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1、第34卷第5期石油農(nóng)劈沾履V0I.34.No.52012年9月PETR0LEUMGEoLOGY&EXPERIMENTSep.,2012文章編號(hào):1001—6112(2012)05—0459—07延長(zhǎng)油田延長(zhǎng)組下部油藏與構(gòu)造的耦合作用及勘探方向王香增,高勝利,張麗霞,任來義,高鵬鵬,蒲仁海(1.陜西延長(zhǎng)石油(集團(tuán))研究院,西安710075;2.西北大學(xué)地質(zhì)學(xué)博士后流動(dòng)站,西安710069;3.西北大學(xué)大陸動(dòng)力學(xué)國家重點(diǎn)實(shí)驗(yàn)室,西安710069)摘要:通過對(duì)鄂爾多斯盆地延長(zhǎng)油田200余口探井泥巖壓實(shí)曲線的研究,系統(tǒng)分析壓實(shí)系數(shù)在平面上的分布特征,研究了壓實(shí)系數(shù)與油藏分布的耦合、
2、異常壓力與油藏分布的耦合、壓實(shí)系數(shù)與古構(gòu)造的耦合,認(rèn)為延長(zhǎng)組沉積時(shí)期的古構(gòu)造特征控制著研究區(qū)的巖性、巖相帶,最終控制該區(qū)壓實(shí)系數(shù)的分布特征。異常壓力作用于不同層位的烴源巖而發(fā)生作用,因而異常壓力及源巖的分布規(guī)律決定不同層位油藏分布。指出東部地區(qū)重點(diǎn)勘探長(zhǎng)7、長(zhǎng)9烴源層之上緊鄰的油層組,而西部、南部長(zhǎng)7一長(zhǎng)10各油層組均為重點(diǎn)勘探層系,應(yīng)繼續(xù)深入研究壓實(shí)系數(shù)與最大生烴時(shí)期各目的層古構(gòu)造的耦合關(guān)系,研究長(zhǎng)7張家灘、長(zhǎng)9李家畔頁巖的分布規(guī)律及生烴潛力。關(guān)鍵詞:壓實(shí)系數(shù);古構(gòu)造;勘探方向;延長(zhǎng)組下部油藏;三疊系;延長(zhǎng)油田;鄂爾多斯盆地中圖分類號(hào):TEl22.3文獻(xiàn)標(biāo)識(shí)碼:ACoup
3、lingofreservoirsandstructuresandexplorationtargetsinLowerYanchangFormationofTriassic,YanchangOilFieldWangXiangzeng,GaoShengli,ZhangLixia,RenLaiyi,GaoPengpeng,PuRenhai(1.InstituteofShaanxiYanchangPetroleum(Group)Co.LTD,Xi’an,Shaanxi710075,China;2.MobileStationforPost—DoctorsonGeology,Northw
4、estUniversity,Xi’an,Shaanxi710069,China;3.StateKeyLaboratoryofContinentalDynamics,rthwestUniversity。Xi’an,鼽aalL~710069,M)Abstract:Accordingtothecompactioncurvesofmudstonesfromover200wellsintheYanchangOilFieldoftheOrdosBasin,theplanedistributionofcompactioncoefficientswasanalyzedsystematica
5、lly.Thecouplingrelation—shipsbetweencompactioncoeficient&reservoirdistribution,abnormalpressure&reservoirdistribution,con—pactioncoeficient&paleostructurewerestudied.ThepaleostructureswhentheYanchangFormationdepositedcontrolledthelithologyandlithofaciesofthestudyarea,andfinallycontrolledth
6、edistributionofcompactionCO—eficient.Abnormalpressuresworkedonsourcerocksindifferentstrata.Asaresult,thedistributionofabnormalpressuresandsourcerocksdeterminedthedistributionofreservoirsindifferentstrata.Intheeastofthestudyarea,theexplorationdirectionsshouldbefocusedonthereservoirgroupsabo
7、vetheChang7andChang9sourcerocks.Inthewestandsouthofthestudyarea,thereservoirgroupsfromtheChang7totheChang10shouldbetargeted.Thecouplingrelationshipbetweencompactioncoefficient&paleostructureduringthemaximumhydro—carbongenerationstagewasfurtherstudied.Thedistri