热化学流体对致密储层破裂压力的影响

doi:10.3969/j.issn.1006-6535.2025.04.010

特种油气藏 ›› 2025, Vol. 32 ›› Issue (4): 87-93.DOI: 10.3969/j.issn.1006-6535.2025.04.010

热化学流体对致密储层破裂压力的影响

赖枫鹏^1,2, 张浩楠^1,2, 曹龙涛^1,2, 刘开元^1,2, 赵千慧¹, 苗丽丽¹

1.中国地质大学(北京),北京 100083;
2.非常规天然气能源地质评价与开发工程北京市重点实验室,北京 100083

收稿日期:2024-09-23 修回日期:2025-05-15 出版日期:2025-08-25 发布日期:2025-09-03
作者简介:赖枫鹏(1981—),男,教授,博士生导师,《特种油气藏》青年编委,2004年毕业于中国地质大学(北京)石油工程专业,2009年毕业于该校油气田开发工程专业,获博士学位,现主要从事油气田开发理论与方法研究和教学工作。
基金资助:
国家自然科学基金面上项目“页岩油藏CO₂复合压裂渗吸-渗流机理及排采制度优化研究”(52174037);国家自然科学基金联合基金重点项目“海上高温高压低渗透储层渗流流固耦合机理及表征方法研究”(U22B2073)

Effect of thermochemical fluids on fracturing pressure in tight reservoirs

LAI Fengpeng^1,2, ZHANG Haonan^1,2, CAO Longtao^1,2, LIU Kaiyuan^1,2, ZHAO Qianhui¹, MIAO Lili¹

1. China University of Geosciences, Beijing, Beijing 100083, China;
2. Beijing Key Laboratory of Geological Evaluation and Development Engineering for Unconventional Natural Gas Energy, Beijing 100083, China

Received:2024-09-23 Revised:2025-05-15 Online:2025-08-25 Published:2025-09-03

摘要/Abstract

摘要： 针对非常规油气高效开发领域中,在降低破裂压力以提升压裂效率方面所面临的问题,运用机理分析、数值模拟、综合对比等方法,对优选出的氯化铵与亚硝酸钠(NH₄Cl-NaNO₂)反应放热体系展开研究,明确该放热体系在致密砂岩岩心中产生的温度与压力变化规律及其对岩石力学参数的影响,并对比了该体系和常规水力压裂对破裂压力及裂缝起缝的影响。结果表明:NH₄Cl-NaNO₂放热体系在岩心中最高可产生133 ℃的高温和11 MPa的高压,模拟结果与室内实验相符,该体系能有效增加致密砂岩杨氏模量并降低泊松比,其岩石破裂压力与常规水力压裂相比降低23.76%。该研究对推动非常规油气高效开发,提升热化学流体压裂技术应用水平具有重要意义。

关键词: 热化学流体, 致密储层, 破裂压力, 岩石力学参数, 数值模拟

Abstract: Aiming at the challenges in reducing fracturing pressure to enhance fracturing efficiency in the field of efficient unconventional hydrocarbon development,this study employs mechanism analysis,numerical simulation,and comprehensive comparison to investigate the selected exothermic reaction system of ammonium chloride and sodium nitrite (NH₄Cl-NaNO₂). It clarifies the temperature and pressure variation patterns generated by this exothermic system in tight sandstone cores and its impact on rock mechanical parameters,and compares this system with conventional hydraulic fracturing regarding fracturing pressure and fracture initiation. The results indicate that the NH₄Cl-NaNO₂ exothermic system can generate a maximum temperature of 133 ℃ and a high pressure of 11 MPa in the core.Simulation results align with laboratory experiments,showing that this system can effectively increase the Young′s modulus and reduces the Poisson′s ratio of tight sandstone.Compared with conventional hydraulic fracturing, the rock fracturing pressure is reduced by 23.76%.This research is significant for promoting the efficient development of unconventional hydrocarbons and advancing the application level of thermochemical fluid fracturing technology.

Key words: thermochemical fluid, tight reservoir, fracturing pressure, rock mechanical parameters, numerical simulation

中图分类号:

TE348

赖枫鹏, 张浩楠, 曹龙涛, 刘开元, 赵千慧, 苗丽丽. 热化学流体对致密储层破裂压力的影响[J]. 特种油气藏, 2025, 32(4): 87-93.

LAI Fengpeng, ZHANG Haonan, CAO Longtao, LIU Kaiyuan, ZHAO Qianhui, MIAO Lili. Effect of thermochemical fluids on fracturing pressure in tight reservoirs[J]. Special Oil & Gas Reservoirs, 2025, 32(4): 87-93.

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热化学流体对致密储层破裂压力的影响

Effect of thermochemical fluids on fracturing pressure in tight reservoirs

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