甘青藏含油气区构造区划与含油气远景评价

Structural Division in Gansu-Qinghai-Tibet Petroliferous Sub-Province and Evaluation of Oil-Gas Potentials

甘青藏含油气区面积约269.5×10~4km^2,是我国面积最大的一个含油气区。在9个沉降带中分布着32个含油气盆地,总面积达159×10~4km^2。它们都是长期发展的叠合型含油气盆地,叠合着中-上元古界、古生界、中生界和新生界多套海相、海陆交互相和陆相含油建造,并具备了多期非生物油气源的地质-构造条件。因本区自然地理条件非常恶劣,新构造运动十分强烈,以致目前其勘探程度很低,勘探效果也不理想。从四个方面对其含油气性进行了评价,旨在引起同志们的争论和思考,以利于本区油气勘探事业的发展。

Gansu-Qinghai-Tibet petroliferous region is the largest sub-province of China with an area of about 269.5×10^4 km^2. In its nine subsiding belts, there are 32 petroliferous basins with an area of 159×10^4 km^2 in total. They are basins with tong-term devolution and superimposed by petroliferous multi-formations of marine, continental-oceanic and continental facies of Mid-Upper Proterozoic, Paleozoic, Mesozoic and Cenozoic, shaping the geologic-structural conditions of multistage non-biologic sources. Since the natural geographic conditions in this region are abnormal atrocious, the neo-tectonic movement is very active, its petroleum exploratory extent is still tow and the effects for prospecting are unsatisfactory nowadays. This paper highlights the evaluation of hydrocarbon-bearing property from several aspects aiming at getting instructive dispute and thinking at home for further development of petroleum exploration cause in this region.