测井约束地震岩性预测方法及应用——以汤原断陷达连河组SD2 段为例

为精细刻画汤原断陷达连河组的岩性展布, 运用测井约束地震岩性预测方法, 利用研究区丰富的井震及钻井资料, 拟合速度- 岩性间的函数关系, 经高精度层序地层约束后, 进行岩性预测。预测结果符合率达86% , 揭示了目的层岩性空间展布规律: 沉积厚度高值区和砂体厚度中心主要分布于控盆断裂一侧, 在研究区内主要分布于靠近盆缘断裂的东部凹陷带。

Lithologic prediction and application of log-constrained seismic: an example from SD2 segment of Dalianhe Formation in Tangyuan fault depression

In order to depict lithologic distribution of Dalianhe Formation in Tangyuan Fault Depression subtly, lithologic prediction of log-constrained seismic, plentiful logging-seismic and drilling data have been used to fit out the functional relation of velocity-lithology. L ithologic prediction has been done after high-precision sequence stratigraphy constraint, and the coincidence rate of prediction result is up to 86%, which reveales the rule of lithologic spatial distribution is the high value area of sedimentary thickness and the thickness center of sand body distribute mainly in basin controlling faults side, and distribute mainly in the eastern dep ression zone near the basin boundary fault in the area.