纵横波速度比在东胜气田致密低渗储层流体识别中的应用
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摘要
东胜气田锦72井区盒1段储层纵向非均质性强,含气饱和度差异大,气水赋存状态多样,预测有效储层是目前勘探开发的关键问题。笔者结合测井数据,采用统计、对比研究方法,建立盒1段致密低渗储层流体测井响应特征及识别标准。理论证明,含气砂岩随着含气饱和度升高,纵波速度和横波速度都降低,但是纵波速度比横波速度变化大,因此,纵横波速度比降低。在此理论基础上,通过交会图分析,定量化识别出储层流体,同时采用纵横波速度比反演与纵波阻抗反演分析,明确了研究区盒1段气水分布规律及其空间展布特征,为研究区油气勘探提供依据。
The longitudinal heterogeneity of reservoir and gas saturation in He 1 member of well block Jin 72 of Dongsheng gas field is quite large,and gas and water distribution is diverse.Predicting effective reservoir is a key issue in exploration and development.Combined with well logging data,a statistical and comparative study method was used to establish the logging response characteristics and the criteria of fluid identification in the tight sandstone reservoir of He 1 member.The theory proves that the gas-bearing sandstone decreases with the increase of gas saturation,and the longitudinal wave velocity and the shear wave velocity decrease,but the longitudinal wave velocity changes more than the shear wave velocity.Therefore,the longitudinal and transverse wave velocity ratio decreases.Based on this theory,the reservoir fluid is quantitatively identified through cross-section analysis.At the same time,based on the longitudinal and transverse wave velocity ratio inversion and longitudinal wave impedance inversion analysis,the regularity of gas-water distribution and its spatial distribution characteristics in He 1 member of the study area are clarified,which provides the basis for oil and gas exploration in the study area.
The longitudinal heterogeneity of reservoir and gas saturation in He 1 member of well block Jin 72 of Dongsheng gas field is quite large,and gas and water distribution is diverse.Predicting effective reservoir is a key issue in exploration and development.Combined with well logging data,a statistical and comparative study method was used to establish the logging response characteristics and the criteria of fluid identification in the tight sandstone reservoir of He 1 member.The theory proves that the gas-bearing sandstone decreases with the increase of gas saturation,and the longitudinal wave velocity and the shear wave velocity decrease,but the longitudinal wave velocity changes more than the shear wave velocity.Therefore,the longitudinal and transverse wave velocity ratio decreases.Based on this theory,the reservoir fluid is quantitatively identified through cross-section analysis.At the same time,based on the longitudinal and transverse wave velocity ratio inversion and longitudinal wave impedance inversion analysis,the regularity of gas-water distribution and its spatial distribution characteristics in He 1 member of the study area are clarified,which provides the basis for oil and gas exploration in the study area.
引文
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[2]石亚兰,贾曙光,郑求根,等.叠前同时反演在浅层疏松砂岩储层预测中的应用[J].物探与化探,2017,41(1):9-15.Shi Y L,Jia S G,Zheng Q G,et al.The application of prestack simultaneous inversion to shallow unconsolidated sandstone reservoir prediction[J].Geophysical and Geochemical Exploration,2017,41(1):9-15.
[3]程志国,胡婷婷,瞿建华,等.准噶尔盆地玛西地区致密砂砾岩优质薄储层预测[J].物探与化探,2015,39(5):891-896.Cheng Z G,Hu T T,Qu J H,et al.High-quality and thin reservoir of tight conglomerate prediction in Maxi area of Junggar Basin[J].Geophysical and Geochemical Exploration,2015,39(5):891-896.
[4]陈军,陈岩.地震属性分析在储层预测中的应用[J].石油物探,2001,40(3):94-99.Chen J,Chen Y.Application of seismic attribute analysis in reservoir prediction[J]. Geophysical Prospecting for Petroleum,2001,40(3):94-99.
[5]王利田,苏小军,管仁顺,等.地震属性分析在彩16井区储层预测中的应用[J].地球物理学进展,2006,21(3):922-925.Wang L T,Su X J,Guan R S,et al.The appliation of seismic attribute analyscs in predicating reservoir of cai 16 area[J].Progress in Geophysics,2006,21(3):922-925.
[6]王永刚,谢东,乐友喜,等.地震属性分析技术在储层预测中的应用[J].石油大学学报:自然科学版,2003,27(3):30-32.Wang Y G,Xie D,Yue Y X,et al.Application of seismic attribute analysis technology in reseroir prediction[J].Journal of the University of Petroleum:Science Edition,2003,27(3):30-32.
[7]孙建孟,王永刚.地球物理资料综合应用[M].东营:中国石油大学出版社,2000.Sun J M,Wang Y G.Comprehensive application of geophysical data[M].Dongying:China University of Petroleum Press,2000.
[8]王兴建,曹俊兴.纵横波联合反演在苏里格含气性检测中的应用[J].天然气工业,2008,28(10):44-45.Wang X J,Cao J X.Application of p and S wave inversion to detecting gas potential in the Sulige gas field[J].Natural Gas Industry,2008,28(10):44-45.
[9]曹绍贺,陈叙安.AVO技术在杭锦旗锦58井区致密碎屑岩储层预测中的应用[J].石油地质与工程,2017,31(2):54-60.Cao S H,Chen X A.Application of AVO technique for dense clastic rock reservoir prediction in Hangjingqijing 58 wellblock[J].Petroleum Geology and Engineering,2017,31(2):54-60.
[10]李永杰,赵荣华.鄂尔多斯盆地杭锦旗地区上古生界储层自然伽马测井相研究[J].石油地质与工程,2014,28(2):61-66.Li Y J,Zhao R H. The research of natural gamma ray logging for upper Palaeozoic reservoir in Hangjingqi area of Ordos Basin[J].Petroleum Geology and Engineering,2014,28(2):61-66.
[11]赵俊峰,魏昭冰,范瑞虹.苏里格气层测井识别与评价研究[J].断块油气田,2004,11(1):77-80.Zhao J F,Wei Z B,Fan R H.The Research of identification and evaluation Sulige's gas-layers in well logging[J]. Fault-Block Oil and Gas Field,2004,11(1):77-80.
[12]范玲玲.杭锦旗地区十里加汗区带致密砂岩高产气层特征研究[J].石油化工应用,2017,36(3):80-84.Fan L L.Study on characteristics of high productivity gas layers in tight sandstone in Shilijiahan zone of Hangjingqi area[J]. Petrochemical Industry Application,2017,36(3):80-84.
[13]谭廷栋.纵横波速比直观指示气层的解释方法[J].石油学报,1990,1(3):41-45.Tan Y D. An interpretation technique for visually identifying gas formation by means of velocity ratio of compressional and shear waves[J].Acta Petroler Sinica,1990,1(3):41-45.
[14]宗兆云,印兴耀,吴国忱.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,2012,55(1):284-292.Zong Z Y,Yin X Y,Wu G C.Fluid identification method based on compressional and shear modulus direct inversion[J]. Chinese J.Geophys.(in Chinese),2012,55(1):284-292.
[15]张颖,许庆英,龚爱华,等.中子—密度重叠识别气层法在长庆气田的应用[J].测井技术,2007,31(3):278-281,294.Zhang Y,Xu Q Y,Gong A H,et al.Application of neutron-density overlapping to identify gas reservoir in Changqing gas field[J].Well Logging Technology,2007,31(3):278-281,294.
[16]谭廷栋.应用纵横波速度比勘探天然气[J].石油地球物理勘探,1987,22(1):86-93.Tan T D.Detecting a gas reservoir using the ratio of P-wave-velocity to S-wave-velocity[J].OGP,1987,22(1):86-93.
[17]印兴耀,周静毅.地震属性优化方法综述[J].石油地球物理勘探,2005,40(4):482-489.Yin X Y,Zhou J Y.Summary of optimum methods of seismic attributes[J].OGP,2005,40(4):482-489.