公开(公告)号：US4513818A

公开(公告)日：1985-04-30

申请号：US477955

申请日：1983-03-23

申请人： Donald E. Michels

发明人： Donald E. Michels

IPC分类号： C09K8/528 ,  E21B41/02

CPC分类号： C09K8/528 ,  E21B41/02 ,  Y10S166/902

摘要： A method for reducing deposition of scale in geothermal wellbores and geothermal flash steam plants is described. Naturally occurring brines containing different amounts of dissolved solids and having contrasting chemical behavior are blended in controlled proportions to obtain improved properties in the mixture insofar as deposition of scale is concerned. The invention improves the usability of hypersaline brines, containing substantial quantities of sodium chloride, for power generation by blending them with cooler more dilute brines containing dissolved bicarbonate. By mixing the two brines within calculable limits of their proportions in the total produced fluid, deposition of sodium chloride and carbonate scales is avoided in the wellbore and in the downstream power generation equipment.

摘要翻译： 描述了一种减少地热井筒和地热闪蒸蒸汽厂中沉积物沉积的方法。 将含有不同量的溶解固体并且具有对比的化学性质的天然存在的盐水以受控的比例混合，以获得关于结垢沉积的改进的混合物的性能。 本发明通过将含有大量氯化钠的过量盐水与更冷的含有溶解的碳酸氢盐的更稀的盐水混合来提高其发电的可用性。 通过将两种盐水在可计算的比例范围内混合在总产出的流体中，在井筒和下游发电设备中避免了氯化钠和碳酸盐垢的沉积。

公开(公告)号：US4437995A

公开(公告)日：1984-03-20

申请号：US477954

申请日：1983-03-23

申请人： Robert W. Rex

发明人： Robert W. Rex

IPC分类号： C02F1/52 ,  C02F1/60

CPC分类号： C02F1/5236 ,  C02F1/60

摘要： A method for the treatment of geothermal brines to control the precipitation of silica is disclosed. A sulfate-rich liquid is introduced into geothermal brine within a production well prior to flashing or is introduced into the residual geothermal brine remaining after the brine has been flashed to produce steam. The sulfate in the liquid reacts with the barium, calcium, and/or lead salts within the brine to produce a colloidal suspension which serves to accelerate precipitation of silica from the brine and to adsorb the precipitated silica particles. The colloidal suspension with its adsorbed silica particles is then removed from the brine by conventional gravimetric or filtration methods.The method of the invention substantially reduces the deposition of silica in wellbores and in energy extraction equipment and facilitates removal of the silica from the brine. The method further reduces the deposition of silica in injection wells wherein the silica cleansed brine is discharged.

摘要翻译： 公开了一种处理地热盐水以控制二氧化硅沉淀的方法。 在闪蒸之前将富含硫酸盐的液体引入生产井内的地热盐水中，或者将其引入残余的盐水已经闪蒸以产生蒸汽后残留的地热卤水中。 液体中的硫酸盐与盐水中的钡盐，钙盐和/或铅盐反应产生胶体悬浮液，其用于加速二氧化硅从盐水中沉淀并吸附沉淀的二氧化硅颗粒。 然后通过常规的重量法或过滤方法从盐水中除去其吸附的二氧化硅颗粒的胶态悬浮液。 本发明的方法基本上减少了二氧化硅在井筒和能量提取设备中的沉积，并有利于从盐水中除去二氧化硅。 该方法进一步减少二氧化硅在其中二氧化硅清洁的盐水被排出的注入井中的沉积。