CO_2改善单56超稠油油藏蒸汽吞吐效果实验
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摘要
为了解决单56超稠油油藏单纯蒸汽吞吐开采效果差的问题,开展了CO2辅助蒸汽吞吐工艺研究。结果表明:单56超稠油60℃单纯热水驱油效率仅26.5%,当温度达到150℃时才会有理想的吞吐效果;当CO2在原油中的溶解气油比达到23.9 sm3/m3时,60℃热水驱替效率达到了37.2%,大幅度改善了蒸汽的驱替效果;核磁在线扫描CO2在岩心中稠油的溶解扩散情况表明CO2的自发扩散速度很慢。实验得出单56超稠油CO2辅助蒸汽吞吐工艺参数:注汽前注入CO2焖井时间为5 d以上,蒸汽波及范围内CO2的溶解气油比为标况下23.9 m3/m3,水平井的最优注汽强度为10~12 t/m。
In order to solve the problem of the poor developed effects of the simple steam huff and puff in Shan-56 ultra heavy oil reservoir,the technology of carbon dioxide assisted steam huff and puff was studied. The achievements show that the oil displaced efficiency at 60 ℃ is only 26. 5%,while when the temperature reaches 150 ℃,the ideal effects of the huff and puff can be obtained; when the ratio of the dissolved gas to oil in the crude oil reaches 23. 9 sm3/m3,the efficiency of the hot water displacement at 60 ℃ is up to 37. 2%,thus the displaced effects are greatly improved; the online-scanned oil dissolution and diffusion by the nuclear magnetic resonance for the CO2 in the cores show that the spontaneous diffusion rate of the CO2 is rather slower. The suggested technological parameters for the CO2 assisted steam huff and puff of Shan-56 ultra heavy oil show as follows: stew more than 5 days before the injection of CO2,the ratio of the dissolved gas to oil is 23. 9 sm3/m3 for the swept CO2 by the steam,and the optimal steam injected strength of the horizontal well is 10-12 t/m.
In order to solve the problem of the poor developed effects of the simple steam huff and puff in Shan-56 ultra heavy oil reservoir,the technology of carbon dioxide assisted steam huff and puff was studied. The achievements show that the oil displaced efficiency at 60 ℃ is only 26. 5%,while when the temperature reaches 150 ℃,the ideal effects of the huff and puff can be obtained; when the ratio of the dissolved gas to oil in the crude oil reaches 23. 9 sm3/m3,the efficiency of the hot water displacement at 60 ℃ is up to 37. 2%,thus the displaced effects are greatly improved; the online-scanned oil dissolution and diffusion by the nuclear magnetic resonance for the CO2 in the cores show that the spontaneous diffusion rate of the CO2 is rather slower. The suggested technological parameters for the CO2 assisted steam huff and puff of Shan-56 ultra heavy oil show as follows: stew more than 5 days before the injection of CO2,the ratio of the dissolved gas to oil is 23. 9 sm3/m3 for the swept CO2 by the steam,and the optimal steam injected strength of the horizontal well is 10-12 t/m.
引文
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[24]王福顺,牟珍宝,刘鹏程,等.超稠油油藏CO2辅助开采作用机理实验与数值模拟研究[J].油气地质与采收率,2017,24(6):86-91.
[25]王建海,李娣,曾文广,等.塔河缝洞型油藏氮气+二氧化碳吞吐先导试验[J].大庆石油地质与开发,2015,34(6):110-113.
[26]陈国利.二氧化碳驱开发效果评价方法[J].大庆石油地质与开发,2016,35(1):92-96.
[27]赵淑霞,王锐,吕成远,等.溶解作用对低渗油藏CO2驱两相相渗的影响[J].大庆石油地质与开发,2016,35(3):126-129.
[28]刘义坤,刘扬,王凤娇,等.江37区块浅薄层稠油油藏蒸汽吞吐参数优化[J].特种油气藏,2015,22(6):90-92.
[29]朱学东.埕东油田埕南深层超稠油开采配套工艺技术[J].石油天然气学报,2013,35(1):138-140.
[30]邵维志,丁娱娇,王庆梅,等.用核磁共振测井定量评价稠油储集层的方法[J].测井技术,2006,30(1):67-71.
[31]肖立志.核磁共振成像测井与岩石核磁共振及其应用[M].北京:科学出版社,1998.
[2]曹嫣镔,刘冬青,王善堂,等.中深层稠油油藏化学辅助蒸汽驱三维物理模拟与应用[J].石油学报,2014,35(4):739-744.
[3]曹嫣镔,刘冬青,张仲平,等.胜利油田超稠油蒸汽驱汽窜控制技术[J].石油勘探与开发,2012,39(6):739-743.
[4]李敬,杨盛波,张瑾.超稠油热化学复合体系影响因素实验研究[J].科学技术与工程,2014,14(33):41-45.
[5]陶磊,李兆敏,毕义泉,等.胜利油田深薄层超稠油多元复合开采技术[J].石油勘探与开发,2010,37(6):732-736.
[6]Fu Lipei,Zhang Guicai,Ge Jijiang,et al.Study on organic alkali-surfactant-polymer flooding for enhanced normal heavy oil recovery[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2016,508(5):230-239.
[7]黄亮,石军太,李彦尊,等.稠油油藏热采水平井均衡采油新方法[J].油气地质与采收率,2016,23(2):115-120.
[8]张亮,王舒,张莉,等.胜利油田老油区CO2提高原油采收率及其地质埋存潜力评估[J].石油勘探与开发,2009,36(6):737-742.
[9]张丁涌.超稠油油藏HDCS开采技术优化[J].断块油气田,2017,24(3):409-412.
[10]陶磊,李兆敏,张凯,等.二氧化碳辅助蒸汽吞吐开采超稠油机理[J].油气地质与采收率,2009,16(1):51-54.
[11]李兆敏,陶磊,张凯,等.CO2在超稠油中的溶解特性实验[J].中国石油大学学报(自然科学版),2008,32(5):92-95.
[12]李亮.CO2在孤岛稠油中的溶解性质分析[J].大庆石油地质与开发,2017,36(1):134-137.
[13]李向良.温度和注入压力对二氧化碳驱油效果的影响规律实验[J].油气地质与采收率,2015,22(1):84-87,92.
[14]欧阳传湘,杜晓霞.超稠油物性及其与CO2相互作用机理研究[J].钻采工艺,2010,33(4):90-93.
[15]李兆敏,孙晓娜,鹿腾,等.二氧化碳在毛8块稠油油藏热采中的作用机理[J].特种油气藏,2013,20(5):122-124.
[16]宋道万.二氧化碳混相驱数值模拟结果的主要影响因素[J].油气地质与采收率,2008,15(4):72-74.
[17]梁玲,程林松,李春兰.利用CO2改善韦5稠油油藏开采效果[J].新疆石油地质,2003,24(2):155-157.
[18]张红梅,安九泉,吴国华,等.深层稠油油藏CO2吞吐采油工艺试验[J].石油钻采工艺,2002,24(4):53-56.
[19]李振泉,李相远,袁明琦,等.商13-22单元CO2驱室内实验研究[J].油气采收率技术,2000,7(3):9-11.
[20]刘一江.聚合物和二氧化碳驱油技术[M].北京:中国石化出版社,2001.
[21]李振泉.油藏条件下溶解CO2的稀油相特性实验研究[J].石油大学学报,2004,28(3):43-47.
[22]克林斯M A.二氧化碳驱油机理及工程设计[M].程绍进,译.北京:石油工业出版社,1989.
[23]吴光焕,夏志增,时凤霞,等.CO2对超稠油物性影响的实验研究[J].油田化学,2015,32(1):67-71.
[24]王福顺,牟珍宝,刘鹏程,等.超稠油油藏CO2辅助开采作用机理实验与数值模拟研究[J].油气地质与采收率,2017,24(6):86-91.
[25]王建海,李娣,曾文广,等.塔河缝洞型油藏氮气+二氧化碳吞吐先导试验[J].大庆石油地质与开发,2015,34(6):110-113.
[26]陈国利.二氧化碳驱开发效果评价方法[J].大庆石油地质与开发,2016,35(1):92-96.
[27]赵淑霞,王锐,吕成远,等.溶解作用对低渗油藏CO2驱两相相渗的影响[J].大庆石油地质与开发,2016,35(3):126-129.
[28]刘义坤,刘扬,王凤娇,等.江37区块浅薄层稠油油藏蒸汽吞吐参数优化[J].特种油气藏,2015,22(6):90-92.
[29]朱学东.埕东油田埕南深层超稠油开采配套工艺技术[J].石油天然气学报,2013,35(1):138-140.
[30]邵维志,丁娱娇,王庆梅,等.用核磁共振测井定量评价稠油储集层的方法[J].测井技术,2006,30(1):67-71.
[31]肖立志.核磁共振成像测井与岩石核磁共振及其应用[M].北京:科学出版社,1998.