Wells – Processes – Distinct – separate injection and producing wells
Patent
1979-08-30
1981-06-09
Leppink, James A.
Wells
Processes
Distinct, separate injection and producing wells
166274, E21B 4322
Patent
active
042719062
ABSTRACT:
Disclosed is a petroleum recovery method useful 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 presence of high salinity water. The improvement comprises 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, and having dissolved or dispersed therein an effective amount of a sacrificial agent such as a water soluble lignosulfonate salt. 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 separate discrete slugs. Each slug of surfactant fluid is followed by injecting a quantity of fresh water containing the sacrificial agent. The volume of each fresh water sacrificial agent slug is ordinarily from 0.5 to 5.0 and preferably 1 to 2 times the volume of the preceding surfactant fluid slug.
REFERENCES:
patent: 3346047 (1967-10-01), Townsend et al.
patent: 3421582 (1969-01-01), Fallgatter
patent: 3437141 (1969-04-01), Brandner et al.
patent: 3500920 (1970-03-01), Raifsnider
patent: 3500922 (1970-03-01), O'Brien et al.
patent: 3612182 (1971-10-01), Raifsnider
patent: 4043396 (1977-08-01), Kudchadker et al.
patent: 4133385 (1979-01-01), Kalfoglou
patent: 4157115 (1979-06-01), Kalfoglou
patent: 4172498 (1979-10-01), Kalfoglou
Bousaid Issam S.
Ho Benny K-C
Kulason Robert A.
Leppink James A.
Park Jack H.
Ries Carl G.
Suchfield George A.
LandOfFree
Oil recovery method employing alternate slugs of surfactant and does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Oil recovery method employing alternate slugs of surfactant and , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oil recovery method employing alternate slugs of surfactant and will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1258916