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1、第2O卷第2期EarthScienceFron地tie學rs前(C緣hin(a中U國niv地ers質ity大o學fG(e北osc京1en)c;es北(B京eij大ing學);)PekingUniversity)Vol_2ONo.22013年3月Mar.2O13鄂爾多斯盆地隴東地區(qū)延長組低滲透儲層孑L隙結構分類研究冉新權,吳勝和,付晶,魏新善,楚美娟1.巾國石油長慶油田分公司,陜西兩安7100182.中國石油大學(JL京)地球科學學院,北京102249RANXinquan,WUShenghe。,F(xiàn)UJing,WEI
2、Xinshan,CHUMeijuan1.PetroCkinaChangqing(~ljieldCompany,Xi710018,China2.CollegeOfGeoseiences,ChinaUniversityf)fPetroleum(Beijing),Beijing102249,ChinaRANXinquan,Ⅵr【JShenghe,F(xiàn)UJing,eta1.ResearchontheporestructureclassificationoflowpermeabilityreservioroftheYanch
3、angFormationinLongdongArea,OrdosBasin.EarthScienceFrontiers,2013,20(2):077-085Abstract:Usingthedatasuchascastthinsection,scanningelectronmicroscopeandmercury-injection,thepresentpaperinvestigatestheporestructureclassificationstandardsoflowpermeabilityreservoi
4、roftheYanchangFormationinI.ongdongArea,()rdosBasin.Thecorrelationanalysisamongcharacteristicparametersofmicroscopicporestructureandmacroscopicphysicalpropertiesshowsthatthemaximumconnectedpore—throatradiushasthebestcorrelativitywithpermeabilityandactsasthefav
5、orableparameterforthroatgrading;usingmethodofdataconfiguration,thepaperdeterminesthethroatgradingboundariesandestablishesthegradingstandardsofreservoirporesandthroats.ThereservoirporestructureoftheYanchangFormationcouldbeclassifiedintosixtypesincludingbig—mid
6、porecoarsethroattype,midsmallporemidthroattype,mid—smallporefinethroattype,smallporemicro—finethroattype,fine-microporemicrofinethroattype,andfine-microporemicrothroattype.Reservoircouldhavedifferentphysicalpropertiesandliquidproductioncapacityaccordingtoitsp
7、orestructuretype.Keywords:lowpermeabilityreservoir;microscopicporestructure;classifiedevaluation;YanchangFormationofI.ongdongArea摘要:運用鑄體薄片、掃描電鏡與常規(guī)壓汞等資料,對隴東地區(qū)延長組低滲透儲層孔隙結構分類標準進行了研究。不同孔隙結構特征參數(shù)與宏觀物性參數(shù)的相關分析表明,最大連通喉道半徑與滲透率的相關關系最好,為喉道分級的最優(yōu)參數(shù);運用數(shù)據(jù)構形的方法確定出了喉道分級界限,建立了儲
8、層孔隙、喉道分級標準。綜合孔隙與喉道大小的組合及儲層孔喉的其他特征,將延長組儲層砂巖的孔隙結構劃分為六種類型:大一中孔粗喉型、中一小孔中喉型、中一小孔細喉型、小孔微細喉型、細一微孔微細喉型和細一微孔微喉型。不同孔隙結構類型的儲層具有不同的物性特征及不同的產液能力。關鍵詞:低滲透砂巖儲層;微觀孔隙結構;分類評價;隴東地區(qū)延長組中圖分類號:TE122文獻標志碼:A文章編號:1