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为了搞清鄂尔多斯盆地古隆起周边的古岩溶地貌对储层的影响,根据古隆起周边的地质背景,探讨了稳定的克拉通盆地浅海环境下形成碳酸盐岩构造。不整合面大致代表了古岩溶地貌形态。按照成岩阶段和成岩环境把鄂尔多斯盆地古岩溶划分为同生期岩溶,表生期岩溶,埋藏期岩溶三种类型。运用“残余厚度法”及“印模法”恢复古地貌。将古岩溶地貌划分为岩溶台地,岩溶斜坡,岩溶残丘三个二级构造单元和高地,平台,残丘,洼地等多个三级构造单元,其发育主要受岩性、构造、成岩环境和古气候等控制。通过对古岩溶特征及古地貌的恢复进一步了解油气储存的空间和运移规律。了解古岩溶储层特征。
In order to find out the influence of palaeo-karst topography on reservoirs in the Ordos Basin, the formation of carbonate rocks under the shallow sea environment of the stable craton basin is discussed based on the geological background of the paleo-uplift. Unconformity generally represents the ancient karst geomorphology. According to the diagenetic stage and the diagenetic environment, the paleokarsts in the Ordos Basin can be divided into three types, namely synrochase karstification, epikarst karstification and burial karst. Use “residual thickness method” and “impression method” to restore ancient landform. The ancient karst landform is divided into three second-level tectonic units, such as karst platform, karst slope and karst residual hillock, and three tertiary structural units, such as highland, platform, residual hill and depression, which are mainly affected by lithology, structure, diagenetic environment and Ancient climate control. Through the restoration of ancient karst features and palaeogeomorphology, we can further understand the space and migration rules of oil and gas reservoirs. Understand ancient karst reservoir characteristics.