( 4 ) from computing the safety coefficient of homogeneous and heterosphere slopes , we can get useful conclusion that the safety coefficient change in the course of precipitation duration ( 4 )通过计算相同降雨条件对均质边坡和成层土边坡稳定的影响，得出安全系数随降雨持时变化的曲线以及一些有益的结论。
2.
Research area is characteristic of heterosphere obviously , which mainly manifests that distribution , thichness and extent of delelopping of sand body is not symmetrical . difference of transverse permeating rate is more 10 times than longitudinal permeating rate . the research indicates : the principle productive formation at this area is the member of h8x , h8s on the lower hezi formation that are good reservoir 研究区储层非均质性明显，主要表现为砂体分布不均匀、厚度不均，发育程度不一，渗透率纵横向差异均在10倍以上等；储层发育较好的层段是山西组山1段，是本区的主要产层；神经网络技术对于储层物性参数的预测是一种比较有效的方法；储层综合评价指数对于储层的评价具有一定的理论和现实意义。
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