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利用壁面剪应力提高固井水泥浆顶替效率的研究与应用
断块油气田
2006年 13卷 第06期
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Title
Study and Application of Enhancing Displacement Efficiency of Cement Slurry by Using Wall Shear Stress
单位
(长江大学石油工程学院, 湖北荆州434023 )
Organization
School of Petro leum Engineering,
Yangtze University, Jingzhou 434023, China
摘要
壁面剪应力设计方法, 从理论上把塞流顶替、低速顶替及紊流顶替技术统一起
来。对流变参数不再作特殊要求, 只要结合环空返速, 使摩阻大于一定数值即可。水泥浆环空
流动的壁面剪应力是影响顶替效率的关键因素。但要实现最终合格固井质量的目标, 还需要
从入井流体的整体设计考虑。
Abstract
W a ll shear stress m ethod integrates the plug flow
d isp lacing, the low speed displac ing and the turbulent flow
d isp lacing me thods in theory. Th is m ethod needs not spec ia l
requ irem ents on rheo log ica l pa ram e ters. It needs comb in ing
w ith the annu lus space speed and requ ires that friction is
larg er than a ce rtain num ber. The wa ll shea r stress caused by
cem ent slurry flow ing in the annu la r space is a key e lem ent
tha t affects the d isplacing effic iency. W e m ust take the
ove ra ll des ign of flu id in the we llbore into consideration if a
good cem enting qua lity is requ ired.
关键词：
壁面剪应力;
固井;
顶替效率;
深井;
Keywords:
W a ll shear stress, Cem enting,
Displacem en t effic iency, Deep well;
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