西非深水区弱固结浊积砂岩岩石物理模型研究及其应用
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
深水浊积砂岩油气藏是当今世界油气勘探开发的热点目标,西非安哥拉深水区油气资源丰富、潜力巨大.该区第三系深水浊积砂岩埋深浅、成岩作用弱,致使地震反射纵波速度及其阻抗对有利砂岩储层和围岩的区分效果不明显;基础数据的制约如部分井声波或密度资料缺乏或存在质量问题等,给利用井震信息开展地震反演预测带来严重影响.本文旨在研究一套适合该地区储层预测的弱固结浊积砂岩岩石物理技术.为此,通过实际资料的反复论证,提出了拟合推理法确定矿物骨架弹性参数,并对等球颗粒模型进行了改进,创建了适合该地区弱固结浊积岩岩石物理模板,实现了测井曲线的合理校正和横波预测.以此为基础,进一步开展了叠前地震反演和储层的分布预测.结果表明,浊积砂储层预测精度达85%.因此,该岩石物理技术在西非深水区弱固结浊积砂岩的应用是可行的.
Deepwater turbidite sandstone reservoir is a "hot" target in today's exploration and development.In West Africa,Angola deepwater regions have rich hydrocarbon resources and huge potential.The tertiary deepwater turbidite sandstone is buried shallowly and has weak diagenesis.It is not obvious to use the seismic reflection p-wave velocity and impedance to distinguish between the favorable sandstone reservoir and their surrounding rocks.Limited by the lack of measured logs or the unreliability of the measured acoustic,shear or density in some wells,seismic inversion results can be seriously affected.The purpose of this paper is to study a set of rock physics models suitable for reservoir prediction in the region of weakly consolidated turbidite sandstone.The fitting reasoning method which consists of determining the mineral skeleton elastic parameters is introduced,the equivalent grain model is critically improved,and then rock physics templates of weakly consolidated turbidite sandstone is built for the region.Thus the logging curves can be corrected reasonably and shear wave can be predicted.Through seismic prestack inversion,the reservoir prediction accuracy of turbidite sand can be as high as85%.Therefore the proposed rock physics technology is reliable in deep weakly consolidated turbidite sandstone in West Africa.
引文
Ba J.Yan X F,Chen Z Y,et al.2013.Rock physics model and gas saturation inversion for heterogeneous gas reservoirs[J].Chinese J.Geophys.(in Chinese),56(5):1696-1706,doi:10.6038/cjg20130527.
    Bai J Y,Song Z X,Su L,et al.2012.Error analysis of shearvelocity prediction by the Xu-White model[J].Chinese J.Geophys.(in Chinese),55(2):589-595,doi:10.6038/j.issn.0001-5733.2012.02.021.
    Deng J X,Han D H,Wang S X.2011.A study of the influence of stress relaxation on the elastic properties of granular materials and the calibration of effective media model[J].Chinese J.Geophys.(in Chinese),54(4):1079-1089,doi:10.3969/j.issn.0001-5733.2011.04.023.
    Dong N,Huo Z Z,Sun Z D,et al.2014.An investigation of a new rock physics model for shale[J].Chinese J.Geophys.(in Chinese),57(6):1990-1998,doi:10.6038/cjg20140629.
    Hashin Z,Shtrikman S.1963.A variational approach to the theory of the elastic behaviour of multiphase materials[J].Journal of the Mechanics and Physics of Solids,11(2):127-140.
    He T,Shi G,ZouCC,et al.2011.The uncertainty analysis of the key factors that affect the AVO attributes in sandstone reservoir[J].Chinese J.Geophys.(in Chinese),54(6):1584-1591,doi:10.3969/j.issn.0001-5733.2011.06.018.
    Huang W Q,Hao Z B,Wu X Y.2011.A method for shear-wave velocity prediction with error correction[J].Progress in Geophys.(in Chinese),26(6):2184-2189,doi:10.3969/j.issn.1004-2903.2011.06.036.
    L(u|¨)Q B,Sun Z X.2012.Application of rockphysics chart to quantitative reservoir interpretation[J].Progress in Geophys.(in Chinese),27(2):610-618,doi:10.6038/j.issn.1004-2903.2012.02.025.
    Mavko G,Mukerji T,Dvorkin J.2009.The Rock Physics Handbook[M].2~(nd)ed.Cambridge:Cambridge University Press:458-459.
    Wang P,Zhong G F.2012.Applications of rock physics models to the deep-sea sediment drift at ODP site 1144,northern South China Sea[J].Advances in Earth Science(in Chinese),27(3):359-366.
    Wang X W,Yang W Y,Lu B,et al.2013.Grasp of the world geophysical technology development status,to promote seismic data processing and interpretation of technological progress[J].Progress in Geophys.(in Chinese),28(1):224-239,doi:10.6038/pg20130124.
    Xu Z C,L(u|¨)F L,Fan G Z,et al.2012.Deepwater petroleum geology and exploration potential of West Africa coastal basins[J].Petroleum Geology and Recovery Efficiency(in Chinese),19(5):1-5.
    Yang X J,Li J,Yu B S.2012.Structural feature and exploratory potential of the Lower Congo Basin[J].Progress in Geophys.(in Chinese),27(6):2585-2593,doi:10.6038/j.issn.1004-2903.2012.06.036.
    Zhang G Z,Chen H Z,Wang Q,et al.2013.Estimation of S-wave velocity and anisotropic parameters using fractured carbonate rock physics model[J].Chinese J.Geophys.(in Chinese),56(5):1707-1715,doi:10.6038/cjg20130528.
    Zhou S S,Yi W,Hao Z B,et al.2012.Experiment research and application of fluid sensitive attributes based on the pre-stack inversion[J].Chinese J.Geophys.(in Chinese),55(6):1985-1992,doi:10.6038/j.issn.0001-5733.2012.06.020.
    Zong Z Y,Yin X Y,Wu G C.2012.Fluid identification method based on compressional and shear modulus direct inversion[J].Chinese J.Geophys.(in Chinese),55(1):284-292,doi:10.6038/j.issn.0001-5733.2012.01.028.
    巴晶,晏信飞,陈志勇,等.2013.非均质天然气藏的岩石物理模型及含气饱和度反演rJ].地球物理学报,56(5):1696-1706,doi:10.6038/~g20130527.
    白俊雨,宋志翔,苏凌,等.2012.基于Xu-White模型横波速度预测的误差分析[J].地球物理学报,55(2):589-595,doi:10.6038d.issn.0001-5733.2012.02.021.
    邓继新,韩德华,王尚旭,2011.应力松弛对颗粒物质弹性性质的影响及等效介质模型校正研究[J].地球物理学报,54(4):1079-1089,doi:10.3969/j.issn.0001-5733.2011.04.023.
    董宁,霍志周,孙赞东,等.2014.泥页岩岩石物理建模研究[J].地球物理学报,57(6):1990-1998,doi:10.6038/cjg20140629.
    何涛,史謌,邹长春,等.2011.砂岩储层AVO特征影响因素的不确定性研究IJ].地球物理学报,54(6):1584-1591,do}:10.3969/j.issn.0001-5733.2011.06.018.
    黄为清,郝召兵,伍向阳.2011.一种带误差校正的横波速度预测方法[J].地球物理学进展,26(6):2184-2189,doi:10.3969/j.issn.1004-2903.2011.06.036.
    吕其彪,孙作兴.2012.岩石物理模版在储层定量解释中的应用[J].地球物理学进展,27(2):610-618,doi:10.6038/j.issn.1004-2903.2012.02.025.
    汪鹏,钟广法.2012.南海ODP1144站深海沉积牵引体的岩石物理模型研究[J].地球科学进展,27(3):359-366.
    王西文,杨午阳,吕彬,等.2013.把握世界物探技术发展现状,促进地震资料处理、解释技术进步[J].地球物理学进展,28(1):224-239,doi:10.6038/pg20130124.
    徐志诚,吕福亮,范国章,等.2012.西非海岸盆地深水区油气地质特征和勘探前景[J].油气地质与采收率,19(5):1-5.
    杨晓娟,李军,于炳松.2012.下刚果盆地构造特征及油气勘探潜力[J].地球物理学进展,27(6):2585-2593,doi:10.6038/j.issn.1004-2903.2012.06.036.
    张广智,陈怀震,王琪,等.2013.基于碳酸盐岩裂缝岩石物理模型的横波速度和各向异性参数预测[J].地球物理学报,56(5):1707-1715,doi:10.6038/cjg20130528.
    周水生,宜伟,郝召兵,等.2012.基于叠前反演的流体敏感属性实验研究及应用[J].地球物理学报,55(6):1985-1992,doi:10.6038/j.issn.0001-5733.2012.06.020.
    宗兆云,印兴耀,吴国忱.2012.基于叠前地震纵横波模量直接反演的流体检测方法[J].地球物理学报,55(1):284-292,doi:10.6038/j.issn.0001-5733.2012.01.028.
    张永刚.2007.复杂介质地震波场模拟分析与应用[M].北京:石油工业出版社,52-53.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心