交联型油基钻井液降滤失剂的合成及性能评价  

Synthesis and Evaluation of Novel Cross-Linked Fluid Loss Agent for Oil Base Drilling Fluid

作　　者：冯萍[1] 邱正松[1] 曹杰[1] 

机构地区：[1]中国石油大学(华东)石油工程学院

出　　处：《钻井液与完井液》2012年第1期9-11,14,共4页Drilling Fluid & Completion Fluid

基　　金：国家自然科学基金项目(41072094)

摘　　要：通过测试不同矿源腐植酸样品的特征常数E4/E6值,筛选出了腐植化程度高的腐植酸,然后采用不同碳链长度的脂肪胺结合适量的交联剂对该腐植酸进行亲油改性和适度交联,研制出了新型油基钻井液降滤失剂SDFL。红外光谱分析表明,新研制的SDFL中的一部分羧基被脂肪胺封闭;SDFL适用于白油基和合成基钻井液,能抗200℃高温,抗岩屑(24%岩屑)、盐水(20%CaCl2水溶液)污染能力强;与钻井液的配伍性好;可使油基钻井液滤失量降低85%以上,对油基钻井液的流变性影响小,降滤失性能优于中国产品,与国外同类产品水平基本相当。In this paper,a fluid loss agent SDFL for OBM is synthesized by amidation reaction of humic acid,which isoptimized by characteristic constants E4/E6,and aliphatic amine is used as the cross linking agent.The chemical structureof SDFL is confirmed by FTIR,which some carboxyl groups are displaced by aliphatic amine.The experimental resultsindicate that SDFL is suitable for white oil and synthesized oil base drilling fluid systems,which the performances are hightemperature resistance up to 200℃,anti-contamination with 24% cuttings and 20% CaCl2 solution,and decreasing HTHPfluid loss by more than 85%.Also the effect to rheology of OBM is slight and fluid loss control ability is not only better thandomestic products but equal to foreign products.

关 键 词：地层伤害 油基钻井液 降滤失剂 腐植酸 脂肪胺交联 高温高压滤失量 

分 类 号：TE254.4[石油与天然气工程—油气井工程]