文章摘要
页岩气水平井不同压裂模式改造效果分析
Analysis of different fracturing modes of shale gas horizontal well
投稿时间:2018-03-19  修订日期:2018-03-19
DOI:
中文关键词: 页岩气压裂  效果评价 改造体积  裂缝形态
英文关键词: shale gas fracturing  effect evaluation  stimulation volume  fracture morphology
基金项目:国家科技重大专项“大型油气田及煤层气开发”下属项目“四川盆地及周缘页岩气形成富集条件、选区评价技术与应用”(编号:2017ZX05035004)
作者单位邮编
刘吉 中国石油集团长城钻探工程有限公司地质研究院 124000
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中文摘要:
      页岩储层孔渗条件差,水平井多级分段压裂是开采页岩气藏的必要措施。为评价页岩气水平井不同压裂模式的压裂改造效果,优选压裂工艺,对威远地区两口页岩气水平井的地质条件、压裂工艺、测试及生产数据进行分析,通过模拟得到压后裂缝形态及改造体积,结果表明,采用“低粘滑溜水段塞式加砂”工艺的井与采用“低粘滑溜水+交联胶连续加砂”工艺的井相比,测试产量基本相当,但单井返排率、累计产量及预测EUR相差较大,前者的压后裂缝形态更为复杂,改造体积更大。分析表明 “低粘滑溜水段塞式加砂”压裂工艺效果更好,更能满足威远地区页岩气开发的需求。
英文摘要:
      The permeability of shale reservoir is poor, and multi-stage fracturing of horizontal well is necessary for exploiting shale gas reservoir. For evaluating fracturing effect of shale gas horizontal well of different fracturing mode, optimizing fracturing technology, through analysis of geological condition、fracturing technology、test and production data of two shale gas horizontal well in Weiyuan area, fracture morphology and stimulation volume after fracturing are obtained by simulation, the results show that compared to the well which used “low viscosity of slick water+ sand fracturing by gel continuously” pattern, the test production of the other well that used “sand slug with low viscosity slick water ” pattern is nearly the same, but the well flowback rate、cumulative production and predict EUR have a large differences. The former well has more complicated fracture morphology and larger stimulation volume. The analysis shows that the fracturing pattern of “sand slug with low viscosity slick water” is better, and it can meet the demand of shale gas development in Weiyuan area.
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