大港低孔低渗油田欠注井治理对策研究  

Countermeasures research on under injection wells in low porosity and permeability Dagang oilfield

作　　者：杨静[1] 宋友贵[1] 孙连杰[1] 张鹏飞[1] 杨莉[2] 王慧慧[1] 

机构地区：[1]中国石油大港油田公司采油工艺研究院,天津大港300280 [2]中国石油大港油田公司石油工程研究院

出　　处：《石油地质与工程》2013年第3期134-135,138,共3页Petroleum Geology and Engineering

摘　　要：大港南部油田储层低孔低渗,敏感性强,且地层水矿化度高,造成注水井油田注水压力以年均0.8～1.5 MPa的速度上升,给安全生产造成隐患。通过对南部油田油层岩性、物性、水质等影响因素分析,并结合注水井吸水曲线特征,进行了不同类型油藏针对性的酸化、降压增注工艺的优化,优化工艺实施后注水能力平均提高50%以上,注水压力降低2～10 MPa,取得了明显的降压增注效果。Southern reservoir of Dagang oilfield has characteristics of low permeability,low porosity,strong sensitivity,and high salinity formation water,which causes water injection pressure go up at an average speed of 0.8~1.5 MPa,and brings trouble to the production safety.By analyzing the influencing factors such as reservoir lithology,physical properties,and water quality etc,and combined with the characteristics of the water injection well curve for the different kinds of reservoir water injection well,the acidification and acid fracturing technology of depressurization have been optimized,which achieves obvious effect.

关 键 词：大港南部油田 增注技术 地层敏感性 

分 类 号：TE348[石油与天然气工程—油气田开发工程]