稠油注蒸汽加氮气吞吐试验研究  

Experimental study on steam injection complemented by nitrogen huff and puff for heavy oil recovery.

作　　者：陈荣灿[1] 霍进[1] 郭新和 

机构地区：[1]新疆石油管理局重油开发公司,新疆克拉玛依834000

出　　处：《特种油气藏》1999年第3期59-64,70,共7页Special Oil & Gas Reservoirs

摘　　要：方法　在室内试验和数模的基础上 ,对注蒸汽和加氮气吞吐进行了研究。目的　提高稠油的开发效果。结果　注蒸汽加氮气吞吐优于单注氮气吞吐和单注蒸汽吞吐 ;注氮气时机最早应在第三周期 ,而第四、五周期注入效果最好 ;影响注氮气最敏感的因素是混注比、地层渗透率、渗透率比值及其原油粘度。结论　现场实施注蒸汽加氮气吞吐 1 6井次 ,措施有效率达 92 3% ,油井生产时率提高 45 %以上 ,周期产油提高 34 6t,油气比提高 0 1 6 ,投入产出比 1∶9,累积增油41 5 8t ,净增产值 395 3× 1 0 4元 ,取得了显著的经济效益。该方法成本低 ,可大规模推广应用。Method Based on indoor experiment and numerical simulation, study on steam injection and nitrogen huff and puff is carried out. Purpose To improve heavy oil development effect. Result In heavy oil development, stean injection complemented by nitrogen huff and puff is preferable to nitrogen injection or steam huff and puff. Furthermore, nitrogen injection shouldn't start later than the third cycle and its optimum injection period is that between the fourth and fifth cycles. Meanwhile, some of the most sensitive factors affecting nitrogen injection are miscible injection ratio, formation permeability, relative permeability and its oil viscosity. Conclusion Experiments of steam injection complemented by nitrogen huff and puff have been performed 16 times with the following results: efficiency up to 92 3%, productivity improved 45%, output of each cycle increased 346 t, OGR enhanced 0 16, cash flow up to 1∶9,accumulative oil production reached 4 158 t, net value increment being RMB 395. 3\{×10\+4\}. Obviously, it is reasonable to spread this method on a large scale because it features low cost and high economic returns. \;

关 键 词：稠油 注蒸汽 吞吐试验 注氮气 油田注气 

分 类 号：TE345[石油与天然气工程—油气田开发工程] TE357.44