摘要
为探究WZ12-2流二段储层岩心的敏感性条件,为油气田开发和储层保护提供理论上的依据,在对WZ12-2流二段储层岩心储层特性(储层岩石特征、储层物性、孔隙结构特征、地层水性质、温度和压力)进行分析的基础上开展了对WZ12-2油田流二段储层岩心敏感性(水速敏感性、水敏感性、盐度敏感性、碱敏感性、应力敏感性)的室内试验研究。研究结果显示,流二段储层存在中等偏弱水速敏,临界流速3.99ml/min;强水敏感性,临界矿化度4350~12229.5mg/L;强盐敏感性;中等偏弱酸敏;中等偏弱碱敏,临界pH值为7~8;强应力敏感性,临界应力为5.0MPa。
In order to explore the sensitivity of reservoir cores in the 2nd member of Liushagang Formation of WZ12-2Oilfield,provide a theoretical basis for oil and gas field development and reservoir protection,the sensitivities(the sensitivities of water velocity,water sensitivity,salinity sensitivity,alkali sensitivity and stress sensitivity)in the 2nd member of Liushagang Formation of WZ12-2Oilfield was tested in laboratory by analyzing its core sensitivity characteristics(including the reservoir core characteristics,reservoir property,the characteristics of pore structure,the quality of formation water,temperature and pressure).The results show that there exists a middle to weak water velocity sensitivity in the formation,the critical flow velocity is 3.99ml/min,the water sensitivity is strong,the critical salinity is 4350~12229.5mg/L,the salinity sensitivity is strong,the acid sensitivity is weak-medium and the base sensitivity is mid to weak,the critical pH is 7with strong stress sensitivity,the critical stress is 3.5MPa.
出处
《长江大学学报（自科版）（上旬）》
CAS
2015年第2期22-24,28,共4页
JOURNAL OF YANGTZE UNIVERSITY (NATURAL SCIENCE EDITION) SCI ＆ ENG
基金
中海油湛江分公司科技攻关项目(CCL2013ZJFN1051)
关键词
WZ12-2油田
流二段
黏土矿物
储层损害
敏感性评价
WZ12-2Oilfield
2nd member of Liushagang Formation
clay mineral
formation damage
sensitivity evaluation
