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1、維普資訊http://www.cqvip.com石油學(xué)報(bào)Vo1.27NO.6第27卷第6期2006年11月ACTAPETROIEISINICANOv.2006文章編號(hào):0253—2697(2006)ll6—0055—05砂巖儲(chǔ)層地震屬性參數(shù)對(duì)孑L隙流體的敏感性評(píng)價(jià)鄧?yán)^新王尚旭李生杰王緒本(1成都理工大學(xué)信息工程學(xué)院四川成都610059;2中國(guó)石油大學(xué)CNPC物探重點(diǎn)實(shí)驗(yàn)室北京102249)摘要:對(duì)于不同特性的砂巖儲(chǔ)層,從地震數(shù)據(jù)所提取的多種屬性參數(shù)對(duì)孔隙流體變化的響應(yīng)是有一定差異的。利用統(tǒng)計(jì)學(xué)原理給出了流體指示因子的計(jì)算方法,用于定量評(píng)價(jià)地震屬性參數(shù)對(duì)孔隙流體變化的響應(yīng)差異。利用勝利油田沙
2、河街組三段砂巖儲(chǔ)層在模擬儲(chǔ)層條件下的實(shí)驗(yàn)結(jié)果,采用屬性交會(huì)圖技術(shù)驗(yàn)證了流體指示因子的正確性。對(duì)于疏松砂巖及中一高孔隙度固結(jié)砂巖,利用縱、橫波阻抗差等常規(guī)地震屬性可較好地判別孔隙含氣及飽和水、飽和油狀態(tài);而對(duì)于致密含氣砂巖,縱、橫波速度比及泊松比對(duì)流體變化相對(duì)較為敏感。對(duì)于疏松砂巖,由雙敏感屬性參數(shù)所構(gòu)成的交會(huì)圖可區(qū)分飽和油與飽和水狀態(tài),但利用常規(guī)屬性交會(huì)圖難以區(qū)分固結(jié)砂巖孔隙飽和水與飽和油。在準(zhǔn)確給出干燥巖石縱、橫波速度比的基礎(chǔ)上,組合屬性參數(shù)—c·相對(duì)于常規(guī)屬性對(duì)孔隙流體化更為敏感,構(gòu)成的屬性交會(huì)圖對(duì)飽和水與飽和油砂巖樣品的實(shí)驗(yàn)結(jié)果具有明顯的區(qū)分能力。關(guān)鍵詞:砂巖儲(chǔ)層;地震屬性參數(shù);孔隙
3、流體流動(dòng);敏感性評(píng)價(jià);屬性交會(huì)圖中圖分類號(hào):P631.8文獻(xiàn)標(biāo)識(shí)碼:ASensitivityevaluationofseismicattributeparametersforsandstonereservoirtoporefluidDengJixinWangShangxuLiShengjieWangXuben(1.CollegeofInformationEngineering,ChengduUniversityofTechnology,Chengdu610ll59,China;2.CNPCKeyLaboratoryforGeophysicalProspecting。ChinaUnivers
4、ityofPetroleum。Beijing102249,China)Abstract:TheresponseofseismicattributeparameterstOvariationofporefluidisdifferentforvarioussandstonereservoirs.Acalcu—lationmethodforfluidindicatorisgivenbythestatisticalmethodandusedtOreflecttheresponsedifferenceofseismicattributepa—rameterstOfluidvariation.Expe
5、rimentalresultsofsandstonereservoirinthethirdmemberofShah@eFormationinShengliOilFieldprovedtheapplicabilityofthisapproachusingseismicattributeserossplottechnique.AccordingtOthecalculationresultsoffluidin—dieator,theeonventionalattributes,suchasresponsedifferenceofPwaveandSwave,aresufficientfordisc
6、riminationofgasstateinmiddle-highporosityuncons0lidatedsandstonesandcementedsandstonessamplesaturatedwithwaterandoil.Forthetightsand—stonecontaininggas,onlyvelocityratioofPwavetOSwaveandPoissonratioaresensitivetOfluidvariation.Fortheunconso¨datedsandstones,thecrossplotcanbeusedtOdistinguishsaturat
7、edoilfromsaturatedwaterbyselectingtwosensitiveattributeparametersaccordingtOtheirrelativevaluesoffluidindicator.Forthecementedsandstone,thisapproachisnotapplicable.OnthebasisofexactvelocityratioofPwavetOSwaveindr