稠油油藏注二氧化碳吞吐技术研究现状  

Research Status on CO_(2) Huff and Puff in Heavy Oil Reservoirs

作　　者：张禧璠 张静[2] 李文凯 杨子健 Zhang Xifan;Zhang Jing;Li Wenkai;Yang Zijian(College of Petroleum Engineering,Xi'an Shiyou University,Xi'an Shaanxi 710065;Research Institute of Exploration and Development,PetroChina Tuha Oilfield Company,Hami Xinjiang 839009;No.12 Oil Production Plant,PetroChina Changqing Oilfield Company,Qingyang Gansu 745000)

机构地区：[1]西安石油大学石油工程学院,陕西西安710065 [2]中国石油吐哈油田分公司勘探开发研究院,新疆哈密839009 [3]长庆油田分公司第十二采油厂,甘肃庆阳745000

出　　处：《中外能源》2024年第12期48-54,共7页Sino-Global Energy

摘　　要：CO_(2)吞吐技术不仅是一种可有效提高稠油油藏原油采收率的关键技术,也是一种减少CO_(2)排放的有效方法。在稠油油藏中,CO_(2)吞吐最主要的作用机理是降低原油黏度、使原油体积膨胀以及形成泡沫油,从而提高原油采收率。不同类型的稠油油藏、不同的生产阶段,CO_(2)吞吐的主要作用机理也不同,通常伴随着对烃类的萃取、降低界面张力、改善流度比等作用。CO_(2)吞吐技术正朝着多元化的方向发展,CO_(2)与其他气体、化学剂等进行复合吞吐相比单一的CO_(2)吞吐,具有更高的效率和更广的应用范围。CO_(2)与N_(2)复合吞吐能减轻CO_(2)的腐蚀作用;与化学剂复合吞吐可以充分发挥气体的扩散作用,效率更高;与泡沫复合吞吐可对高渗层进行封堵,提高CO_(2)扩散范围。CO_(2)多井协同吞吐可进一步扩大注入半径及波及范围,使井间剩余油得到有效动用。目前CO_(2)吞吐技术的发展仍面临诸多挑战,沥青质沉淀、设备管线腐蚀、气源不足、CO_(2)捕集成本过高以及注入过程中气窜等问题制约了其发展。CO_(2) huff and puff is a key technology that can effectively improve oil recovery in heavy oil reservoirs and an effective method to reduce CO_(2) emissions.The main mechanism of CO_(2) huff and puff for the heavy oil reservoirs is to reduce the viscosity of crude oil,expand the volume of crude oil,form foam oil,and then improve the oil recovery.The main mechanism of CO_(2) huff and puff is different for different types of heavy oil reservoirs and different production stages,which is usually accompanied by the extraction of hydrocarbons,the reduction of interfacial tension,and the improvement of mobility ratio.CO_(2) huff and puff is developing in a diversified direction.Compared with a single CO_(2) huff and puff,CO_(2) combined with other gases and chemicals has higher efficiency and a wider application range.The combined huff and puff of CO_(2) and N_(2) can reduce the corrosion of CO_(2).CO_(2) huff and puff combined with chemical agents can give full play to gas diffusion with higher efficiency.CO_(2) huff and puff combined with foam can seal the high-permeability layer and increase the CO_(2) diffusion range.CO_(2) multi-well coordinated huff and puff can further expand the injection radius and sweep range,so that the remaining oil between wells can be effectively produced.At present,the development of CO_(2) huff and puff still faces many challenges,and asphaltene precipitation,equipment pipeline corrosion,insufficient gas source,high CO_(2) capture cost,and gas channeling during injection restrict its development.

关 键 词：CO_(2)吞吐 稠油油藏 降黏 体积膨胀 泡沫油 复合吞吐 

分 类 号：TE345[石油与天然气工程—油气田开发工程]