【摘要】 为了优化咸水层CO2埋存场地的选址工作,本文针对陆相沉积盆地咸水层CO2埋存场地选址相关的若干问题进行了探讨。经研究认为:CO2地质埋存场地选址与油气勘探工作的结合具有很强的现实意义;从储盖条件考虑,应优先考虑在滩坝相和河流三角洲前缘相分布区实施后续场地选址工作,而针对盆地类型,结构简单的盆地如坳陷盆地一般更适宜CO2的埋存;从圈闭适宜性分析,规模较大、储层渗透性较好的透镜体岩性圈闭是潜在的CO2埋存场地,由于水动力圈闭和断层圈闭涉及复杂的地下水动力场、CO2参与下复杂的地球化学反应和岩体力学稳定性等问题,因此需要进一步的理论研究以论证其作为CO2埋存场地的可行性,而背斜是良好的圈闭类型;从勘探程度条件考虑,若其他影响因素空间差异不明显,应优先选取圈闭预探和评价阶段被核销或放弃的圈闭以及未实施预探工作的区域进行后续场地选址工作。更多还原

【Abstract】 For the purpose of optimizing the site selection work for CO2 geological storage in saline aquifers of continental sedimentary basins,this paper discusses several related issues about site selection and draws several conclusions.The combination of site selection for CO2 geological storage and oil-gas exploration is of great realistic significance.From the point of view of reservoir-cap conditions,the regions in which beach and bar facies and delta front facies are distributed should be considered preferentially for the following site selection work.In general,the basins with simple structures are more suitable for CO2 storage,such as sag basins.The lens-type traps with large dimensions and high reservoir permeability are potential sites for CO2 storage.Since the hydrodynamic traps and the fault traps are involved in problems like complicated groundwater flow,CO2-fluid reactions and rock mechanics,further studies are needed to verify their feasibility and availability to CO2 storage.Anticlinal trap is a good trap type.From the point of view of exploration degree,the abandoned geological traps and the regions which were not prospected in the stage of trap pre-prospects should be considered preferentially for the following site selection work when most other conditions which impact CO2 storage efficiency do not vary significantly with regions.更多还原