中国典型含油气盆地地层压力分布特征

地层压力 ,尤其是异常地层压力对油气藏的形成和保存有着重要的作用。对中国典型含油气盆地进行了科学的分类 ,分析了克拉通、裂谷、前陆三大类盆地的油气成藏特征 ,在收集了大量探井实测地层压力数据的基础上 ,统计研究了这三类盆地的地层压力分布模型。将该模型与俄罗斯含油气盆地地层压力与油气藏分布的关系对比发现 ,异常地层压力是一个普遍存在的地质现象 ,不同类型的含油气盆地从古生代到新生代地层压力有增大的趋势。中国典型含油气盆地地层压力分布表明 ,前陆盆地以异常高压油藏为主 ,克拉通盆地油藏压力轻微超压 ,裂谷盆地异常低压油藏有一定分布

Distribution features of formation pressure in typical petroliferous basin of China

The abnormal formation pressure has important effects on the accumulation and preservation of oil and gas reservoirs. The typical petroliferous basins were classified scientifically. The features of formation pressure distribution models of craton, foreland and rift basins in China were respectively generalized, according to the macroscopical statistics. Furthermore, the relationship between formation pressure and distribution of oil and gas was studied widely and compared with that of Russia. The abnormal formation pressure is prevalent in petroliferous basin, and the formation pressure of the Palaeozoic era is less than the Cenozoic era regularly. There are more over pressure reservoirs in foreland basin than the craton and rift basins in China.