Page 88 - 《应用声学》2022年第4期

第 41 卷 第 4 期 Vol. 41, No. 4
2022 年 7 月 Journal of Applied Acoustics July, 2022

⋄ 研究报告 ⋄

弹性波速径向变化在非常规储层

可压性评价中的应用 ∗

钱玉萍 1† 王文文 2 张聪慧 1 祁 晓 1

(1 中海油田服务股份有限公司油田技术事业部 廊坊 065201)
(2 中联煤层气有限责任公司 北京 100016)
摘要：非常规储层的开发均需要进行压裂，所以对非常规储层可压性的评价就变得很重要。岩石的脆性是影
响储层可压性的重要因素，是优选压裂层位的重要指标。该文在单极子波形正演模拟及波速径向变化计算的
基础上，针对非常规储层，应用弹性波速径向变化来评价储层脆性，并分析这种方法在非常规储层可压性评价
中的应用效果。通过实例分析可看出，对于相邻两套致密砂岩储层，脆性好的井段压裂后产能也较高，证实了
此方法对可压性的分析结果；对于煤储层，煤层段弹性波速降低明显，反映煤层可压性较好，这与煤层段的压
裂效果也是相符的。所以，对于非常规储层，基于弹性波速径向变化评价脆性的方法能够很好地反映非常规储
层可压性的强弱。
关键词：脆性；可压性；弹性波速径向变化；非常规储层
中图法分类号: TE19 文献标识码: A 文章编号: 1000-310X(2022)04-0586-07
DOI: 10.11684/j.issn.1000-310X.2022.04.010

Application of radial acoustic velocity variation in the fracability evaluation
of unconventional reservoirs

QIAN Yuping 1 WANG Wenwen 2 ZHANG Conghui 1 QI Xiao 1

(1 Oilfield Technology Department, China Oilfield Services Limited, Langfang 065201, China)
(2 China United Coalbed Methane Co., Ltd., Beijing 100016, China)

Abstract: The development of unconventional reservoirs requires fracturing, so it is very important to evaluate
the fracability of unconventional reservoirs. The brittleness of rock is an important factor affecting the fraca-
bility of reservoir and an important index for optimizing fracturing interval. For unconventional reservoirs, this
paper applies the radial acoustic velocity variation to evaluate the brittleness of unconventional reservoir, and
analyzes the application effect of this method in the fracability evaluation of unconventional reservoir. It can
be seen through the examples, for the two sets of tight sandstone reservoir, the brittleness is better, and the
productivity after fracturing is higher, and this confirms the analysis results of this method on the fracability;
for coal reservoirs, the radial acoustic velocity in coal reservoir decreases obviously, reflecting the brittleness of
coal reservoir, which is also consistent with the fracturing effect of coal reservoir. Therefore, for unconventional
reservoirs, the method of brittleness evaluation based on the radial acoustic velocity variation can well reflect
the fracability of unconventional reservoirs.
Keywords: Brittleness; Fracability; Radial acoustic velocity variation; Unconventional reservoir

2021-06-17 收稿; 2021-11-30 定稿
中国海洋石油集团有限公司 “煤层气/页岩气/致密砂岩气三气共采先导性试验研究” 资助项目
∗
作者简介: 钱玉萍 (1989– ), 女, 山东临沂人, 硕士, 工程师, 研究方向: 测井解释。
† 通信作者 E-mail: qianyp2@cosl.com.cn