油层物理学课件双语.pptVIP

3.2PhaseBehaviorOfTwo-ComponentSystems(1)Itisanenvelope(开口环形)lineFC-bubblepointline,lineEC-dewpointline.(2)TheregionboundedbyPblineandPdlineisthetwo-phaseregion.Aboveandtotheleftofthebubblepointline,themixtureexistsasaliquid.Belowandtotherightofthedewpointline,themixtureexistsasagas.(3)ThecriticalpointCisthepointatwhichthebubblepointlineandthedewpointlinejoin.(1)Thephaseenvelopeforamixtureliebetweenthevaporpressurecurvesofthepureconstituents.Fig.1.1.6P-Tdiagramfortheethane-n-heptanesystem.(2)Asthecompositionofthemixturebecomesmoreevenlydistributedbetweentheconstituents,thetwo-phaseregionincreasesinsize.P7Thecharacteristicoftwophasediagram(3)Asoneconstituent(组分)becomesmorepredominant,thephaseenvelopetendstoshifttothevapor-pressurecurveofthemajorpurecomponent.(4)ThecriticaltemperatureTcofthemixtureliesbetweenthecriticaltemperaturesofthetwopurecomponents.PcisusuallyhighthenPcofthetwocomponents.Locusofcriticalpoints(临界点轨迹线)(5)alargerdifferenceinmolecularsizeofthecomponentscausesthemixturestohaveverylargecriticalpressures.6)asmalldifferenceinmolecularsizeofthecomponentscausesthesmallcriticalpressures.Phasebehaviorofmulti-componentsystem(多组分相图)测定原理：Theshapeisanenvelop.(1)Characteristic3.3Phasebehaviorofmulti-componentsystem(多组分相图)Fig.1.1.8Phasediagramofamulti-componentsystemC–Criticalpoint；KC-Bubblepointcurve.OC-Dewpointcurve.油层物理学PhysicalPropertiesofPetroleumReservoir石油工程学院油藏工程系：李爱芬2010年9月个人简介李爱芬，山东安丘人；85年毕业于华东石油大学采油专业；教授，博士，博士生导师。主要研究领域：油气渗流机理（低渗、缝洞），提高原油采收率机理，油气井出砂及防砂，储层敏感性评价，油藏流体及岩石物性研究。教学讲授课程：本科生：油层物理(汉语、双语、实验)；研究生：渗流物理，气藏工程(双语)，油藏工程(ReservoirEngineering1)等。石油深埋在地下岩石孔隙中:前言石油是一种不可再生的资源。油田开发的好坏，很大程度上取决于对油藏的认识程度。“油层物理”起源：1949年，美国M.Musket出版“采油物理原理”把以前关于油藏岩石、