油气藏评价与开发 ›› 2023, Vol. 13 ›› Issue (4): 433-440.doi: 10.13809/j.cnki.cn32-1825/te.2023.04.004
收稿日期:
2023-04-10
发布日期:
2023-09-01
出版日期:
2023-08-26
作者简介:
孔祥伟(1982—),男,博士后,副教授,现从事油气井力学与工作液、储层改造等相关井筒力学研究。地址:湖北省武汉市蔡甸区大学路特1号,邮政编码:430100。E-mail:基金资助:
KONG Xiangwei1,2(),XIE Xin3,WANG Cunwu3,SHI Xian4
Received:
2023-04-10
Online:
2023-09-01
Published:
2023-08-26
摘要:
煤储层具有低孔、低渗和低压特征,实现煤层气工业开采主要依靠水力压裂等技术。沁水盆地柿庄区块目前日产量小于500 m3的气井占到50 %以上,气井改造后增产效果不理想,气井产能主控影响因素不清楚,直接影响气井整体产能的提升。基于煤层气井压裂及产能数据,利用灰色关联方法刻画了煤层气地质工程因素对压裂产能的影响程度,分析了气井压裂后产能主控影响因素。根据皮尔逊相关性分析方法,建立产能主控因素与气井产量的关联数学模型来预测气井产能,结合气井生产数据验证了预测模型可靠性。采用卡方自动交互检测决策树方法,建立了已压裂井地质和工程因素对气井产能影响关系分类决策树,高含气量条件下工程因素对气井产能提升影响较小,随着含气量降低,不同工程因素对气井产能的影响程度逐渐增大,有助于优化排量、砂量及总液量等主要设计参数,丰富了煤层气压裂后产能评价方法。
中图分类号:
Xiangwei KONG,Xin XIE,Cunwu WANG, et al. Evaluation of geological engineering factors for productivity of deep CBM well after fracturing based on grey correlation method[J]. Petroleum Reservoir Evaluation and Development, 2023, 13(4): 433-440.
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