钻井液与完井液2016，Vol.33Issue(6)：91-94,4.DOI:10.3696/j.issn.1001-5620.2016.06.016
高密度防窜水泥浆在红北1井的应用
Anti-channeling High Density Cement Slurry Used in Cementing Well Hongbei-1
摘要
Abstract
The well Hongbei-1 is a well with the first class well control risk drilled in the Qinghai oilfield.It is also a well with the highest formation pressure drilled in that oilfield.A high density (2.4 g/cm3) anti-channeling cement slurry was developed to cope with the cement slurry channeling.Hematite,a weighting material that needs less water in formulating drilling fluid,was selected to weight the cement slurry.To enhance the stability of the cement slurry,an ultra-fine amorphous particles,CEA-1,was used as extender.CEA-1 has the ability to adsorb large amount of free water and has a higher reactivity.An anti-channeling agent,FLOK-2,was developed by mixing a latex fiber as the primary component,with CaCl2 and K2O as the secondary components.A high performance friction reducer,FS-13L,was developed by reaction between carboxylic acid as the primary raw material,and sodium sulfite as the secondary raw material.Laboratory experiment has shown that the SPN of the cement slurry was ＜ 3.When temperature changed by ± 5 ℃,the thickening time of the cement slurry changed by less than 44 min.When the density of the cement slurry changed by ± 0.05 g/cm3,the flow index of the cement slurry varied between 0.71 and 0.59,and the consistency factor varied between 1.06 mPa · sn and 3.14 mPa · sn.A flushing spacer compatible with the drilling fluid used was also developed.The composition of the spacer is:water + 320％ hematite powder + 35％OCW-1L (flushing agent) + 10％CEA-1 + 4％spacer agent.Field application has shown that this cement slurry had good stability and anti-channeling performance.When used in combination with assorted technical measures,the quality of the cementing job can be enhanced,and operation safety ensured.关键词
高压/高密度/防窜/抗污染/水泥浆/固井Key words
High pressure/High density/Anti-channeling/Contamination resistant/Cement slurry/Well cementing分类
能源科技引用本文复制引用
钟福海,费中明,高飞,孙万兴,覃毅,郑岩力..高密度防窜水泥浆在红北1井的应用[J].钻井液与完井液,2016,33(6):91-94,4.基金项目
中石油渤海钻探工程有限公司重大科研项目“高温高密度水泥浆体系及混配工艺研究”(2013ZD07K). （2013ZD07K）
