ムバラス油田の構造成長と石油の移動時期

抄録

The lower Cretaceous porous units of reservoir horizon in the Mubarras oil field and it's surrounding have fairly good continuity but oil bearing reservoirs were found only in the restricted structures. These phenomena are attributed to timely concurrence of structural growth of oil reservoirs and oil migration into the structures. The structural growth of the main oil rese-rvoirs were studied by reconstructing the paleostructural maps of several stages through computer. The relations between the structural growth and present oil distribution in the reservoirs show that Thamama oil was entrapped in the reservoirs during the Campanian-Maestrichitian movement, namely, the peak of structural growth in the geologic ages. The depths and temperatures of the reservoirs at that time (age) were estimated at approximately 4, 000 feet and 60°F respectively. These conditions were recognized in some other fields and are applicable for exploration of new oil fields.