顶部水泥脉冲振动的理论研究

THEORETICAL STUDY OF TOP CEMENT PULSATION

练章华 蒋洪 李文魁

Lian Zhanghua Jiang Hong Li Wenkui

西南石油学院, 四川南充 637001 西安石油学院, 陕西西安 710065

介绍了复杂地质条件下固井新技术-顶部水泥脉冲振动技术[1,2],能延缓水泥浆的静水压力损失,并能有效地预防复杂地质条件下固井时气窜,提高固井质量。文中列出了该项技术的基本原理、目的以及拟解决的关键问题等,为顶部水泥脉冲振动理论研究提供了简捷的思路,同时主要讨论了这一新技术的理论研究成果[3],即顶部水泥脉冲振动波动方程、边界条件及初始条件与顶部设备空气压缩机和空气脉冲发生器输出参数的相互调节关系,为固井时顶部水泥脉冲振动的优化设计、压缩机的优化及优选提供了理论依据。

Top cement pulsation (TCP) is a new cementing technology suitable for complex formations, and it can delay the static pressure loss of slurry, effectively prevent gas migration and improve cement bond logging quality, so the cementing quality is improved. In mechanism of delaying the static pressure loss, it is similar with that of casing vibration and rotation, but TCP is more practical and effective. This paper describes the involved basic theory, objectives, and key problems of this technology, and discusses the achievements, i.e., the mutual adjusted relations between the top cement pulsation equations, boundary and initial conditions and the output parameters of top equipment. It also provides a theoretical foundation for the optimal design of top cement pulsation and the compressor parameters.

10.3969/j.issn.1000-7393.2000.03.003