A Method to Identify the Combustion State Based on Characteristics of Chromatographic Fingerprint of Fluid Generated From In-situ Combustion of Heavy Oil

doi:10.3969/j.issn.1006-6535.2021.05.020

Abstract

Abstract: In order to clarify the variation rules of physical and chemical properties of crude oil and tail gas in the process of in-situ combustion of heavy oil, an in-situ combustion experiment on heavy oil was conducted using an indoor three-dimensional physical model, and a study was carried out on the characteristics of chromatographic fingerprint of saturated hydrocarbons, aromatic hydrocarbons, olefins and tail gas components of the crude oil and tail gas after high-temperature oxidation by in-situ combustion. It was found in the study that The physical properties of the crude oil were improved and the contents of saturated hydrocarbons and aromatic hydrocarbons in the group components were increased after in-situ combustion; the content of n-alkanes in the chromatographic fingerprint of saturated hydrocarbons was increased significantly, and the hydrocarbon weight ratio was increased; the crude oil, new olefin compounds were generated in pairs with saturated hydrocarbons with the same carbon number, and the ratio of olefins to saturated hydrocarbons with the same carbon number was always less than 0.5; the phenanthrene series of compounds in the chromatographic fingerprint of aromatic hydrocarbons showed significant methyl transfer and demethylation; the multidimensional gas chromatogram of the exhaust gas showed olefins, hydrogen, carbon monoxide, and other characteristic components of high-temperature oxidation in in-situ combustion. This study provides an effective technical method to indicate the combustion state during the in-situ combustion, and supports the identification of the combustion status of in-situ combustion of crude oil.

Key words: in-situ combustion, combustion state, chromatographic fingerprint, saturated hydrocarbon, olefin, aromatic hydrocarbon, exhaust gas

CLC Number:

TE357

Liu Qicheng, Yan Hongxing, Yang Junyin, Yang Pengcheng, Zhang Chonggang. A Method to Identify the Combustion State Based on Characteristics of Chromatographic Fingerprint of Fluid Generated From In-situ Combustion of Heavy Oil[J]. Special Oil & Gas Reservoirs, 2021, 28(5): 140-145.

References

[1] 张方礼.火烧油层技术综述[J].特种油气藏,2011,18(6):1-6.
ZHANG Fangli.An overview of in situ combustion technology[J].Special Oil & Gas Reservoirs,2011,18(6):1-6.
[2] 关文龙,席长丰,陈亚平,等.稠油油藏注蒸汽开发后期转火驱技术[J].石油勘探与开发,2011,38(4):452-461.
GUAN Wenlong,XI Changfeng,CHEN Yaping,et al.Fire-flooding technologies in post-steam-injected heavy oil reservoirs[J].Petroleum Exploration and Development,2011,38(4):452-461.
[3] 关文龙,吴淑红,梁金中,等.从室内实验看火驱辅助重力泄油技术风险[J].西南石油大学学报(自然科学版),2009,31(4):67-72.
GUAN Wenlong,WU Shuhong,LIANG Jinzhong,et al.The research on engineering risk in combustion assisted gravity drainage based on indoor experiment[J].Journal of Southwest Petroleum University(Science & Technology Edition),2009,31(4):67-72.
[4] 彭小强,韩晓强,杨洋,等.水平井火驱辅助重力泄油燃烧状态及燃烧前缘预测[J].新疆石油地质,2020,41(2):199-203.
PENG Xiaoqiang,HAN Xiaoqiang,YANG Yang,et al.Combustion state and burning front prediction during combustion assisted gravity drainage process in horizontal wells[J].Xinjiang Petroleum Geology,2020,41(2):199-203.
[5] 刘应忠,胡士清.高3-6-18块火烧油层跟踪效果评价[J].长江大学学报(自然科学版),2009,6(1):52-56.
LIU Yingzhong,HU Shiqing.Evaluation of tracking effect of in-situ combustion in Block Gao 3-6-18[J].Journal of Yangtze University(Natural Science Edition),2009,6(1):52-56.
[6] 金兆勋.高3618块火烧油层试验效果跟踪研究[J].石油地质与工程,2011,25(5):121-123.
JIN Zhaoxun.Trace research on Block Gao 3618 in-situ combustion testing effect[J].Petroleum Geology & Engineering,2011,25(5):121-123.
[7] 关文龙,马德胜,梁金中,等.火驱储层区带特征实验研究[J].石油学报,2010,31(1):100-104.
GUAN Wenlong,MA Desheng,LIANG Jinzhong,et al.Experimental research on thermodynamic characteristics of in-situ combustion zones in heavy oil reservoir[J].Acta Petrolei Sinica,2010,31(1):100-104.
[8] 何继平,刘静,牛丽,等.气相色谱法分析火驱产出气[J].石油与天然气化工,2010,39(4):352-353.
HE Jiping,LIU Jing,NIU Li,et al.Analysis of the production gas of combustion driving by gas chromatography[J].Chemical Engineering of Oil and Gas,2010,39(4):352-353.
[9] 程宏杰,顾鸿君,刁长军,等.注蒸汽开发后期稠油油藏火驱高温燃烧特征[J].成都理工大学学报(自然科学版),2012,39(4):426-429.
CHENG Hongjie,GU Hongjun,DIAO Changjun,et al.Research on high temperature combustion properties in heavy oil reservoir in the late period of steam injection development[J].Chengdu University of Technology(Science & Technology Edition),2012,39(4):426-429.
[10] 杨智,廖静,高成国,等.红浅1井区直井火驱燃烧区带特征[J].大庆石油地质与开发,2019,38(1):89-93.
YANG Zhi,LIAO Jing,GAO Chengguo,et al.Characteristics of the in-situ-combustion zone for the vertical well in Well Block HQ1[J].Petroleum Geology & Oilfield Development in Daqing,2019,38(1):89-93.
[11] 黄第藩,李晋超.利用气相色谱资料探讨几种成油生源构成[J].石油与天然气地质,1982,3(3):251-259.
HUANG Difan,LI Jinchao.A study on the structures of biogenetic substance in disseminated hydrocarbons by gas chromatograms[J].Oil & Gas Geology,1982,3(3):251-259.
[12] 林玉祥,朱传真,赵承锦,等.论油气地表化探烯烃异常成因机制及其意义——以塔里木盆地库车坳陷米斯布拉克地区为例[J].地球化学,2016,45(2):133-141.
LIN Yuxiang,ZHU Chuanzhen,ZHAO Chengjin,et al.Study on genetic mechanism and significance of olefin anomaly in surface geochemical prospecting for oil and gas:taking the Meath Braque Area of Kuqa Depression in Tarim Basin as an example[J].Geochimica,2016,45 (2):133-141.
[13] 李婧婧,汤达祯,许浩,等.准南大黄山芦草沟组油页岩热解气相色谱特征[J].石油勘探与开发,2008,35(6):674-679.
LI Jingjing,TANG Dazhen,XU Hao,et al.Pyrolysis-gas chromatography of the oil shale in Lucaogou Formation,Dahuangshan,Southern Junggar Basin[J].Petroleum Exploration and Development,2008,35(6):674-679.
[14] 陈琰,包建平,刘昭茜,等.甲基菲指数及甲基菲比值与有机质热演化关系——以柴达木盆地北缘地区为例[J].石油勘探与开发,2010,37(4):508-512.
CHEN Yan,BAO Jianping,LIU Zhaoqian,et al.Relationship between methylphenanthrene index,methylphenanthrene ratio and organic thermal evolution:take the northern margin of Qaidam Basin as an example[J].Petroleum Exploration and Development,2010,37(4):508-512.