塔里木盆地库车坳陷中生界烃源岩有机质成熟度

对库车坳陷主要探井和１３个露头剖面近１６０个中生界源岩样品镜质体反射率进行了实测分析，并利用地震测线人工井模拟计算镜质体反射率，初步明确了库车坳陷三叠—侏罗系源岩有机质成熟度的分布规律。依南２井三叠系—侏罗系源岩实测镜质体反射率为１０３％～１４３％，阳１井中、下侏罗统实测镜质体反射率为０９５％～１１０％各个露头剖面镜质体反射率存在很大差异，露头剖面成熟度区域上总体呈现西部高（Ｒｏ高达１８１％～１８３％）东部低（Ｒｏ在０５６％～０７９％），中部介于东西部之间，北部低（Ｒｏ在０５７％～０６８％）南部高的特点。在逆冲带，由于近晚期逆冲断层将深部烃源层推到浅部或地表，即使埋深很浅，实测镜质体反射率仍较高

ORGANIC MATURITY OF MESOZOIC SOURCE ROCKS IN KUQA DEPRESSION, TARIM BASIN

Vitrinite reflectance values of 160 Mesozoic samples collected from the main exploratory wells and 13 outcrop sections in Kuqa depression have been analyzed, and meanwhile thermal maturity modeling for artificial wells from seismic profiles were performed, to delineate organic maturity distribution of Jurassic-Triassic source rocks in Kuqa depression. Vitrinite reflectance values of Jurassic-Triassic source rocks in Well YN2 range from 1.03% to 1.43%, the values of Middle-Lower Jurassic values of Jurassic -Triassic source rocks are obviously different in different outcrop sections, the west ourcrop sections show higher vitrinite reflectance value (1.81%1.83%), but the eastern outcrop sections show lower vitrinite reflectance value (0.57%0.68%), while vitrinite reflectance value of middle outcrop sections transit between the east and the west. The deeper source beds were thrust to the shallower depth or surface of earth by overthrust fault in overthrust belt, where the higher vitrinite reflectance values still occur, in despite of that source rock in this belt buried at very shallow depth now.