寒武系、奥陶系地层主要为灰岩和白云岩，其问赋存有较丰富的岩溶裂隙水。
There is abundant karst fissure water in the limestone and dolomite of Cambrian and Ordovician.
本文还对笔石动物群的性质进行了分析，与邻区和国外相当地层进行了对比，并讨论了本区寒武系与奥陶系界线。
The nature of graptolite fauna, the correlation of the graptolite-bearing strata with that in other area and the Cambrian-Ordovician boundary are also discussed.
对我国东部不同地层区一些代表性的寒武系—奥陶系界线层位开展了碳、氧同位素研究。
Carbon and Oxygen isotopic study of some representative Cambrian Ordovician boundary strata of various stratigraphic areas in East China has done.
奥陶系风化壳上覆铝土质岩类，封盖条件好，有利于形成大型地层、岩性圈闭。
The Ordovician weathering crust has good sealing and covering conditions of aluminum rock on the top, favorable for formation of large-scale stratum and lithologic trap.
鄂尔多斯盆地中部大气田是发育在奥陶系顶碳酸盐岩古风化壳中的地层油气藏。
The giant central gas field in E′erduosi Basin is a stratigraphic gas reservoirs developed in the ancient weathered crust of carbonate rocks on the top of the Ordovician.
鄂尔多斯盆地中部气田奥陶系马家沟组属蒸发边缘海相地层，其风化壳是中部气田的主要产气层段。
The weathering crust of Majiagou Formation in Ordovician of Changqing Gasfield in Ordos Basin is the major pay zone with the evaporated marginal sea facies.
吉林槽区的早古生代地层可分为寒武系呼兰群及奥陶系辽源群。
The early Paleozoic strata can be divided into the Cambrian Hulan Group and the Ordovician Liaoyuan Group.
分别对各构造单元内部及全盆地奥陶系各地层单元进行对比；指出盆地内存在相带变化、奥陶系内部地层间断等问题。
It is pointed out that there exist the facies changes, rock unit diachroneity and discontinuity of interior formations in Ordovician.
目前这种方法在塔河油田奥陶系碳酸岩盐地层的能谱测井资料质量评价中取得了明显的效果。
This proposed method has been used for quality evaluation of natural Gamma spectral log in the Ordovician carbonate strata in Tahe oilfield.
轮南潜山奥陶系储层埋藏深、地层温度高、孔隙裂缝发育等特征给酸压施工和酸压材料带来诸多困难。
The Ordovician carbonate reservoir of Lunnan buried hill is deeply buried underground. The reservoir temperature is high, and fractures develop.
通过在塔里木盆地奥陶系碳酸盐岩地层中的应用表明，该方法具有较好的应用效果。
This method has been applied in the Ordovician carbonate reservoir located in the middle of the Tarim Basin of China with good results.
在逆冲断裂的下盘，是一套正常沉积层序的地层，分别为侏罗系、三叠系、石炭—二叠系、寒武—奥陶系等地层。
There is a normal deposition sequence stratigraphy beneath the lower wall of over-thrust fault, such as Jurassic, Triassic, Permian-Carboniferous, Cambrian-Ordovician system.
在逆冲断裂的下盘，是一套正常沉积层序的地层，分别为侏罗系、三叠系、石炭—二叠系、寒武—奥陶系等地层。
There is a normal deposition sequence stratigraphy beneath the lower wall of over-thrust fault, such as Jurassic, Triassic, Permian-Carboniferous, Cambrian-Ordovician system.
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