摘要
结合长岩芯(细管)实验结果,利用长岩芯驱替实验评价了富气混相驱注入时机、注入方式以及注入量对混相驱效果的影响。在油藏条件下,液化石油气与天然气摩尔比为36∶64时,混相流体与地层原油能完全混相,与水驱相比,提高采收率在15%以上。在注入工艺参数中,早期注入有利于提高采油速度,交替注入有利于控制气窜,注入量对驱替效果和后续水驱压差影响较大,建议用数模方法优化注入段塞大小。
Combined with the result of long-tube test,the impact of injecting time,means and quantity of enriched gas miscible drive on the miscible effect is evaluated by the experiment of long-core test.Under reservoir condition,the miscible fluids,composed of GPL and gas with their mol proportion of 36:64,are capable of being fully miscible with crude oil,and enhance the recovery rate of 15% compared with water drive.In terms of the injecting technical parameters,early injection of miscible fluids is favor of enhancing production rate,and WAG is propitious to controlling gas-out.Injecting quantity of miscible fluids has a great impact on drive effect and differential pressure of sequent water drive,and it is advised to optimize injecting plug size of miscible fluids by means of numerical simulation in order to increase the economic benefits of miscible drive.
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第4期123-126,共4页
Journal of Southwest Petroleum University(Science & Technology Edition)
关键词
富气
混相驱
长岩芯
工艺参数
效果
enriched gas
miscible displacement
long core
process parameters
effect
