石油钻采工艺2025，Vol.47Issue(2)：197-206,10.DOI:10.13639/j.odpt.202504010
吐哈油田牛东火山岩油藏水平井重复压裂技术
Refracturing technology for horizontal wells in Niudong volcanic reservoir of Tuha Oilfield
摘要
Abstract
To address the challenges of rapid production decline and low recovery in horizontal wells after volumetric fracturing in Niudong volcanic unconventional reservoirs of Tuha Oilfield,this study innovatively proposes a multi-stage diversion re-fracturing technology integrating"subdivided perforation+pre-fracturing energy replenishment+enlarged stimulated reservoir volume",along with precise staged re-fracturing techniques.Systematic research on energy storage mechanisms and reservoir fracability evaluation has optimized key parameters including energy-carrying media,injection volume,diversion stages,and diverter particle size distribution.A comprehensive technical system was established,incorporating well/interval selection criteria,subdivided perforation,pre-fracturing energy injection,full-well multi-stage diversion,and precise staged re-fracturing.Field tests during 2023-2024 on 15 wells in Niudong Block achieved 100%operational success with 86.7%effectiveness,delivering average incremental production of 4.7 t/d per well(cumulative 832 t)and an attractive input-output ratio of 1.18.This successful practice provides a replicable technical template and valuable field experience for enhancing production and recovery in underperforming horizontal wells of Tuha Oilfield's unconventional reservoirs.关键词
火山岩/水平井/重复压裂/多级暂堵/精细选段/能量补充/吐哈油田Key words
volcanic rock/horizontal well/re-fracturing/multi-stage diversion/precision staging/energy replenishment/Tuha Oilfield分类
能源科技引用本文复制引用
张坚平,董双福,向洪,王静,冀瑜,苏云磊..吐哈油田牛东火山岩油藏水平井重复压裂技术[J].石油钻采工艺,2025,47(2):197-206,10.基金项目
中国石油油气新能源公司C3类科技项目"老井直井/定向井重复压裂技术完善与推广应用"(编号:2023YQ305). （编号:2023YQ305）
