渤海湾盆地深部有利储层发育的主控因素

Major Factors Analysis on Controlling the Formation of Favorable Reservoir in Deep Level of Bohai Bay Basin

本文主要从沉积、成岩方面及与之相关的因素来分析渤海湾盆地深部有利储层发育的主控因素。研究认为,除了沉积作用外,低地温梯度、高沉积速率、高加热速率、高生烃强度和异常压力等因素影响了成岩作用的进程和强度,对深部储层原生孔隙的保存和次生孔隙的形成产生积极的作用,造成了中部黄骅坳陷深层相对高孔高渗储层发育层段多,物性好,而东部辽河坳陷次之,西部冀中坳陷最差。

Main controlling factors for the development of deep buried reservoirs in the Bohai Bay basin are discussed on sedimentation, diagenesis and other related factors. Besides the influence of sedimentation, low geothermic gradient, high deposition rate, high heating rate, high hydrocarbon generation intensity and overpressure are main factors for the formation of anomaly high porosity intervals in deep buried reservoirs of the Bohai Bay basin, because they affected the course and intensity of diagenesis. The relatively high porosity and high permeability intervals were best developed in the Huanghua depression, and second in the Liaohe depression, and worst in the Jizhong depression.