摘要
声波时差与泥岩压实特性有密切的相关关系,在不同的压实条件下,可以运用声波时差与储层流体压力的关系,计算储层的流体压力,储层流体势可以用Hubbtert公式计算。按照渗流力学的理论,地下天然气的运移从流体势高的地区指向低势区,并在低势区合适的部位聚集。根据以上观点并结合东濮凹陷深部天然气储层特点,对这一地区深部天然气储层某一孔隙带的流体势分布和成藏规律进行了预测。
there is a close relation between acoustic transit time value and muclstone compaction properties. In this paper ,a calculation method of reservoir fluid pressure by using acoustic transit time data is introduced. On the theovy of hydrodynamics, it is consider-ated that the undergroud water and the gas migrate from the higher potential area to the lower one and accumulate in the proper trap with relatively lower fluid potential along the road of their migration, therefore the lower fluid potential area is favorable to form a gas reservoir. Based on this, a case study of a deep burial porosity belt in Dongpu sag is performed, the distribution of water and gas potential are predicted and two promise gas accumulations are forcasted.
