���� TOUGH��EACT ���������ʾ������ʵ���������־��ĵز���������Ժ��ͼ��Ǻ��ʹ�����һ���������� CO 2 ���ʴ��棬��������ˮ���뺬�������鷽�����жԱ�ģ�⡣�����ʾ��������ز�ˮ����Ҫ����Ũ�ȼ��ܿ󻯶ȵ�����ˮ�飬��Ҫ��̼����Ƭ����ʯ���������� CO 2 �ķ��������С����ˮ�顣�����͵Ĵ��ڽ����˿�����ˮ��Һ�������ӽ����ıȱ�����ʹ���ĺ�ˮ���Ͷȣ�����ռ�ݿ������ռ䡣����ˮ���������ޣ����Ͳ���Ȼ����� CO 2 ���ʷ�棬������ŵ�����Ͳ����� CO 2 ���ʷ�������������

Based on the geological conditions of Well Daqingzi in the demonstration project area��the authors used TOUGH��EACT to design two schemes including oil group and saline group��to explore oil reservoirs and non- oil reservoirs��which is more suitable for CO 2 geological storage�� The results show that the main ion concentration and total salinity of the formation water in the oil bearing group is lower than that of the saline group��so do the amount of dawsonite which is the main mineral for CO 2 geological storage��and the CO 2 mineral trapping in the oil group�� The existence of the residual oil reduced the specific surface area and water saturation for the ion exchange between the mineral and the formation water��and occupied the space of mineral deposits�� Though water-rock interaction is limited��CO 2 geological storage can be completed in oil reservoir��and there are many advantages showing that oil reservoir is still beneficial for CO 2 geological storage��