核Fisher判别分析方法在黄河口凹陷储集层流体解释评价中的应用
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摘要
储集层流体解释评价一直是油气勘探需要解决的关键性问题。以黄河口凹陷的二级构造带中东部走滑带、中部走滑带、西南斜坡带共计76口井的录井资料为基础,以统计学的判别分析为切入点,分别利用Fisher线性判别方法和核Fisher非线性判别方法对研究区的储集层流体进行识别,其应用效果证实核Fisher判别分析法在黄河口凹陷流体识别的可行性和优越性。经反复分析验证可知,基于核Fisher判别分析方法的符合率均达85%以上,证明基于核Fisher判别分析方法利用常规气测录井资料识别储集层含油性是可行的,对于油水层快速识别评价有一定的指导意义,对于其他区块的储集层流体识别也有一定的借鉴意义和参考价值。
Reservoir fluid interpretation and evaluation has always been a key problem to be solved in oil and gas exploration.Based on mud logging data of 76 wells at the mid-eastern strike-slip zone,middle strike-slip zone and southwest slope of the secondary structural belt in Huanghekou sag,and starting from the discriminant analysis of statistics,Fisher linear discriminant method and kernel Fisher nonlinear discriminant method are used to identify reservoir fluid in the study area respectively.The application results proved the feasibility and superiority of kernel Fisher discriminant analysis method in fluid identification of Huanghekou sag.Through repeated analysis and verification,the coincidence rate of discriminant analysis method based on kernel Fisher is over85%,which proves that it is feasible to identify reservoir oilbearing property by using conventional gas logging data based on kernel Fisher discriminant analysis method.It has certain guiding significance for rapid identification and evaluation of oil and water layers,and also has certain reference significance and reference value for reservoir fluid identification in other blocks.
Reservoir fluid interpretation and evaluation has always been a key problem to be solved in oil and gas exploration.Based on mud logging data of 76 wells at the mid-eastern strike-slip zone,middle strike-slip zone and southwest slope of the secondary structural belt in Huanghekou sag,and starting from the discriminant analysis of statistics,Fisher linear discriminant method and kernel Fisher nonlinear discriminant method are used to identify reservoir fluid in the study area respectively.The application results proved the feasibility and superiority of kernel Fisher discriminant analysis method in fluid identification of Huanghekou sag.Through repeated analysis and verification,the coincidence rate of discriminant analysis method based on kernel Fisher is over85%,which proves that it is feasible to identify reservoir oilbearing property by using conventional gas logging data based on kernel Fisher discriminant analysis method.It has certain guiding significance for rapid identification and evaluation of oil and water layers,and also has certain reference significance and reference value for reservoir fluid identification in other blocks.
引文
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[2] 王根照,胡望水. 黄河口凹陷北半环的构造样式及构造演化[J]. 石油天然气学报(江汉石油学院学报),2008,30(3):166-169. WANG Genzhao,HU Wangshui. Tectonic pattern and evolution of the northern half ring in Huanghekou sag[J]. Journal of Oil and Gas Technology(Journal of Jianghan Petroleum Institute),2008,30(3):166-169.
[3] 宋延杰,张剑风,闫伟林,等. 基于支持向量机的复杂岩性测井识别方法[J]. 大庆石油学院学报,2007,31(5):18-20,46. SONG Yanjie,ZHANG Jianfeng,YAN Weilin,et al. A new identification method for complex lithology with support vector machine[J]. Journal of Daqing Petroleum Institute,2007,31(5):18-20,46.
[4] 刘倩. 松辽盆地火山岩地球化学特征研究[D]. 大庆:东北石油大学,2013. LIU Qian. Volcanics geochemical behavior study in Songliao Basin[D]. Daqing:Northeast Petroleum University,2013.
[5] 李伟伟,杨成,王迪,等. 基于Fisher判别分析法的流体识别[J]. 石油化工应用,2013,32(12):13-18. LI Weiwei,YANG Cheng,WANG Di,et al. A method of fluid recognition basing on Fisher discriminant analysis[J]. Petrochemical Industry Application,2013,32(12):13-18.
[6] 刘杰,张涛,王建,等. Fisher判别分析法在核磁共振录井油水层识别中的应用[J]. 录井工程,2014,25(1):25-29. LIU Jie,ZHANG Tao,WANG Jian,et al. Application of Fisher discriminant analysis in identification of oil and water layers with nuclear magnetic resonance logging[J]. Mud Logging Engineering,2014,25(1):25-29.
[7] 胡云,尚锁贵,吴昊晟,等. 基于SPSS的岩石热解储集层流体判别分析方法[J]. 录井工程,2016,27(2):7-11. HU Yun,SHANG Suogui,WU Haosheng,et al. SPSS-based method for discriminant analysis of rock pyrolysis reservoir fluids[J]. Mud Logging Engineering,2016,27(2):7-11.