Research and application of well location deployment parameters for cluster development of medium-deep hydrothermal geothermal resources: A case study of HTC geothermal field

GAI Changcheng; ZHAO Zhongxin; REN Lu; YAN Yican; HOU Benfeng

doi:10.13809/j.cnki.cn32-1825/te.2024.04.014

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Research and application of well location deployment parameters for cluster development of medium-deep hydrothermal geothermal resources: A case study of HTC geothermal field
Vol. 14, Issue 4, Pages: 638-646(2024)
Published：2024
DOI： 10.13809/j.cnki.cn32-1825/te.2024.04.014
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DOI：

GAI Changcheng, ZHAO Zhongxin, REN Lu, et al. Research and application of well location deployment parameters for cluster development of medium-deep hydrothermal geothermal resources: A case study of HTC geothermal field[J]. Petroleum Reservoir Evaluation and Development, 2024, 14(4): 638-646. DOI： 10.13809/j.cnki.cn32-1825/te.2024.04.014.

摘要

在中国“双碳”战略背景下，清洁能源的高效开发利用逐渐成为各行业关注的焦点，而中深层水热型地热资源是一种储量丰富、运行稳定、绿色环保的清洁能源。近年来，随着地热资源开发利用程度逐渐增加，开发模式逐渐向集群式发展，相比以往的分布式开发模式，集群式开发具有经济、稳定、抗风险能力高、改扩建能力强等优点。但开发模式、采灌井网、采灌井距等关键参数仍在探索阶段，这些参数对集群式开发影响明显，亟须对此开展机理研究、优化关键参数。以HTC地热田作为研究对象，利用数值模拟技术，耦合地下温度场、压力场、水流场建立数学模型，分析不同开发模式、采灌井网、采灌井距条件下地下温度场、压力场、水流场变化规律，确定最优参数，指导矿场生产。实践证实，该方法可有效保障地热开发项目稳定运行，实现地热开发项目经济效益最优化。

Abstract

Under the framework of the national “double carbon” strategy

the efficient development and utilization of clean energy have become a focal point across various industries. Middle and deep hydrothermal geothermal resources

characterized by their abundant reserves and environmentally friendly attributes

represent a significant clean energy source. Recent trends have shown a shift from a distributed development model to a cluster development model for geothermal resources

offering advantages in terms of economy

stability

risk management

and scalability. However

the development mode

well patterns

and well spacing

key parameters in cluster development

are still under investigation due to their significant impact on the process. There is an urgent need to conduct research on these mechanisms and optimize the key parameters. In this study

the HTC geothermal field serves as the subject for our analysis. We employ numerical simulation technology to integrate the underground temperature field

pressure field

and water flow field into a comprehensive mathematical model. This model helps analyze the effects of various development modes and patterns

as well as the spacing of mining and irrigation wells

thereby identifying optimal parameters that can guide field production. Practice has demonstrated that this approach effectively ensures the stable operation of geothermal development projects and enhances their economic benefits.