Frac-hits and connections of multi-well hydrofracturing fracture network involving the variable factors: well spacing, perforation cluster spacing and injection rate

IF 1.5 4区 工程技术 Q3 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS
Yongliang Wang, Liangchun Li, Nana Liu
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引用次数: 0

Abstract

Purpose

With the development of fracturing technology, the research of multi-well hydrofracturing becomes the key issue. Frac-hits in multi-well hydrofracturing has an important effect on fracture propagation and final production of fractured well; in the process of hydrofracturing, there are many implement parameters that can affect frac-hits, and previous studies in this area have not systematically targeted the influence of a single parameter on multi-well hydrofracturing. Therefore, it is of great significance to study the occurrence rule and influence of frac-hits for optimizing the design of fracturing wells.

Design/methodology/approach

Based on the proposed numerical models, the effects of different fracturing implement parameters (perforation cluster spacing, well spacing and injection rate) on frac-hits are compared in numerical cases. Through the analysis of fracture network, stress field and microseismic, the effects of different fracturing implement parameters on frac-hits and connections are compared.

Findings

The simulation results show that the effect of perforation cluster spacing and well spacing on frac-hits is greater than that of injection rate. Smaller well spacing makes it easier for fractures between adjacent wells to interact with each other, which increases the risk of frac-hits and reduces the risk of fracture connections. Smaller perforation cluster spacing results in larger individual fracture lengths and greater deflection angles, which makes the possibility of frac-hits and connections greater. The lower the injection rate, the lower the probability of frac-hits.

Originality/value

In this study, the influence of different fracturing implement parameters on frac-hits and connections in multi-well hydrofracturing is studied, and the mechanism of frac-hits and connections is analyzed through fracture network, stress field and microseismic analysis. Different simulation results are compared to optimize fracturing well parameter design and provide reference for engineering application.

涉及井距、射孔群间距和注入率等可变因素的多井水力压裂压裂网络的压裂命中率和连接率
目的随着压裂技术的发展,多井水力压裂的研究成为关键问题。多井水力压裂中的压裂裂缝对压裂井的裂缝扩展和最终产量有着重要影响;在水力压裂过程中,影响压裂裂缝的实施参数有很多,以往这方面的研究没有系统地针对单一参数对多井水力压裂的影响进行研究。因此,研究压裂裂缝的发生规律和影响因素,对于优化压裂井的设计具有重要意义。设计/方法/途径基于提出的数值模型,在数值案例中比较了不同压裂实施参数(射孔群间距、井间距和注入率)对压裂裂缝的影响。模拟结果表明,射孔群间距和井距对压裂命中率的影响大于注入率对压裂命中率的影响。较小的井距使相邻油井之间的裂缝更容易相互影响,从而增加了压裂命中的风险,降低了裂缝连接的风险。射孔群间距越小,单个裂缝长度越长,偏转角度越大,压裂命中和连接的可能性就越大。本文研究了多井水力压裂中不同压裂实施参数对压裂命中和连接的影响,并通过压裂网络、应力场和微震分析,分析了压裂命中和连接的机理。对比不同的模拟结果,优化压裂井参数设计,为工程应用提供参考。
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来源期刊
Engineering Computations
Engineering Computations 工程技术-工程:综合
CiteScore
3.40
自引率
6.20%
发文量
61
审稿时长
5 months
期刊介绍: The journal presents its readers with broad coverage across all branches of engineering and science of the latest development and application of new solution algorithms, innovative numerical methods and/or solution techniques directed at the utilization of computational methods in engineering analysis, engineering design and practice. For more information visit: http://www.emeraldgrouppublishing.com/ec.htm
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