this paper present numer densiti deriv approach anoth phase numer welltest which each fluid densiti around wellbor measur use generat pressur equival each phase use simplifi pressuredens correl well new statist deriv method determin each fluid phase permeabl averag effect permeabl system new empir model also densiti relat radial flow equat each fluid phase deriv semilog specialis plot densiti versus horner time use estim relat each phase result from 2 exampl oil gas condens reservoir show deriv fluid phase pressuredens equival display same wellbor reservoir fingerprint convent bottomhol pressur bpr method also indic averag effect rang between 43 57 scenario exampl 10 404 scenario exampl 20 use new fluid phase empir model estim this within valu use simul model likewis estim from convent bpr method result also discov all six scenario investig heavier fluid water weight averag pressuredens equival all fluid give exact effect convent bpr method this approach provid estim possibl fluid phase permeabl each phase contribut flow given point henc sever stabilis point relat can generat

Victor Torkiowei Biu

Shi-Yi Zheng

A New Approach in Pressure Transient Analysis: Using Numerical Density Derivatives to Improve Diagnosis of Flow Regimes and Estimation of Reservoir Properties for Multiple Phase Flow

model limeston reservoir tradit develop appli tecton fractur concept planar discontinu has been simul dynam without consid nonplanar discontinu sedimentari breccia vug fault breccia impact breccia assum all nonplanar discontinu tecton fractur caus confus contradict reservoir character the differ geometri connect each discontinu affect fluid flow generat challeng develop specif analyt model describ quantit hydrodynam behavior breccia vug fractur focus oil flow limeston reservoir this paper demonstr differ between type discontinu affect limeston reservoir recommend all discontinu should includ simul staticdynam character becaus impact fluid flow demonstr differ differ analyt model develop find work base observ core outcrop tomographi valid field data the explan mathemat model develop here could use diagnost tool predict fluid veloc fluid flow limeston reservoir improv complex reservoir staticdynam character

Nelson Barros-Galvis

Pedro Villaseñor

Fernando Samaniego

Analytical Modeling and Contradictions in Limestone Reservoirs: Breccias, Vugs, and Fractures

the purpos paper examin various doe method uncertainti quantif product forecast dure reservoir manag consid all uncertainti analysi can time consum expens uncertainti screen use experiment design method help reduc number paramet manag size howev adopt various method more often base experiment discret compani practic this most done littl attent been paid risk associ decis eman from exercis the consequ underperform project when compar actual valu project this studi present analysi three famili design use screen four doe method use respons surfac model dure uncertainti analysi the screen method sensit one factor atatim fraction experi plackettburman design were critic examin analyz use numer flow simul the model method boxbehnken central composit doptima full factori were program analyz capabl reproduc actual forecast figur the best method select case studi recommend were made best practic select various doe method similar applic

Akeem O. Arinkoola

David O. Ogbe

Examination of Experimental Designs and Response Surface Methods for Uncertainty Analysis of Production Forecast: A Niger Delta Case Study

this studi present novel approach bundl tube model permeabl impair due asphalteneinduc format damag attenu ultrasound which has been rare attend avail literatur model use chang asphalten particl size distribut apsd function time due ultrasound radiat while consid surfac deposit pore throat plug mechan the propos model predict experiment data permeabl reduct dure coinject solvent asphalten oil core reason agreement viscos variat due sonic crude oil use determin fluid mobil appli model the result model indic fluid sampl expos ultrasound may caus much less asphalteneinduc damag insid porous medium sensit analysi model paramet show optimum time period dure which best stimul effici observ the result work can help better understand role ultrasound prohibit dynam behavior asphalten deposit porous media furthermor present model could potenti util model other timedepend particl induc damag

Arash Rabbani

Mohammad Hossein Ghazanfari

Mahmood Amani

Asphaltene Formation Damage Stimulation by Ultrasound: An Analytical Approach Using Bundle of Tubes Modeling

oilbas mud obm formul soybean oil extract from soybean use soxhlet extract method the formul soybean mud properti were compar diesel oil mud properti the compar properti were rheolog properti yield point gel strength mud densiti filtrat loss properti fluid loss filter cake the result obtain show soybean oil mud exhibit bingham plastic rheolog model applic low yield point gel strength when compar diesel oil mud the mud densiti measur show soybean obm slight higher than diesel obm mud densiti valu 810 gal 798 gal respect barit content 10 addition filtrat loss test result show soybean mud fluid loss volum water oil were 13 10 respect compar diesel oil mud volum 15 12 furthermor filtrat loss test indic soybean oil mud filter cake thick 2 had cake characterist thin soft while diesel oil mud result filter cake thick 25 cake characterist firm rubberi comparison previous publish work literatur soybean oil mud exhibit superior rheolog filtrat properti over other veget oilbas mud therefor formul soybean oil mud exhibit good drill mud properti would compar favour those diesel oil mud its filter cake characterist thin soft desir signific avert stuck pipe dure drill oper mean oilbas drill mud could formul from soybean oil

Okorie E. Agwu

Anietie N. Okon

Francis D. Udoh

A Comparative Study of Diesel Oil and Soybean Oil as Oil-Based Drilling Mud

the abil optim drill procedur econom involv simul understand effect oper paramet equip design have rop analysi appli drill perform model optim drill oper has been conduct address issu this studi show how optimum oper paramet equip can predict simul drill oper preexist well northwest louisiana field refer well data gather process predict drillabl format encount invert bit specif rop model solv rock strength the output data generat refer well format simul upcom well compar analysi conduct between predict result actual result show accuraci simul signific higher accuraci shown between simul actual drill result once simul were valid optimum drill paramet equip specif were found vari differ combin weight bit wob rotari speed rpm hydraul bit specif until highest drill rate achiev each well qualit quantit analysi optim result conduct assess potenti oper econom benefit drill oper

David Hankins

Saeed Salehi

Fatemeh Karbalaei Saleh

An Integrated Approach for Drilling Optimization Using Advanced Drilling Optimizer

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Journal of Petroleum Engineering

Journal of Petroleum Engineering