FIELD: oil, gas and coke-chemical industries.
SUBSTANCE: group of inventions relates to extraction of crude oil. Method for improving mobility of heavy crude oil in a porous subterranean formation includes introducing into a formation a liquid composition containing water, a surfactant and a co-solvent, and formation in formation of at least one of emulsion and dispersion, wherein emulsion or dispersion has water as outer phase and heavy crude oil as inner phase. Surfactant is a nonionic compound and contains 20–30 % methanol or 5–10 % 2-butoxyethanol. Surfactant in combination with the combined solvent has a hydrophilic-lipophilic balance of more than 10. Combined solvent contains glycol ether. In addition, the liquid composition contains an emulsifier, an anti-turbulent additive containing an ethoxylated surfactant, and a linker. Linker is a glycol, polyol, phenol or alcohol containing more than eight carbon atoms, or their combinations.
EFFECT: technical result is improved mobility of heavy crude oil in subterranean formation.
26 cl, 4 tbl
Title | Year | Author | Number |
---|---|---|---|
FOAM REMOVAL OF LIQUID WITH APPLICATION OF ETHER SULFONATES OF ALCOHOLS | 2016 |
|
RU2710269C2 |
METHOD OF CRUDE OIL EMULSION SEPARATION | 2008 |
|
RU2476254C2 |
EMULSIFIER FOR INVERT EMULSION TO INCREASE OIL RECOVERY OF FORMATIONS | 2019 |
|
RU2720857C1 |
TREATMENT FLUIDS, CONTAINING LOW EMULSIONIZING SURFACE-ACTIVE AGENTS, AND RELATED METHODS | 2014 |
|
RU2619965C2 |
AQUEOUS EMULSIONS CONTAINING COPOLYMERS OF ETHYLENE AND VINYL ACETATE, A METHOD FOR PRODUCTION THEREOF AND USE AS ADDITIVES TO CRUDE OIL AS GEL-PREVENTING | 2016 |
|
RU2741016C2 |
METHOD OF INCREASING LUBRICATING CAPACITY OF WELL FLUIDS | 2015 |
|
RU2721983C2 |
OIL FORMATION TREATMENT EMULSION | 2004 |
|
RU2254459C1 |
TREATMENT METHOD OF BOTTOM-HOLE OIL FORMATION ZONE | 2012 |
|
RU2501943C2 |
DEMULSIFYING COMPOSITION AND A METHOD OF ITS USE | 2017 |
|
RU2652712C1 |
EMULSION-STABILISING AGENTS TO BE USED IN FLUID MEDIA FOR DRILLING AND COMPLETION OF WELLS | 2010 |
|
RU2501829C2 |
Authors
Dates
2019-11-25—Published
2016-08-29—Filed