HPG压裂液水不溶物和残渣来源分析  

Analysis on the Origin of Residue and Water Insoluble Substances for HPG Fracturing Fluid

作　　者：庄照锋[1,2] 赵贤[3] 李荆[3] 赵仁清[3] 杨超[3] 

机构地区：[1]中国石化石油勘探开发研究院,北京海淀100083 [2]中国石油大学(北京),北京昌平102249 [3]中原石油勘探局井下特种作业处,河南濮阳457164

出　　处：《油田化学》2009年第2期139-141,共3页Oilfield Chemistry

摘　　要：根据单一或混合液静置沉淀量,求得配制1L携砂量500kg/m3的HPG/硼砂压裂液所用材料和添加剂的水不溶物,最高值为来自陶粒表面的灰尘(1.249g),其次来自HPG(0.466g),少量来自NaOH、KCl和硼砂。根据中原油田多年检测资料,6种植物胶水不溶物为7.6%～26.3%,压裂液残渣为4.2%～15.9%,二者之间有良好线性关系,残渣为水不溶物的62%。采用专门设计的实验方法研究含HPG、有机硼及各种添加剂、过硫酸铵的体系,结果如下:压裂液残渣为HPG水不溶物的74.8%,水不溶物增加则残渣增加,且破胶程度降低;破胶加量增大则残渣减少,但使用高剂量破胶剂是否能减轻地层伤害尚待研究;一部分HPG水不溶物可部分转化为水溶物或悬浮于水中;一部分残渣并不来自水不溶物。The water insoluble substances（WISSs） in hydrofracturing fluid materials and additives for preparing one liter HPG/borate fluid carrying proppant in amount of 500 g/L were measured by determining precipitates from single or mixed solution or dispersion and it was shown that the highest value, 1. 249 g, came from haydite as dirt and dust,followed by 0. 466 g from HPG and very little amounts were given by NaOH, KCl, and borate. A statistics of monitoring data compiled in Zhongyuan oil fields showed that the WISSs in 6 plant gum thickeners ,modified and unmodified,was in range 7.6--26.3% and the residue in broken fracturing fluids（BFFs） was in range 4.2--15.9% and a good linear relationship existed between WISSs and R with R being of 62% of WISSs. In an investigation on a system composed of HPG, organic bor crosslinker, various additives, and ammonium persulfate by using a specially designed experimental procedure,following results were obtained：R in BFF is of 74. 8% of WISSs in HPG; R increased and the degree of gel breakdown decreased with increasing WISSs;R decreased with increasing gel breaker dosage and, however, whether the BFF induced formation damage abated or not at a high gel breaker dosage was still a question to be answered;WISSs in HPG might partly become water soluble or suspensible;not all R in BFF originated from the WISSs in the plant gum used.

关 键 词：冻胶压裂液 破胶液 残渣 植物胶 水不溶物 来源 相互关系 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程] TE39