Abstract A method for efficiently producing hydrocarbons such as petroleum and similar fluids from an underground reservoir having several separated and different hydrocarbon bearing formations or zones in stratified sequence is disclosed herein. The method comprises boring a generally vertical hole through the zones, placing casing in the wellbore, mounting one or more vertical communications tubes alongside the outside of the casing between the zones to be placed in communication, the tubes having vertically spaced perforating devices and extending between all the zones having similar producing characteristics. The casing and the communications tubes are cemented in place in the well hole, and then the communications tube and the adjacent zones are perforated by the perforating device adjacent the similarly characterized producing zones.
Inventors
👤 Charles E Cole
👤 Terry L Ramsey
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-01 18:34
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
30 words
The method of claim 1 which additionally comprises mounting more than one communications means in said wellbore and placing different sets of fluid hydrocarbon bearing zones in fluid communications means.
Claim 2
Dependent Claim
90 words
The method of claim 2 wherein each of said fluid communications means is a communications tube fixedly mounted on the outside of said casing, said communications tubes each have a plurality of internally mounted perforating devices located opposite said plurality of fluid hydrocarbon bearing zones and said step of placing said communications means and at least two of said plurality of fluid hydrocarbon bearing zones in fluid communication with each other comprises, perforating said communications tubes, the adjacent cement liner and said fluid hydrocarbon bearing zone with said perforating devices.
Claim 3
Dependent Claim
52 words
The method of claim 3 which additionally comprises drilling the wellbore from the surface through said multizonal reservoir, determining the producing characteristics of each of said plurality of fluid hydrocarbon bearing zones in said multizonal reservoir, and placing fluid hydrocarbon bearing zones having similar producing characteristics in fluid communication with each other.
Claim 4
Dependent Claim
47 words
The method of claim 4 which additionally comprises placing said cased wellbore in fluid communication with the surface by mounting a pipe internally in said wellbore between the surface and said cased wellbore adjacent one of said communications tubes, and placing said pipe in fluid communications tube.
Claim 5
Dependent Claim
43 words
The method of claim 4 which additionally comprises drilling a second well through said multizonal reservoir, sealing said second well from said fluid hydrocarbon bearing zones and selectively placing one of said fluid hydrocarbon bearing zones in fluid communication with said second well.
Claim 6
Dependent Claim
43 words
The method of claim 6 wherein said second well is a multizonal completion having a plurality of flow pipes coaxially mounted in said second well, said pipes being each placed in fluid communication with the surface and a different fluid hydrocarbon bearing zone.