第24卷第3期 2016年6月
材料科学与工艺
MATERIALS SCIENCE & TECHNOLOGY
doi:10.11951/j.issn.1005-0299.20160309
水基钻井液用碳酸钙微米颗粒的分散状况
陈辛未，黄进军，徐英，黎然，李春霞
（油气藏地质及开发工程国家重点实验室（西南石油大学），成都610500）
Vol. 24No.3 Jun.2016
摘要：为了研究水基钻并液用碳酸钙微米颗粒在水溶液中的分散状况，使用扫描电镜对碳酸钙微米颗粒的微观形貌分布与Zeta电位变化，又利用不同的分散剂对碳酸钙微米颗粒进行了化学分散.结果表明：长期放置的碳酸钙微米颗粒 000 4μm；超声作用则使碳酸钙微米颗粒粒径先减小后增大，中径最小可达2.6μm，pH小于10时，粒径随pH的增大而增大，大于10时则随pH的增大而减小；化学分散剂对提高碳酸钙微米颗粒的分散具有显著的作用，其中，无机类分散剂六
偏磷酸钠可使碳酸钙微米粒子中径达到1.5μm，并且Zeta电位绝对值显著提高关键词：水基钻井液；碳酸钙微米颗粒；粒径分布；分散稳定性；Zeta电位
中图分类号：TE24
文献标志码：A
文章编号：1005-0299（2016)03-0050-05
Aqueousdispersionofcalciumcarbonatemicroparticlesfor
water-based drilling fluids
CHEN Xinwei, HUANG Jinjun, XU Yin, LI Ran, LI Chunxia
( State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation( Southwest Petroleum University ) , Chengdu 610500, China) Abstract: To study water-based drilling fluids with calcium carbonate microparticles in aqueous dispersior conditions, the micro morphology of calcium carbonate microparticles was analyzed by scanning electron microscope (SEM). Then, the paper studied the particle size distribution of calcium carbonate microparticles in water solution and the variation of Zeta potential were studied based on researches on several physical dispersion factors, including different stirring rate, different pH, and different ultrasonic time. Finally, chemical decomposition for calcium carbonate microparticles with various dispersants were carried out Experimental results show that placement of microparticles calcium carbonate material for a long time will asaae the dispersion effects. When stirring speed is 10 000 r/min, the diameter can reach 3 ~4 μm. Ultrasound causes the particle size of calcium decreasing first and then increasing. The minimum medium diameter is 2.6 μm. When the value of pH is less than the number 1O, particle size increases with the increase of pH. When the value of pH is more than number 10, particle size decreases with the increasing of pH value. Chemical dispersants play an important role in improving the dispersion of calcium carbonate microparticles. The inorganic dispersant, sodium hexametaphosphate （SHMP） can make diameters of calcium carbonate nanoparticles reach 1.5 μm andincrease the absolute value of the Zeta potential remarkably.
Keywords : water-based drilling fluids ; calcium carbonate microparticles ; particle size distribution; dispersion stability; zeta potential
收稿日期：2015-12-31.
基金项目：国家科技重大专项项目（2011ZX05021-004)，
作者简介：陈辛未（1992一），男，硕士研究生. 通信作者：黄进军，E-mail；huangjswpu@163.com
随着钻井技术的进步，我国页岩气逐渐发展为一项具有商业开发价值的非常规能源，并且在四川等地已经实现商业化开发.由于页岩气储存