Mitigating Interwell Fracturing Interference: Numerical Investigation of Parent Wells Depletion Affecting Infill Well Stimulation

IF 2.6 3区 工程技术 Q3 ENERGY & FUELS Journal of Energy Resources Technology-transactions of The Asme Pub Date : 2023-09-22 DOI:10.1115/1.4063490
Wendong Wang, Wenfeng Yu, Wang Sukai, Zhang Lipeng, Zhang Qian, Su Yuliang
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Abstract

Abstract Frac hits was not unfamiliar in tight gas development. During the hydraulic fracturing process in infill well, due to closely spaced wells and parent well depletion, operators often encounter communication between the fractures of parent and infill wells, resulting in frac hits. This phenomenon typically has a significant impact on the productivity of both infill and parent wells. However, effectively mitigating and minimizing the negative effects of frac hits remains challenging. We established a new frac hit mechanism and an evaluation and management workflow, aims to investigate the mechanism of frac hits between infill well and parent well and improve the performance of infill well while avoiding frac hits. The results indicate that an increased extent of parent well depletion leads to higher surrounding rock pressure and stress depletion. The stress deflection region near the fracture tip of the parent well attracts the propagation of infill well fractures, resulting in frac hits and significantly affecting the performance of parent well. Consequently, optimizing the timing of hydraulic fracturing in the infill well is beneficial for mitigating parent well depletion, controlling frac hits, and enhancing gas well productivity. This research provides important insights into mitigating parent-infill well interference in the development of tight gas reservoirs and establishes a solid foundation for future studies.
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减轻井间压裂干扰:母井枯竭对充填井增产影响的数值研究
压裂冲击在致密气开发中并不陌生。在填充井水力压裂过程中,由于井间距紧密,母井枯竭,作业人员经常会遇到母井与填充井裂缝之间的连通性,导致压裂命中。这种现象通常会对填充井和母井的产能产生重大影响。然而,有效地减轻和最小化压裂冲击的负面影响仍然是一个挑战。建立了新的压裂冲击机制和评价管理工作流程,旨在研究充填井与母井之间的压裂冲击机理,在避免压裂冲击的同时提高充填井的产能。结果表明,随着母井衰竭程度的增加,围岩压力和应力损耗也会增大。母井裂缝尖端附近的应力偏转区吸引了填充井裂缝的扩展,造成裂缝冲击,严重影响母井的生产性能。因此,优化充填井水力压裂时机有利于减轻母井枯竭、控制裂缝冲击、提高气井产能。该研究为减轻致密气藏开发过程中母井干扰提供了重要见解,为后续研究奠定了坚实基础。
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来源期刊
CiteScore
6.40
自引率
30.00%
发文量
213
审稿时长
4.5 months
期刊介绍: Specific areas of importance including, but not limited to: Fundamentals of thermodynamics such as energy, entropy and exergy, laws of thermodynamics; Thermoeconomics; Alternative and renewable energy sources; Internal combustion engines; (Geo) thermal energy storage and conversion systems; Fundamental combustion of fuels; Energy resource recovery from biomass and solid wastes; Carbon capture; Land and offshore wells drilling; Production and reservoir engineering;, Economics of energy resource exploitation
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