模拟伪井技术在大庆葡南油田二断块储层预测中的应用
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摘要
主要目的层葡一组油层沉积环境属于三角洲前缘相水下分流河道沉积,砂层薄且横向变化快,现有井网控制程度低,采用测井约束地震反演结果精度达不到开发要求。本文提出在相控下将所掌握的地质知识与概率统计学方法相结合,应用随机模拟算法在目的层内均匀准确地建立伪井,并与实际钻井资料协同建模进行高分辨率薄互层井约束反演预测储层。其结果经钻井证实,钻遇砂岩厚度符合率达76%,钻遇有效厚度符合率达73%,表明该方法能够真实反映地层信息,提高薄差储层预测精度。
The sedimentary environment of the main objective formation Pu I is delta-front deposit is characterized by thin sand and frequent change in horizon. The control extent for existing well pattern is low and the precision of logging constrained inversion for seismic data could not meet requirement for development. On the basis of facies-control and combining geology with probability statistics,the authors proposed to establish pseudo-well model in objective formation and make reservoir prediction by using random simulation method and by means of constrained inversion of high resolution for thin interbed between true and Pseudo-wells. The results have been proved by drilling practice that the coincident rate reached 76% for drilling sandbody thickness,the coincident rate reached 73% for drilling virtual sandbody thickness. This method can precisely predict stratigraphic information and improve the prediction accuracy of thin and poor reservoir.
The sedimentary environment of the main objective formation Pu I is delta-front deposit is characterized by thin sand and frequent change in horizon. The control extent for existing well pattern is low and the precision of logging constrained inversion for seismic data could not meet requirement for development. On the basis of facies-control and combining geology with probability statistics,the authors proposed to establish pseudo-well model in objective formation and make reservoir prediction by using random simulation method and by means of constrained inversion of high resolution for thin interbed between true and Pseudo-wells. The results have been proved by drilling practice that the coincident rate reached 76% for drilling sandbody thickness,the coincident rate reached 73% for drilling virtual sandbody thickness. This method can precisely predict stratigraphic information and improve the prediction accuracy of thin and poor reservoir.
引文
[1]王欢,吴明华,王彦军,等.应用BIOT理论预测储层有效厚度[J].大庆石油地质与开发,2001,20(4):62-63.WANG Huan,WU Ming-hua,WANG Yan-jun,etal.Pre-dict reservoir effective thickness based onBIOT theory[J].PetroleumGeology&OilfieldDevelopmentinDa-qing,2001,20(4):62-63.
[2]呼舜兴,郭献广,张之文.地震反演技术在桥口—白庙地区储层预测中的应用[J].大庆石油地质与开发,2003,22(3):85-87.HU Shun-xing,GUO Xian-guang,ZHANG Zhi-wen.Ap-plication of seismic inversion technology in reservoir pre-diction inQiaokou-Baimiao area[J].PetroleumGeology&OilfieldDevelopmentinDaqing,2003,22(3):85-87.
[3]牟永光.地震勘探资料数字处理方法[M].北京:石油工业出版社,1981:58-65.MOU Yong-guang.The method of seismic exploration da-ta processing[M].Beijing:PetroleumIndustryPress,1981:58-65.
[4]曹宏,齐文同,宋新民,等.储层相对稳定性及其在储层模拟中的应用[J].石油学报,2002,23(3):56-59.CAO Hong,QI Wen-tong,SONG Xin-min,etal.Concept of relative reservoir stability and its application to reservoir simulation[J].ActaPetroleiSinica,2002,23(3):56-59.
[5]宋陨冰,王兆年.非均质油气藏的测井技术发展方向[J].天然气工业,2002,22(2):31-33.SONG Yun-bing,WANG Zhao-nian.Trend of expanding logging techniques used for heterogeneous oil and gas reservoir[J].NaturalGasIndustry,2002,22(2):31-33.
[6]Groot,P F M,BrilA H,FlorisF J T,etal.MonteCarlo simulation of wells[J].Geophysics,1996,61(3):631-638.
[7]KernerC,HarrisP E.Scattering attenuation in sediments modeled byARMA process—calibration of simpleQ models[J].Geophysics,1994,59:1813-1826.
[8]LindsethR O.Seislog process uses seismic reflection traces[J].OilandGasJournal,1976,10(25):67-71.
[2]呼舜兴,郭献广,张之文.地震反演技术在桥口—白庙地区储层预测中的应用[J].大庆石油地质与开发,2003,22(3):85-87.HU Shun-xing,GUO Xian-guang,ZHANG Zhi-wen.Ap-plication of seismic inversion technology in reservoir pre-diction inQiaokou-Baimiao area[J].PetroleumGeology&OilfieldDevelopmentinDaqing,2003,22(3):85-87.
[3]牟永光.地震勘探资料数字处理方法[M].北京:石油工业出版社,1981:58-65.MOU Yong-guang.The method of seismic exploration da-ta processing[M].Beijing:PetroleumIndustryPress,1981:58-65.
[4]曹宏,齐文同,宋新民,等.储层相对稳定性及其在储层模拟中的应用[J].石油学报,2002,23(3):56-59.CAO Hong,QI Wen-tong,SONG Xin-min,etal.Concept of relative reservoir stability and its application to reservoir simulation[J].ActaPetroleiSinica,2002,23(3):56-59.
[5]宋陨冰,王兆年.非均质油气藏的测井技术发展方向[J].天然气工业,2002,22(2):31-33.SONG Yun-bing,WANG Zhao-nian.Trend of expanding logging techniques used for heterogeneous oil and gas reservoir[J].NaturalGasIndustry,2002,22(2):31-33.
[6]Groot,P F M,BrilA H,FlorisF J T,etal.MonteCarlo simulation of wells[J].Geophysics,1996,61(3):631-638.
[7]KernerC,HarrisP E.Scattering attenuation in sediments modeled byARMA process—calibration of simpleQ models[J].Geophysics,1994,59:1813-1826.
[8]LindsethR O.Seislog process uses seismic reflection traces[J].OilandGasJournal,1976,10(25):67-71.
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