天然气工业2009，Vol.29Issue(10)：54-56,3.DOI:10.3787/j.issn.1000-0976.2009.10.016
超细低密度水泥浆的研制及其应用
Development of superfine and low-density cement slurry and its application in the LG gas field
摘要
Abstract
The sections to be cemented in "three highs (high pressure, high H2S, highly risk)" gas wells at the LG gas field are normally long, the hole conditions are complicated for cementing job, which therefore exerts high requirements on cement slurry systems. The conventional low-density slurry cannot meet the cementing quality requirements. Therefore the superfine cement and the micro-silicon are introduced, and the performance of the cement slurry is largely improved through multiple grain gradation, and optimization of the grain-size distribution of each component, thus making the system more closely-grained. This system with a density of 1.20 - 1.50 g/cm~3 has the properties of good rheology, short thickening time, good gel strength development pattern, high gas-channeling prevention capability and low API water loss. The cement stones formed have high and early strength, lower permeability and better loss-prevention and plugging capability. And the density of the slurry system will be kept constant under the pressure of bottomhole, all other indexes are equivalent to those of the cement slurry with conventional density. The log curves of all applications in more than 20 wells show good cementing quality.关键词
深井/超深井/气井/超细水泥/低密度水泥浆/渗透率/四川油气田Key words
deep well/ultra-deep well/gas well/super-fine cement/low-density cement slurry/permeability/Sichuan gasfield/cementing/slurry density/slurry rheology/bottomhole pressure/slurry performance分类
能源科技引用本文复制引用
张成金,严海兵,冷永红..超细低密度水泥浆的研制及其应用[J].天然气工业,2009,29(10):54-56,3.基金项目
本文为中国石油天然气集团公司先导性项目(编号:07G2030206)的研究成果. （编号:07G2030206）
