HA一体化砂岩酸化酸液体系的研制及其性能评价

发布时间：2018-11-27 08:09

【摘要】：常规的砂岩酸化工艺需要多个段塞注入前置液、处理液、后置液等,给生产作业带来了不便和困扰。为此,基于"一步"代"多步"的一体酸概念和高效、集约化的理念,研制了一种主要由有机多元酸(HA)+HCl+HF+高效有机溶剂构成的HA一体化酸液体系,可实现对砂岩储层复杂堵塞的有效解堵。对其缓速性能、有机堵塞物溶解、螯合性能和抑制沉淀性能等的实验评价结果表明:(1)新型HA一体化酸不仅可以达到常规一体化酸"一步"代替"多步"酸化的功效而且还具有良好的缓速性能,可通过控制H+的多级分步电离和在黏土矿物上形成硅酸—膦酸铝膜达到缓速的目的 ;(2)对有机物堵塞物解除效率高;(3)HA一体化酸体系相比常规的APCS(氨基聚羧酸类)螯合剂具有更宽的p H值溶解范围,对Ca~(2+)、Mg~(2+)、Fe~(3+)的螯合能力比常规螯合剂(EDTA、NTA、DTPA等)更强,抑制金属氟化物、氟硅酸碱金属和氟铝酸碱金属、氢氧化物沉淀比多氢酸、氟硼酸、土酸效果更优异。该研究成果为高温深层油气藏的解堵提供了技术支撑。
[Abstract]:The conventional sandstone acidizing process requires multiple slugs to be injected into the pre-liquid, treatment liquid, post-liquid, etc., which brings inconvenience and trouble to the production operation. In this paper, based on the concept of "one-step" and "multi-step", a HA integrated acid system composed mainly of organic polybasic acid (HA) HCl HF) and high efficient organic solvent was developed. The effective plugging removal of sandstone reservoir can be realized. For its slow-speed performance, organic clogging dissolved, The results of chelating and precipitation inhibition experiments show that: (1) the new HA integrated acid can not only achieve the function of "one step" instead of "multi-step" acidification, but also have good retarding performance. By controlling the multistage ionization of H and the formation of aluminum silicate-phosphonate film on clay minerals, the aim of slow speed can be achieved. (2) the removal efficiency of organic blockage is high; (3) compared with the conventional APCS (amino polycarboxylic acid) chelators, the HA system has a wider range of pH values, and the chelating ability of Ca~ (2), Mg~ (2), Fe~ (3) is stronger than that of the conventional chelating agents (EDTA,NTA,DTPA, etc.) The effect of inhibiting metal fluoride, fluorosilicate alkali metal and fluoroaluminate base metal, hydroxide precipitation is better than polyhydrogen acid, fluoroboric acid and earth acid. The research results provide technical support for plugging removal in high temperature deep reservoirs.
【作者单位】：西南石油大学"油气藏地质及开发工程"国家重点实验室;中海石油(中国)有限公司天津分公司;中国石油长庆油田公司第五采气厂;
【基金】：国家科技重大专项“大型油气田及煤层气开发”(编号:2016ZX05058-003)
【分类号】：TE377

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