三种压裂液稠化剂含量测定及吸附性能研究

Adsorption Capacity of Three Kinds of Thickener for Fracturing Fluids

尹子辰 王彦玲 汪庐山 吕永利 王 坤 任金恒 张 悦

YIN Zichen WANG Yanling WANG Lushan Lü Yongli WANG Kun REN Jinheng ZHANG Yue

为了获得不同压裂液稠化剂在地层的吸附特性， 分析了油田常用的胍胶、 合成乳液聚合物、 表面活性剂三种压裂液稠化剂的含量并对其吸附性能进行了研究。分别用蒽酮-硫酸比色法、 淀粉-碘化镉法和雷氏盐比色法建立了三种压裂液稠化剂的标准曲线， 通过测定三种压裂液稠化剂在石英砂上的吸附量， 定量说明了其在地层的吸附特性。结果表明： 三种压裂液稠化剂的标准曲线线性关系良好， R2>0.99； 三种压裂液稠化剂在石英砂上的吸附量的大小顺序为胍胶>表面活性剂>合成乳液聚合物， 每克石英砂上的吸附量分别为 8.5、 7.1和 2.0 mg/g。与传统的胍胶压裂液相比， 合成乳液聚合物和表面活性剂能有效减少压裂液在地层中的吸附， 从而减少对地层的伤害。图 3表1参 18

In order to obtain the adsorption of different fracturing fluid thichener in formation，the content determination and adsorption capacity of three kinds of fracturing fluids thickeners（guar gum，synthetic emulsion polymer and surfactant）which were often used in oilfield were studied. The standard curve of guar gum，synthetic emulsion polymer and surfactant in fracturing fluid was established by anthrone-sulfuric acid colorimetry，starch-cadmium iodide method and reinecke salt colorimetry， respectively. The adsorption properties of three kinds of fracturing fluids thickeners in reservoir were quantitatively demonstrated by measuring the adsorption capacity of thickeners on quartz sand. The results showed that the standard curve of three kinds of fracturing fluids thickeners indicated a good linear relationship with R2>0.99. Three fracturing fluids thickeners were arranged according to their adsorption capacity on quartz sand in following order: guar gum>surfactant>synthetic emulsion polymer. Their adsorption capacity on quartz sand was 8.5，7.1 and 2.0 mg/g，respectively. Compared with traditional guar gum，synthetic emulsion polymer and surfactant could effectively reduce the adsorption of fracturing fluid in reservoir，thus reduce the formation damage.

10.19346./j.cnki.1000-4092.2017.03.032