Structural Study of Cretaceous Formations for Sufaiya Area Northwest Iraq

Abstract

The seismic surveys by the Iraqi petroleum Company in 1956 for the Sufaiya area showed the
existence of a geophysical phenomenon extending northwest-southeast, followed several seismic
surveys in that area which confirmed the presence of a geological structure in that area. Then,
other seismic surveys were carried out to clarify the structural side of the field includes the
survey of the Bulgarian Techno export Company 1977.
The exploration well Sufaiya -1 was drilled in 1973 and the drilling reached the depth 3504
meters from Rotary Table Kelly Bushing. The oil appeared in the Gir Bir, Mushorah and
Shiranish Formations, produced gas and condensate in the Karra Chine formation. In the light of
this promising information and information obtained from the seismic surveys and drilling wells
in the structure. The drilling wells continued in this structure until to reach the number of wells
in the Sfaiya area 47 wells, including 5 wells penetrating the Gir Bir reservoir completely, which
is Sfaiya - 1, 2, 4, 12 and 29.