Oil recovery process
First Claim
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1. A PROCESS FOR PRODUCING A PETROLEUM OIL FROM AN OIL-BEARING VUGGY LIMESTONE ROCK RESERVIOR TRAVERSED BY AN INJECTION WELL AND A PRODUCING WELL WHICH COMPRISES INJECTING INTO SAID RESERVOIR THROUGH SAID INJECTION WELL 500 TO 3500 S.C.F. OF CO2 PER BARREL OF SAID OIL IN PLACE, TO PROVIDE AN ELEVATED PRESSURE NOT LESS THAN ABOUT 700 P.S.I. IN SAID RESERVOIR, THROUGH SAID INJECTION WELL;
- MAIN TAINING THE RESERVOIR AT THE ELEVATED PRESSURE;
INJECTING AN AQUEOUS DRIVE FLUID INTO SAID RESERVOIR THROUGH SAID INJECTION WELL AT SAID ELEVATED PRESSURE UNTIL BREAKTHROUGH OF SAID DRIVE FLUID OCCOURS AT SAID PRODUCING WELL;
AND THEN SHUTTING IN SAID INJECTION WELL AND PRODUCING PETRO-
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1 Claim
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1. A PROCESS FOR PRODUCING A PETROLEUM OIL FROM AN OIL-BEARING VUGGY LIMESTONE ROCK RESERVIOR TRAVERSED BY AN INJECTION WELL AND A PRODUCING WELL WHICH COMPRISES INJECTING INTO SAID RESERVOIR THROUGH SAID INJECTION WELL 500 TO 3500 S.C.F. OF CO2 PER BARREL OF SAID OIL IN PLACE, TO PROVIDE AN ELEVATED PRESSURE NOT LESS THAN ABOUT 700 P.S.I. IN SAID RESERVOIR, THROUGH SAID INJECTION WELL;
- MAIN TAINING THE RESERVOIR AT THE ELEVATED PRESSURE;
INJECTING AN AQUEOUS DRIVE FLUID INTO SAID RESERVOIR THROUGH SAID INJECTION WELL AT SAID ELEVATED PRESSURE UNTIL BREAKTHROUGH OF SAID DRIVE FLUID OCCOURS AT SAID PRODUCING WELL;
AND THEN SHUTTING IN SAID INJECTION WELL AND PRODUCING PETRO-
- MAIN TAINING THE RESERVOIR AT THE ELEVATED PRESSURE;
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Current AssigneeLe Roy W. Holm
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Original AssigneeLe Roy W. Holm
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InventorsHOLM LE ROY W
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Application NumberUS03/698,217Time in Patent Office1,831 DaysField of SearchUS Class Current166/402CPC Class CodesE21B 43/164 Injecting CO2 or carbonated...
