注水开发油田储采比的分析方法_陈元千(2)

参 考 文 献

1 陈元千.双曲线递减的简化及确定可采储量的截距法.天然气工

业,1994,14(4):32~37

2 陈元千,赵庆飞.油气田储采比变化关系的研究.断块油气田,

1999,6(6):23~26

(本文编辑:滕春鸣 收稿日期1999-08-09)

4

四、 符号及单位注释

储采比,a;

NR 原始可采储量,或称为总可采储量或最

终可采储量,我国简称为可采储量,104t;

NRR 开发到某一时间的剩余可采储量,10t;

NP 开发到某一时间的累积产量,104t;NPI 产量上升阶段的累积产量,10t;NPS 产量稳定阶段的累积产量,10t;

sNp

44

4

产量稳定阶段的某一开发时间的累积

产量,10t;

4

dNp

产量递减阶段的某一开发时间的累积

4

产量,10t;

Npmax 当t tmax时,产量递减阶段的最大

FAULT-BLOCKOIL&GASFIELDJANUARY2000mulatingmechanismsaresummaried.

SubjectWords:Fracturedsystem,Oilandgasdistributionpattern,Chenjiareversefault,Lengjiare-gioninLiaoheBasin.

gineeringmethods.

SubjectWords:Oilandgasfields,Reservespro-ductionratio,Equation,Features.

ClassificationandOptimizationofIn-InterpretationMethodforLowResistiv-ityReservoirinDongyingFormationintheEastofDagangOilField.

LiHao(WellLoggingCompany,DagangOilField(Group)Co.Ltd.,Tianjin300280,P.R.Ch-ina).DuankuaiYouqitian2000,7(1),27-30Combiningthegeologicsedimentarybackgroundwiththereservoirlithologicstructure,theoriginmechanismoflowresistivityreservoirisstudied.Itisconcludedthatthespecialityofgeologicconditionsisthebasicreasonsforforminglowresistivityreser-voir,andpointsouttheweakhydrodynamicdepos-itionisthemajorgeologicconditionsforconcentrateddistributionoflowresistivityreservoir.Theintergrateinterpretationmethodsaredevelopedcombiningwithlithologicandirreduciblewateranalysisonthebaseofgeologicanalysis.Fairlygoodapplicationresultisob-tainedinDongyingFormationoftheSecondAreaintheeastofDagangOilField.

SubjectWords:Geologicsedimentaryback-ground,Reservoirlithologicstructure,Lowresistiv-ityreservoir,Weakhydrodynamicdeposition.

creasecurves.

YuQitai(ScientificResearch

Instituteof

PetroleumExplorationandDevelopment,CNPC,Be-ijing100083,P.R.China).DuankuaiYouqitian20007(1),34-41

Theproposedincreasecurvesforpredictingoilfielddevelopmentindexeshavebeenclassified.Intermsofnumberofconstants,termofcontainingbtortb,andcriterioncorresponding(tQt)maxandQtmax,theincreasecurvesaredividedintofourtypes:(1)theincreasecurvesofbttypewithnon-fixingcriterionand3constants;(2)theincreasecurvesoftbtypewithfixingcriterionand3constants;(3)theincreasecurvesorbttypewithnon-fixingcriterionand4con-stants;(4)theincreasecurvesoftbtypewithnon-fix-ingcriterionand4constants.TherelationshipsofNp-t,NpNRmax

Qt-t,and

NpNRmax

(tQ)

criterion,and

tmax

Q

criterion,andformulasforobtainingpa-tmax

rametersoftheseincreasecurvesarelisted.According

studiesandanalysesforcalculatingmaximumrecov-erablereservesNRmaxandcorrelationcoefficientofaactualoilfield,QingzujiOilfield,sampledrandomlybyusingabove-mentionedincreasecurvesandtheirin-itialproductionQi,maximumrangeof

Np

NRmax

tQ

AnalysisMethodofReserves-ProductionRatioforWater-FloodingOilfield.

ChenYuanqian;etal.(ScientificResearchInst-ituteofPetroleumExplorationandDevelopment,CN-PC,Beijing100083,P.R.China).DuankuaiYouqi-tian20007(1),31-33

Reserves-productionratio(RPR)ofoilandgasfieldsisdefinedastheratioofremainingrecoverablereservestoannualoilproductionatthesameyear.Notonlyisitimportantfactorofthedevelopmentinoilandgasfields,butalsoitiscloselyrelatedtostableproductionsituationintheoilfield.Forwater-floodingdevelopmentoilfield,thispaperproposestherelation-alexpressionswhichcandetermineRPRatthestableproductionstageanddeclineproductionstage,alongwithtodeterminechangingfeaturesbyreservoiren-

tmax

criterionandeasylevelobtainingparameters,thebestincreasecurve,YuQitaiincreasecurveofbtypewithnon-fixingcriterionand3constants(3Y1in-tcreasecurve),Np=NRmax,havebeenscreend-b+a

edinthem.AndWeibullincreasecurveoftbtypewithfixingcriterionand3constants(3Wincreasecurve),Np=NRmax(1-e-Np

tionalcurvewhileN

Rmax

t/a

b

),canregardasaadd-i>0.5.Studiesandap-

Qtmax

plicationofincreasecurvesshowthattheproposedincreasecurvemethodisanewreservoirengineering