计算地层古厚度的一种方法

A NEW METHOD TO CALCULATE THE ANCIENT THICKNESS OF SEDIMENTARY SEQUENCES

牟中海

Mou Zhonghai

西南石油学院 四川南充 637001

Southwest China Petroleum Institute, Nanchong, Sichuan Province

过去主要依据钻井和测井资料进行地层古厚度的研究和计算,由于钻井有限,故研究成果的应用受到了限制。本文应用密度测井资料,结合地震速度谱所算的厚度和砂岩百分比资料进行计算,从而可求取整个盆地不同时期、不同层位的地层古厚度,特别是计算中砂岩百分比的引入,使混合岩类及过渡岩类的地层古厚度的计算得以实现。

As the study and calculation on the ancient thickness of sedimentary sequences used to be based on the data of drilling wells and loggings, the application of the calculation is limited by the number of drilling wells. In this paper, the density logging data is applied combining with the thickness estimated from seismic wave velocity and the percentage parameter of sandstones in order to get the ancient thickness of sedimentary sequences in various stages and levels throughout basins. In particular, the introduction of sandstone percentage makes it possible to calculate the ancient thickness of mixed and intermediate types of strata in the basins.

https://doi.org/10.11781/sysydz199304414