Three‐dimensional seismic monitoring of an enhanced oil recovery project

Greaves, Robert J.; Fulp, Terrance J.; Head, Phil

doi:10.1190/1.1893670

Cited by 6 publications

(2 citation statements)

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“…Time-lapse seismic analysis revealed that time varying changes in reservoir properties, such as temperature, pressure and fluid content, can cause corresponding changes in both seismic character (Greaves et al 1983) and petrophysical properties (Nur et al 1984) of the reservoir. Therefore, the study of fluid properties as a function of temperature and pressure is mandatory.…”

Section: Methods To Compute Seismic Properties Of Co -Contaminated Aqumentioning

confidence: 99%

On seismic monitoring of $$\hbox {CO}_{2}$$ CO 2 leakage from geological storages and its primary detection

et al. 2014

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Geological storage of CO 2 in mature sedimentary basins and deep saline water aquifer requires special considerations on the potential leakage pathways. Early detection of CO 2 leakage from geological storage is one of the primary objectives of any carbon capture and storage technique. Thermodynamic properties of injected CO 2 and formation fluid, and change in in-situ conditions may act as driving agent to CO 2 leakage. Therefore, it is important to monitor the saturation of CO 2 and identify the phase of CO 2 during the injection, storage and after storage stages in order to monitor its possible migration and leakage risks. Seismic monitoring of sequestrated CO 2 in subsurface is in practice in which Gassmann fluid substitution model is used to estimate porous rock and pore fluid properties. The seismic properties of CO 2 contaminated fluids are predicted by Wood's volume average formula. The analysis reveals that Wood's approach is unable to account properly the properties of fluid mixture especially near bubble point pressure of CO 2 /water mixture, thus unable to monitor primary leakage of CO 2 . A modified approach based on thermodynamics is adopted for the detection of primary leakage of CO 2 . The analysis shows that for a minute amount of free CO 2 , the P-wave velocity is much lower than the values predicted by the GassmannWood approach. The resulting normal reflectivity and AVO anomalies are much stronger than attained by conventional Gassmann-Wood approaches.

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Section: Methods To Compute Seismic Properties Of Co -Contaminated Aqumentioning

confidence: 99%

On seismic monitoring of $$\hbox {CO}_{2}$$ CO 2 leakage from geological storages and its primary detection

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Early research in time-lapse seismic analysis revealed that timevarying changes in reservoir properties, such as temperature and fluid content, can cause corresponding changes in both seismic character (Greaves et al, 1983) and petrophysical properties (Nur et al, 1984) that are detectable under appropriate conditions. In later studies (Landro, 1999;Lumley et al, 2003), 4D seismic anomalies were inverted to yield quantitative estimates of oil saturation and pore pressure over time.…”

Section: Introductionmentioning

confidence: 99%

4D seismic modeling and CO2 pressure-saturation inversion at the Weyburn Field, Saskatchewan

Meadows

Cole

2013

International Journal of Greenhouse Gas Control

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Recent advances in geophysical technology: introduction and review

Christie

Robein

2005

PGC

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Inm any basins ande specially thosei nNW Europe, 3Dseismic datah aveb ecomeanecessary prerequisiteto development,appraisaland, almost routinely,exploration drilling, but equally theyarerarely seen asbeingsufficient.Whyist his,whent he majority ofi ndustry analysts recognizethe valueof3Dseismic data to ano ilcompany's exploration portfolio:a reg eophysicistst oo successful atm arketing?Arewevictims of promisingtoo much, or shouldwesee thishungerfor everm oresubsurface information asencouragement to refineexistingtechnologiesfurtherandto develop newones? InSeptember2 002,the GeologicalSociety meetingon exploration inv olcanic margins hearda bout a successful strategyof'drillingthe bumps',which led to the discovery ofthe Marjun hydrocarbon accumulation, the first inFaroesewaters. Petex2002 wastoldthatthe biggest UK NorthSea discovery for adecade had not used 'geophysicalm alarkey'. Iss eismic technologyinadequate, or hasitr eached its limits ast he targets getever tougher? Evidently,a st he remainingb asins becomec overed bys eismic surveys,the easy findsareb ecomingf ewer. Havingc onsumed roughly halfthe world's provenr eserves,newr eservesm ust be foundusinge verm ore imaginativeg eologicalhypotheses,a ndremotesensingtechnologiesw ill need to givea ccess to everm ore information andprovide discrimination to test the hypothesesandreduce the risk. The quest for resolution isu nrelentinga ndfi ners patials amplingi sp rovidingsignificant improvementsin imaging.Honouringwell information requiresm orerealistic, anisotropic velocity models for pre-stack depth migration which furnishimagesthatarebetterrepresentations ofthe drillablegeology. The need to qualifythe datainaseismic surveyhasresulted insomany auxiliary measurementsofthe acquisition systemitselfthatthe subsurface dataa rea lmost inaminority,b ut thisbringsimproved, quantified repeatability,withthe potential to drived own time-lapseseismic noisea ndreveals ubtle, production-related reservoirchanges. Qualified amplitudesandcareful control duringprocessingallow inversion for elastic parameters ofthe subsurface.With goodpetrophysicalandgeomechanicalmodels,elastic inversionscanbenefitboththe reservoirengineerandthe drillerandofferfurtherp otentialfor multi-component acquisition inr eservoircharacterization.Salt,b asalt or complextectonic overburdens posetheirown challengestoimagingandencourage potentialfieldmeasurements to complement seismic datainvelocity modelbuildingandthe prediction ofreservoirrocksorfluids. Very long offsets andvery low seismic frequenciesmayalso havearôleto playintheseenvironments. Breakthroughsin datah andlingandvisualization technologyallow us to take full benefitoftheseimprovements. The stimulus for innovation isasstrongaseverand, evenif the immediateeconomic context isuncertain,the industry isresponding.Thispaperwill reviewseveralofthe current technologytrendsandoffersomespeculation on the road ahead.

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Three‐dimensional seismic monitoring of an enhanced oil recovery project

Cited by 6 publications

References 0 publications

On seismic monitoring of $$\hbox {CO}_{2}$$ CO 2 leakage from geological storages and its primary detection

On seismic monitoring of $$\hbox {CO}_{2}$$ CO 2 leakage from geological storages and its primary detection

4D seismic modeling and CO2 pressure-saturation inversion at the Weyburn Field, Saskatchewan

Recent advances in geophysical technology: introduction and review

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