ON THE PETROLEUM PROSPECTS IN THE NORTHERN TIBET
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Abstract: It is suggested that there are certain prospects in the northern Tibet,and detailed studies should be carried on the Lunpola and Qiangtang basins in the region. The Lunpola Basin is a Cenozoic faulted basin, with the thickness of about 5000m Tertiary non-marine sediments, hundreds of meters of source rocks and a geothermal gradient of 4.6~6.6℃/100m. Up to date,31 anticlinal structure shave already been discovered, among which the largest trap can reach as much as 40.2km2. However,the Qiangtang Basin is a Mesozoic petroliferous basin with a total area of 19.5×10.4km2. The marine Mesozoic sedimentary sequences are of 14000m thick,of which the thickness of the Jurassic system is up to 7800m. In the source rocks, the organic carbon is about 0.17-2.14%,white its Ro ranges 1.12~0.65%,being attributed to type Ⅱ kerogen.
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