碳酰胺辅助蒸汽吞吐的效率及参数优化  

Efficiency and Parameter Optimization of Carbonamide Assisted Steam Huff and Puff

作　　者：胡春余 沈海兵 杨宏亮 李一波[2] HU Chunyu;SHEN Haibing;YANG Hongliang;LI Yibo(Sinopec Xinjiang Xinchun Petroleum Development Co.,Ltd.,Karamay Xinjiang 834000,China;Southwest Petroleum University,Chengdu Sichuan 610500,China)

机构地区：[1]中石化新疆新春石油开发有限责任公司,新疆克拉玛依834000 [2]西南石油大学,四川成都610500

出　　处：《当代化工》2024年第12期2802-2807,共6页Contemporary Chemical Industry

基　　金：国家自然科学基金项目(项目编号:5217042147)。

摘　　要：为了解在实际地层中碳酰胺辅助蒸汽吞吐的效果、作用规律和提采机理,进行物理模拟实验研究。碳酰胺辅助蒸汽吞吐实验是利用大型三维填砂实验装置,使用物理模型模拟地层油藏条件,研究碳酰胺辅助蒸汽吞吐过程中碳酰胺的注入时机、注入轮次、注入蒸汽量和注入碳酰胺量对实际采油效果的影响。结果表明:在蒸汽吞吐的早期注入碳酰胺可以大幅提高周期采收率,较上周期提高79.3%;增加碳酰胺注入轮次,可以保证单轮次采收率和油汽比处于高位,从而提高最终采收率;减少蒸汽的注入量后,导致碳酰胺在地层条件下分解不充分,导致提采效果不好,周期采收率降低近50%;减少碳酰胺的注入量后,注入的反应物不足导致碳酰胺分解产物不足,未能很好地发挥作用,油汽比和采收率偏低。In order to understand the effect,action law and recovery mechanism of carboxamide-assisted steam huff and puff in actual formation,physical simulation experiments were carried out.Carbonamide-assisted steam huff and puff experiment is to use a large-scale three-dimensional sand-filling experimental device to simulate the formation and reservoir conditions by using a physical model,and to study the effects of injection timing,injection rounds,steam injection amount and carboamide injection amount on the actual oil recovery effect during carbonamide-assisted steam huff and puff.The results show that injecting carboxamide at the early stage of steam huff and puff can greatly improve the cyclic oil recovery,which is 79.3%higher than that of the previous cycle.Increasing the number of carboxamide injection rounds can ensure that the single-round recovery rate and oil-steam ratio are at a high level,thus improving the ultimate recovery rate;After reducing the steam injection,the carboxamide is not fully decomposed under the formation conditions,resulting in poor recovery effect and a reduction of cyclic recovery by nearly 50%.After reducing the injection amount of carboxamide,the insufficient injected reactants led to insufficient decomposition products of carboxamide,which failed to play a good role,and the oil-steam ratio and recovery ratio were low.

关 键 词：碳酰胺 蒸汽吞吐 物理模拟实验 蒸汽吞吐参数优化 采收率 

分 类 号：TE311[石油与天然气工程—油气田开发工程]