固井工程中的流动问题

同井是油气在建过程中的重要工程，一般分下套管和注水泥两个过程．本文结合作者近年来的研究，着重阐述了钻井液、前置液、水泥浆在环形空间中流动的流体力学问题，包括：高温高压下的水泥浆流变性、偏心环形空间中浆液的流动特性、钻井液-前置液和前置液-水泥浆界面的稳定性等，介绍了国内外学者对这些问题的研究进展，提出了今后应深入研究的问题.

<span style="color: rgb(51, 51, 51); font-family: arial, helvetica, sans-serif; font-size: 13px; line-height: 22px; background-color: rgb(248, 248, 248);">ell cementing is an important operation in the construction of any oil well. After a section of the steel casing is inserted into the hole, a sequence of cement slurry is pumped down the inside of the tubing and coming back up through the annular gap, and then allowed to settle in the annulus. Several fluid mechanics problems are discussed in the present paper, such as, how to determine the mechanical models for describing rheological behavior of cementing slurry at high temperature and high pressure, the influences of eccentricities on slurry flow, and the stability of the interface between slurry and spacer. This paper briefly reviews the latest investigations on fluid mechanics problems, and some important directions for future researches are pointed out.</span>