摘要
针对中国部分G级高抗硫油井水泥存在稠化时间短、与外加剂配伍性差、触变性强的问题,以BG厂生产的G级高抗硫油井水泥为例,从水泥原料、熟料化学成分及生产工艺角度出发,结合现场水泥质量检测和水泥浆性能实验,分析了水泥浆稠化性能不合格的原因。结果表明,原料中Mg O含量过高及化学成分不稳定造成熟料中Mg O及C3A含量过高(分别为4.51%、7.21%),水泥中碱含量及f-Ca O含量过高(为1.97%)、SO3含量过低(为0.42%),煅烧温度低、窑内物料填充率高及冷却不充分,均会导致水泥浆稠化时间过短;水泥熟料中C3A和C4AF含量过高会导致水泥浆与外加剂配伍性不良,导致水泥浆稠化性能异常。
Some cement slurries formulated with class G cement are studied for the improvement of their poor thickening performance. Clinkers made from raw materials containing high concentration of Mg O and unstable components have higher Mg O and C3A(4.51% and 7.21%, respectively), and the produced cements in turn have high alkaline and f-Ca O concentration(1.97%) and low SO3 concentration(0.42%). Calcination at low temperatures, denser packing of raw material in kiln with limited space, and inadequate cooling all lead to unduly short thickening time. Higher concentrations of C3 A and C4 AF in clinkers will result in poor compatibility of cement slurry with additives and abnormal thickening behavior of that cement slurry.
出处
《钻井液与完井液》
CAS
北大核心
2015年第5期49-53,104,共5页
Drilling Fluid & Completion Fluid
基金
江苏省高校优势学科建设工程资助项目
关键词
固井
油井水泥
稠化性能
熟料组成
煅烧工艺
Well cementing
Oil well cement
Thickening behavior
Composition of clinker
Calcinarion technique
