Method for improving production of viscous crude oil
US4757833A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 8, 1987 |
| Grant date | Jul 19, 1988 |
| Priority date | — |
| Expiry date | May 8, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0391
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for improving the mobility and pipeline transport of a viscous crude oil by forming an oil-in-water emulsion with said oil and from 10 to 80% by weight of water in the presence of 100 to 1500 parts by weight of a surfactant blend per million parts by weight of said emulsion, said blend comprising from 15 to 85 parts by weight of an anionic or amphoteric surfactant (A) selected from those of the formulae Ar(OCH.sub.2 CH.sub.2).sub.n OSO.sub.3 H, ##STR1## a sodium and ammonium salt thereof, and from 85 to 15 parts by weight of a nonionic surfactant selected from (B) of the formula Ar(OCH.sub.2 CH.sub.2).sub.p OH or (C) of the formula ##STR2## the latter having an HLB value of from 10 to 20; where Ar is octylphenyl or nonylphenyl, PA1 n is 2 to 10, PA1 p is 10 to 100, PA1 a is 10 to 40, b is 15 to 55, c is 10 to 40, PA1 R.sup.1 is C.sub.8 to C.sub.18 alkyl and PA1 R.sup.2 is C.sub.12 to C.sub.18 alkyl; and said emulsion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.