理论与试验研究

基于矿物成分的川南页岩断层摩擦与套管变形分析

  • 黄浩勇 ,
  • 钟利庆 ,
  • 曾波 ,
  • 徐尔斯 ,
  • 张丰收
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  • 1.中国石油西南油气田公司页岩气研究院,成都 610051;
    2.同济大学 土木工程学院,上海 200092
黄浩勇(1987—),男,安徽巢湖人,博士,高级工程师。主要从事页岩气储层地质力学及地质工程一体化的技术研究。E-mail:huang_hy@petrochina.com.cn
徐尔斯(1994—),女,四川自贡人,硕士,工程师。主要从事页岩气储层地质力学的研究。E-mail:xuersi@petrochina.com.cn

收稿日期: 2025-08-05

  网络出版日期: 2026-06-23

基金资助

国家自然科学基金重点国际(地区)合作研究项目(42320104003);中石油股份公司科技专项(2023ZZ21)

Fault Friction and Casing Deformation Analysis of Shale in Southern Sichuan Based on Mineral Composition

  • Huang Haoyong ,
  • Zhong Liqing ,
  • Zeng Bo ,
  • Xu Ersi ,
  • Zhang Fengshou
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  • 1. Shale Gas Research Institute, PetroChina Southwest Oil & Gas Field Company, Chengdu 610051, P. R. China;
    2. College of Civil Engineering, Tongji University, Shanghai 200092, P. R. China

Received date: 2025-08-05

  Online published: 2026-06-23

摘要

随着我国四川南部页岩气资源的勘探开发,与裂缝/断层剪切滑移相关的套管变形问题频发,严重限制了深层页岩气建设生产,因此,深地高温高压环境下页岩断层泥的摩擦系数研究有重要意义。选用了3口井(A、B、C井)的不同深度的龙马溪组原位页岩样品制备断层泥并开展摩擦剪切试验,其黏土矿物含量在10%~45%之间。高温高压三轴剪切摩擦试验结果表明,深层页岩的摩擦系数位于0.52~0.70之间,并随着黏土矿物含量增加而线性降低。根据龙马溪页岩的矿物成分预测了龙马溪页岩的摩擦系数分布规律,发现随着单井相对深度变深,摩擦系数也逐渐增加。最后根据剪切试验的应力降推算了龙马溪页岩裂缝/断层的滑移量,并与实际套管变形量进行了验证,并给出了裂缝/断层滑移与套管变形的计算方法。

本文引用格式

黄浩勇 , 钟利庆 , 曾波 , 徐尔斯 , 张丰收 . 基于矿物成分的川南页岩断层摩擦与套管变形分析[J]. 地下空间与工程学报, 2026 , 22(3) : 920 -927 . DOI: 10.20174/j.JUSE.2026.03.17

Abstract

With the exploration and development of shale gas resources in southern Sichuan, casing deformation related to fracture and fault shear slip occurs frequently, severely restricting the construction and production of deep shale gas. Therefore, it is significant to determine the friction coefficient of shale gouge under the high-temperature and high-pressure conditions of deep geologic environments from the perspective of fracture/fault friction. In-situ shale samples from three wells (A, B, and C) at different depths of the Longmaxi Formation were used to prepare fault gouges for friction shear tests. The clay mineral content of the samples ranged from 10% to 45%. The results of high-temperature, high-pressure triaxial shear friction tests show that the friction coefficient of the deep shale is between 0.52 and 0.70, and it decreases linearly as the clay mineral content increases. Based on the mineral composition of the Longmaxi shale, the distribution of the friction coefficient was predicted, revealing that the friction coefficient increases with relative depth within a single well. Finally, the slip amount of fractures/faults in the Longmaxi shale was calculated from the stress drop observed in the shear tests. This calculated slip corresponds well with actual casing deformation measurements. These results further illustrate the relationship between fracture/fault slip and casing deformation and provide a corresponding calculation method.

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