塔里木盆地石油地质基本特征

全面系统地总结并提出塔里木盆地１０大石油地质基本特征：（１）塔里木盆地为一古生界克拉通盆地与中新生界前陆盆地组成的大型叠合复合型盆地；（２）塔里木盆地经历了多期构造运动及多个演化发展阶段；（３）塔里木盆地主要有寒武—奥陶系、石炭—二叠系，三叠—侏罗系３套烃源岩；（４）塔里木盆地发育多套深埋优质储层及５套良好储盖组合；（５）塔里木盆地油气水性质复杂、油气藏类型丰富多样；（６）塔里木盆地富油又富气，天然气藏以凝析气藏为主；（７）塔里木盆地既有陆相油气，又有海相油气，已发现的石油以海相成因为主，天然气以陆相成因为主；（８）塔里木盆地已发现的油气藏以中小型为主，具有埋深大、丰度低、产能高的特点；（９）塔里木盆地具有多个成油气系统、多期成藏及油气多次运移再分配的特点；（１０）塔里木盆地油气分布十分复杂，油气聚集受多重因素制约

Petroleum Geologic Features of Tarim Basin

Tarim Basin is a superimposed and composite basin of numerous proto type basins combosed of the Paleozoic cratonic basins and Meso Cenozoic foreland basins.It has undergone many tectonic movements and 7 evolutionary stages.Three major strata of source rocks are found that is ,the Cambrian Ordovician,Carbonic Permian and Triassic Jurassic.Multiple and deep buried rich reservoir rocks are also developed together with 5 associated reservoir cap rocks. The oil,gas and water are complicated in their properties and the oil/gas pools are rich and varied in their types.Both oil and gas are rich in this basin and the gas pools discovered are dominated by condensed gas. The oil and gas are not only of continental genesis but also of marine genesis;the oil pools are mainly of marine genesis,whereas the gas pools are mainly of continental genesis.Most of the pools are found to be middle to small sized and are characterized by deep burying,lower richness and high productivity.There are several petroleum systems in the basin and the pools formed in multiple ages;the oil and gas have experienced several times of migration and re accumulation.Still,the distribution of oil and gas in Taim Basin is very complicated and is controlled by many factors,which increases the difficulty of petroleum exploraton.