超高密度水泥浆研制  

Research and preparation of ultra-heavy slurry

作　　者：周仕明[1,2] 李根生[1] 王其春[2] 

机构地区：[1]中国石油大学(北京) [2]中国石化石油工程技术研究院

出　　处：《石油勘探与开发》2013年第1期107-110,共4页Petroleum Exploration and Development

基　　金：国家科技重大专项"海相碳酸盐岩固井技术研究"(2008ZX05005-006-04)

摘　　要：为了解决贵州赤水地区官渡构造钻探中超高压气层或盐水层固井的技术难题,通过加重材料优选和颗粒设计研制超高密度水泥浆,并将其用于官深1井尾管固井。针对超高密度水泥浆配制需求,选择颗粒呈球形的加重剂MicroMAX并优选了加重剂组合(还原铁粉、铁矿粉、MicroMAX);基于紧密堆积理论设计了水泥颗粒粒度分布,实际粒度分布接近紧密堆积的理想状态。设计了密度为2.70～3.00 g/cm3的超高密度水泥浆,其基本性能、流动性和稳定性良好。在地面模拟混配试验中,采用常规一次固井流程配制了平均密度为2.71 g/cm3的水泥浆。在官深1井的尾管固井中,采用设计密度为2.80 g/cm3的水泥浆成功封隔超高压盐水层:水泥浆入井平均密度为2.78 g/cm3,最高密度为2.82g/cm3,声幅测井显示固井质量合格,后续作业钻井液密度由2.77 g/cm3降至2.00 g/cm3,井内稳定。In order to resolve the technical problem of cementing when drilling super high-pressure gas layers or saltwater layers of Guandu structure in Chishui region,Guizhou province,an ultra-heavy slurry was developed by optimizing weighting materials and designing particles,and applied to well Guanshen1 for liner cementing.According to the needs of preparing ultra-heavy slurry,the weighting additive MicroMAX in spherical particles was selected and combination of weight additives—reduced iron powder,iron powder,MicroMAX—was chosen for optimization.The particle size-distribution of the slurry was designed on the basis of the theory of tight packing,and the actual particle size-distribution is close to the ideal condition of tight packing.The ultra-heavy slurry with a density of 2.70-3.00 g/cm3 was designed,which is good in basic performance,flow ability and stability.In the simulated mixing test on the ground,a slurry with an average density of 2.71 g/cm3 was prepared by using conventional one-time cementing process.In the liner cementing of well Guanshen 1,the slurry with a density of 2.80 g/cm3 was used to successfully seal the super high-pressure saltwater layer:the average density of the slurry pumped into well was 2.78 g/cm3 and the maximum density was 2.82 g/cm3;amplitude log showed that the cementing quality was good;the well bore kept stable in follow-up drilling when the density of drilling fluid was reduced from 2.77 g/cm3 to 2.00 g/cm3.

关 键 词：超高密度 水泥浆 加重剂 颗粒设计 模拟混配试验 现场应用 

分 类 号：TE256.7[石油与天然气工程—油气井工程]