Confidence evaluation of fractures seismic detection in shale gas formations on WY23 Pad in Weirong

LI Jingchang; LU Ting; NIE Haikuan; FENG Dongjun; DU Wei; SUN Chuanxiang; LI Wangpeng

doi:10.13809/j.cnki.cn32-1825/te.2023.05.009

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Confidence evaluation of fractures seismic detection in shale gas formations on WY23 Pad in Weirong

更新时间：2025-12-05

- Confidence evaluation of fractures seismic detection in shale gas formations on WY23 Pad in Weirong
- Petroleum Reservoir Evaluation and Development Vol. 13, Issue 5, Pages: 614-626(2023)
- 作者机构：
  
  1. 中国石化页岩油气勘探开发重点实验室，北京 100083中国石化石油勘探开发研究院,北京,100083
  2. 中国石化石油勘探开发研究院,北京,100083
- 作者简介：
- 基金信息：
- DOI：10.13809/j.cnki.cn32-1825/te.2023.05.009
  CLC： TE37
- Published：2023
- 稿件说明：
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LI Jingchang, LU Ting, NIE Haikuan, et al. Confidence evaluation of fractures seismic detection in shale gas formations on WY23 Pad in Weirong[J]. Petroleum Reservoir Evaluation and Development, 2023, 13(5): 614-626.
DOI：

LI Jingchang, LU Ting, NIE Haikuan, et al. Confidence evaluation of fractures seismic detection in shale gas formations on WY23 Pad in Weirong[J]. Petroleum Reservoir Evaluation and Development, 2023, 13(5): 614-626. DOI： 10.13809/j.cnki.cn32-1825/te.2023.05.009.

摘要

由于对裂缝发育程度预估不足，严重地影响了威荣页岩气田的勘探开发效果，加强裂缝预测方面的研究已刻不容缓。应用叠后地震倾角方位属性对WY23平台开展了裂缝检测，并对检测效果从地质、地震、测井以及工程4个方面进行了可信度评价。结果表明，裂缝具有层控特点，大致以③小层顶面为界，裂缝可划分出上下2套裂缝系统，这2套裂缝系统在剖面上均相向而倾，且走向集中在310°，倾角均小于20°，是北东—南西向挤压作用的结果。应用该方法进行裂缝检测，可信度较高，可在WY23以外的开发平台推广和应用。

Abstract

Due to the inadequacy in the pre-assessment of natural fracture growth in shale

the exploration and development effect of Weirong shale gas field is seriously affected. It is imperative to enhance research on fracture prediction. In this paper

we applied the post-stack seismic dip-azimuth attribute to detect fractures in the WY23 Pad

and evaluated the reliability of the detection results from four aspects: geology

seismic

logging and engineering. The method employed for fracture detection revealed that fractures exhibit layer-controlled characteristics. They can be divided into two sets of upper and lower fracture systems roughly bounded by the top surface of the ③ thin layer. These fracture systems dip toward each other in the profile

with a predominant strike direction of 310° and dip angles of less than 20°. This configuration is the result of NE-SW compression. The application of this method for fracture detection has a high degree of confidence and can be promoted and applied in other development pad than WY23.

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