Well stimulation

• US 3,301,328 A
• Filed: 11/01/1963
• Issued: 01/31/1967
• Est. Priority Date: 11/01/1963
• Status: Expired due to Term

• Current Assignee: Francis E. Campion
• Original Assignee: Francis E. Campion
• Inventors: Campion, Francis E.
• Application Number:
  US04/320,929
• Time in Patent Office: 1,187 Days
• US Class Current: 166/305.1
• CPC Class Codes: C09K 8/584 characterised by the use of specific surfactants
• CPC Class Codes: Y10S 507/936 Flooding the formation

Claims

1. A METHOD FOR TREATING A SUBTERRANEAN OIL-BEARING FORMATION SURROUNDING A WELLBORE WHICH COMPRISES INJECTING INTO SAID FORMATION THROUGH SAID WELLBORE A SOLVENT CONTAINING FROM ABOUT 0.01 TO ABOUT 5 PERCENT BY VOLUME OF A MIXTURE OF FROM ABOUT 50 TO 70 PERCENT BY VOLUME OF AN ALKALI METAL SALT OF A DIESTER OF SULFOSUCCINIC ACID HAVING C8 ALIPHATIC ESTER GROUPS, FROM ABOUT 20 TO ABOUT 40 PERCENT BY VOLUME OF AN ALKALI METAL SALT OF A DIESTER OF SULFOSUCCINIC ACID HAVING C6 ALIPHATIC ESTER GROUPS, AND FROM ABOUT 5 TO ABOUT 20 PERCENT BY VOLUME OF A LONG CHAIN SUBSTITUTED POLYETHYLENEOXYETHANOL HAVING THE FORMULA R(C6H4)YO(CH2CH2O)ZCH2CH2OH, WHERE R IS AN ALIPHATIC GROUP CONTAINING X CARBON ATOMS, X IS AN INTEGER FROM 7 TO 21, Y IS 0 OR 1, Z IS AN INTEGER FROM 6 TO 28, AND 0.475X-0.33(Z+1)=0.4 TO 1.4.