沉积模拟方法在Bonaparte盆地的应用
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摘要
在有一定的钻井资料但地震资料分辨率不高的情况下,尝试借助沉积模拟方法对澳大利亚Bonaparte盆地某研究区进行了平面沉积相编图和储层快速评价工作。根据钻井岩心、岩性、古生物年龄、古环境等资料,在研究区Elang组—Frigate组识别出了3个层序界面,确定相对海平面呈脉动上升变化;通过类比分析,认为研究区沉积为水进型三角洲河口湾体系,主物源在盆地东南方向;输入这些参数进行沉积模拟,得到了研究区岩性及沉积结构的时空展布特征,并以此指导平面沉积相图的编制。研究区具有湾内潮控、湾外浪控,高位潮控、低位浪控,近源扇三角洲与相对远源三角洲共存的复合型沉积特点。将沉积模拟方法用于储层研究,是在特定条件下进行储层快速评价的有效方法。
There are some drilling data and low-resolution seismic data in an area of Bonaparte basin,Australia,where it is attempted to map sedimentary facies and quickly assess reservoir by means of the sedimentary simulation method.Based on the data such as drilling core,lithology,palaeontology,and palaeoenvironment,three sequence boundaries in Elang to Frigate Formation were identifed,and a pulsed rise of relative sea level was determined in the area.An analogy has indicated that there is a transgrassive deposition system of deltaic estuary in the area,with its main provenance in the southeastern basin.These parameters were inputted to make a sedimentation simulation,resulting in the time-space distribution pattern of lithology and sedimentary texture in the area,which can direct us to mapping sedimentary facies.As a composite deposition system,the area is characterized by tide dominance within the estuary,wave dominance without the estuary,highstand tide dominance,lowstand wave dominance and coexistence of proximal fan delta and relative distal fan delta.Applying the sedimentary simulation method to reservoir rocks may be an efficient tool to quickly assess reservoirs under given conditions.
There are some drilling data and low-resolution seismic data in an area of Bonaparte basin,Australia,where it is attempted to map sedimentary facies and quickly assess reservoir by means of the sedimentary simulation method.Based on the data such as drilling core,lithology,palaeontology,and palaeoenvironment,three sequence boundaries in Elang to Frigate Formation were identifed,and a pulsed rise of relative sea level was determined in the area.An analogy has indicated that there is a transgrassive deposition system of deltaic estuary in the area,with its main provenance in the southeastern basin.These parameters were inputted to make a sedimentation simulation,resulting in the time-space distribution pattern of lithology and sedimentary texture in the area,which can direct us to mapping sedimentary facies.As a composite deposition system,the area is characterized by tide dominance within the estuary,wave dominance without the estuary,highstand tide dominance,lowstand wave dominance and coexistence of proximal fan delta and relative distal fan delta.Applying the sedimentary simulation method to reservoir rocks may be an efficient tool to quickly assess reservoirs under given conditions.
引文
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[2]BAILLIE P,FRASER T,HALL R,et al.Geological developm ent ofEastern Indonesia and the northern Australia collision zone:a re-view[G]//ELLIS G K,BAILLIE P W,MUNSON T J.Timor SeaPetroleum Geoscience,Proceed ings of the Timor Sea Symposium,Northern Territory,Australia,19-20June,2003,Special Pub lication1.Darw in:Northern Territory Geological Survey,2004:539-550.
[3]AMBROSE G J.Jurassic sed im entation in the Bonaparte and north-ern B rowse Basin:new models for reservoir-source rock develop-m ent,hydrocarbon charge and entrapm ent[G]//ELLIS G K,BAILLIE P W,MUNSON T J.Symposium on Timor Sea PetroleumGeoscience.Darw in:Bonaparte Basin and Surrounds,2004:125-142.
[4]LONGLEY I M,BUSSENSNSCHUETT C,CLYDSDALE L,et al.The North W est Shelf of Australia-a W oodside perspective[G]//KEEP M,MOSS S.The Sed im entary Basins ofW estern Australiav.3,Perth:Petroleum Exploration Society of Australia,2002:27-88.
[5]BURTON R,KENDALL C G C,LERCHE I.Out of our depth:onthe impossib ility of fathom ing eustasy from the stratigraph ic record[J].Earth-Science Reviews,1987(24):237-277.
[6]CROSS T A.The scientific basis for stratigraph ic inversion[G].C iencia Tecnologia Y Futuro,2000(1):824-845.
[7]CROSS T A.Sed im ent volum e partition ing:rationale for strati-graph ic model evaluation and h igh-resolution stratigraph ic correla-tion[G]//SANDVIK K O,GRADSTE IN F,M ILTON N.Pred ic-tive h igh resolution sequence stratigraphy.Norwegian PetroleumSociety Special Pub lication,1998:171-196.
[8]VAIL P R,AUDEMARD E,BOWMAN S A,et al.The stratigraphicsignatures of tecton ics,eustasy,and sed imentology—an overview[G]//EINSELE G,R ICKENW,SEILACHER A.Cycles and eventsin stratigraphy.Berlin,Springer-Verlag,1991:617-659.
[9]HAQ B U,HARDENBOL J,VAIL P R.The chronology of fluctua-ting sea level since the Triassic[J].Science,1987,235:1156-1167.
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