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长庆油田宽带压裂储层产能模型及渗流规律研究

李建辉 李想 岳明 达引朋 董奇 常笃

李建辉,李想,岳明,等. 长庆油田宽带压裂储层产能模型及渗流规律研究[J]. 石油钻探技术,2022, 50(6):112-119 doi: 10.11911/syztjs.2022085
引用本文: 李建辉,李想,岳明,等. 长庆油田宽带压裂储层产能模型及渗流规律研究[J]. 石油钻探技术,2022, 50(6):112-119 doi: 10.11911/syztjs.2022085
LI Jianhui, LI Xiang, YUE Ming, et al. Productivity model and seepage rules for the broadband fracturing of ultra-low permeability reservoirs in Changqing Oilfield [J]. Petroleum Drilling Techniques,2022, 50(6):112-119 doi: 10.11911/syztjs.2022085
Citation: LI Jianhui, LI Xiang, YUE Ming, et al. Productivity model and seepage rules for the broadband fracturing of ultra-low permeability reservoirs in Changqing Oilfield [J]. Petroleum Drilling Techniques,2022, 50(6):112-119 doi: 10.11911/syztjs.2022085

长庆油田宽带压裂储层产能模型及渗流规律研究

doi: 10.11911/syztjs.2022085
基金项目: 国家自然科学基金项目“考虑微观力作用的纳微米孔隙流动理论及模拟研究”(编号:51974013)、中央高校基本科研业务费项目“页岩油高效开发理论和关键技术及应用”(编号:FRF-TP-20-006A1)、国家科技重大专项“低渗—超低渗油藏有效开发关键技术”(编号:2017ZX05013)、中国石油重大科技专项“长庆油田5000万吨持续高效稳产关键技术研究与应用”(编号:2016E-05)联合资助
详细信息
    作者简介:

    李建辉(1985—),男,陕西西安人,2009年毕业于西南石油大学石油工程专业,2012年获西南石油大学油气田开发工程专业硕士学位,工程师,主要从事压裂酸化技术研究与应用方面的工作。E-mail: ljhui_cq@petrochina.com.cn。

  • 中图分类号: TE348

Productivity Model and Seepage Rules for the Broadband Fracturing of Ultra-Low Permeability Reservoirs in Changqing Oilfield

  • 摘要:

    长庆油田超低渗透油藏具有储层致密、物性差和非均质性强等特征,采用宽带压裂技术提高了开发效果,实现了增油降水的目的,但目前仍缺乏理论产能模型,存在对水驱机理认识不清的问题。为了准确评价长庆油田宽带压裂改造的增产作用,进一步揭示油水渗流规律,基于油水两相流体的流动形态,将注水井的渗流物理场划分为主裂缝内线性流、宽带区椭圆流和基质区圆形径向流等3个区域;根据等值渗流阻力法,建立了菱形反九点井网宽带压裂非达西渗流的产能模型;以实际井组为例,采用数值计算方法,计算分析了宽带区的带宽及等效渗透率对井网产能的影响,探究了日产液量的变化规律。研究结果表明,宽带压裂技术可显著提高井网的日产油量、采出程度和日产液量,可扩大侧向波及体积,改善水驱的均匀性,提高井网的产能。该研究成果为油田现场优化宽带压裂技术应用提供了理论支持。

     

  • 图 1  注水井宽带压裂渗流区域示意

    Figure 1.  Seepage zones around water injection well by broadband fracturing

    图 2  菱形反九点井网宽带压裂的渗流区域示意

    Figure 2.  Seepage zones in diamond inverted nine-spot well pattern after broadband fracturing

    图 3  元306-611井组实际生产数据与数值计算结果对比

    Figure 3.  Comparison of actual production data with numerical computation results of Well Group Yuan 306-611

    图 4  带宽对井网日产油量和采出程度的影响

    Figure 4.  Influence of broadband width on daily oil production and recovery degree of well pattern

    图 5  宽带区的等效渗透率对井网日产油量和采出程度的影响

    Figure 5.  Influence of equivalent permeability in broadband zone on daily oil production and recovery degree of well pattern

    图 6  短边角井和长边角井的日产液量对比

    Figure 6.  Comparison between daily liquid production of short corner well and long corner well

    图 7  日注入水量对短边角井日产液量的影响

    Figure 7.  Influence of daily water injection rate on dailyliquid production of short corner well

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  • 收稿日期:  2021-10-26
  • 修回日期:  2022-07-07
  • 网络出版日期:  2022-11-08

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