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1、西安石油大學(xué)碩士學(xué)位論文特低滲儲層應(yīng)力敏感性室內(nèi)實(shí)驗(yàn)研究——以YH區(qū)塊長6<'1>和NZ區(qū)塊長6<'3>儲層為例姓名:李轉(zhuǎn)紅申請學(xué)位級別:碩士專業(yè):油氣田開發(fā)工程指導(dǎo)教師:張寧生;任曉娟20060515中文摘要論文題目:專業(yè):碩士生:指導(dǎo)老師:特低滲儲層應(yīng)力敏感性室內(nèi)實(shí)驗(yàn)研究油氣田開發(fā)李轉(zhuǎn)紅(簽名)張寧生,任曉娟摘要本論文主要以特低滲儲層巖心資料和地質(zhì)資料為依據(jù),以實(shí)驗(yàn)分析為主要研究手段,結(jié)合巖石孔喉結(jié)構(gòu)理論及儲層特征:對研究區(qū)巖心樣品模擬地層條件進(jìn)行了滲透率應(yīng)力敏感性傷害和恢復(fù)性實(shí)驗(yàn)研究;根據(jù)以上研究結(jié)果并綜合研究區(qū)儲層的巖石
2、學(xué)特征、儲層物性、孔隙結(jié)構(gòu)等對兩區(qū)塊儲層的應(yīng)力敏感性進(jìn)行綜合評價(jià):最后,應(yīng)用兩種預(yù)測模型并結(jié)合兩區(qū)塊的地質(zhì)特征對兩地區(qū)儲層因壓敏效應(yīng)引起的產(chǎn)量變化進(jìn)行了預(yù)測。主要研究結(jié)果為:特低滲透油田儲層對應(yīng)力的變化比較敏感,滲透率降低幅度較大;隨著恢復(fù)時(shí)間的延長,滲透率有不同程度的恢復(fù),且滲透率降低和恢復(fù)程度與滲透率大小有關(guān),初始滲透率越低,滲透率降低幅度越大且越難以恢復(fù);兩種預(yù)測模型表明,兩區(qū)塊分別在保持恒定的生產(chǎn)壓差時(shí),隨地層壓力的降低,油井產(chǎn)量降低幅度越大,且滲透率越低產(chǎn)量降低越大。對比發(fā)現(xiàn):裂縫因受壓更容易閉合,裂縫性巖樣比基質(zhì)性巖
3、樣應(yīng)力敏感性強(qiáng)并且引起產(chǎn)量降低大;由于兩區(qū)塊的儲層特征有差異,NZ區(qū)塊比YH區(qū)塊應(yīng)力敏感性強(qiáng),但其因壓敏效應(yīng)引起的產(chǎn)量降低幅度比YH區(qū)塊小。關(guān)鍵詞:特低滲;應(yīng)力敏感性:裂縫性;油井產(chǎn)量論文類型:應(yīng)用研究英文摘要Subject:Speciality:Name:lnstructor:AnExperimentalStudyoiltheStressSensitivityofExtraLowPermeabilityReservoirsOil&GasExplorationEn【gineetingLiZhuanhong(signature)上
4、上蛐ZhangNingsheng,RenXiaojuan(signature)ABSTRACTBasedoncoreandgeologicaldataintheextralowpermeabilityreservoir,bythetechniqueofexperimentalanalysisandcombinedwiththetheoryofrockporecompressingandthereservoircharacteristics,theresearchexperimentofthedegreeofcorepermeab
5、ilityiniuryandrecoverytostresssensitivityintwoblocksaredesignedundertheconditionthatsimulateformation;thestresssensibilityofreservoirareevaluatedbycombiningtheresearchresultsasabovementionedwiththepetrologyfeatures,thephysicalproperties,andtheporestructureoftwoblocks
6、;finally,theinfluenceofstresssensitivityontheproducdvityoftwoblocksispredictedbyapplyingtwokindsofpredictionmodelsandcombiningthegeologicalfeatures.Theresultsshowthattheextralowpermeabilityreservoirisrelativelysensitivetostresschangeandthepermeabilitywillhavearelativ
7、elylargedecreasewiththeincreaseofstress;permeabilityhasalsorecoveredtoacertaindegreewiththerecoverytimetobeprolonged,andthedegreeofcorepermeabilityinjuryandrecoveryisrelatedtotheextentofinitialpermeability,corepermeabilitydecreaseislargerandrecoveryismoredifficultwit
8、hlowertheinitialpermeability;themodelpredictionshow,thedropingofoilwellproductivityisgreaterastheformationpressuredecreaseswhenprod