The rheological behavior of cement slurries is important in trying to prevent and eliminate
gas-migration related problems in oil well applications. In this paper, we review the …

We present an experimental study of buoyant displacement flows in vertical narrow
centric/eccentric annular configurations, representing the oilfield primary cementing process …

In the dogleg section of directional wells, casing strings bend to fit the borehole trajectory,
which may lead to complicated contact areas with the borehole. The severity of dogleg in …

The well trajectory of horizontal wells are constantly changing due to the variation of well
inclination and azimuth with depth, leading to a large difference of displacement efficiency in …

For a horizontal well cementing, successful displacement of the drilling mud from the
annulus using the cement slurry were paramount for achieving zonal isolation. This study …

摘要提高固井注水泥浆顶替效率是保障水泥环密封性能的前提, 已有的理论和实验室方法多集中
于两相流(钻井液/隔离液, 隔离液/水泥浆, 钻井液/水泥浆) 顶替模拟, 而与实际工况下钻井液与 …

Displacement efficiency of horizontal wells is mainly affected by casing eccentricity and
slurry column structure in the wellbore, and it is an essential precondition for ensuring …

CHEN Lili, GUO Jianhua, LIU Sen, et al. Optimization analysis of slurry column structure to
improve cement displacement efficiency in eccentric annulus [J]. Drilling Fluid & Completion …

Cementing operations are of major importance to the long‐term zonal isolation and safety of
oil and gas wells. As one of the well barriers, the cement sheath is key to the long‐term …

This paper investigates the impact of temperature on the rheological behavior of cement
slurry and drilling fluid and examines how various factors, such as displacement speed …