钻井液物性参数对深水钻井井筒温度压力的影响

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1、中国石油大学（华东）硕士学位论文钻井液物性参数对深水钻井井筒温度压力的影响姓名：宁立伟申请学位级别：硕士专业：油气井工程指导教师：管志川20080401TheEffectsofDrillingFluid’SPhysicalPropertiesontheTemperatureandPressureinDeepwaterDrillingNingLiwei(Oil&GasWellEngineering)DirectedbyProfessorGuanZhichuanAbstractneedofOilandGasisincreasingtoday,butOil

2、andGasisbecominglessandless．MoreandMoremarineOilandGasisexploredandexploited，andseadepthtendstodeeperanddeeper．Alsokindsofdifficultiescomellp，needtobesolvedsoon．Naturally,deepwaterdrillingisbecominghotterandhotter．Lowtemperature，highpressure，highporepressureandlowfracturepressu

3、recommonlyexistindeepwaterdrillingandalwayscauseaccidents．Weexpectanewmethodtoforecastthetemperatureandpressureinthewellbore．Sointhisthesis，wehaveestablishedamodeltocalculatethetemperatureandpressureinthewellbore．Wemakesomeameliorationonthebasisofothers’research，including：densi

4、tyandtheologicalbehaviorofdrillingfluidaredeemedasafunctionoftemperatureandpressure；theeffectofcuttings，frictionalheatandpressure-dropheataretakenintoconsideration；what’Smore，thetemperatureandpressureinthewellborearecoupledcalculated．Wehavemadeanewprogramaccordingtoalloftheseme

5、ntionedaboveandgotmoreaccurateresults．Thisprogramcallshow1lStemperatureprofiles，pressureprofiles，densityprofiles，viscosityprofiles，downholetemperatureandpressurecurves，equivalentcirculatingdensityprofiles，equivalentstaticdensityprofilesinthewellboreandtemperatureprofilesinthefo

6、rmationwhenthedrillingfiuidiseithercirculatingornot,whichareimportantfordrilling，cementing，wellcontrol，casingdepthdesign．Inthispaper,wealsocompleteparametricsensitivityanalysis，findtheprimary-parametersaffectingthetemperatureandpressureinthewellbore，givesomereasonableadvices．Ke

7、ywords：Deepwaterdrilling，Temperature，Pressure，Numericalsimulation,Parametricsensitivityanalysis符号表温度：乙—钻柱内钻井液温度，℃瓦—环空内钻井液温度，℃％—钻柱内表面温度，℃乙—钻柱外表面温度，℃瓦—海水温度，℃乃一地层温度，℃L一隔水管内表面温度，℃乙一隔水管外表面温度，℃直径：厶—钻柱内径，mnl‰—钻柱外径，ll砷以-地层段井壁内径，姗九一隔水管内径，tuTTI厶一隔水管外径，TTml吃—温度不受扰动的井径，mm以一隔水管隔热层内径，衄丸～隔水管隔

8、热层外径，咖对流换热系数：％—钻柱内表面对流换热系数，W／(m2．K)k—钻柱外表面对流换热系数，W／(m2