基于各向异性致密砂岩油地震岩石物理模型的脆性指数研究(英文)
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摘要
致密砂岩油储层的脆性研究是致密砂岩油地震预测的重要内容,需要引入合适的脆性指数来建立致密砂岩油储层的脆性评价标准。本文首先构建了各向异性致密砂岩油地震岩石物理模型;依据该模型进行了各向异性介质弹性常数的脆性敏感性分析,建立了新的脆性指数;并分别从脆性敏感性定量分析、岩石物理响应特征分析以及交汇图分析三个方面系统研究了新脆性指数在致密砂岩油脆性预测上的适用性。分析结果表明,新脆性指数较其它传统脆性指数,不仅其脆性敏感性高,而且更适合于致密砂岩油储层"甜点"区的脆性预测。
Brittleness analysis becomes important when looking for sweet spots in tightoil sandstone reservoirs. Hence, appropriate indices are required as accurate brittleness evaluation criteria. We construct a seismic rock physics model for tight-oil sandstone reservoirs with vertical fractures. Because of the complexities in lithology and pore structure and the anisotropic characteristics of tight-oil sandstone reservoirs, the proposed model is based on the solid components, pore connectivity, pore type, and fractures to better describe the sandstone reservoir microstructure. Using the model, we analyze the brittleness sensitivity of the elastic parameters in an anisotropic medium and establish a new brittleness index. We show the applicability of the proposed brittleness index for tight-oil sandstone reservoirs by considering the brittleness sensitivity, the rock physics response characteristics, and cross-plots. Compared with conventional brittleness indexes, the new brittleness index has high brittleness sensitivity and it is the highest in oil-bearing brittle zones with relatively high porosity. The results also suggest that the new brittleness index is much more sensitive to elastic properties variations, and thus can presumably better predict the brittleness characteristics of sweet spots in tight-oil sandstone reservoirs.
引文
Ba,J.,Carcione,J.M.,and Nie,J.X.,2011,Biot-Rayleigh theory of wave propagation in double-porosity media:Geophys.Res.,116,B06202.
    Ba,J.,Cao,H.,Yao,F.C,Nie,J.X.,and Y,H.Z.,2008,Double-porosity rock model and squirt flow in the laboratory frequency band:Applied Geophysics,5(4),261-276.
    Berryman,J.G.,1995,Mixture theories for rock properties,in Washington,D.C.Ed.,a handbook of physical constants:American Geophysical Union,205-228.
    Berryman,J.G.,1980,Long-wavelength propagation in composite elastic media:The Journal of the Acoustical Society of America,68(6),1820-1831.
    Brown,R.,Korringa,J.,1975,On the dependence of the elastic properties of a porous rock on the compressibility of the pore fluid:Geophysics,40(4),608-616.
    Cai,B.,Ding,Y.H.,Lu,Y J.,Wang,X.D.,Yang,Z.D.,Sun,H.,and Wu,G.H.,2012,Study of Rock Brittleness for Stimulated Reservoir Volume Fracture Technology:Journal of Chongqing University of Science and Technology(National Sciences Edition)(in Chinese),14(5),86-88.
    Chen,J.J.,Zhang,G.Z.,Chen,H.Z.,and Yin,X.Y,2014,The construction of Shale rock physics effective model and prediction of rock brittleness:84th A Ann.Internat Mtg.,Soc.of Expl.Geophys.,Expanded Abstract,2861-2865.
    Diao,H.Y,2013,Rock mechanical properties and brittleness evaluation of shale reservoir:Acta Petrologica Sinica(in Chinese),29(9),3300-3306.
    Fu,J.H.,Deng,X.Q.,Zhang,X L.,Luo,A.X.,and Nan,Q.X.,2013,Relationship between deepwater sandstone and tight oil of the Triassic Yanchang Formation in Ordos Basin:Journal of Palaeogeography(in Chinese),15(5),0624-0634.
    Guo,Z.Q.,Chapman,M.,and Li,X.Y,2012a.,A shale rock physics model and its application in the predictin of brittleness index,mineralogy,and porosity of the Barnet Shale:82nd A Ann.Internat Mtg.,Soc.of Expl.Geophys.,Expanded Abstract,1-5.
    Guo,Z.Q.,Chapman,M.,and Li,X.Y,2012b,Exploring the effect of fractures and microstructure on brittleness index in the Barnett Shale:82nd A Ann.Internat Mtg.,Soc.of Expl.Geophys.,Expanded Abstract,1-5.
    Goodway,B.,Perez,M.,Varsek,I,and Abaco,C,2010,Seismic petrophysics and isotropic-anisotropic AVO methods for unconventional gas exploration:The Leading Edge,29(12),1500-1508.
    Grieser,B.,and Bray,J.,2007,Identification of production potential in unconventional reservoirs:Proceedings of the Annual Technical Conference and Exhibition,Society of Petroleum Engineers,SPE 106623.
    Gassmann,F.,1951,Uber die Elastizita porooser Mddien:Vier.der Natur.Gesellschaft in Zurich,96,1-23.
    Jia,C.Z.,Zhou,C.N.,Li,J.Z.,Li,D.H.,Z,M.,2012,The evaluation standard,main types,basic characteristics and resources Prospect of the china's tight oil:Acta Petrolei Sinica(in Chinese),33(3),343-340
    Kuster,G.T.,and Toksoz,M.N.,1974,Velocity and attenuation of seismic waves in two phase media:Part 1,Theoretical formulation:Geophysics,39(5),587-606.
    Li,Z.P.,H,F.Y,He,X.W.,Zang,W.L.,and He,Y T,.2014,Shale-gas reservoir-prediction study in Daanzhai,Eastern Sichuan Basin:The Leading Edge,526-534.
    Mavko,G.,T.Mukerji,and J.Dvorkin,2009,The rock physics handbook:Tools for seismic analysis of porous media.:Cambridge University Press.
    Perez,R.,and Marfurt,K.,2013,Brittleness estimation from seismic measurements in unconventional reservoirs:Application to the Barnett Shale:83rd A Ann.Internat Mtg.,Soc.of Expl.Geophys.,Expanded Abstract,2258-2263.
    Ruiz,F.,and Azizov,I.,2011,Fluid substitution in tight shale using the soft-porosity model:81~(st)A Ann.Internat Mtg.,Soc.of Expl.Geophys.,Expanded Abstract,2272-2276.
    Ruiz,F.,and Cheng,A.,2010,A rock physics model for tight gas sand:The Leading Edge,1484-1489.
    Rickman,R.,Mullen,M.,Petre,E.,Grieser,B.,and Kundert,D.,2008,A Practical Use of Shale Petrophysics for Stimulation Design Optimization:All Shale Plays Are Not Clones of the Barnett Shale:Proceedings of the Annual Technical Conference and Exhibition,Society of Petroleum Engineers,SPE 115258.
    Sharma,R.,and Chopra,S.,2012,New attribute for determination of lithology and brittleness:82nd A Ann.Internat Mtg.,Soc.of Expl.Geophys.,Expanded Abstract,1-5.
    Sun,C.Y.,2007,Theory and Methods of Seismic Waves.Dong Ying:China University of Petroleum of Press.
    Tian,J.F.,Gao,Y L.,Zhang,P.B.,Wang,X.I,and Yang,Y Y,2013,Genesis of illite in Chang 7 tight oil reservoir in Heshui area,Ordos Basin:Oil&Gas Geology(in Chinese),34(5),700-707.
    Wang,P.,Wu,G.C,Dai,R.H.,and Zhang,W.X.,2014,A new rock physics model for tight reservoirs:84th A Ann.Internat Mtg.,Soc.of Expl.Geophys.,Expanded Abstract,2931-2935.
    Wu,G.C,2006,Seismic wave propagation and imaging of anisotropic medium.Dong Ying:China University of Petroleum of Press,Dongying,Shangdong.
    Xu,S.,White,R.E.,1996,A physical model for shearwave velocity prediction:Geophysical Prospecting,44(5),687-717.
    Yang,R.Z.,Zhao,Z.G.,Pang,H.L.,Li,C.C,and Chou,N.G.,2012,The controlling factors and the methods of earthquake prediction of the geological enrichment zone of shale gas:Earth Science Frontiers,19(5),339-347.
    Zhou,F.,Ma,Z.,and Li,C,2014,An effective model for tight gas sands:CPS/SEG Beijing 2014 International Geophysical Conference,993-995.
    Zhou,S.S.,Yi,W.,Hao,Z.B.,Huang,W.Q.,and Wu,X.Y.,2012,Experiment research and application of fluid sensitive attribute based on the prestack inversion:Chinese J.Geophys(in Chinese),55(6),1985-1992.
    Zhu,R.K.,Bai,B.,et al.,2013,Research advances of microstructure in unconventional tight oil and gas reservoir:Journal of Palaeogeography(in Chinese),15(5),615-623.

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