低渗储层有效喉道半径下限研究:以苏北盆地高邮凹陷沙埝南地区为例Cutoff Value of Effective Throat Radius in Low Permeability Reservoir:An Example of South Shanian Area in Gaoyou Depression,Subei Basin
张创;孙卫;解伟;
摘要(Abstract):
针对前人研究较少的储层有效喉道半径下限的影响因素,以苏北盆地高邮凹陷沙埝南地区阜三段储层为研究对象,利用常规压汞和恒速压汞方法对其进行研究,并对其在低渗储层中的特殊性进行了探讨。研究发现,有效喉道半径下限并非一个定值,而是随渗透率增大而提高;在孔喉特征参数中,其随喉道半径增大、分选变差(分选系数、变异系数增大)而提高;其与平均喉道半径的相关性(R2=0.9659)好于与最大连通喉道半径的相关性(R2=0.8796);当有效喉道半径下限<1.5μm时,其值随均质系数增大而减小,当有效喉道半径下限>1.5μm时,其与均质系数无明显关系。对于低渗储层而言,随着储层岩石中粗大喉道数量增多、半径增大,喉道间的非均质性变强,有效喉道半径下限也随之提高。
关键词(KeyWords): 有效喉道半径下限;孔隙结构;毛管压力曲线;恒速压汞;低渗储层
基金项目(Foundation): 国家科技支撑计划项目“低(超低)渗透油田高效增产改造和提高采收率技术与产业化示范”(2007BAB17B00)
作者(Author): 张创;孙卫;解伟;
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DOI:
参考文献(References):
- [1]吕鸣岗,毕海滨.用毛管压力曲线确定原始含油饱和度[J].石油勘探与开发,1996,23(5):63-67.
- [2]周灿灿,刘堂晏,马在田,等.应用球管模型评价岩石孔隙结构[J].石油学报,2006,27(1):92-96.
- [3]Bryant S L,Cade C,Mellor D W.Permeability predication fromgeological models[J].AAPG Bulletin,1993,77(8):1338-1350.
- [4]Yiotis A G,Stubos A K,Boudouvis A G,et al.Pore-net workmodeling of isothermal drying in porous media[J].TransportPorous Med,2005,58(1/2):63-86.
- [5]Pereira G G,Pinczewski W V,Chan D Y C,et al.Pore scalenetwork model for drainage dominated three-phase flow in por-ous media[J].Transport Porous Med,1996,24(2):157-166.
- [6]Adler P M,Jacquin C C,Quiblier J A.Flow in simulated por-ous media[J].Int.J.Multiphase Flow,1990,16(4):691-712.
- [7]Silin D B,Jin Guodong,Patzek T W.Robust Determination ofthe Pore-Space Morphology in Sedimentary Rocks[J].SPE84296,2003:1-15.
- [8]Chawla N,Sidhu R S,Ganesh V.Three-dimensional visualiza-tion and microstructure-based modeling of deformation in parti-cle-reinforced composites[J].Acta Materialia,2006,54(6):1541-1546.
- [9]Arns C H,Bauget F,Limaye A,et al.Pore-scale characteriza-tion of carbonates using X-ray microtomography[J].SPEJournal,2005,10(4):475-484.
- [10]Turner M L,Knung L,Arns C H,et al.Three dimensional im-aging of multiphase flow in porous media[J].Physica A,2004,33(9):166-172.
- [11]Sun W,Qu Z H,Tang G Q.Characterization of water injectionin low permeability rock using sandstone micromodels[J].Journal of Petroleum Technology,2004,56(5):71-72.
- [12]Pittman E D.Relationship of porosity and permeability to vari-ous parameters derived from mercury injection:Capillary pres-sure curves for sandstone[J].AAPG Bulletin,1992,176(2):191-198.
- [13]张龙海,周灿灿,刘国强,等.孔隙结构对低孔低渗储集层电性及测井解释评价的影响[J].石油勘探与开发,2006,33(6):671-676.
- [14]谢丛姣,关振良,姜山.基于微观随机网络模拟法建立的储层孔隙结构模[J].地质科技情报,2005,24(2):97-100.
- [15]关振良,谢丛姣,董虎,等.多孔介质微观孔隙结构三维成像技术[J].地质科技情报,2009,28(2):115-121.
- [16]罗蛰潭,王允诚.油气储集层的孔隙结构[M].北京:石油工业出版社,1986:114-123.
- [17]蔡忠.储集层孔隙结构与驱油效率关系研究[J].石油勘探与开发,2000,27(6):45-49.
- [18]高旺来.安塞低渗油田孔隙结构对渗流特征曲线的影响[J].石油勘探与开发,2003,30(1):79-80.
- [19]张大伟,陈发景,程刚.松辽盆地大情字井地区高台子油层储集层孔隙结构的微观特征[J].石油与天然气地质,2006,27(5):668-674.
- [20]熊敏,王勤田.盘河断块区孔隙结构与驱油效率[J].石油与天然气地质,2003,24(1):42-45.
- [21]王夕宾,刘玉忠,钟建华.乐安油田草13断块沙四段储集层微观特征及其与驱油效率的关系[J].石油大学学报:自然科学版,2005,29(3):6-11.
- [22]王瑞飞,陈明强,孙卫.鄂尔多斯盆地延长组超低渗透砂岩储层微观孔隙结构特征研究[J].地质论评,2008,54(2):270-278.
- [23]沈平平.油水在多孔介质中的运动理论和实践[M].北京:石油工业出版社,2000:17-18.
- [24]杨正明,张英芝,郝明强,等.低渗透油田储层综合评价方法[J].石油学报,2006,27(2):64-67.
- [25]Morrow W N.Physics and thermodynamics of capillary actionin porous media[J].Industrial and Engineering Chemistry Re-search,1970,63:32-56.
- [26]Hooper E.Fluid migration along growth fault in compactingsediments[J].Journal of Petroleum Geology,1991,14(2):160-190.
- [27]Jerauld G R,Scriven L E,Davis H T.Percolation and conduc-tion on the 3Dvoronoi and regular networks:a second casestudy in topological disorder[J].Journal of Physical Chemis-try,1984,17:3429-3439.
- [28]Heiba A A,Sahimi M,Muhammad L E.Percolation theory oftwo-phase relative permeability[J].SPE11015,198.