专利名称：Oil recovery method employing alternate slugs of surfactant fluid and fresh water 发明人：Issam S. Bousaid
西安温泉申请号：US06/071220
生育检查项目申请日：19790830
女神节高级文案公开号：US04230182A
公开日：
墨家代表人物
19801028
小学体操专利内容由知识产权出版社提供
摘要：Disclod is a petroleum recovery method uful for recovering petroleum from subterranean formations containing water having high salinity and/or divalent ion concentration, employing an aqueous surfactant-containing fluid which is designed to effect low surface tension displacement of petroleum in the formation in the prence of high salinity water. The improvement compris injecting the total desired volume of surfactant in the form of a plurality of relatively small slugs of surfactant fluid, and alternatingly injecting similarly small pore volume slugs of fluid comprising fresh water, e.g. salinities less than 10,000 parts per million and preferably less than 1000 parts per million total dissolved solids. The surfactant fluid compris water containing at least one surfactant and up to 5.0 volume percent hydrocarbon, said hydrocarbon optionally containing an oil soluble silicone compound dissolved therein. The total pore volume of surfactant- containing fluid injected is ordinarily from 0.01 to 1.00 and preferably from 0.20 to 0.50 pore volumes. This total amount of surfactant fluid is injected in from 2 to 15 and preferably from 3 to 6 parate discrete slugs. Each slug of surfactant fluid is followed by injecting a quantity of fresh water. The volume of each fresh water slug is ordinarily from 0. 5 to 5.0 and preferably 1 to 2 times the volume of the preceding
surfactant fluid slug.
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申请人：TEXACO INC.
代理人：C. G. Ries,Robert A. Kulason,Jack H. Park 更多信息请下载全文后查看黄发垂髫什么意思
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