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1、中國(guó)石油大學(xué)(華東)碩士學(xué)位論文水平井流線數(shù)值試井解釋方法姓名:賈維霞申請(qǐng)學(xué)位級(jí)別:碩士專(zhuān)業(yè):油氣田開(kāi)發(fā)工程指導(dǎo)教師:姚軍20090401摘要水平并在油氣田開(kāi)發(fā)中的應(yīng)用愈來(lái)愈多,傳統(tǒng)的基于解析方法的水平井試井解釋方法無(wú)法準(zhǔn)確解釋中高含水期油藏的水平井測(cè)試資料,有必要建立基于真實(shí)油藏模型的水平井的數(shù)值試井解釋方法。論文將流線數(shù)值試井技術(shù)應(yīng)用于水平井,形成了一套能夠考慮生產(chǎn)歷史、非均質(zhì)性、兩相流、不同井網(wǎng)等復(fù)雜因素的水平井流線數(shù)值試井解釋新方法。首先,建立了水平井流線數(shù)值試井解釋模型,該模型由生產(chǎn)和測(cè)試兩個(gè)階段的數(shù)
2、學(xué)模型組成,生產(chǎn)階段為簡(jiǎn)化的黑油模型,測(cè)試階段為流線模型是由測(cè)試井發(fā)出的每條流線建立的方程聯(lián)立而成,可考慮非均質(zhì)性及流體參數(shù)變化:其次,形成了水平井的流線數(shù)值求解方法。流線方法將水平井的三維滲流問(wèn)題轉(zhuǎn)化成了一維問(wèn)題,計(jì)算速度快,穩(wěn)定性好。第三,研究了表皮系數(shù),井筒存儲(chǔ)系數(shù)、儲(chǔ)層相對(duì)厚度、水平井的位置、縱向與橫向滲透率比值、儲(chǔ)層非均質(zhì)性、混合邊界、油水粘度及不同井網(wǎng)條件下水平井的壓力響應(yīng)特征。最后,將雙種群遺傳算法應(yīng)用于水平井流線數(shù)值試井中,編制了水平井流線數(shù)值試井解釋軟件,可以解釋井筒存儲(chǔ)、表皮系數(shù)、滲透率分布
3、等參數(shù),并將軟件應(yīng)用于礦場(chǎng)中,解釋結(jié)果符合實(shí)際生產(chǎn)。水平井流線數(shù)值試井方法考慮因素多,對(duì)油藏的描述更加準(zhǔn)確,具有很大的應(yīng)用價(jià)值。關(guān)鍵詞:水平井,流線,數(shù)值試井,遺傳算法StreamlineNumericalWelltestingInterpretationMethodforHorizontal"臺(tái)llsJiaWeixia(Oil&GasFieldDevelopmentEngineering)DirectedbyProf.YaoJunAbs仃actWithmoreandmoreapplicationofhoriz
4、ontalwellintheoil—gasfielddevelopment,thetraditionalmethodbasedonanalyticsolutioncannotaccuratelyexplainhorizontalwelltestingdatainhighwater-cutstage.Soitisnecessarytodevelopanewhorizontalwellnumericalwelltestinginterpretationmethodthatcanexactlydescribether
5、ealreservoir.Byintroducingstreamlinenumericalwelltestingtechnology,horizontalwellsstreamlinenumericalwelltestinginterpretationmethodisdeveloped,whichCanconsidermanycomplexfactors,suchaSproductionhistory,heterogeneity,wellpatternandSOon.Firstly,horizontalstre
6、amlinenumericalwelltestingmodelisestablished,whichincludestwomodels,onefortheproductionperiod,andtheotherfortestingperiod.Theformeristhesimplifiedblackoilmodelandtheotherisstreamlinemodelwhichiscomposedofallequationsforeverystreamlinearoundthetestingwell.The
7、streamlinemodelcantakeformationheterogeneityandfluidpropertiesintoconsideration.Secondly,horizontalwellstreamlinenumericalsolvingmethodisformedandthestreamlinemethodtransformsthethreedimensionalseepageproblemofhorizontalwellintoonedimensionalproblem,whichhas
8、hilghcomputingspeedandgoodstability.Thirdly,thepressureresponseindifferentconditionsisstudiedincludingskinfactor,wellstorage,reservoirrelativethickness,thepositionofthehorizontal,verticalandhori