钻井液用微粉化表面改性重晶石实验研究  

Experimental study on micronized and surface modified barite for drilling fluid

作　　者：王帝 邱正松[1] 苗海龙 耿铁[2] 钟汉毅[1] 赵欣[1] 范立君[3] WANG Di;QIU Zheng-song;MIAO Hai-long;GENG Tie;ZHONG Han-yi;ZHAO Xin;FAN Li-jun(School of Petroleum Engineering,China University of Petroleum(East China),Qingdao 266580,China;Oilfield Chemistry Research Institute of CNOOC Oilfield Services Co.,Ltd.,Sanhe 065200,China;The South China Sea-Magcobar Mud Corporation Ltd.,Shenzhen 518000,China)

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580 [2]中海油田服务股份有限公司油田化学研究院,河北三河065200 [3]中国南海-麦克巴泥浆有限公司,广东深圳518000

出　　处：《应用化工》2022年第11期3147-3150,3156,共5页Applied Chemical Industry

基　　金：国家自然科学基金项目(51974354,52174013);国家重点研发计划(2019YFA0708303)。

摘　　要：采用球磨机对重晶石粉进行表面改性,通过机械力化学法研制了微粉化表面改性重晶石。采用扫描电镜、红外光谱、X射线衍射等方法,对改性产物进行结构表征。实验评价了微粉化表面改性重晶石对高温高密度钻井液性能的影响。结果表明,微粉化表面改性重晶石的抗温性良好,可达260℃,可显著改善钻井液流变性能,降黏效率为45%,并且微粉化表面改性重晶石在改善加重钻井液流变性的同时,可以兼顾优化滤失性与沉降稳定性。另外,微粉化表面改性重晶石与普通重晶石进行复配使用,也可在一定程度上改善高密度钻井液的综合性能。Barite was modified by ball mill,and micro powdered surface modified barite was developed by mechanochemical method.The structure of the product was characterized by scanning electron microscope,infrared spectroscopy and X-ray diffraction.The effect of micronized surface modified barite on high temperature and high density drilling fluid was evaluated.The results show that the micro powdered surface modified barite has good temperature resistance,up to 260℃,which can significantly improve the rheological properties of drilling fluid,and the viscosity reduction efficiency is 45%.The micro powdered surface modified barite can improve the fluidity of weighted drilling fluid and optimize the filtration and settling stability at the same time.At the same time,the experimental results show that the combination of micronized surface modified barite and ordinary barite can also improve the comprehensive performance of high-density drilling fluid to a certain extent.

关 键 词：高密度钻井液 机械力化学改性 重晶石加重剂 流变性 滤失性 沉降稳定性 

分 类 号：TQ423[化学工程]