苏北地区中,古生界地热史恢复和生烃史模拟

苏北盆地为一新生代形成的拉张盆地，震旦纪至白垩纪地层构成了盆地的基底，本文对中、古生界碳酸盐岩盆地基底演化和盆地形成进行了四个阶段的古地热史恢复和生烃史模拟并依次叠加，得到了部分钻井的有机质的成熟度（Ｒ０值）。其结果基本上与地层实测（Ｒ０）值相吻合，为构造演化复杂的苏北地区中、古生界烃源岩成熟度提供了一些新的消息，并可作为该区进一步油气远景评价的参考。

RECONSTRUCTION OF GEOTHERMAL HISTORY AND SIMULATION OF HYDROCARBON GENERATION FROM PALEOZOIC TO MESOZOIC IN NORTHERN JIANGSU AREA

Northern Jiangsu basin is an extentional basin formed in late cretaceous. Its basement, the strata from Z to K 2, experienced three main tectonic stages: Paleozoic passive continental margin, late Paleozoic to early Mesozoic stable subsidence and Mesozoic thrusting. The carbonate strata of Paleozoic and Mesozoic are quite good source rocks for hydrocarbon. Reconstruction of paleo geotemperature and maturation degree will provide geat value for oil and gas exploration in this area. In this paper, the authors reconstruct the paleo getempeature and model the hydrocarbon maturation history of Paleozoic Mesozoic source rocks during the stages of basement evolution and Neocene basin formation. The calculated maturation degree is in accordance with the practical measuring values of part strata. some new information about source rock maturation is provided for further evaluation of oil gas prospect in northern Jiangsu area with complicated tectonic evolution.