缓速酸

新型砂岩缓速酸的研制

Developing a New Retarded Acid for Sandstone Reservoir

缓速酸的岩心流动模拟实验研究

Study on core flow simulation test of retarded acid

其中主体酸为多元酸的混合物，在地层条件下可进行一级、二级电离（pka＜6）。室内试验表明：RA缓速酸体系具有较强的溶蚀能力和缓速性能，其腐蚀性低；

The indoor testing shows that retarded acid RA has good retardation , lower corrosion to steel , and good corrasion ability .

与常规土酸相比，H2SiF6、HBF4、有机缓速酸均有一定的延缓反应速度的作用，具有解除深部堵塞的功能；

Secondly , Compared with conventional mud acid , All of H_2SiF_6 、 HBF_4 and organic retardant can retard reaction velocity and remove in-depth plugging .

有机酸-土酸缓速酸体系在塔里木砂岩储层酸化中的应用

Application of retarded organic acid / mud acid in Tarim sandstone reservoir

砂岩缓速酸室内研究

The Study of Slow Acid Treatment on Arenaceous Rock

储层选用高温缓速酸配方。

Select high temperature retarder acid formula to reservoir .

缓速酸用缓蚀剂的研究

Study of New Corrosion Inhibitor for Retarded Acid

表明缓速酸对地层深部酸化效果较好。

It showed that these retarded acids had better effectiveness in deep acidifying of reservoirs .

高效螯合有机复合缓速酸解除岩心伤害的效果最好，盐酸和胶束酸略有效果，土酸有反效果；

To use strongly chelating combinational organic acidizing fluids to remove reservoir damage while hydrochloric and micellar acids are only slightly effective and negative effect obtained with mud acid ;

针对大庆外围东部中、低渗透油藏地层伤害问题严重，以往酸化效果不理想的问题，研究了新型有机缓速酸液及配套的施工工艺。

Aiming at the problem of formation injury of medium to low permeable reservoirs in eastern peripheral area in Daqing , where previous acidizing has not good effect , this paper studies a new type of organic retarded acid and adaptable operation technique .

通过室内研究，优选出一种高性能的缓速酸，该酸液具有溶蚀率高、缓速性能好、能有效防止铁离子二次沉淀、与地层水配伍性好等特点。

Aimed at these problems , a kind of high quality slow-reacting acid was selected that had distinguishing feature as : high solvent compatibility with formation , effective slow-reacting function , ability to prevent secondary precipitation of iron ion effectively and fine compatibility with formation water etc.

介绍了国内外自生酸、泡沫酸、稠化酸、乳化酸、化学缓速酸、胶凝酸和降滤失酸的发展现状，对其性能、作用机理以及使用范围和效果做了概述。

This paper introduces the developing actualities of self-generating acid , foamed acid , viscous acid , emulsified acid , retarded acid , gelling acid and leaking control acid at home and abroad , and summarizes the performance , action mechanism and application range and effect .

缓速酸在酸化处理过程中能减缓H+扩散速度，延缓酸岩反应，降低酸液滤失，增加酸液的有效作用距离，提高酸化效果。

The retarded acid can slow down the propagation rate of H + in the acidification treating processes , delay the sour crag to respond , reduce the acid liquor to filter loses , increase the useful effect distance of the acid liquor , enhance the effect of acidified .

文中主要介绍有机缓速土酸在轮南油田注水井重复酸化中的应用。

Application of organic retarded mud acid to reacidizing in injection wells in Lunnan Oilfield is described in this paper .

通过对注水井储层分析，注水井损害因素分析，岩心流动试验以及酸化现场实施效果分析，证明有机缓速土酸能够较好地解除轮南注水井堵塞，有效地提高注水能力。

Analysis of reservoir characteristics , damage mechanism , core flow experiments and treatment results indicate that organic retarded mud acid treatments can remove plugging problems in injection wells , improve injectivity .

介绍了一种用于砂岩酸化的缓速低伤害酸液体系&以磷酸/氢氟酸为主体的酸液体系，即A-924酸液；

A new acid fluid of H3PO4 / HF for acidization of sandstone is presented .