Influencing factors and countermeasures of inter-well interference of fracturing horizontal wells in Nanchuan shale gas field

LU Bi; HU Chunfeng; MA Jun

doi:10.13809/j.cnki.cn32-1825/te.2023.03.008

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Influencing factors and countermeasures of inter-well interference of fracturing horizontal wells in Nanchuan shale gas field
Issue 3, Pages: 330-339(2023)
Published：2023
DOI： 10.13809/j.cnki.cn32-1825/te.2023.03.008
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DOI：

LU Bi, HU Chunfeng, MA Jun. Influencing factors and countermeasures of inter-well interference of fracturing horizontal wells in Nanchuan shale gas field[J]. Petroleum Reservoir Evaluation and Development, 2023, (3): 330-339. DOI： 10.13809/j.cnki.cn32-1825/te.2023.03.008.

摘要

随着页岩气开发不断深入，水平井实施压裂过程中邻井的干扰现象日益增多，对气田的产量、套管的安全、气井的管柱造成较大影响，有待明确压裂井间干扰的影响因素及降低干扰的治理对策。采用井下压力监测的方式证实压裂井间干扰的矿场表现，通过生产动态跟踪分析及微地震监测结果基本明确井网井距、压裂改造强度、天然裂缝是影响压裂水平井井间干扰的主要因素。对降低压裂干扰提出了压裂设计源头优化、采气井现场管理、生产运行调整3种治理对策，在现场应用中获得了较好的效果。

Abstract

With the continuous development of shale gas

the interference of adjacent wells is increasing during the fracturing of horizontal wells

which has a great impact on the production of gas fields

the safety of casings

and the string of gas wells. The influencing factors of the interference between fracturing wells and the countermeasures to reduce the interference need to be clarified.The field performance of fracturing interwell interference is confirmed by downhole pressure monitoring. Through production dynamic tracking analysis and microseismic monitoring results

it is basically clear that well spacing

fracturing transformation intensity

and natural fractures are the main factors affecting the interference between horizontal wells during fracturing. Three governance strategies have been proposed to reduce fracturing interference

including optimization of fracturing design source

on-site management of gas production wells

and production operation adjustment. These measures have achieved good improvement effects in on-site applications.

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references

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