Wells – Processes – Distinct – separate injection and producing wells
Patent
1997-03-13
1999-09-28
Neuder, William
Wells
Processes
Distinct, separate injection and producing wells
1662727, E21B 4324
Patent
active
059572027
ABSTRACT:
Techniques are disclosed for the safe production of shallow heavy oil sands which substantially reduce the probability of surface steam breakthrough. A pattern of injection wells and producing wells are drilled through the overburden into a relatively shallow heavy oil producing zone. Firstly the injection wells and the producing wells are cold produced for a combination of heavy oil and sand by use of a progressive cavity pump or the like. Then steam push-pull is used on both the injectors and producers until heavy oil production becomes uneconomical. Finally, low pressure steam is continuously injected into the injection well and heavy oil continuously produced from the producing wells.
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patent: 5246071 (1993-09-01), Chu
patent: 5305829 (1994-04-01), Kumar
patent: 5318124 (1994-06-01), Ong et al.
patent: 5320170 (1994-06-01), Huang et al.
Beard William J.
Gibson Henry H.
Neuder William
Texaco Inc.
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