页岩油藏油气两相流动模型及其对油藏开发的启示

doi:10.7623/syxb202302010

石油学报 ›› 2023, Vol. 44 ›› Issue (2): 348-357.DOI: 10.7623/syxb202302010

页岩油藏油气两相流动模型及其对油藏开发的启示

夏阳¹, 金衍¹, 陈康平², 韦世明¹

1. 中国石油大学(北京)油气资源与探测国家重点实验室北京 102249;
2. 亚利桑那州立大学美国亚利桑那州 85287-6101

收稿日期:2021-09-01 修回日期:2022-07-14 出版日期:2023-02-25 发布日期:2023-03-08
通讯作者: 夏阳,男,1991年3月生,2018年获中国石油大学(北京)博士学位,现为中国石油大学(北京)副教授,主要从事页岩油气岩石力学研究工作。
作者简介:夏阳,男,1991年3月生,2018年获中国石油大学(北京)博士学位,现为中国石油大学(北京)副教授,主要从事页岩油气岩石力学研究工作。Email:xiayang@vip.126.com
基金资助:
国家自然科学基金企业创新发展联合基金项目(No.U19B6003)和国家自然科学基金青年科学基金项目(No.51904318)资助。第一作者及

The oil-gas two-phase flow model for shale reservoirs and its enlightenment to reservoir development

Xia Yang¹, Jin Yan¹, Chen Kangping², Wei Shiming¹

1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;
2. Arizona State University, Arizona 85287-6101, USA

Received:2021-09-01 Revised:2022-07-14 Online:2023-02-25 Published:2023-03-08

摘要/Abstract

摘要： 页岩油藏开采中若井底压力低于饱和压力,储层压力下降会导致溶解气变为游离气,使储层流体流动规律复杂,因此油井产能预测需要考虑早期溶解气驱的影响。国内外相关研究尚未阐明原油依靠游离气泡膨胀流动的本质规律。基于流体自扩散模型,考虑储层压力衰减导致溶解气析出建立自扩散两相流动数学模型,初步表征了储层压力衰减与溶解气驱油的耦合扩散流动过程。通过与已有实验数据对比,论证了模型的合理性。在自扩散主导的致密页岩油藏一次开采流动中,随着溶解气析出变为游离气且原油含气饱和度增大,游离气泡膨胀驱动原油流动的能力不断增强。重点分析了原油泡点压力与溶解气油比对页岩油流动的影响,发现在相同生产条件下更高的原油泡点压力与溶解气油比可显著提高原油中游离气的饱和度,流动中更多原油被膨胀的气泡"挤"出,原油产量更高。最后探讨了研究结论对页岩油藏开采的启示。

关键词: 页岩油, 自扩散, 两相流, 模型研究, 流动机理

Abstract: When the bottom hole pressure is lower than the saturation pressure in the exploitation of shale reservoir, the dissolved gas turns into free gas due to reservoir pressure depletion, and the flow law of reservoir fluids becomes more complex. Thus, the influence of dissolved gas drive in the early stage should be considered in oil production prediction. The essential law of oil flow relying on the expansion of free bubbles has not been clarified in previous domestic and foreign researches. Based on the fluid self-diffusion model, a mathematical model of self-diffused two-phase flow has been established considering the release of dissolved gas due to reservoir pressure depletion, by which the coupling diffusion-flow process jointly controlled by reservoir pressure depletion and dissolved oil drive is characterized. Then the model is verified by comparing the results with existing experimental data. In the process of oil flow during the primary exploitation of tight shale reservoirs dominated by self-diffusion, the flow capacity of oil driven by gas expansion is increased with the formation of free gas released from dissolved gas and the increase of gas saturation in crude oil. Through analyzing the influence of bubble point pressure and dissolved gas-oil ratio on oil flow, it is found that under the same production conditions, the higher bubble point pressure or dissolved gas-oil ratio can significantly improve the gas saturation in crude oil, so that a larger amount of oil can be squeezed out, thus increasing oil output. Finally, according to research results, reasonable suggestions are proposed for exploitation of shale reservoir.

Key words: shale oil, self-diffusion, two-phase flow, model study, flow mechanism

中图分类号:

TE312

夏阳, 金衍, 陈康平, 韦世明. 页岩油藏油气两相流动模型及其对油藏开发的启示[J]. 石油学报, 2023, 44(2): 348-357.

Xia Yang, Jin Yan, Chen Kangping, Wei Shiming. The oil-gas two-phase flow model for shale reservoirs and its enlightenment to reservoir development[J]. Acta Petrolei Sinica, 2023, 44(2): 348-357.

参考文献

[1] 杨雷,金之钧. 全球页岩油发展及展望[J].中国石油勘探,2019,24(5):553-559.
YANG Lei,JIN Zhijun.Global shale oil development and prospects[J].China Petroleum Exploration,2019,24(5):553-559.
[2] FAKHRY A,HOFFMAN T.The effect of mineral composition on shale oil recovery[C]//Proceedings of the Unconventional Resources Technology Conference.Houston,Texas:SEG,2018.
[3] SUHAG A,RANJITH R,AMINZADEH F.Comparison of shale oil production forecasting using empirical methods and artificial neural networks[R].SPE 187112,2017.
[4] 金之钧,王冠平,刘光祥,等.中国陆相页岩油研究进展与关键科学问题[J].石油学报,2021,42(7):821-835.
JIN Zhijun,WANG Guanping,LIU Guangxiang,et al.Research progress and key scientific issues of continental shale oil in China[J].Acta Petrolei Sinica,2021,42(7):821-835.
[5] 付锁堂,金之钧,付金华,等.鄂尔多斯盆地延长组7段从致密油到页岩油认识的转变及勘探开发意义[J].石油学报,2021,42(5):561-569.
FU Suotang,JIN Zhijun,FU Jinhua,et al.Transformation of understanding from tight oil to shale oil in the Member 7 of Yanchang Formation in Ordos Basin and its significance of exploration and development[J].Acta Petrolei Sinica,2021,42(5):561-569.
[6] FENG Q,XU S,XING X,et al.Advances and challenges in shale oil development:A critical review[J].Advances in Geo-Energy Research,2020,4(4):406-418.
[7] ALFARGE D,WEI Mingzhen,BAI Baojun.Factors affecting CO₂-EOR in shale-oil reservoirs:numerical simulation study and pilot tests[J] .Energy & Fuels,2017,31(8):8462-8480.
[8] YU Yang,SHENG J J.Experimental evaluation of shale oil recovery from eagle ford core samples by nitrogen gas flooding[R].SPE 179547,2016.
[9] 金之钧,白振瑞,高波,等.中国迎来页岩油气革命了吗?[J].石油与天然气地质,2019,40(3):451-458.
JIN Zhijun,BAI Zhenrui,GAO Bo,et al.Has China ushered in the shale oil and gas revolution?[J].Oil & Gas Geology,2019,40(3):451-458.
[10] KLINKENBERG L J.The permeability of porous media to liquids and gases[C]//Proceedings of the API Drilling and Production Practice.New York:API,1941:200-213.
[11] 冯其红,徐世乾,任国通,等.致密油多级压裂水平井井网参数分级优化[J].石油学报,2019,40(7):830-838.
FENG Qihong,XU Shiqian,REN Guotong,et al.Hierarchical optimization of well pattern parameters in multi-stage fractured horizontal well for tight oil[J].Acta Petrolei Sinica,2019,40(7):830-838.
[12] ZENG Baoquan,CHENG Linsong,LI Chunlan.Low velocity non-linear flow in ultra-low permeability reservoir[J].Journal of Petroleum Science and Engineering,2011,80(1):1-6.
[13] CHEN Kangping,SHEN Di.Drainage flow of a viscous compressible fluid from a small capillary with a sealed end[J].Journal of Fluid Mechanics,2018,839:621-643.
[14] CHEN Kangping,SHEN Di.Mechanism of fluid production from the nanopores of shale[J].Mechanics Research Communications,2018,88:34-39.
[15] CRONIN M,EMAMI-MEYBODI H,JOHNS R T.Diffusion-dominated proxy model for solvent injection in ultratight oil reservoirs[J].SPE Journal,2019,24(2):660-680.
[16] 杨胜来,魏俊之.油层物理学[M].北京:石油工业出版社,2004.
YANG Shenglai,WEI Junzhi.Reservoir physics[M].Beijing:Petroleum Industry Press,2004.
[17] LAKE L W.Enhanced oil recovery[M].Englewood:Prentice Hall,1996.
[18] JIN Yan,CHEN Kangping.Fundamental equations for primary fluid recovery from porous media[J].Journal of Fluid Mechanics,2019,860:300-317.
[19] 金衍,韦世明,陈康平,等.致密气自扩散渗流模型[J].石油学报,2020,41(6):737-744.
JIN Yan,WEI Shiming,CHEN Kangping,et al.Self-diffusion flow model of tight gas[J].Acta Petrolei Sinica,2020,41(6):737-744.
[20] KLAINERMAN S,MAJDA A.Compressible and incompressible fluids[J].Communications on Pure and Applied Mathematics,1982,35(5):629-651.
[21] CRAMER M S.Numerical estimates for the bulk viscosity of ideal gases[J].Physics of Fluids,2012,24(6):066102.
[22] JOSEPH D D,KAMP A M,KO T,et al.Modeling foamy oil flow in porous media II:nonlinear relaxation time model of nucleation[J].International Journal of Multiphase Flow,2003,29(9):1489-1502.
[23] JOSEPH D D,KAMP A M,BAI R.Modeling foamy oil flow in porous media[J].International Journal of Multiphase Flow,2002,28(10):1659-1686.
[24] SVRCEK W Y,MEHROTRA A K.Gas solubility,viscosity and density measurements for athabasca bitumen[J].Journal of Canadian Petroleum Technology,1982,21(4):PETSOC-82-04-02.
[25] SAHNI A,GADELLE F,KUMAR M,et al.2001.Experiments and analysis of heavy oil solution gas drive[R].SPE 71498,2001.
[26] 张明山.页岩油溶解气驱实验研究[D].青岛:中国石油大学(华东),2018.
ZHANG Mingshan.Experimental study on solution gas drive in shale[D].Qingdao:China University of Petroleum,2018.
[27] JONES R S JR.Producing gas-oil ratio behavior of tight oil reservoirs[R].URTEC 2460396,2016.
[28] BROOKS R H,COREY A T.Hydraulic properties of porous media[R].Hydrology Papers,1964.

页岩油藏油气两相流动模型及其对油藏开发的启示

The oil-gas two-phase flow model for shale reservoirs and its enlightenment to reservoir development

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