一种双子表面活性剂自转向酸的酸岩反应特性

Investigation on acid-rock reaction of a gemini surfactant-based diverting acid agents

粘弹性表面活性剂自转向酸在注入地层后酸岩反应酸增粘形成暂堵屏障使后续酸分流转向,能够较好地解决油田开发过程中地层CaCO_3垢堵塞的问题,同时可有效改造低渗透油层段。室内确定了一种适合于长庆油田三叠系中低温、高矿化度油藏的季铵盐双子表面活性剂自转向酸体系。酸岩反应特征是酸化酸压体系研究的重要内容,也是施工设计的重要依据。从溶蚀率和静态酸岩反应动力学考察了该自转向酸的酸岩反应特性。

Visco-elasticity surfactant diversion aciding（VDA）is considered to remove CaCO_3 scale in Changqing oilfield.Futher,using temporary plugging with high viscosity of VDA during acid-rock reaction in reservoir.the low-permeability reservoir can be reconstructed by following aciding agents.A ammonium gemini surfactant aciding system is made in laboratory, which can apply to Triassic and Jurassic reservoir of high salinity and low-medium temperature for Changqing Oilfield.Research of acid-rock reaction characteristics is a fundamental content for aciding systems and project design.The dissolution rate and static acidrock reaction kinetics is investigated for VDA in this paper.