储层矿物上表面活性剂损耗规律的研究

A STUDY ON CONSUMPTION OF SURFACTANT BY RESERVOIR MINERALS

本文在结合大庆油田三元复合驱 (ASP)的地质条件下 ,系统评价了在ASP体系中表面活性剂测定方法 ,研究了储层中不同单矿物与表面活性剂间相互作用机理、损耗规律及其影响因素 ,复合矿物组合对表面活性剂损耗的协同效应。研究表明储层中粘土矿物的表面活性剂损耗量明显大于储层中其它矿物颗粒的表面活性剂损耗量 ,为其 4— 5倍 ;ASP复合体系中表面活性剂的损耗量为单一表面活性剂体系中的 2— 5倍 ;表面活性剂损耗量大的矿物 。

The consumption of a sulfonate surfactant(Witcos ORS41) by various minerals is determined through static adsorption from solution at 45℃(an average reservoir temperature in Daqing) up to 1 600 hrs. The mineral samples used are: single clay(3) and carcase(3) minerals; binary(6) and ternary(2) mineral combinations; Daqing reservoir sands. The solutions used are:0.3% ORS41 solution and 0.3% ORS41/1.2% NaOH/0.2% HPAM (ASP) solution. It is shown that the surfactant Consumption by clay minerals is 4—5 times higher than that by acrcase minerals; the surfactant consumption in the ASP solution is 2—5 times higher than that in the surfactant solution; a high surfactant consuming mineral constitutes mineral combinations of high surfactant consumption.