砂岩热储层回灌条件对储层孔渗物性的影响

doi:10.3969/j.issn.1006-6535.2025.05.014

特种油气藏 ›› 2024, Vol. 32 ›› Issue (5): 119-128.DOI: 10.3969/j.issn.1006-6535.2025.05.014

砂岩热储层回灌条件对储层孔渗物性的影响

刘常源^1,2, 赵增新³, 亢品⁴, 胡景宏^1,2, 王腾^1,2, 高志前^1,2, 唐玄^1,2

1.中国地质大学(北京),北京 100083;
2.北京市非常规天然气能源地质评价与开发工程重点实验室,北京 100083;
3.中国石化国际石油勘探开发有限公司,北京 100029;
4.中国石油华北油田分公司,河北辛集 052360

收稿日期:2024-03-09 修回日期:2025-08-01 出版日期:2025-09-25 发布日期:2025-10-30
通讯作者: 胡景宏(1983—),男,教授,博士生导师,2004年毕业于西南石油学院油气储运工程专业,2010年毕业于中国石油大学(北京)油气田开发工程专业,获博士学位,现从事非常规油气藏、地热高效开发理论与方法等方面的教学与研究工作。
作者简介:刘常源(2000—),男,2022年毕业于北京工业大学土木工程专业,现为中国地质大学(北京)石油与天然气工程专业在读博士研究生,从事非常规油气藏、地热高效开发理论与方法方面的研究。
基金资助:
雄安新区科技创新专项“雄安地区地热能开发利用的理论与应用研究”(2022XACX0800)

Influence of reinjection conditions on porosity and permeability of sandstone thermal reservoirs

LIU Changyuan^1,2, ZHAO Zengxin³, KANG Pin⁴, HU Jinghong^1,2, WANG Teng^1,2, GAO Zhiqian^1,2, TANG Xuan^1,2

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;
3. Sinopec International Petroleum Exploration and Production Corporation, Beijing 100029, China;
4. PetroChina North China Oilfield Company, Xinji, Hebei 052360, China

Received:2024-03-09 Revised:2025-08-01 Online:2025-09-25 Published:2025-10-30

摘要/Abstract

摘要： 尾水回灌是保证地热资源开采可持续发展的必要手段,但尾水回灌时,过高的注入压力会对热储层产生破坏,尾水水质也会影响热储层流体流动能力。为保证热储层回灌的安全性与稳定性,以雄安新区馆陶组热储层为例,建立了热储层破裂压力预测模型,计算分析热储层回灌的临界注入压力;利用数值模拟方法,研究回灌水温与注入压力对储层孔隙度与渗透率的影响;最后,建立尾水颗粒沉积数学模型,分析悬浮颗粒物粒径、渗流速度以及颗粒物质量浓度对热储层渗透率的影响。研究表明:在低于热储层破裂压力情况下,回灌尾水的温度和压力不会对热储层孔隙度和渗透率产生明显影响,孔隙度和渗透率的变化幅度均小于2.00%,并且在100 a内不会发生热突破;尾水水质会对热储层渗透率产生较大影响,在尾水回灌过程中,必须注意尾水水质对热储层物性的影响。该研究结果可为热储层尾水回灌施工的安全性和稳定性提供技术支撑。

关键词: 地热, 尾水回灌, 临界注入压力, 颗粒沉积, 热储层

Abstract: Tailwater reinjection is a necessary means to ensure the sustainable development of geothermal resource extraction. However, during tailwater reinjection, excessive injection pressure can damage the thermal reservoir, and tailwater quality may also impair the fluid flow capacity of the thermal reservoir. To ensure the safety and stability of thermal reservoir reinjection, taking the Guantao Formation thermal reservoir in the Xiong′an New Area as an example, a prediction model for the fracture pressure of the thermal reservoir was established to calculate and analyze the critical injection pressure for thermal reservoir reinjection; using numerical simulation methods, the effects of reinjection water temperature and injection pressure on reservoir porosity and permeability were studied; finally, a mathematical model for tailwater particle deposition was established to analyze the effects of suspended particle size, seepage velocity, and particle mass concentration on the permeability of the thermal reservoir. The study shows that under conditions below the fracture pressure of the thermal reservoir, the temperature and pressure of the reinjected tailwater do not have a significant impact on the porosity and permeability of the thermal reservoir. The changes in porosity and permeability are less than 2.00%, and thermal breakthrough will not occur within 100 years; tailwater quality can have a greater impact on the permeability of the thermal reservoir. During the tailwater reinjection process, attention must be paid to the impact of tailwater quality on the physical properties of the thermal reservoir. The research results can provide technical support for the safety and stability of tailwater reinjection operations in thermal reservoirs.

Key words: geothermal, tailwater reinjection, critical injection pressure, particle deposition, thermal reservoir

中图分类号:

TK529

刘常源, 赵增新, 亢品, 胡景宏, 王腾, 高志前, 唐玄. 砂岩热储层回灌条件对储层孔渗物性的影响[J]. 特种油气藏, 2024, 32(5): 119-128.

LIU Changyuan, ZHAO Zengxin, KANG Pin, HU Jinghong, WANG Teng, GAO Zhiqian, TANG Xuan. Influence of reinjection conditions on porosity and permeability of sandstone thermal reservoirs[J]. Special Oil & Gas Reservoirs, 2024, 32(5): 119-128.

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砂岩热储层回灌条件对储层孔渗物性的影响

Influence of reinjection conditions on porosity and permeability of sandstone thermal reservoirs

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