摘要
河套盆地临河坳陷吉兰泰凹陷吉华2断块渐新统临河组疏松砂砾岩储层成熟度低、胶结性差、岩石强度低、黏土含量高、部分层段原油黏度高,导致油田开发过程中产量降低明显。本次研究中,开发应用弱酸性表活剂降黏解堵技术,利用液体弱酸性溶解部分黏土矿物以疏通渗流通道,通过表活剂裂解乳化作用降低原油黏度来提升原油渗流能力。该方法经现场应用,与改造前相比,措施层日产原油由0.38 m 3提升至63.91 m 3,实现了“产量提升与储层保护”的双重目标。
The unconsolidated sandy conglomerate of the Eocene Linhe Formation has been proved as an effective reservoir in the Jihua 2 fault block of the Jilantai sag of the Linhe depression in the Hetao Basin.Because of its low maturity,poor cementation,weak rock strength,high clay mineral content,and high oil viscosity in certain intervals,the productivity of the sandy conglomerate reservoir has been significantly descended.In this study,a weakly acidic surfactant is developed and applied to decrease the viscosity of oil and remove plugs out of reservoir.The weakly acid is used to dissolve part of the clay minerals and unclog the seepage channels.The pyrolysis and emulsification function of the surfactant can decrease the viscosity and thus improve the seepage capability of oil.The method was successfully applied in well treatment,through which the daily well production increased from 0.38 m 3/d to 63.91 m 3/d.The double targets of‘production increase and reservoir protection at the same time’have been realized.
作者
屈兴华
钟世铭
黄军英
杨昱
乔磊
田娜娟
邱杨
QU Xing-hua;ZHONG Shi-ming;HUANG Jun-ying;YANG Yu;QIAO Lei;TIAN Na-juan;QIU Yang(Geology Institute of CNPC Bohai Drilling Engineering Company Limited,Renqiu 062550,Hebei,China;The Second Well Cementation Branch of CNPC Bohai Drilling Engineering Company Limited,Tianjin 300280,China;Development Department of Huabei Oilfield,Renqiu 062552,Hebei,China;Technique Department of CNPC Bohai Drilling Engineering Company Limited,Tianjin 300450,China;Gas Storage Management Department of Huabei Oilfield,Renqiu 062552,Hebei,China;Tianjin Branch of CNOOC,Tianjin 300452,China)
出处
《世界地质》
CAS
2021年第3期624-631,共8页
World Geology
基金
华北油田生产先导项目吉华2断块疏松砂砾岩储层增产及射孔优化技术研究项目(HBYT-2019-JS-280)。
关键词
疏松砂砾岩储层
弱酸性表活剂
降黏
解堵
吉兰泰油田
unconsolidated sandy conglomerate reservoir
weakly acidic surfactant
viscosity reducing
plug removing
Jilantai oilfield
