河西走廊油气勘探的新领域

河西走廊酒泉—民乐山前坳陷带位于祁连山北麓。西起玉门、东止民乐,东西长420余公里,南北宽30—60公里,属中新生代山前坳陷带。基岩隆起分隔为三个沉积盆地,自西而东为酒西、酒东、民乐,它们的面积分别为2700、8600、7800平方公里(图1)。 

NEW ASPECTS OF OIL AND GAS EXPLORATION IN HEXI CORRIDOR

Jiuquan-Minle foredeep zone, covering an area of 19,0000 km2, and with a thickness of sedimentary sequences up to 7,000 m or more, consists of three sedimentary basins,i.e. Jiuxi,Jiudong,and Minle basins. Large reserves of oil and gas have been found already in Jiuxi basin. Based on the data obtained recently and the experiences derived from expiorating practice in Jiuxi basin, three types of oil-bearing combination and five aspects of oil exploration are determined for the Jiuquan-Minle foredecp zone. Reserves initially in place of Jiuxi basin has been proved to be 160,000 ton per cubic kilometer of source rock. The relative high potential confirms tbat further prospecting of this region should be considered.