第34卷第3期 2017年5月
钻井液与完井液
DRILLINGFLUID&COMPLETIONFLUID
doi:10.3969/j.issn.1001-5620.2017.03.012
Vol.34 No.3 May2017
钻井液用页岩防塌剂中磺化度测定方法的改进
刘卫丽，夏小春，王文利，易勇（中海油田服务股份有限公司油田化学研究院，河北燕郊065201）
刘卫丽，夏小春，王文利，等，钻并液用页岩防竭剂中磺化度测定方法的改进[].钻井液与完井液，2017，34（3)：64-67 LIU Weili, XIA Xiaochun, WANG Wenli, et al. Improve the test method of the degree of sulfonation of drilling fluid shale
inhibitors[J]. Drilling Fluid & Completion Fluid, 2017, 34 (3 ) : 64-67.
摘要磺化两青中磺酸钠基含量为衡量其质量好坏的重要指标，其含量越高，性能越好。采用离子色谱与元素分析仪相结合，建立了1种快捷地测定磺化沥青中磺酸钠基含量的方法。此方法测定每个样品结果的相对标准偏差(RSD)灼小于 1%(n=5)，表明该方法具有良好重复性。经实验表明，此方法筒单快速可靠，可便捷地应用于磺化沥青中磺酸钠基含量的测定。
关键词离子色谱；元素分析；磺酸钠基
中图分类号：TE254.1
文献标识码：A
文章编号：1001-5620（2017）03-0064-04
Improve the Test Method of theDegree of Sulfonation of Drilling Fluid Shale Inhibitors
LIU Weili, XIAXiaochun, WANG Wenli, YIYong
(OilfieldChemistryR&DInstituteCOSL,Yanjiao,Sanhe,Hebei065201)
Abstract Sulfonated asphaltene, an additive widely found in water base and oil base drlling fuids,is generally used to effectively plug the micro fractures, prevent sloughing shales from collapsing, and inhibit shale from becoming hydrated. It also has good lubricity, emulsifying capacity, and abilities to reduce filter loss and to stabilize mud properties at elevated temperatures, The content of sodium sulfonate in sulfonated asphaltene is an important index ofevaluating the quality of the sulfonated asphaltene; the higher the content ofthe sodium sulfonate, the better the quality ofthe sulfonated asphaltene. In laboratory studies, the ion chromatography and element analyzer were used together to establish a fast way of measuring the content of sodium sulfonate in sulfonated asphaltene, Using this method, the relative standard deviation (RSD) of the measuring result of each sample was less than 1% (n=5), indicating that this method had good repeatability. Experimental results demonstrated that this method is fast, reliable and easy to use in measuring the sodium sulfonate content in a sulfonated asphaltene
Key words Ion chromatography; Element analysis; Sodium sulfonate
磺化沥青主要成分是沥青磺酸钠盐，是由沥青在一定条件下经过磺化、中和及后处理等工艺程序制得。磺化沥青类处理剂降低钻井液高温高压滤失量的机理主要是利用沥青的软化点特性，即当温度达到沥青的软化点附近时，在高温高压下，沥青会变软变黏并与黏土颗粒相互作用，一起形成致密的泥饼而起到封堵的作用，阻止钻井液固相和液相侵人地层，达到护壁防塌及保护油气层的目的)。磺
化沥青的磺化程度，直接影响该处理剂的基本性能，是控制其质量的一个重要指标)。目前室内多采用 SY/T5665一1995《钻井液用页岩抑制剂改性沥青 FT341、FT342》标准测定样品中“磺酸钠基”含量，但其存在2点不足：①测定游离硫酸根时，磺酸基团是否能够被活性炭完全吸附；②在测定全硫时,不能排除其它不溶性残渣对结果的影响3。因此，需要1种准确可靠、快捷的磺化类处理剂磺化度测
（200200S0010）第一作者简介：刘卫丽，硕士，工程师，从事油田开发生产过程、油田化学剂及油、气、水等成品质量监测、分析、
控制工作。电话15343168569；E-mail：weixiaorensheng1984@126.com。万方数据