深部咸水层二氧化碳地质储存场地选址储盖层评价

Reservoir and caprock evaluation of CO_2 geological storage site selection in deep saline aquifers

深部咸水层CO2地质储存属于环保型工程项目,开展地质评价来确定良好的储盖层是实现CO2地质储存长期、有效、安全封存的首要前提。储层地质评价内容主要包括储层的物理性质及其注入能力等;盖层地质评价内容主要包括盖层发育特征及封闭能力等。在规划选址到工程选址的不同阶段,储盖层评价的内容和对象应根据不同阶段的目的依次提高精度和量化程度。通过国内深部咸水层CO2地质储存工程场地选址阶段划分,结合储盖层地质评价的主要内容,初步建立了储盖层适宜性评价指标及其分级标准,对国内深部咸水层CO2地质储存工程场地选址中的储盖层地质评价及适宜性评价工作具有一定的指导意义。

CO2 geological storage belongs to environmental protection projects, reservoirs and caprocks evaluation are the important base for CO2 sequestration safely for long period of time. Reservoirs geological evaluation contents include physical properties and CO2 injectivity, while caproeks geological evaluation contents include development characteristics and quantitative sealing capacity. In the different stages of planning and engineering site selection, contents and objects of reservoir and caprock evaluation should improve the precision and quantization degree according to the evaluation purposes. At the basis of CO2 geological storage engineering site selection stages division, combined with reservoirs and caprocks evaluation contents, suitable evaluation indexes and grading standard are established preliminary, which provides guidance for reservoirs and caprocks geological and suitable evaluation of CO2 geological storage engineering site selection in deep saline aquifers of China.