地层倾角对CO2地质封存的影响研究—以鄂尔多斯CCS工程为例

CO2地质储存是减少CO2向大气排放的有效手段。CO2在储层中的运移受地层的物理属性和空间展布形态的影响，本文以鄂尔多斯CO2地质封存示范场地石千峰组为研究对象，研究了地层产状倾斜对CO2地质储存的影响。结果表明，在定压注入时，地层倾角对CO2的空间分布、CO2的注入速率、CO2的空间运移距离、以及CO2的封存量等均呈现出规律性的影响；地层倾角越大，注入速率越小、横向运移距离越远，而其封存量小；地层倾角的增大不利于CO2地质封存。

Influence of strata dip on CO2 geological storage --a case study of Erdos CCS project

CO2 geological storage is an effective means to reduce CO2 emissions to the atmosphere. CO2 migration in the reservoir is affected by the strata physical properties and spatial distribution. The influence of strata dip to the geological storage of CO2 is researched taking the Shiqianfeng formation at Erdos CO2 geological storage demonstration sites as the study object. The results show that the strata dip affects the spatial distribution, injection rat, migration distance and the amount of storage etc regularly when injection at a constant pressure. The dip is larger, the injection rate is smaller, the lateral migration distance is farther, and its storage is smaller. The increase of dip is ＂not benefit for the geological storage.