储层矿物对聚丙烯酰胺耗损规律研究  

A Study of Adsorption Consumption of Polyacrylamide on Reservoir Minerals

作　　者：唐洪明[1] 孟英峰[1] 杨潇 陈忠[1] 

机构地区：[1]西南石油学院石工院,四川南充637001 [2]南充炼油化工总厂,四川南充637001

出　　处：《油田化学》2001年第4期342-346,共5页Oilfield Chemistry

基　　金：油气藏地质及开发工程国家重点实验室开放基金项目PLNO114部分研究成果

摘　　要：实验研究了一种典型的大庆油田砂岩储层岩心 ,岩心的骨架矿物石英、钾长石和斜长石 ,粘土矿物高岭石、伊利石和绿泥石 ,等质量比的各种骨架和粘土矿物组合在 45℃、静态条件下对聚合物HPAM (M =1.5× 10 7,HD =2 6 .5 % )的吸附。HPAM溶液用矿化度 6 492mg/L的模拟地层水配制。HPAM浓度用酸 /次氯酸钠沉淀浊度法测定。实验研究结果如下 :HPAM的吸附在 16 0 0h时尚未达到平衡 ,前 4h吸附速率高 ;在粘土矿物上的吸附量为骨架矿物上吸附量的 10— 4倍 ;在粘土矿物中绿泥石的吸附量最高 (2 .5mg/ g) ,在骨架矿物中石英的吸附量最高(0 .6mg/g) ;在二元粘土矿物组合上的吸附量比单粘土矿物上高 0 .1— 0 .3mg/ g ,在二元骨架矿物的吸附中石英起主要作用 ;HPAM在储层岩心上的吸附量为 2 .0mg/L ,略低于三元粘土矿物组合上的吸附量而高于三元骨架矿物组合上的吸附量 ,表明了粘土矿物的主导作用。讨论了HPAM在储层矿物上的吸附机理和影响吸附 (和滞留 )的因素。The Adsorption of HAPM ( M=1.5×10 7, HD=26.5% ) from solution in brine ( TSD =6 492 mg/L) is investigated on a typical Daqing reservoir core, on quartz, potassic feldspar, and plagioclase feldspar as its main matrix minerals, on kaolinite, illite, and chlorite as its main clay minerats, and on various mineral combinations of equal mass ratio at 45℃ and static conditions. The HPAM concentration is determined by using an acid/hypochlorite precipitation/turbidity method. Following experimental results are obtained: the HPAM adsorption does not reach its equillibrium in 1 600 hrs and proceeds fast initially in 4 hrs; the adsorption is by 10-4 times larger on the clay minerals than that on the matrix minerals; of the clay minerals chlorite shows the highest adsorbability for HPAM (2.5 mg/g) and of the matix minerals-quartz (0.6 mg/g); the adsorption on the binary clay combinations is by 0.1- 0.3 mg/g higher than that on the single clay minerals; quartz plays a main role in the adsorption of HPAM on the binary matrix combinations; the HPAM adsorption on the reservoir core sand is of 2.0 mg/g, being slightly lower than that on the tertiary clay combination and much higher than that on the tertiary matrix combination which shows the prior role of clay minerals. The mechanisms involved in and the factors influencing on HPAM adsorption on reservoir minerals are discussed.

关 键 词：聚丙烯酰胺 HPAM 溶液吸附 粘土矿物 骨架矿物 砂岩储层岩心 大庆油田 驱油聚合物 

分 类 号：TE39[石油与天然气工程—油气田开发工程] TE357.46