塔里木盆地热演化

选择了里木盆地１１条地震解释剖面，采用二维模拟方法，结合构造深化特征，恢复了震旦纪以来的地热史和生烃史。部分井点的结果对比显示。模拟配实测数据基本一致。研究表明，震旦纪至现今的热演化可分为四个阶段；中生代稳定热演化（低热流“冷盆”）阶段；志留纪至晚古生代热衰减、“热盆”和“冷盆”过度的热演化阶段；中生代稳定絷演化（低热流“冷盆”）阶段，新生代岩石圈找曲热演化阶段。模拟了塔里木盆地内三大套生油岩系的

THERMAL EVOLUTION IN TARIM BASIN

Thermal evolution, including Palaeotemperature, palaeoheat-flow and hydrocarbon generation history, is simulated from Sinian to the current by 2-D numerical method based on the tectonic along 11 seismic profiles in Tarim Basin. At several well locations, the simulation results match the measured data well. It is indicated that the thermal evolution from Sinian to the current in Tarim Basin can be divided into four stages. (1 )High heat flow (hot basin)thermal evolution from Sinian to Ordovician; (2)Thermal decline from Silurian to later Paleozoic, being 'hot basin' to 'cool basin' 4 (3) The stable thermal evolution (cool basin) in Mesozoic; (4)Thermal evolution of the lithosphere flexibility in Cenozoic. Furthermore, the hydrocarbon generation histories in the three source rocks in Tarim Basin are simulated, and the prospecting accumulations in favorable areas are analyzed taking account of the tectonic evolution.