Method and apparatus for exploiting oilfields

Details Method and apparatus for exploiting oilfields Method and apparatus for exploiting oilfields

2006-06-13

2006-06-13

Bagnell, David (Department: 3672)

Wells

Processes

Specific pattern of plural wells

C166S268000, C166S050000, C166S052000

Reexamination Certificate

active

07059402

ABSTRACT:
A method and apparatus for exploiting oilfields involving the installation of a well network in the form of an open or non-open ring that is generally non-circular. Horizontal well sections (3) are drilled from vertical injection (1) or producing (2) wells that already exist, to interlink them. The vertical wells that are located in the same line are used as injection wells, thereby promoting oil sweeping in the reservoir (R) towards the ring-shaped producing wells (P1) or (P2). In another embodiment, vertical service wells are drilled for monitoring the characteristics of the reservoir (R). From these wells, horizontal wells are drilled in a ring-shaped form to obtain concentric well rings from the periphery to the central region of the reservoir (R). The outermost horizontal well is used as injection well and the innermost annular horizontal wells are used as producing wells.

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