Wells – Processes – Electric current or electrical wave energy through earth for...
Patent
1981-08-20
1984-06-26
Novosad, Stephen J.?
Wells
Processes
Electric current or electrical wave energy through earth for...
166252, 166272, E21B 4324
Patent
active
044560656
ABSTRACT:
In a section of an oil field a first and only bore hole (5) is drilled through the strata (3) carrying heavy oil until the underlying stratum (4) void of heavy oil and enlarged to a cavern-like collection chamber (9). Around this first bore hole (5) a plurality of second bore holes (6) are drilled through the strata (3) carrying heavy oil to the stratum (4) in a pattern comprising several circles. A further pattern of third bore holes (7) is drilled also in a circle-like pattern through the strata (5) carrying heavy oil, which third bore holes (7) are followed by drainage channels (8), which extend to the collecting chamber (9). By means of electrodes arranged in the second bore holes (6) the heavy oil strata are preheated and thereafter steam is injected through the same bore holes (6) in order to drive flowable heavy oil against the third bore holes (7). A solvent is injected from the third bore holes (7) into the cone-like heavy oil accumulation (18) and by means of a further injection of steam from the second bore holes (6) the heavy oil rendered flowable by the solvent is driven toward the third bore holes (7) such to flow into the collecting chamber (9) out of which it is finally pumped to the first bore hole (6).
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Heim Werner
Savery Winsor T.
Wolf Fritz J.
Cohen Jerry
Elektra Energie A.G.
Neuder William P.
Novosad Stephen J.?
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