摘要
为进一步提高水驱采收率,薛岔油区实施了表面活性剂驱矿场试验。试验结果表明,表面活性剂驱有效抑制了单井产量递减,单井日产油量提高。在水下分流河道主体砂体上,砂层厚度、孔隙度、渗透率值相对较大,表面活性剂可以更好地驱替残余油,见效更明显。表面活性剂可以使得油水等渗点右移,岩石表面亲水性进一步增强,使油水两相相对渗透率均得到提高,薛岔试验区注入压力下降0.7 MPa,也证实了驱油剂将近井地带残余油被驱替,水相渗透率得到提高。
In order to further improve the water flooding recovery,field test of surfactant flooding was conducted in the Xuecha area.The test results show that the surfaetant flooding can effectively inhibits production decline of single well and daily oil production of single well increases.The value of thickness,porosity and permeability is relatively large in the sandstone of underwater distributary channel face,the agent can displace residual oil with the more obvious effect.Surfaetant agent can drive isotonic point between oil and water to fight, improve hydrophilicity of the rock surface and further enhance both oil and water relative permeability.The injection pressure drops by 0.7 MPa in Xuecha area,which can also con- firms the surfactant agent displaces the residual oil near the wellbore and water permeability increases.
出处
《石油化工应用》
CAS
2014年第2期55-58,62,共5页
Petrochemical Industry Application
关键词
低渗透
表面活性剂驱
沉积相
相对渗透率
注入压力
low permeability
surfactant flooding
sedimentary face
relative permeability
injection pressure
