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1、畢業(yè)論文題目:墊塑漁里籃鲞漁亟垡星鹽塹叢亞筮盟筮盟窒塑造些質(zhì)堂專(zhuān)業(yè)Q2級(jí)碩士生姓名:奎猩指導(dǎo)教師(姓名、職稱(chēng)):塞』室塑絲撞摘要遼河低滲油田儲(chǔ)量豐富,截至2008年底,共探明含油面積364.2km2,探明儲(chǔ)量3.76×108t。低滲儲(chǔ)量占遼河總儲(chǔ)量的16.2%,年產(chǎn)量占遼河油區(qū)總年產(chǎn)量的9%,占遼河稀油年產(chǎn)量的22%。近年來(lái)遼河新增探明儲(chǔ)量中,低滲透油田儲(chǔ)量所占比例逐年增大,由2003年的21%逐漸增加到目前的61%。目前遼河低滲油藏整體開(kāi)發(fā)效果差,平均標(biāo)定采收率僅為17.4%,比遼河平均標(biāo)定采收率24.6%低7.2%,采出程度低10%,采油速度低0.21%。低滲油田開(kāi)發(fā)的矛盾已經(jīng)嚴(yán)重
2、制約了低滲油田的有效開(kāi)發(fā),迫切需要尋找切實(shí)有效的方法來(lái)解決目前的低效、低速、難動(dòng)用的局面,因此重新認(rèn)識(shí)低滲油藏,從儲(chǔ)層沉積微相研究入手,深化對(duì)油藏形成規(guī)律和分布特征的認(rèn)識(shí),尋找有效的開(kāi)采技術(shù),提高遼河低滲油田的開(kāi)發(fā)效果具有很重要的意義。通過(guò)該項(xiàng)目的研究,提出了以下三點(diǎn)認(rèn)識(shí):1)遼河油田低滲儲(chǔ)層特征整體表現(xiàn)為:平面分布廣、儲(chǔ)量豐度低、儲(chǔ)層物性差、非均質(zhì)性較嚴(yán)重、粘土礦物含量高及儲(chǔ)層敏感性強(qiáng)。2)遼河油田低滲油藏開(kāi)采特征主要表現(xiàn)為:天然能量不足、自然產(chǎn)能低、壓裂效果維持時(shí)間短、水井吸水能力差。3)依據(jù)不同油藏地質(zhì)和開(kāi)發(fā)特征,可有針對(duì)性地采取非均勻井網(wǎng)調(diào)整、分注、混相/非混相驅(qū)、對(duì)應(yīng)壓裂、水
3、平井等技術(shù)。通過(guò)應(yīng)用灰色系統(tǒng)理論方法,建立油藏潛力灰色系統(tǒng)綜合評(píng)價(jià)標(biāo)準(zhǔn),使油藏潛力評(píng)價(jià)由定性向定量、由單指標(biāo)評(píng)價(jià)向多指標(biāo)綜合評(píng)價(jià)轉(zhuǎn)化,評(píng)價(jià)遼河低滲油田的技術(shù)潛力,預(yù)計(jì)提高可采儲(chǔ)量3010×104t,采收率提高8%。關(guān)鍵詞:遼河油田低滲透油藏,儲(chǔ)層,杜家臺(tái)油層,灰色系統(tǒng)THESIS:TheresearchofthecharacteristicsofLowpermeabilityreservoirsanddevelopmentstrategiesofLiaoheoilfieldSPECIALIZATION:StructuralGeologyPOSTGRADUATE:LiChengMENTO
4、R:Prof.LiuJia.runABSTRACTUntiltheendof2008,itisprovedthattheoil—bearingareaistotally364.2km2,andtheprovedreservesis3.76×108t,whichtakes16.2%ofthetotallyreservesofLiaoheoilfield.Theannualoutputoflowpermeabilityreservoirsis9%ofthetotalreserves,aswellas22%ofthelightoilofannuallyoutputinLiaoheOilfie
5、ld.Amongtherecentyears’newprovedreservesintheLiaoheOilfield,theproportionoflowpermeabilityoilreserveshasincreasedyearbyyear,whichupto61%presentlyfrom21%in2003.Atpresent,wecanseethattheoveralldevelopmentofthelowpermeabilityreservoirlagsbehindamongLiaoheoilfield.Comparedwiththeaveragerecoveryratio
6、ofLiaoheOilfield,whichis24.6%,theratiooflowpermeabilityreservoirwasonly17.4%,whichis7.2%lower.Ontheotherhand,thedegreeofreserverecoveryis10%lower,andtheoilproductionrateis0.21%lowerthantheaverageratio.Thespearandshieldhasseriouslyrestrictedtheeffectivedevelopmentinthedevelopmentoflowpermeability
7、oilfield.Wehaveconfrontedtheurgentneedstofindeffectivewaystosolvethecurrentsituationthatlowpermeabilityreservoirisslowanddifficulttouse.Therefore,weneedtore—understandthelowpermeabilityreservoiLfromthestudyofthereservoirprec