利用改进型DIVA方法对LD构造进行储层评价的尝试

Reservoir evaluation with revised DIVA method in structure LD

当砂层厚度变化不大时，孔隙度和流体成分将控制地层的层速度。本文根据差异层间速度分析（DIVA）原理，以含水砂岩速度为背景层速度，利用改进型DIVA方法正演了目的层的差异层间速度。LD构造东营组下段异常低的差异层间速度带很可能就是孔隙比较发育或者烃类富集的部位。

If the thickness of sandstone has no obvious variations,the porosity and its fluid contents will control thc interval velocity. Based on the original principle of DIVA, we modcl the differential interformational velocities with rcvised DIVA method. And the abnormally lower velocity belt at lower Dongying Formation in structuro LD may mean the location of high-porosity or hydrocarbon accumulation.