The north border of the basement , extended from west to east along the north latitude 38 , this latitude structure zone is part of the zone in the middle of ordos basin along the north latitude 38 , this is caused by the rate of earth rotation , according with the condition of global harmonic function 压陷北界沿北纬38带东西向展布,该纬向构造是沿鄂尔多斯盆地中部38带分布的纬向构造带的一部分,是由地球自转速率变化引起,符合全球协和函数的条件。
After synthetic evaluation to the permian reservoir , it was considered that there were deep lake facie in mazhong - heidun - shibandun structure zone , it was suitable to depositing thick carbonate rock . these cracks were developed in the zones where the stress was concentrated . these zones are fairly good oil and gas exploration areas . 对三塘湖盆地二叠系储层进行综合评价后,认为:该区马中?黑墩?石板墩一带属半深湖沉积亚相,有利于碳酸盐岩的沉积,储集体沉积比较厚,并且此带属于应力集中的变形强烈带,故裂缝较发育,从而成为最有利油气勘探区,其次有利区为牛圈湖构造带,这主要是由牛圈湖地区的颗粒溶孔较发育所致。