滑以及三维边缘强化技术、蚂蚁体属性等地震多属性断裂识别技术,提高不同级次断裂的识别精度,形成一套有效的针对不同级次、不同尺度的页岩地层断裂识别技术流程。有效刻画了研究区内断裂展布特征,实现了不同级次断裂平面展布预测,克服了单一地震属性方法在断裂识别及预测中的局限,为油气资源勘探部署提供可靠依据。

关键词:

地震属性, 断裂识别, 多尺度, 页岩储层, 松辽盆地

Abstract:

Qingshankou Formation of the southern Qijia Sag in Songliao Basin develops shale reservoirs,and shale oil is becoming an important replacement field for increasing reserves and production of hydrocarbons in this area. Qingshankou Formation has been cut by different sets of faults during its deposition,and the difficulty in fault identification and fracture prediction has affected the understanding of the main control factors of the reservoir in this area. It is of great significance to accurately identify the distribution characteristics of faults of different levels for shale oil exploration in this area. Seismic attribute analysis is one of the effective means of fault identification and reservoir prediction. Different seismic attributes can describe different geological characteristics,and it is hard to use a single seismic attribute to comprehensively and accurately identify faults. In this paper,the variance cube attribute,3D structural curvature attribute,structural smoothing and 3D edge enhancement technique,ant body attribute as well as other seismic multi-attribute fault identification techniques are comprehensively used to improve the identification accuracy of faults of different levels,and a set of shale formation fault identification technical process is formed which is effective for faults of different levels and scales. The characteristics of fault distribution in the study area are effectively described,and the planar distribution prediction of faults of different levels is realized. This research overcomes the limitations of the single seismic attribute method in fault identification and prediction,and provides a reliable basis for the deployment of oil and gas exploration.

Key words:

seismic attribute, fault identification, multi-scale, shale reservoir, Songliao Basin

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