中深层水热型地热资源集群式开发井位部署参数研究与应用——以HTC地热田为例

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

Abstract

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.

Key words: medium-deep hydrothermal geothermal resources, cluster development, numerical simulation, optimization of development modes, optimization of well pattern, optimization of well spacing

CLC Number:

TE09

Changcheng GAI,Zhongxin ZHAO,Lu REN, 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.

Figures/Tables 14

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试验编号	时长/ min	流量/ （m³/d）	含水层导水系数/（m²/d）	渗透系数/（m/d）	弹性释水系数
第一组	870	2 256	98.2	1.07	9.00×10^-5
第二组	1 140	2 352	135.0	1.47	8.12×10^-5
平均				1.27	8.56×10^-5

试验编号	持续时间/h	设计回灌量/ （m³/h）	最小回灌量/（m³/h）	最大回灌量/（m³/h）	动水位/m
第一组	19.5	50	44.95	56.00	50.6
第二组	57.5	33/44/56	32.87	56.37	53.3
第三组	96.0	50/60/70/80	31.09	80.06	55.8

参数类型	参数名称	参数取值
地层参数	储层埋深/m	2 400
	储层厚度/m	200
	孔隙度/%	31
	渗透率/（10^-3 μm³）	497
	地层压力/MPa	24
流体参数	水热容/[J/（m³·℃）]	4.20×10⁶
流体参数	水相热传导率/[J/（m·d·℃）]	5.34×10⁴
岩石参数	岩石热容[J/（m³·℃）]	2.35×10⁶
岩石参数	岩石热传导率/[J/（m·d·℃）]	6.60×10⁵
边界条件	热储温度/℃	78
	采水量/（m³/h）	100
	回灌量/（m³/h）	75
	回灌温度/℃	30
	采灌时间/a	30
模型参数	单网格水平长度/m	10
	单网格纵向长度/m	10
	单网格厚度/m	50
	网格数量/个	130×86×4

井网	井数/ 口	井距/ m	动用资源量占比/%	流场波及面积占比/%	热突破时间/月
直列交错井网	1采2灌	450	75.21	40.9	417
直列排状井网	1采2灌	450	65.70	32.3	355
直角三角形井网	1采2灌	450	63.10	31.3	293

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

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