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# WELL PERFORMANCE PETE 324

Texas A&M

GPA 3.72

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This 4 page Study Guide was uploaded by Lenore Medhurst on Wednesday October 21, 2015. The Study Guide belongs to PETE 324 at Texas A&M University taught by Staff in Fall. Since its upload, it has received 364 views. For similar materials see /class/225887/pete-324-texas-a-m-university in Petroleum Engineering at Texas A&M University.

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Date Created: 10/21/15

Petroleum Engineering 324 7 Reservoir Performance Exam 1 Study Guide TA Blasingame Ilk 7 Spring 2008 Course Objectives to be Evaluated by Exam 1 Course Objectives These are minimum skills to be achieveddemonstrated The student should be able to Exam 1 0 Sketch pressure versus time trends and pressure versus distance trends for a reservoir system which exhibits transient pseudosteadystate and steadystate flow behavior 0 Derive the material balance relation for a slightly compressible liquid oil in the presence of other phases gas and water as well as the material balance relation for a dry gas 0 Derive the steadystate flow equations for horizontal linear and radial flow of liquids and gases including the 1 an p m r 1 i Develop and apply relations for pseudosteadystate flow in closed black oil or dry gas reservoir systems 0 Derive the quotskin factor variable from the steadystate flow equation and be able to describe the conditions of dam age and stimulation using this skin factor 0 Derive and manipulate the diffusivity equations for the radial and linear flow of single and multiphase uids liquids and gases through porous media 0 Define and use dimensionless variables and dimensionless solutions to illustrate the generic performance of a particular reservoir model Given a particular set of parameters for a specified reservoir model the student should be able to use dimensionless solutions to predict the performance of the specified reservoir system 0 Derive the analysis and interpretation methodologies ie quotconventionalquot plots and type curve analysis for pressure drawdown and pressure buildup tests for liquid gas and multiphase flow systems 0 Define and apply the pseudopressure and pseudotime concepts for the analysis of well test and production data from dry gas and solutiongas drive oil reservoir systems Study Session for Exam 1 Monday 17 March 7 500 to 730 pn17R1CH 106 Wednesday 19 March 7 Starting at 700 pm Rch 101 and 114 Petroleum Engineering 324 7 Reservoir Performance Exam 1 Study Guide TA Blasingame llk 7 Spring 2008 MniProblems to be Covered by Exam 1 exam problems are based on these problemstopics MniProblems The student should be able to solve the following types of problems 7 as well as variationsextensions of these problems Exam 1 Study Session for Exam 1 Monday Exam Wednesday 19 March 7 Starting at 700 pm Rch 101 and 114 Mini Problem 01 PTA Introduction 7 Be able to explain objectives of well testing estimation of properties pressures performance rate etc 7 Be able to identify plots used in well testing Cartesian semilog and loglog plots and the purpose of each 7 Be able to plot a given data set on different coordinate systems Mini Problem 02 Calculation of the Pressure Derivative Function quotWell Testing Derivative 7 Be able to compute the pressure derivative function using backward forward and central difference techniques 7 Be able to explain the differences between the derivative estimation techniques 7 Be able to explain the effect of errors associated with the data in the derivative computation Mini Problem 03 Skills Evaluation Math 7 Be able to apply fundamental knowledge of calculus and algebra 7 Be able to nd the slope and intercept of various data models linear exponential and powerlaw models Mini Problem 04 Well Test Plots 7 Be able to sketch the corresponding pressure pro le of a well during a production sequence 7 Be able to identify and label the events which take place during the production sequence 7 Be able to estimate the absoluteopen ow AOF potential of a well using 4point test data Mini Problem 05 Material Balance 7 Be able to derive and apply the material balance relation for a volumetric slightly compressible oil system 7 Be able to derive and apply the material balance relation for a volumetric dry gas system 7 Be able to state the key issuesfactors for applying the material balance equation to a reservoir system 7 Be able to explain average reservoir pressure determination and its importance 7 Be able to explainapply the material balance relation for a dry gas reservoir with water in ux 7 Be able to explainapply the material balance relation for an abnormally pressured dry gas reservoir Mini Problem 06 Derivation of the p2 Flow Relation from Darcy39s Law SteadyState Flow 7 Be able to derive the steadystate ow equations for horizontal linear and radial ow of liquids all forms 7 Be able to sketchthe pressure versus distance trend for a reservoir system which exhibits steadystate ow behavior 7 Be able to explain the quotradius of investigation concept based on transient radial ow Mini Problem 07 Skin Factor 7 Be able to derive the quotphysicalquot skin factor model for a zone of altered permeability near the well radial ow case 7 Be able to describe the conditions of damage and stimulation using the physical radial skin factor concept 7 Be able to derive and apply the quotapparent wellbore radius concept for the near well skin factor transient ow Mini Problem 08 PseudosteadyState Flow PSS Behavior 7 Be able to derive the general relations forPSS ow in a closed black oil reservoir system 7 Be able to sketch the pressure versus distance trends for a reservoir that exhibits PSS ow behavior 7 Be able to sketch the pressure versus time trends for a reservoir that exhibits PSS ow behavior 7 Be able to derive and apply the equivalent constantrate PSS ow relation assuming random owrate and pressure 7 Be able to create aPSS plotting function for estimating reserves assuming a constant bottomhole pressure Mini Problem 09 Pseudosteady State PSS Flow Behavior Constant Wellbore Pressure Case 7 Be able to derive the exponential rate decline relation material balance equation combined with PSS ow equation 7 Be able to obtain an expression for the cumulative production using the exponential rate decline relation PSS ow 7 Be able to develop a quotconstant pressure material balance relation PSS ow Mini Problem 10 Pseudosteady State PSS Flow Behavior Estimating VolumeinPlace and Drainage Area 7 Be able to apply the PSS ow relation to eld data to obtain the in place uid volume and reservoir drainage area Mini Problem 11 Diffusivity Equation 7 Be able to develop the diffusivity equation for singlephase uid ow in radial or linear horizontal ow system 7 Be able to state the variables in the diffusivity equation for singlephase oil and gas ow 7 Be able to state the assumptions limitations and applications of the diffusivity equation 7 Be able to state the dimensionless variables and dimensionless solutions for a particular reservoir model 7 Be able to de ne and apply the pseudopressure and pseudotirne relations for dry gas reservoir systems Petroleum Engineering 324 7 Reservoir Performance xam 1 Study Guide TA BlasingameD 11k 7 Spring 2008 17 March 7 506 to 730 pm 7R1CH 106 MiniProblem 5 Continue d Study Session for Exam 1 Monday 17 March 7 500 to 730 pm 7R1CH 106 Exam 139 Wednesday 19 March 7 Starting at 700 pm Rch 101 and 114 0 Mini Problem 12 Solution of the Diffusivity Equation E1x and logx Approximations 7 Be able to state the reservoir solutions for transient radial ow ie in niteacting homogeneous reservoir 7 Be able to explain the difference between the E1x and logx solutions recall both are approximations 7 Be able to compute and sketch the DRAWDOWN pressure versus distance trends for the following cases I Steadystate I Pseudosteadystate and I Transient radial ow solutions 7 Be able to compute and sketch the BUEDUP pressure versus distance trends for the transient radial ow case 0 Mini Problem 13 Derivation of the SteadyState Radial Gas Flow Relation Pseudopressure Calculation 7 Be able to apply the and pressure A f rmnlati quot for gas ow cases 7 Be able to obtain the pressure pro le in the reservoir using for the singlephase gas ow solutions 7 Be able to compute the pseudopressures numerically using the trapezoidal rule 0 Mini Problem 14 Example Pressure Drawdown Test Analysis Semilog Analysis 7 Be able to apply the transient radial ow solution for the analysisinterpretation of a pressure drawdown test 7 Be able to identify and label the ow regimes which are typically observed during a pressure drawdown test 7 Be able to use the pressure drop derivative to identify ow regimes which occur for a pressure drawdown test 0 Mini Problem 15 Derivation of the Pressure Buildup Test Analysis Formulation Using Convolution 7 Be able to derive the general result for a variablerate test sequence assume undistorted in niteacting radial ow 7 Be able to convert the variablerate formulation into a general analysis relation hint the Apq formulation 7 Be able to derive the quotHomerquot equation for apressure quotbuildupquot test sequence 7 Be able to derive the quoteffective time relation for a pressure quotbuildupquot test sequence 7 Be able to develop and apply the skin factor result for use in quotHornerquot analysis 0 Mini Problem 16 Derivation of the quotMuskatArpsSmith LateTime Pressure Buildup Test Analysis Method 7 Be able to derive the quotMuskatArpsSmith plotting functions for the determination of the average reservoir pressure 7 Be able to apply the quotMuskat ArpsSmith plotting functions using latetime pressure buildup test data 0 Mini Problem 17 Example Pressure Buildup Test Analysis Semilog Analysis 7 Be able to apply the Horner At and Ate plotting functions to analyze pressure buildup data for transient radial ow 7 Be able to identify and label the ow regimes which are typically observed during a pressure buildup test 7 Be able to use the pressure drop derivative to identify ow regimes which occur for a pressure buildup test 7 Be able to explain the difference between using At and Ate for the analysis of a pressure buildup test Petroleum Engineering 324 7 Reservoir Performance xam 1 Study Guide TA BlasingameD 11k 7 Spring 2008 Petroleum Engineering 324 7 Reservoir Performance Exam 1 Study Guide TA Blasingame llk 7 Spring 2008 Course Outline Date Topic Readin 7 quotOld Notesquot Module 1 Introductory Materials January 14 M Course IntroductionReview of Syllabus Syllabus 7 Spring 2008 16 W Objectives ofWell T N D 39 Ui 39 39 m 39 39 Mod1701 Mod1702 Mod1703 18 F Discussion of reservoir models and properties that can be obtained Mod1703 21 M University Holiday 23 W Plots used in well testing Cartesian semilog and loglog plots Mod1703 Module 2 Fundamentals of Flow in Porous Media 25 F Material balance concepts constant compressibility and dry gas systems Mod2701 28 M Steadystate ow concepts Liquid and gas systems Mod2702 30 W Steadystate ow concepts Development of the radial flow skin factor Mod2702 February 01 F Pseudosteadystate ow concepts Derivation of prpwf f 17W and prprt relations Mod2703 04 M Pseudosteadystate ow concepts Example applications Mod270 06 W Development of the diffusivity equation Liquid and gas systems Mod2704 Mod2705 08 F Transient flow concepts E1x and log approximation solutions other nonradial solutions and reservoir r 439 39L 39 4 Pt 39 p d t d t t and transient radial ow text reading Module 3 SolutionsModels for Well Test Analysis 11 M Dimensionless variables 7 radial flow diffusivity equation Mod3701 13 W Solutions of the diffusivity equation various solutions Mod3702 15 F Solutions of the diffusivity equation concept of quottype curves Mod3702 18 M Variablerate convolution General case Mod3703 20 W Wellbore Phenomena Well completions as these pertain to well testing handouts 22 F Wellbore Phenomena Derivation ofwellbore storage modelsexample analysis applications Mod3704 25 M Variablerate convolution Singlerate pressure drawdown case Mod3703 Module 4 Well Test Analysis 27 W Variablerate convolution Singlerate pressure buildup case Mod3 03 Mod4701 29 F Well test analysis Conventional analysis ofpressure drawdownbuildup test data Mod3703 Mod304 Mod4701 March 03 M Well test analysis Conventional analysis of pressure drawdownbuildup test data Mod3703 Mod3704 Mod4701 05 W Well test analysis Conventional analysis of pressure drawdownbuildup test data Mod3703 Mod3704 Mod4701 07 F Well test analysis Analysis ofgas well tests M Spring Break 1014 March 2008 1 M Well test analysis Analysis ofgas well tests Mod2705 Exam 1 19 W Well test analysis Radial ow case quotBourdetGringarten type curve Mod4702 21 F Reading Day No Classex7 Good Friday 24 M Well test analysis Radial ow case Faulted reservoir case quotStewartquot type curve Mod4703 26 W Well test analysis a ial ow case Radial composite case quotTang and Brighamquot type curve Mod4703 28 F Well test analysis Fractured wells dimensionless conductivity and penetration Mod4704 M Well test analysis Fractured wells type curve analysis Mod4704 April 02 W Well test analysis Dual porosity reservoir case introduction Mod4705 04 F Well test analysis Dual porosity reservoir case type curve analysis Mod4705 07 M Design ofwell tests text reading 09 W Software for the analysis ofwell test data handouts 11 F Software for the analysis ofwell test data handouts Module 5 Analysis and Modeling of Production Data in preparation 14 M Analysis of production data Introduction Mod5701 16 W Analysis of production data Empirical analysisforecasting of production data Mod5701 18 F Analysis of production data Empirical analysisforecasting of production data Mod5701 21 M Analysis of production data Deliverability testing Mod5702 23 W Analysis of production data FetkovichMcCray decline type curve analysis Mod5703 Exam 2 25 F Analysis of production data FetkovichMcCray decline type curve analysis Mod5703 28 M dead day Software for the analysis of production data handouts 29 T redefined day quotFriday Software for the analysis of production data handouts May 07 W Project Due by 500 pm Common Exam Dates These are night exams starting at 700 pm Exam 1 7 Wednesday 19 March RICH 101 and 114 Exam 2 7 Friday 25 April RICH 101 and 114 Study Session for Exam 1 Petroleum Engineering 324 7 Reservoir Performance Monday 17 March 7 0 to 730 pm 7RlCH 106 Exam 1 Study Guide Exam 139 TA BlasingameD 11k 7 Spring 2008 Wednesday 19 March 7 Starting at 700 pm RICH 101 and 114

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