资源描述:
《热复合化学提高稠油采收率》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、本科生毕业设计(论文)题目:_热复合化学提高稠油采收率学生姓名:_________徐腾__________学号:201210013120____院系:油气工程学院___专业年级:2012级石油工程专业_指导教师:_孙肖__________年月日4中国石油大学胜利学院本科毕业设计(论文)摘要目前开采稠油的常规技术是注蒸汽热采,但该技术只是暂时降低了稠油的粘度,并且存在很多问题。针对这些问题,本文介绍了三种新型蒸汽复合化学提高采收率技术。稠油注蒸汽化学辅助水热裂解技术,即将催化裂解剂体系伴随蒸汽一起注入地层,使稠油的部分重质组分发生裂解,实现稠油的不可逆降粘
2、,进而达到稠油在层内就地改质、提高采收率目的的一项新技术。蒸汽驱由于重力超覆和蒸汽窜槽的影响,蒸汽和热水主要在高渗透层流动,导致蒸汽驱体积波及系数和最终采收率大大降低,含水上升过快,开发成本越来越高。窜槽是由于蒸汽和地层原油流度比过大,重力超覆是由于蒸汽和地层原油密度差过大,两个因素相结合导致蒸汽和热水过早突破,而大量的原油残留在地层里采不出来。为解决此问题在注蒸气时混合泡沫,既能显著地提高波及效率,又可提高驱油效率。烟道气中含有氮气、二氧化碳和其他杂质,因此注烟道气开采低渗透油藏机理具有注氮气和注二氧化碳开采的双重机理。在注蒸汽是混合注如烟道气可以解决
3、由于注蒸汽过程中蒸汽的沿程热损失较大,地层压力升高较快,井底注汽压力接近或高于临界压力,蒸汽干度低的问题。关键词:水热催化裂解;蒸汽复合泡沫驱;烟道气复合蒸汽驱;稠油4中国石油大学胜利学院本科毕业设计(论文)ABSTRACTAtpresent,theconventionaltechnologyofexploitingheavyoilissteaminjection,butthetechnologyisonlyatemporaryreductionoftheviscosityofheavyoil,andtherearealotofproblems.Invi
4、ewoftheseproblems,thispaperintroducesthreekindsofnewsteamcompoundchemicalenhancedoilrecoverytechnology.Injectionheavyoilchemicalauxiliarysteamwaterthermalcrackingtechnologyiscatalyticcrackingagentsystemwithsteaminjectionformation,theheavyoilpartialheavycomponentcracking,achievedh
5、eavyirreversibleandviscosityreduction,andthentoheavyoilinalayerinsitumodification,anewtechnologytoincreasetherecoveryof.Steamfloodingduetosupercoverandsteamchannelingeffectsofgravity,steamandhotwatermainlyinthehighpermeabilitylayerflow,resultinginsteamfloodingvolumetricsweepeffic
6、iencyandrecoveryefficiencyisgreatlyreduced,toorapidriseofwatercut,thedevelopmentcostismoreandmorehigh.Channelingisduetosteamandformationcrudeoilmobilityratioistoolarge,thegravityoverrideisduetosteamandformationcrudeoildensitydifferenceistoolarge,twofactorscombinedtocausethesteama
7、ndhotwaterearlybreakthrough,andalargenumberofcrudeoilresidueintheformationoftheminedout.Inordertosolvethisproblem,themixedfoamcannotonlyincreasethesweepefficiency,butalsoimprovetheefficiencyofoildisplacement.Thefluegascontainingnitrogen,carbondioxideandotherimpurities,sofluegasin
8、jectionminingmechanismofthelowpermeabili