张尔华,鞠林波,宋永忠,钟拥,关晓巍
ZHANG Erhua,JU Linbo,SONG Yongzhong,ZHONG Yong,GUAN Xiaowei

• 1:大庆油田有限责任公司勘探开发研究院

摘要(Abstract)：

塔里木盆地古城地区鹰山组碳酸盐岩在成岩和后成岩过程中形成了较为复杂的孔隙结构,致使其纵、横波速度等地震弹性参数不仅受孔隙度变化影响,还依赖于孔隙结构变化。通过对致密碳酸盐岩样品系统岩石物理测试,并对铸体薄片提取反映样品孔隙结构的特征比表面、平均孔喉半径等参数,定量研究了孔隙结构对岩石地震弹性性质的影响。结果表明,样品渗透率—孔隙度关系以及纵波速度—孔隙度关系受孔隙结构控制,碳酸盐岩样品纵、横波速度等地震弹性参数与反映孔隙结构特征的特征比表面、平均孔喉半径以及平均纵横比存在明显的相关性,表现为高速度样品具有低特征比表面、高平均孔喉半径特征。另外引入骨架柔韧性因子γ进行碳酸盐岩样品孔隙结构的表征,在相同孔隙度条件下,低骨架柔韧性因子的样品溶孔发育,储集层具有高速低渗的特征;高骨架柔韧性因子的样品微裂隙发育,储集层具有低速高渗的特征。研究成果可为相关储层的岩性及烃类地震检测提供依据。
Relatively complicated pore structures were formed in the diagenetic and post-diagenetic process for the carbonate rocks in Yingshan Formation of Gucheng area in Tarim Basin, which make their seismic elastic properties such as the vertical, horizontal velocity and so on not only influenced by the changes of the porosity, but also by the variance of the pore structure. Through the systematical test of the petrophysics of the tight carbonate rock samples, the parameters of the cast thin section such as the characteristic specific surface, average pore-throat radius and so forth were extracted to response the pore structure characteristics of the samples. The results show that the relationships between the sample permeability and porosity and moreover between the vertical velocity and porosity are both controlled by the pore structures, there are obvious correlation between the seismic elastic parameters i.e. the vertical, horizontal velocity and so on and the pore structure responding parameters including the characteristic specific surface, average pore-throat radius and average vertical-horizontal ratio so forth, the lower characteristic specific surface and higher average pore-throat radius are shown for the high-velocity samples. In addition, by means of introducing the frame flexibility factor(γ), the pore structures of the carbonate samples were characterized, under the condition of the same porosity, the dissolved pores with lower frame flexibility factor are well developed, the reservoirs are characterized by higher velocity and lower permeability; while for the samples with higher frame flexibility factor, the micro-fractures are well developed, the reservoirs are characterized by lower velocity and higher permeability. The study can provide evidences for the lithological and hydrocarbon seismic tests of the relative reservoirs.

关键词(KeyWords)： 孔隙结构;碳酸盐岩;岩石物理特征;鹰山组;塔里木盆地
pore structure;carbonate rock;petrophysical characteristic;Yingshan Formation;Tarim Basin

Abstract:

Keywords:

基金项目(Foundation): 中国石油天然气股份公司重大科技专项“塔东天然气成藏理论及勘探配套技术研究”(2016E-0204)

作者(Author): 张尔华,鞠林波,宋永忠,钟拥,关晓巍
ZHANG Erhua,JU Linbo,SONG Yongzhong,ZHONG Yong,GUAN Xiaowei

DOI: 10.19597/j.issn.1000-3754.201906020

参考文献(References)：

• [1]金之钧,蔡立国.中国海相油气勘探前景、主要问题与对策[J].石油与天然气地质,2006,27(6):722-727.JIN Zhijun,CAI Liguo.Exploration propects,problems and strategies of marine oil and gas in China[J].Oil & Gas Geology,2006,27(6):722-727.
• [2]马新华,杨雨,文龙,等.四川盆地海相碳酸盐岩大中型气田分布规律及勘探方向[J].石油勘探与开发,2019,46(1):1-13.MA Xinhua,YANG Yu,WEN Long,et al.Distribution and exploration direction of medium- and large-sized marine carbonate gas fields in Sichuan Basin,SW China[J].Petroleum Exploration and Development,2019,46(1):1-13.
• [3]赵文智,汪泽成,胡素云,等.中国陆上三大克拉通盆地海相碳酸盐岩油气藏大型化成藏条件与特征[J].石油学报,2012,33(增刊2):1-9.ZHAO Wenzhi,WANG Zecheng,HU Suyun,et al.Large-scale hydrocarbon accumulation factors and characteristics of marine carbonate reservoirs in three large onshore cratonic basins in China[J].Acta Petrolei Sinica,2012,33(S2):1-9.
• [4]赵宗举,范国章,吴兴宁,等.中国海相碳酸盐岩的储层类型、勘探领域及勘探战略[J].海相油气地质,2007,1(1):1-11.ZHAO Zongju,FAN Guozhang,WU Xingning,et al.Reservoir types,exploration domains and exploration strategy of marine carbonates in China[J].Marine Origin Petroleum Geology,2007,1(1):1-11.
• [5]CAMPBELL A E,STAFLEU J.Seismic modeling of an Early Jurassic,drowned carbonate platform:Djebel Bou Dahar,High Atlas,Morocco [J].AAPG Bulletin,1992,76(11) :1760-1777.
• [6]ANSELMETTI F S,EBERLI G P.Controls on sonic velocity in carbonates[J].Pure and Applied Geophysics,1993,141(2) :287-323.
• [7]ANSELMETTI F S,EBERLI G P.The velocity-deviation log:A tool to predict pore type and permeability trends in carbonate drill holes from sonic and porosity or density logs[J].AAPG Bulletin,1999,83(3) :450-466.
• [8]VERWER K,EBERLI G P,BAECHLE G,et al.Effect of carbonate pore structure on dynamic shear moduli[J].Geophysics,2010,75(1) :E1-E8.
• [9]BAECHLE G T,COLPAERT A,BAECHLE G,et al.Effects of microporosity on sonic velocity in carbonate rocks[J].The Leading Edge,2008,27(8) :1012-1018.
• [10]AGERSBORG R,JOHANSEN T A,JAKOBSEN M,et al.Effects of fluids and dual-pore systems on pressure-dependent velocities and attenuations in carbonates[J].Geophysics,2008,73(5) :N35-N47.
• [11]WEGER R J,BAECHLE G T,MASAFERRO J L,et al.Effects of pore structure on sonic velocity in carbonates[J].SEG Technical Program Expanded Abstracts,2004,23(1) :1774.
• [12]XU Shiyu,PAYNE M A.Modeling elastic properties in carbonate rocks[J].The Leading Edge,2009,28(2) :66-74.
• [13]BA Jing,CARCIONE J M,NIE Jianxin.Biot-Rayleigh theory of wave propagation in double-porosity media[J].Journal of Geophysical Research Atmospheres,2011,116(B6) :B06202.
• [14]SHARMA R,PRASAD M,BATZLE M,et al.Sensitivity of flow and elastic properties to fabric heterogeneity in carbonates[J].Geophysical Prospecting,2013,61(2) :270-286.
• [15]ASSEFA S,MCCANN C,SOTHCOTT J.Velocities of compressional and shear waves in limestones[J].Geophysical Prospecting,2003,51(1) :1-13.
• [16]BRIGAUD B,VINCENT B,CHRISTOPHE D,et al.Acoustic properties of ancient shallow-marine carbonates:Effects of depositional environments and diagenetic processes (Middle Jurassic,Paris Basin,France)[J].Journal of Sedimentary Research,2010,80(9) :791-807.
• [17]CASTELEYN L,ROBION P,COLLIN P Y,et al.Interrelations of the petrophysical,sedimento-logical and microstructural properties of the Oolithe Blanche Formation (Bathonian,saline aquifer of the Paris Basin)[J].Sedimentary Geology,2010,230(3) :123-138.
• [18]KENTER J,REINDERS M,VAN S J ,et al.Parameters controlling sonic velocities in a mixed carbonate-siliciclastics Permian shelf-margin (Upper San Andres Formation,Last Chance Canyon,New Mexico)[J].Geophysics,1997,62(2) :505-520.
• [19]WALSH J B.The effects of cracks on the compressibility of rock[J].Journal of Geophysical Research Atmospheres,1965,70(2) :381-389.
• [20]邓继新,王欢,周浩,等.龙马溪组页岩微观结构、地震岩石物理特征与建模[J].地球物理学报,2015,58(6):2123-2136.DENG Jixin,WANG Huan ,ZHOU Hao,et al.Microtextural,seismic rock physical properties and modeling of Longmaxi Formation shale[J].Chinese Journal of Geophysics,2015,58(6):2123-2136.
• [21]SUN Yuefeng.Effects of aspect ratio on wave velocities in fractured rocks[J].SEG Technical Program Expanded Abstracts,1999,16(1):925.
• [22]SUN Yuefeng.Pore structure effects on elastic wave propagation in rocks:AVO modelling[J].Journal of Geophysics & Engineering,2004,1(4):268-276.