交联羧甲基淀粉降滤失剂的制备与性能评价

Preparation and Performance Evaluation of Cross-linked Carboxymethyl Starch Filtrate Reducer

魏君 于洪江 贺建飞 拓丹

WEI Jun，YU Hongjiang，HE Jianfei，TA Dan

为获得耐温性能优良的淀粉降滤失剂，以玉米淀粉为原料、氯乙酸为羧甲基化试剂、环氧氯丙烷为交联剂，制得复合变性淀粉降滤失剂CCMS。通过红外光谱对CCMS的结构进行了表征，研究了CCMS的降滤失性能和耐温耐盐性。结果表明，CCMS的降滤失性能良好。随CCMS加量的增大，基浆的API 滤失量降低；随基浆盐加量增大，基浆的API 滤失量增加，当CCMS加量为1.5%时，淡水基浆、4%盐水基浆和饱和盐水基浆的API 滤失量分别为6.8、7.8 和8.6 mL。CCMS可抗160℃高温。在含40% CaCl2的淡水基浆中，CCMS仍具有较好的降滤失作用，基浆的API滤失量为9.1 mL。CCMS能明显提高PLUS/KCl钻井液的抗温能力和高温高压降滤失性能，与国外同类产品的性能接近。图1表6 参11

In order to obtain starch filtrate reducer with good temperature resistance，a composite modified starch filtrate reducer（CCMS）was prepared by using corn starch as raw material，chloroacetic acid as carboxymethylation agent and epichlorohydrin as cross-linking agent. The structure of CCMS was characterized by infrared spectrometry，and the filtration reduction property，temperature resistance and salt tolerance of CCMS were studied. The results showed that CCMS had excellent filtration reduction property. The API filtration loss of base slurry decreased with increasing concentration of CCMS，and that increased with increasing salt dosage in base slurry. When the dosage of CCMS was 1.5%，the API filtration loss of freshwater-base slurry，4% salt water base slurry and saturated brine base slurry was 6.8，7.8 and 8.6 mL respectively. CCMS had good temperature resistance at 160℃. In freshwater-base slurry containing 40% CaCl2，CCMS still had good filtration reduction property，and the API filtration loss of base slurry was 9.1 mL. CCMS could obviously increase the temperature resistance as well as high-temperature and high-pressure filtration reduction property of PLUS/KCl drilling fluid，which had similar characteristics with the same products abroad.

10.19346/j.cnki.1000-4092.2018.01.003