METHOD FOR DEVELOPMENT OF HETEROGENEOUS MULTILAYER OIL FIELD Russian patent published in 1994 - IPC

FIELD: development of oil fields. SUBSTANCE: first, oil field is drilled with vertical wells by employing wide well spacing pattern. Then, producing wells are drilled for each layer with horizontal well bores. Beginning and end of horizontal wellbore are located at the same distance from the source of displacing agent. Wellbore length of the producing well in producing level is established proportional to oil reserves and inversely proportional to their productivity. Length of well bore in horizontal producing wells in coupling rows is set not in excess of 70% of distance to well pattern. EFFECT: higher efficiency. 2 dwg