利用骨架砂体叠加图进行储层预测
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摘要
针对薄砂层地区油气勘探中,地震资料分辨率达不到储层预测的精度,又无测井资料进行直接预测的情况,为了降低勘探风险,必须进行储层的预测和圈闭的综合评价。在吐哈盆地胜南合作区块的滚动勘探中,采用了精细沉积微相分析技术,对勘探目标区各小层沉积微相进行了分析,编制了各层的砂体分布图;将各层砂体中水下分流河道主力砂体提取出来,编制了各小层水下分流河道砂体的叠加图。通过对叠加图中各水下分流河道砂体叠加情况的分析,确定了优势储层分布区域。以砂体分布为基础,结合油藏断层的封闭性、油气运移的优势路径,对各砂体发育区所在的圈闭进行了成藏风险评价,提出了勘探建议,在一定程度上规避了勘探风险,收到了较好的效果。
In the exploration of the found reservoir with thin sand,the seismic data were quite inadequate for reservoir prediction,and the well logs could not be sufficient to deduce a reasonable sand body distribution.But reservoir prediction and evaluation must be done for reducing the risk of exploration.In the progressive exploration of Shengnan Block in Tuha Basin,the detailed micro-facies analysis and superposed graph were used to evaluate the targets.The micro-facies of all the layers in the reservoir were analyzed,and the distribution maps of sand body of each layer were made.The target zone belongs to braided delta deposition,and the distributary channel is the most important sedimentary facies in the sand framework.The subaqueous distributay channels in all layers were predicted on the micro-facies analysis.All the distributary channel sand bodies on a single graph were superposed,and the reservoir frame sand thickness was evaluated with the superposed graph.The favorable traps of developed sand body were fixed on the channel sand thickness,fault sealness,hydrocarbon supply and its migration way.Using the study results,some wells were designed for exploring the found reservoir edge and new small fault blocks.The sand body distribution revealed by drilled wells is coincident with the result of micro-facies analysis.
In the exploration of the found reservoir with thin sand,the seismic data were quite inadequate for reservoir prediction,and the well logs could not be sufficient to deduce a reasonable sand body distribution.But reservoir prediction and evaluation must be done for reducing the risk of exploration.In the progressive exploration of Shengnan Block in Tuha Basin,the detailed micro-facies analysis and superposed graph were used to evaluate the targets.The micro-facies of all the layers in the reservoir were analyzed,and the distribution maps of sand body of each layer were made.The target zone belongs to braided delta deposition,and the distributary channel is the most important sedimentary facies in the sand framework.The subaqueous distributay channels in all layers were predicted on the micro-facies analysis.All the distributary channel sand bodies on a single graph were superposed,and the reservoir frame sand thickness was evaluated with the superposed graph.The favorable traps of developed sand body were fixed on the channel sand thickness,fault sealness,hydrocarbon supply and its migration way.Using the study results,some wells were designed for exploring the found reservoir edge and new small fault blocks.The sand body distribution revealed by drilled wells is coincident with the result of micro-facies analysis.
引文
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[2]金龙,陈小宏,姜香云.利用地震资料定量反演孔隙度和饱和度的新方法[J].石油学报,2006,27(4):63-66.Jin Long,Chen Xiaohong,Jiang Xiangyun.Simultaneous inver-sion of porosity and saturation using seismic data[J].Acta Pe-trolei Sinica,2006,27(4):63-66.
[3]苏明军,王西文,刘彩燕,等.储层精细预测技术在周青庄油田的应用[J].石油学报,2007,28(6):92-95.Su Mingjun,Wang Xiwen,Liu Caiyan,et al.Application of high-precision reservoirs prediction techniques in Zhouqingzhuang Oil-field[J].Acta Petrolei Sinica,2007,28(6):92-95.
[4]周丽清,熊琦华,吴胜和,等.辫状河三角洲前缘沉积模式及砂体预测———以吐哈盆地温米油田中侏罗统为例[J].新疆石油地质,1999,20(5):402-404.Zhou Liqing,Xiong Qihua,Wu Shenghe,et al.The sedimentarymodel of the braided delta front and the prediction of sandbodies:An example from middle Jurassic in Wenmi Oilfield,Turpan-Ha-mi Basin[J].Xinjiang Petroleum Geology,1999,20(5):402-404.
[5]宋维琪,赵万金,冯磊,等.地震高分辨率反演和地质模拟联合预测薄储层[J].石油学报,2005,26(1):50-54.Song Weiqi,Zhao Wanjin,Feng Lei,et al.Prognoses of thin res-ervoir by combining seismic high-resolution inversion technologyand geological simulation[J].Acta Petrolei Sinica,2005,26(1):50-54.
[6]吕晓光,张学文,刘合年,等.综合运用地震反演及测井资料建立单砂体骨架模型[J].石油学报,2007,28(6):82-86.LüXiaoguang,Zhang Xuewen,Liu Henian,et al.Development ofsingle-channel sandbody framework model by integrating seismicinversion and well data[J].Acta Petrolei Sinica,2007,28(6):82-86.
[7]王延光.储层地震反演方法以及应用中的关键问题及对策[J].石油物探,2002,41(3):299-303.Wang Yanguang.Seismic reservoir inversion algorithm and thekey problems and policies in its application[J].Geophysical Pros-pecting for Petroleum,2002,41(3):299-303.
[8]杨立强.测井约束地震反演综述[J].地球物理学进展,2003,18(3):530-534.Yang Liqiang.A review of well log constrained seismic inversion[J].Progress in Geophysics,2003,18(3):530-534.
[9]王多云,李凤杰,王峰,等.储层预测和油藏描述中的一些沉积学问题[J].沉积学报,2004,22(2):193-197.Wang Duoyun,Li Fengjie,Wang Feng,et al.Some sedimentologi-cal problems on reservoir prediction and oil-pool characterisation[J].Acta Sedimentologica Sinica,2004,22(2):193-197.
[10]陈绍藩,王建永,黄国龙,等.吐哈盆地形成及其演化[J].世界核地质科学,2004,21(3):125-131.Chen Shaofan,Wang Jianyong,Huang Guolong,et al.Formationand evolution of Turpan-Hami Basin[J].World Nuclear Geosci-ence,2004,21(3):125-131.
[11]罗权生.吐哈盆地神泉油田三间房组沉积微相特征[J].新疆石油地质,2001,22(4):309-312.Luo Quansheng.Gas-oil accumulation depositioal microfaciescharacteristics of Sanjianfang Formation in Shengquan Oilfield ofTurpan-Hami Basin[J].Xinjiang Petroleum Geology,2001,22(4):309-312.
[12]李文厚,周立发,赵文智,等.西北地区侏罗系的三角洲沉积[J].地质论评,1998,44(1):63-69.Li Wenhou,Zhou Lifa,Zhao Wenzhi,et al.Deltaic sediments ofthe Jurassic in Northwestern China[J].Geological Review,1998,44(1):63-69.
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