多孔介质对注CO2原油相态影响实验及表征

doi:10.13809/j.cnki.cn32-1825/te.2020.03.003

摘要/Abstract

摘要：

低渗致密油藏中,多孔介质对原油流体相态影响不可忽略。针对致密油藏CO₂驱过程中多孔介质对原油流体相态的影响问题,建立了基于全直径岩心夹持器的多孔介质中流体相态实验方法,开展了不同溶解气量、不同渗透率条件下PVT筒及多孔介质中流体相态实验。研究结果表明,多孔介质中原油泡点压力要低于PVT筒中实测值,且随着CO₂溶解气量或渗透率的减小,泡点压力降低幅度增大。基于室内实验结果,将原油中烃类组分分子直径与储层岩心平均孔道直径比例引入到a（T）函数中,对SRK状态方程进行修正,建立了一种多孔介质中流体相态参数预测方法,模拟结果与实验值吻合较好,修正并建立了多孔介质中流体状态方程及相态表征方法。

关键词: CO₂原油体系, 相态, 多孔介质, 预测模型, 修正状态方程

Abstract:

In tight reservoirs with low permeability, the effect of porous media on fluid phase behavior can not be ignored. Therefore, the experiments of fluid phase behavior in PVT cylinder and porous media at different conditions of the dissolution gas and the permeability values are established based on full diameter core holder. The results show that the bubble point pressure of crude oil in porous media is lower than that in PVT cylinder. The difference between these two conditions become more evident as the dissolution gas volume becomes lower or the permeability becomes smaller. Based on the above results, the specific value of the diameter of hydrocarbon components and the average diameter of rock pore space is introduced into the function a（T）, modifying the classic SRK EOS equation and proposing the prediction model to calculate the parameters of crude oil in porous media. The simulation results are in good agreement with the experimental data. Furthermore, the EOS and characterized method are modified and established.

Key words: CO₂ and crude oil, phase behavior, porous media, prediction model, modified EOS

中图分类号:

TE357

姜颜波. 多孔介质对注CO₂原油相态影响实验及表征[J]. 油气藏评价与开发, 2020, 10(3): 23-27.

Yanbo JIANG. Experiment and characterization on phase behavior of CO₂ and crude oil in porous media[J]. Reservoir Evaluation and Development, 2020, 10(3): 23-27.

图/表 10

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参考文献 24

[1]	徐梦雅, 廖新维, 何逸凡, 等. 完井方式对致密气藏压裂水平井产能的影响[J]. 油气地质与采收率, 2012,19(2):67-71.
	XU M Y, LIAO X W, HE Y F, et al. Study on productivity analysis of fractured horizontal wells based on different completion methods in tight gas reservoir[J]. Petroleum Geology and Recovery Efficiency, 2012,19(2):67-71.
[2]	LEE S T. Capillary-gravity equilibria for hydrocarbon fluids in porous media[C]// paper SPE-19650-MS presented at the SPE Annual Technical Conference and Exhibition, 8-11 October 1989, San Antonio, Texas, USA.
[3]	BRUSILOVSKY A I. Mathematical simulation of phase behavior of natural multicomponent systems at high pressures with an equation of state[J]. SPE Reservoir Engineering, 1992,7(1):117-122. doi: 10.2118/20180-PA
[4]	阎庆来, 何秋轩, 刘易非. 凝析油气在多孔介质中的相变特征[J]. 西安石油大学学报:自然科学版, 1988,3(2):15-22.
	YAN Q L, HE Q X, LIU Y F. Phase transition characteristics of condensate oil and gas in porous media[J]. Journal of Xi’an Shiyou University(Natural Science), 1988,3(2):15-22.
[5]	郭平, 孙良田, 孙雷. 多孔介质毛细管压力对凝析油气相态影响研究[J]. 石油勘探与开发, 1994,21(4):64-69.
	GUO P, SUN L T, SUN L. A theoretical study of the effect of capillary pressure of porous media on the phase state of a condensate[J]. Petroleum Exploration and Development, 1994,21(4):64-69.
[6]	王志伟, 李相方, 程时清, 等. 多孔介质凝析气相变的影响因素[J]. 天然气工业, 2006,26(1):90-92.
	WANG Z W, LI X F, CHENG S Q, et al. Influential factors on phase change of condensate gas in porous media[J]. Natural Gas Industry, 2006,26(1):90-92.
[7]	王志伟, 李相方. 凝析气相变微观孔隙模型实验研究[J]. 工程热物理学报, 2006,27(2):251-254.
	WANG Z W, LI X F. Experiments on phase change of gas condensate in microcosmic porous model[J]. Journal of Engineering Thermophysics, 2006,27(2):251-254.
[8]	唐蜜, 杜建芬. 多孔介质对原油泡点影响的实验研究[J]. 重庆科技学院学报:自然科学版, 2010,12(2):57-59.
	TANG M, DU J F. Influence experimental study of porous media on crude oil bubble point[J]. Journal of Chongqing University of Science and Technology(Natural Sciences Edition), 2010,12(4):57-59.
[9]	DIDAR B R, AKKUTLU I Y. Pore-size dependence of fluid phase behavior and properties in organic-rich shale reservoirs[C]// paper SPE-164099-MS presented at the SPE International Symposium on Oilfield Chemistry, 8-10 April 2013, The Woodlands, Texas, USA.
[10]	LUO S, LUTKENHAUS J L, NASRABADI H. Experimental study of confinement effect on hydrocarbon phase behavior in nano-scale porous media using differential scanning calorimetry[C]// paper SPE-175095-MS presented at the SPE Annual Technical Conference and Exhibition, 28-30 September 2015, Houston, Texas, USA.
[11]	ALFI M, NASRABADI H, BANERJEE D. Experimental investigation of confinement effect on phase behavior of hexane, heptane and octane using lab-on-a-chip technology[J]. Fluid phase Equilibria, 2016,423:25-33. doi: 10.1016/j.fluid.2016.04.017
[12]	DIDAR B R, AKKUTLU I Y. Confinement effects on hydrocarbon mixture phase behavior in organic nanopore[C]// paper URTEC-2151854-MS presented at the Unconventional Resources Technology Conference, 20-22 July 2015, San Antonio, Texas, USA.
[13]	LI L, SHENG J J. Nanopore confinement effects on phase behavior and capillary pressure in a Wolfcamp shale reservoir[J]. Journal of the Taiwan Institute of Chemical Engineers, 2017,78:317-328. doi: 10.1016/j.jtice.2017.06.024
[14]	YANG Y, LUN Z M, WANG R, et al. Non-equilibrium phase behavior in gas condensation depletion experiments[J]. Fluid Phase Equilibria, 2020,506:1-9.
[15]	谷江锐, 刘岩. 国外致密砂岩气藏储层研究现状和发展趋势[J]. 国外油田工程, 2009,25(7):1-5.
	GU J R, LIU Y. Present study and development trend of foreign tight gas sandstone reservoirs[J]. Foreign Oil Field Engineering, 2009,25(7):1-5.
[16]	LARSEN A, URKEDAL H, LONOY A. Fluid pressure gradients in tight formations[C]// paper SPE-121982-MS presented at the EUROPEC/EAGE Conference and Exhibition, 8-11 June 2009, Amsterdam, The Netherlands 2009, Amsterdam, The Netherlands.
[17]	KABIR S, RASDI F, IGBOALISI B O. Analyzing production data from tight oil wells[J]. Journal of Canadian Petroleum Technology, 2011,50(5):48-58.
[18]	魏海峰, 凡哲元, 袁向春. 致密油藏开发技术研究进展[J]. 油气地质与采收率, 2013,20(2):62-66.
	WEI H F, FAN Z Y, YUAN X C. Research progress of tight reservoir development technology[J]. Petroleum Geology and Recovery Efficiency, 2013,20(2):62-66.
[19]	ARSHAD A, AL MAJED A A, MENOUAR H, et al. Carbon dioxide （CO₂） miscible flooding in tight oil reservoirs: A case study[C]// paper SPE-127616-MS presented at the Kuwait International Petroleum Conference and Exhibition, 14-16 December 2009, Kuwait City, Kuwait.
[20]	廉黎明, 秦积舜, 刘同敬, 等. 修正混合规则的BWRS型状态方程及其在CO₂原油体系相态计算中的应用[J]. 中国石油大学学报:自然科学版, 2013,37(2):81-88.
	LIAN L M, QIN J S, LIU T J, et al. A BWRS type EOS based on modified mixing-rule and its application in phase behavior of CO₂-crude system[J]. Journal of China University of Petroleum(Edition of Natural Science), 2013,37(2):81-88.
[21]	王宁, 高东, 文斌, 等. 致密油藏开发特征及开发技术分析[J]. 石油化工应用, 2016,35(3):15-18.
	WANG N, GAO D, WEN B, et al. Development characteristic and technique analysis of tight oil reservoir[J]. Petrochemical Industry Application, 2016,35(3):15-18.
[22]	严向阳, 李楠, 王腾飞, 等. 美国致密油开发关键技术. 科学导报, 2015,33(9):100-107.
	YAN X Y, LI N, WANG T F, et al. Key technologies for tight oil development in the United States[J]. Science & Technology Review, 2015,33(9):100-107.
[23]	SHENG J J. Critical review of field EOR projects in shale and tight reservoirs[J]. Journal of Petroleum Science and Engineering, 2017, (159):654-665.
[24]	杜金虎, 刘合, 马德胜, 等. 试论中国陆相致密油有效开发技术[J]. 石油勘探与开发, 2014,41(2):198-205.
	DU J H, LIU H, MA D S, et al. Discussion on effective development techniques for continental tight oil in China[J]. Petroleum Exploration and Development, 2014,41(2):198-205.

泡点压力/ MPa	溶解气量/（m³·m^-3）	体积系数	原油密度/ （g·cm^-3）	原油黏度/（mPa·s）
18.00	95.81	1.33	0.723 5	1.729 4
16.50	73.46	1.25	0.760 2	1.756 5
12.37	52.71	1.22	0.770 1	1.884 4
10.84	33.65	1.17	0.791 6	2.153 8
8.50	18.78	1.14	0.807 1	2.464 9

岩心编号	渗透率/10^-3μm²	长度/mm	直径/mm	孔隙体积/mL
1	0.5	51.18	99.70	48.457
2	1.0	49.96	100.46	61.240
3	3.4	63.00	98.94	61.899

组份	分子量	相对密度	临界温度/K	临界压力/MPa	偏心因子	临界偏差因子	摩尔组成
CO₂	44.01	0.300 0	304.20	7.280	0.225 0	0.274 0	0.342 0
C₁	16.04	0.300 0	190.60	4.540	0.008 0	0.288 0	0.082 4
C₂	30.07	0.350 0	305.40	4.820	0.098 0	0.285 0	0.037 0
C₃	44.10	0.350 0	369.80	4.190	0.152 0	0.281 0	0.044 5
iC₄	58.12	0.350 0	408.10	3.600	0.176 0	0.283 0	0.008 7
nC₄	58.12	0.350 0	425.20	3.750	0.193 0	0.274 0	0.014 9
iC₅	72.15	0.400 0	460.40	3.340	0.227 0	0.271 0	0.009 0
nC₅	72.15	0.400 0	469.60	3.330	0.251 0	0.262 0	0.005 0
C₆	84.00	0.685 0	512.00	3.297	0.296 0	0.260 0	0.019 0
CN₊₁	141.97	0.797 7	628.91	2.592	0.431 1	0.256 5	0.251 6
CN₊₂	277.82	0.864 3	779.18	1.456	0.807 4	0.226 4	0.127 4
CN₊₃	491.28	0.926 2	929.36	0.790	1.256 1	0.190 5	0.058 5
总计							1.000 0

饱和原油样品	K/10^-3μm²	T/K	泡点- 实验值/MPa	泡点- 模拟值/MPa	误差/ %
HH（饱和CO₂）	3.4	338.15	17.16	17.31	0.87
HH（饱和CO₂）	1.0	338.15	16.87	16.91	0.24
HH（饱和CO₂）	0.5	338.15	16.55	16.69	0.85

多孔介质对注CO₂原油相态影响实验及表征

Experiment and characterization on phase behavior of CO₂ and crude oil in porous media

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