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1、礦物巖石地球化學(xué)通報(bào)·研究成果·BulletinofMineralogy,PetrologyandGeochemistryVo1.35No.4,July,2016遼河坳陷西部凹陷南段異常低壓背景下的致密砂巖類型預(yù)測孟元林,崔存蕭,張鳳蓮,孟凡晉,胡安文,趙紫桐,許丞,曲國輝1.東北石油大學(xué)地球科學(xué)學(xué)院,黑龍江大慶163318;2.中國石油遼河油田分公司勘探開發(fā)研究院,遼寧盤錦124010;3.UniversityofHouston.HoustonTX77036摘要:為了預(yù)測渤海灣盆地遼河坳陷西部凹陷南段古近系異常低壓背景下致密砂巖的類型與分布規(guī)律,討論了
2、沉積相和成巖作用對致密儲集層物性的綜合影響,應(yīng)用異常低壓力背景下的成巖數(shù)值模擬模型,預(yù)測了沙三段的成巖階段,結(jié)合沉積相的研究成果,預(yù)測了異常低壓背景下沙三中亞段的各種致密儲集層類型在平面上的分布。結(jié)果表明,常規(guī)儲集層(孔隙度≥10%)主要分布在研究區(qū)埋藏較淺的歡曙斜坡帶;低致密儲集層(6.0%≤<10%)和高致密儲集層(2.0%≤<6.0%)主要分布在埋藏較深的凹陷區(qū)。關(guān)鍵詞:致密砂巖氣;非常規(guī)油氣;異常低壓;成巖模擬;儲集層質(zhì)量預(yù)測;遼河坳陷中圖分類號:P618.130文章編號:1007.2802(2016)04.0701—09doi:i0.3969/
3、j.i8sn.1007—2802.2016.04.011APredictionofTightSandstoneTypesunderAbnormallyLowPressureintheSouthernPartoftheWestSagoftheLiaoheDepressionMENGYuan—lin,CUICun.xiao,ZHANGFeng—lian,MENGFan-jin,HUAn—wen。,ZHAOZi—tong,XUCheng,QUGuo—hui1.NortheastPetroleumUniversity,Daqing163318,China;2.I
4、nstituteofExploration&Development,LiaoheOilfieldCompanyCo.Ltd.,PetroChina,Panjin124010,China;3.UniversityofHouston,HoustonTX77036,USAAbstract:InordertopredicttypesanddistributionregulationsofthePaleocenetightsandstoneunderabnormallylowpressureintheSouthernpartoftheWestSagoftheLia
5、ohedepressinintheBohaiwanBasin,theintegratedeffectsofsedi—mentaryfaciesanddiagenesesonthepropertyofthetightreservoirshavebeenstudied,andthediageneticstagesanddis—tributionofvarioustightreservoirtypesoftheEs;underabnormallylowpressurehavebeenpredictedlaterallybyusingdi-ageneticnum
6、ericalmodelingunderabnormallylowpressureincombinationwiththeresearchresultsofsedimentaryfacies.Theresultsshowthattheconventionalreservoirs(porosity≥10%)aredistributedmainlyintherelativelyshallowburiedHuanshuSlopzone,whilelowdensityreservoirs(6.O%≤<10%)andhighdensityreservoirs(2.0
7、%≤<6.O%)aremainlydistributedintherelativelydeepburiedSagzoneofthestudyarea.Keywords:tightsandstonegas;unconventionalgasandoil;underpressure;diageneticmodeling;reservoirqualitypre—diction;Liaohedepression中國目前發(fā)現(xiàn)的致密儲集層主要分布在中生225和雙227等井中發(fā)現(xiàn)了低產(chǎn)氣流,這些低產(chǎn)氣界和古生界(鄒才能,2013),但渤海灣盆地遼河坳流井的存在證實(shí)了西
8、部凹陷南段致密砂巖具有很陷西部凹陷南段致密砂巖卻發(fā)育在新生界古近系。大勘探潛力。