摘要
针对渤海SZ36-1油田高温、高盐、大井距对注聚用聚合物剪切稳定性的要求,进行了SZ36-1油藏条件下,Na+、K+、Ca2+、Mg2+等离子对缔合聚合物AP-P4溶液黏度剪切保留率的影响研究。研究发现,影响缔合聚合物溶液黏度剪切保留率的关键因素是溶液中的Ca2+、Mg2+;在Na+、K+浓度小于10 000 mg/L时,其存在有益于提高溶液黏度的剪切保留率;Ca2+、Mg2+浓度超过400 mg/L时,溶液黏度的剪切保留率开始明显降低;在Ca2+、Mg2+浓度低于100 mg/L时,其存在有助于提高溶液黏度剪切保留率。在模拟渤海SZ36-1油田注聚水源井A15井的水质条件下,证实了Ca2+、Mg2+是影响缔合聚合物AP-P4黏度剪切稳定性的关键因素。
The characteristics of high temperature, high salt and wide well spacing in Bohai SZ36-1 oil field request good shear stability of injected polymer. Under reservior conditions, a.study was carried out on how the ion （including Na^＋, K^＋, Ca^2＋ and Mg^2＋） affected viscosity shear retention rate of associating polymer AP-P4 solution. It is found that the key element is Ca^2＋ and Mg^＋2＋ in the solution. Existence ofNa^＋ and K^＋ can enhance shear retention rate when concentration is 〈 10,000mg/L. Viscosity shear retention rate starts obviously to reduce when concentration of Ca^2＋ and Mg^2＋ is 〉 400mg/L ,while Ca^2＋ and Mg^2＋ can enhance shear retention rate when concentration is 〈 100 mg/L. Simulating water quality of the water source well A15 in the Bohai SZ36-1 oil field, it has been confirmed that Ca^2＋ and Mg^2＋ in the solution are the key factors to affect the viscosity shear stability of association polymer AP-P4.
出处
《石油钻采工艺》
CAS
CSCD
北大核心
2008年第4期96-99,共4页
Oil Drilling & Production Technology
基金
国家"十一五"863项目"渤海油田聚合物驱提高采收率技术研究"(编号:2007AA090701)资助
关键词
渤海油田
缔合聚合物
黏度
剪切保留率
阳离子
影响因素
Bohai Oil field
associating polymer ,viscosity, shear retention rate, cations
influencing factors
