根据经济分析对优化井距进行定性评估

IF 2.9 2区 地球科学 Q3 ENERGY & FUELS Geothermal Energy Pub Date : 2024-05-21 DOI:10.1186/s40517-024-00295-5
Wenjie Sun, Weizun Zhang, Zhongxin Zhao, Yonghui Huang, Yaqian Ren, Lu Ren, Yican Yan, Shuqin Ji, Shejiao Wang, Yanlong Kong
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引用次数: 0

摘要

井距的设计对地热能源开采的可持续性和经济效益有重大影响。然而,大多数研究主要采用与产热相关的参数作为井距指标,而基于经济模型的井距设计综合分析对于实际应用是非常必要的。本研究提出了一种考虑产热效益和运行成本的经济指标,并将其应用于渤海湾盆地典型的废弃油田--曹妃甸。该指标对定向井进行了细化描述,超越了粗略的表述,捕捉到了定向井在钻井配置中的适当复杂程度和行为。首先,通过整合热物理信息和以往石油调查的现场勘测数据,构建了一个异质三维模型,以预测 30 年的温度和压力演变。然后,提出了一种修正的热量平准化成本(LCOH-HT),用于在优化井距时进行经济分析,发现不同选定井的最佳井距范围为 300-600 米。与仅从产热考虑得出的结果相比,钻井和泵送成本导致基于所提方法的最佳井距减少了 300 米,因为井距越大,水力损失和钻井成本就越高,从而需要更大的泵送工作量和成本。这一发现强调了平衡经济和热能因素的必要性。此外,我们发现最佳井距在空间上的差异也是由孔隙度变化造成的。孔隙度会影响流体温度和压力,导致与压力波动相关的收益和成本发生变化。值得注意的是,这种新颖的经济分析方法并不局限于井距优化,它还可用于优化流速等运行参数,从而为地热能源开采提供实用的策略。
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Qualitative assessment of optimizing the well spacings based on the economic analysis

The design of well spacing significantly influences the sustainability and economic benefit of geothermal energy extraction. However, most studies have predominantly employed heat production-related parameters as indicators of well spacing, and a comprehensive analysis of well spacing design based on an economic model is necessary for practical implementation. In this study, an economic indicator considering the benefits derived from heat production and operating costs is proposed and applied in the Caofeidian, a typical abandoned oilfield in the Bohai Bay Basin. It offers a refined portrayal of directional wells, moving beyond rudimentary representations, to capture their appropriate degree of complexity and behavior in drilling configurations. First, by integrating thermophysical information and site investigation data from previous oil investigations, a heterogeneous 3D model is constructed to forecast the 30-year temperature and pressure evolution. Then, a modified levelized cost of heat (LCOH-HT) is proposed to perform economic analysis in optimizing the well spacing, revealing an optimal range of 300–600 m for the different selected wells. In comparison with results derived solely from heat production considerations, drilling and pumping costs contribute to a 300 m reduction in the optimal well spacing based on the proposed approach, as a larger well spacing leads to increased hydraulic losses and drilling cost, necessitating greater pumping efforts and costs. This finding underscores the need to balance economic and thermal considerations. In addition, we found the difference in the optimal well spacing in space is also caused by the porosity variations. Porosity affects fluid temperature and pressure, leading to changes in the benefits and costs associated with pressure fluctuations. Notably, this novel economic analysis method is not limited to spacing optimization; it can also be used to optimize operating parameters, such as the flow rate, which could provide practical strategies for geothermal energy extraction.

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来源期刊
Geothermal Energy
Geothermal Energy Earth and Planetary Sciences-Geotechnical Engineering and Engineering Geology
CiteScore
5.90
自引率
7.10%
发文量
25
审稿时长
8 weeks
期刊介绍: Geothermal Energy is a peer-reviewed fully open access journal published under the SpringerOpen brand. It focuses on fundamental and applied research needed to deploy technologies for developing and integrating geothermal energy as one key element in the future energy portfolio. Contributions include geological, geophysical, and geochemical studies; exploration of geothermal fields; reservoir characterization and modeling; development of productivity-enhancing methods; and approaches to achieve robust and economic plant operation. Geothermal Energy serves to examine the interaction of individual system components while taking the whole process into account, from the development of the reservoir to the economic provision of geothermal energy.
期刊最新文献
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