摘要
以丙烯酰胺(AM)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)、丙烯酸(AA)和二烯丙基二甲基氯化铵(DMDAAC)为聚合单体,过硫酸铵-亚硫酸氢钠为氧化还原引发体系,通过水溶液聚合得到一种新型抗盐、抗高温、强抑制钻井液降滤失剂SN-K。通过单因素实验确定了最佳单体配比n(AM)∶n(AMPS)∶n(AA)∶n(DMDAAC)=1∶2∶2∶1,反应温度65℃,反应时间4 h,w(单体)=20%(以水溶液的总质量计,下同),w(引发剂)=0.5%(以单体总质量为基准,下同)。采用KOH调节聚合体系pH,引入强抑制性离子K+,并对SN-K进行性能评价。结果表明:在盐水钻井液中,w(SN-K)=3.0%(以钻井液总质量为基准,下同)时,经180℃高温老化16 h后,SN-K仍具有良好的降滤失效果,FLAPI=8.4 m L,没有添加SN-K的钻井液基浆的FLAPI=82.0 m L;泥页岩滚动回收实验表明:当w(SN-K)=1.0%时,岩屑相对岩心回收率(R*)为94.4%,远远超过KCl体系中w(KCl)=3.0%时的77.3%;利用SEM对添加SN-K的钻井液高温高压滤饼进行了微观表征,结果显示其具有致密的网架结构。
A new kind of fluid loss additive SN-K for drilling fluid with salt resistance,high temperature resistance and strong inhibition was prepared by aqueous solution polymerization,with acrylamide（AM）,2-acrylamide-2-methylpropanesulfonic acid（AMPS）,acrylic acid（AA） and diallyl dimethyl ammonium chloride（DMDAAC） as monomers in the presence of the initiator system of（NH_4）_2S_2O_8and NaHSO_3. The optimal reaction conditions were obtained by single factor experimental method as follows：n（AM） ∶ n（AMPS） ∶ n（AA） ∶ n（DMDAAC） = 1 ∶2 ∶2 ∶1,reaction temperature 65 ℃,reaction time 4 h,mass fraction of monomers was 20%（based on mass of aqueous solution,below）,and w（initiator） = 0. 5%（based on mass of monomers,below）. Subsequently,KOH solution was used to adjust the pH value of reaction system,at the same time,the strong inhibition ion K＋was also introduced,It was found that when 3. 0% SN-K（mass fraction,based on total mass of drilling fluid,below） was added into the brine based mud,the drilling fluid had a good filtrate performance after the aging treatment at 180 ℃ for 16 h,and the filtration loss（FLAPI） was 8. 4 m L,but FLAPIof the brine based mud was 82. 0 m L. Furthermore,the scroll shale recovery experiment showed that cuttings recovery of the SN-K system was higher than that of the KCl system,When w（SN-K） = 1. 0%,R＊was 94. 4%,but When w（KCl） = 3. 0%,R ＊ was only 77. 3%. Additionally,the micro structure of high temperature and high pressure filter cake was characterized by SEM. And the results showed thatthe filter cake had a dense grid structure.
作者
郑勇
孙立君
彭志刚
许夏斌
霍锦华
王吉星
ZHENG Yong SUN Li-jun PENG Zhi-gang XU Xia-bin HUO Jin-hua WANG Ji-xing(College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, Siehuan, China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2017年第2期220-226,共7页
Fine Chemicals
关键词
降滤失剂
强抑制性
抗盐
抗高温
性能评价
油田化学品与油品添加剂
fluid loss additive
strong inhibition
salt resistance
high temperature resistance
performance evaluation
oil-field chemicals and petroleum additives
