高盐油藏表面活性剂的适应性及作用机制--以雁木西油田为例  

Adaptability and Mechanism of Surfactant in High-salt Reservoirs—Taking Yanmuxi Oilfield of Tuha as an Example

作　　者：郑锐 李南星 李乾 李慧 周小淞 ZHENG Rui;LI Nanxing;LI Qian;LI Hui;ZHOU Xiaosong(Research Institute of Engineering and Technology,Tuha Oilfield Branch Company,PetroChina,Shanshan,Xinjiang 838200,P R of China)

机构地区：[1]中国石油吐哈油田分公司工程技术研究院,新疆鄯善838200

出　　处：《油田化学》2021年第4期665-670,共6页Oilfield Chemistry

基　　金：中国石油天然气股份有限公司科学研究与技术开发项目“新疆油田和吐哈油田勘探开发关键技术研究与应用”(项目编号2017E-0407)。

摘　　要：针对雁木西油田高盐油藏储层特征和提高采收率技术需求,本文开展了耐盐表面活性剂研制和油藏适应性研究。结果表明,非离子表面活性剂复合体系DW-01具有界面张力低、抗吸附能力强、发泡效果好和驱油效率高等特点,DWW-01质量分数超过0.05%后可使油水界面张力达到超低数量级(10^(-3)mN/m),与油砂3次吸附后油水界面张力仍可达10^(-2)mN/m数量级,水驱后注入0.4 PV的质量分数0.3%的DW-01采收率增幅超过8%,与目标油藏具有良好适应性。水驱后表面活性剂主要沿水驱形成优势通道流动,水驱未波及区域的波及程度较低,表面活性剂必须与其他液流转向措施联合使用才能取得较好增油降水效果。Aiming at the characteristics of high-salt reservoirs in Yanmuxi oilfield and the technical requirements for enhanced oil recovery,the development of salt tolerant surfactant and reservoir adaptability was carried out.The results showed that the nonionic surfactant composite system DW-01 had the characteristics of low interfacial tension,strong anti-adsorption ability,excellent foaming effect and high oil displacement efficiency.When the concentration of DW-01 exceeded 0.05%,the oil-water interfacial tension could achieve ultra-low interfacial tension(10^(-3)mN/m)and could still reach the order of 10^(-2)mN/m after three times contact with oil sands.The injection of 0.4 PV DW-01 solution with the concentration of 0.3%could enhance oil recovery by more than 8%after water flooding,indicating that DW-01 had wonderful adaptability to the target reservoir.After water flooding,the surfactant mainly flowed along the dominant channel formed by water flooding,and unaffected area of water flooding was low.Hence,the surfactant must be used in combination with other flow diversion measures to achieve better increasing oil and decreasing water cut effect.

关 键 词：雁木西油田 表面活性剂 油藏适应性 物理模拟 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]