多年来,分散泥浆体系在墨西哥湾居支配地位。尽管这些木质素磺酸盐体系一般不能促进井眼的稳定性,使页岩水化减至最低程度,也不产生极好的井径测井,但是它们在宽广的泥浆密度范围内,具备合格的流变性能和滤失性能。重要的是不同于不分散聚合物泥浆,这些木质素磺酸盐体系能够经受严重的钻屑固相污染,这是墨西哥湾钻井环境中经常发生的。 For many years, dispersed mud systems dominates the Gulf of Mexico. Although these lignosulfonate systems generally do not promote wellbore stability, minimize shale hydration, and do not result in excellent caliper logging, they qualify over a broad range of mud densities The rheological properties and filtration performance. What is important is that unlike lube-free polymer slurries, these lignosulfonate systems are capable of withstanding severe cuttings solid-phase contamination, which is often the case in the Gulf of Mexico drilling environment.