One Dimensional Numerical Simulation of Oil-Trapping Process of Original Lentoid Sand Reservoir
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摘要: 为了了解原生透镜状砂岩油藏的成藏过程和控制因素, 基于变形多孔介质两相流动的基本原理, 综合考虑地层在沉降过程中温度和压力的变化、砂岩体和围岩物性的变化、石油的生成以及岩石中孔隙流体物性变化等情况, 应用数值方法模拟这类油藏在一维条件下成藏的整个过程.通过成藏过程模拟和分析, 认为超压是推动流体整体运移的动力, 而对处于生油围岩中的原生透镜状砂岩油藏, 围岩和砂体间形成的毛管压力差异才是驱动石油在原生透镜状砂岩油藏中聚集的根本动力.在这类砂岩油藏成藏的过程中, 砂体的油相压力要低于与其相邻的围岩中的油相压力, 使得砂体成为石油的一个相对的低势区.原生透镜状砂岩油藏的成藏是由力平衡和物质平衡两种基本作用控制的成藏过程, 石油生成和供应量以及砂体和围岩的油相势差决定了这类油藏的含油性.Abstract: To find out the mechanism and controlling factors of the original lentoid sand reservoir, its oil-trapping process is numerically simulated on one dimensional condition based on the theory of two-phase fluid flow in compactable porous media, taking into account of its various related processes and parameters. It is ascertained that overpressure is the force of gross fluid flow out of the source rock rather than the force of oil accumulation in the lentoid sand reservoir. The fundamental force for oil accumulation in the lentoid sand reservoir is the difference of capillary pressures built up between the source rock and the reservoir. The potential of oil phase in lentoid sand reservoir is less than that in the surrounding source rock in the oiltrapping process. The oil trapping process of lentoid sand reservoir is controlled by the principles of potential balance and volume balance. The oil-bearing characteristics of the reservoir are determined by the oil volume provided and the oil phase potential difference between the source rock and the reservoir.
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图 2 目的层段含油饱和度(a)和毛管压力(b) 随时间变化
Fig. 2. Oil saturation varied (a) and capillary pressure varied (b) with time in the simulative section
图 3 目的层段油势梯度随时间变化
Fig. 3. Oil potential grads varied with time in the sirrndative section
图 4 牛庄洼陷原生岩性油藏含油性影响因素统计分析
a.油藏储层孔隙度与含油饱和度关系；b.油藏异常压力系数与油藏顶部储层毛管压力关系
Fig. 4. Statistical analysis of the influential factors on the oil-bearing characters of original lentoid sand reservoirs in Niuzhuang sag
表 1 成藏模拟中用到的各参数
Table 1. Parameters used in the simulation
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Brooks, R. H., Corey, A. T., 1966. Properties of porous media affecting fluid flow. Journal of the Irrigation and Drainage Division, 92(2): 61-88. doi: 10.1061/JRCEA4.0000425 Chen, Z.M., Zhang, Y.F., Han, Y.X., et al., 1998. A modelling experiment and mechanism analysis of oil accumulation in pod-like sand body. Petroleum Geology & Experiment, 20(2): 166-170(in Chinese with English abstract). Danesh, A., 2000. PVT and phase behaviour of petroleum reservoir fluids. Translated by Shen, P.P., Han, D. . Petroleum Industry Press, Beijing, 293(in Chinese). Dullien, F.A.L., 2001. Porous media fluid transport and pore structure. Translated by Fan, Y.P., Zhao, D.W. . Petroleum Industry Press, Beijing, 332(in Chinese). Düppenbecker, S.J., Dohmen, L., Welte, D.H., 1991. Numerical modeling of petroleum expulsion in two areas of the Lower Saxony basin, northern Germany. In: England, W.A., Fleet, A.J., eds., Petroleum migration. Geological Society Special Publication, 59: 47-64. Hermanrud, C., Wensass, L., Teige, G.M.G., et al., 1998. Shale porosities from well logs on Haltenbanken(offshore mid-Norway) show no influence of overpressuring. In: Law, B.E., Ulmishek, G.F., Slavin, V.I., eds., Abnormal pressures in hydrocarbon environments. AAPG Memoir, 70: 65-85. Li, P.L., Pang, X.Q., Chen, D.X., et al., 2004a. Oil trapping mechanism and model of sand lens reservoir of Jiyang depression. Science in China (Ser. D), 34(Suppl. 1): 143-151(in Chinese). Li, P.L., Zhang, S.W., Song, G.Q., et al., 2004b. Forming mechanism of subtle oil pools in fault basins—Taking the Jiyang depression of the Bohaiwan basin as an example. Petroleum Geology & Experiment, 26(1): 3-10 (in Chinese with English abstract). Luo, X.R., 2001. Dynamic background and conditions for petroleum primary migration. Acta Petrolei Sinica, 22 (6): 24-29(in Chinese with English abstract). Luo, X.R., Vasseur, G., 1996. Geopressuring mechanism of organic matter cracking: Numerical modeling. AAPG Bulletin, 80(6): 856-874. https://pubs.geoscienceworld.org/aapgbull/article-abstract/80/6/856/39321/Geopressuring-Mechanism-of-Organic-Matter-Cracking Mann, U., Hantschel, T., Schaefer, R.G., et al., 1997. Petroleum migration: Mechanisms, pathways, efficiencies and numerical simulations. In: Welte, D.H., Horsfield, B., Baker, D.R. eds., Petroleum and basin evolution. Springer-Verlag, Berlin Heidelberg, 403-520. Mudford, B.S., Gradstein, F.M., Katsube, T.J., et al., 1991. Modelling 1D compaction-driven flow in sedimentary basins: A comparison of the Scotian shelf, North Sea and Gulf Coast. In: England, W.A., Fleet, A.J., eds., Petroleum migration. Geological Society Special Publication, 59: 65-85. Okui, A., Siebert, R.M., Matsubayashi, H., 1998. Simulation of oil expulsion by 1-D and 2-D basin modelling—Saturation threshold and relative permeabilities of source rocks. In: Düppenbecker, S.J., Iliffe, J.E., eds., Basin modelling: Practice and progress. Geological Society Special Publications, 141: 45-72. Palciauskas, V.V., 1991. Primary migration of petroleum. In: Merrill, R.K. ed., Source and migration processes and evaluation techniques. AAPG Treatise of Petroleum Geology, Tulas, OK, 13-22. Pang, X.Q., Chen, D.X., Li, P.L., et al., 2003. Accumulation thresholds of sand lens and controlling mechanism for oil and gas distribution. Acta Petrolei Sinica, 24 (3): 38-41(in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-SYXB200303007.htm Schenk, H.J., Horsfield, B., Krooss, B., et al., 1997. Kinetics of petroleum formation and cracking. In: Welte, D. H., Horsfield, B., Baker, D.R., eds., Petroleum and basin evolution. Springer-Verlag, Berlin Heidelberg, 233-269. Shi, G.R., 1999. Petroleum basin modeling method. Petroleum Industry Press, Beijing, 215(in Chinese). Slavin, V.I., Smirnova, E.M., 1998. Abnormally high formation pressures: Origin, prediction, hydrocarbon field development, and ecological problems. In: Law, B.E., Ulmishek, G.F., Slavin, V.I., eds., Abnormal pressures in hydrocarbon environments. AAPG Memoir, 70: 105-114. Sui, F.G., 2005. Quantitative study on key control factors for reservoir formation in turbidity sand. Acta Petrolei Sinica, 26(1): 55-59(in Chinese with English abstract). Tissot, B.P., Welte, D.H., 1984. Petroleum formation and occurrence. Springer-Verlag, Berlin Heidelberg, New York, Tokyo, 699. Tokunaga, T., Hosoya, S., Tooaka, H., et al., 1998. An estimation of the intrinsic permeability of argillaceous rocks and the effects on long-term fluid migration. In: Düppenbecker, S.J., Iliffe, J.E., eds., Basin modelling: Practice and progress. Geological Society Special Publications, 141: 83-94. Ungerer, P., Besis, F., Chenet, P.Y., et al., 1984. Geological and geochemical models in oil exploration: Principles and practical examples. In: Demaison, G., Murris, R.J., eds., Petroleum geochemistry and basin evaluation. AAPG Memoir, 35: 53-57. Ungerer, P.J., Burrus, B., Dollgez, P.Y., et al., 1990. Basin evaluation by integrated two-dimensional modeling of heat transfer, fluid flow, hydrocarbon generation, and migration. AAPG Bulletin, 74(3): 309-335. https://pubmed.ncbi.nlm.nih.gov/19580590/ Wang, N., Chen, B.N., Zhai, J.F., 2001. Reservoir forming index for the lithological reservoir. Petroleum Exploration and Development, 27(6): 4-5, 8(in Chinese with English abstract). Zhang, J., Pang, X.Q., Jiang, Z.X., et al., 2006. Main accumulation controlling factors and forecast of sand lens reservoir, Dongying depression, China. Earth Science —Journalof China University of Geosciences, 31(2): 250-256(in Chinese with English abstract). https://www.researchgate.net/publication/286902030_Main_accumulation_controlling_factors_and_forecast_of_sand_lens_reservoir_Dongying_depression_China 陈章明, 张云峰, 韩有信, 等, 1998. 凸镜状砂体聚油模拟实验及其机理分析. 石油实验地质, 20(2): 166-170. https://www.cnki.com.cn/Article/CJFDTOTAL-SYSD199802013.htm Danesh, A., 2000. 油藏流体的PVT与相态. 沈平平, 韩冬, 译. 北京: 石油工业出版社, 293. Dullien, F.A.L., 2001. 现代渗流物理学. 范玉平, 赵东伟, 译. 北京: 石油工业出版社, 332. 李丕龙, 庞雄奇, 陈冬霞, 等, 2004a. 济阳坳陷砂岩透镜体油藏成因机理与模式. 中国科学(D辑), 34(Suppl. 1): 143-151. https://www.cnki.com.cn/Article/CJFDTOTAL-JDXK2004S1016.htm 李丕龙, 张善文, 宋国奇, 等, 2004b. 断陷盆地隐蔽油气藏形成机制-以渤海湾盆地济阳坳陷为例. 石油实验地质, 26(1): 3-10. https://www.cnki.com.cn/Article/CJFDTOTAL-SYSD200401001.htm 罗晓容, 2001. 油气初次运移的动力学背景与条件. 石油学报, 22(6): 24-29. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB200106004.htm 庞雄奇, 陈冬霞, 李丕龙, 等, 2003. 砂岩透镜体成藏门限及控油气作用机理. 石油学报, 24(3): 38-41. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB200303007.htm 石广仁, 1999. 油气盆地数值模拟方法. 北京: 石油工业出版社, 215. 隋风贵, 2005. 浊积砂体油气成藏主控因素的定量研究. 石油学报, 26(1): 55-59. doi: 10.3321/j.issn:0253-2697.2005.01.011 王宁, 陈宝宁, 翟建飞, 2001. 岩性油气藏形成的成藏指数. 石油勘探与开发, 27(6): 4-5, 8. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK200006001.htm 张俊, 庞雄奇, 姜振学, 等, 2006. 东营凹陷砂岩透镜体油气成藏机理及有利区预测. 地球科学—中国地质大学学报, 31(2): 250-256. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX200602015.htm -
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