Applied Reservoir Engineering - jogmec.go.jp

1 _____ Applied Reservoir Engineering (Page 1 of 7) Dr. Maghsood Abbaszadeh (IPS, Inc.) Innovative Petrotech Solutions, Inc Applied Reservoir Engineering Instructor: Dr. Maghsood Abbaszadeh Duration: 5 days Level: Basic-Intermediate Course Description This course covers a wide range of topics of interest to those who practice Reservoir Engineering or those who want to gain a deeper understanding of practical aspects of Reservoir Engineering . The first chapter of the course reviews fundamentals of Reservoir Engineering concepts and helps solidify the background of participants in Reservoir types, fluid analysis/PVT, petrophysics, core analysis and Reservoir heterogeneity.

2 Subsequently, various deterministic and probabilistic methods of industry-established reserve estimation and reserve classification are described. Next, the physics of fluid flow in porous media along with well testing practices of oil and gas wells are described. Primary drive mechanisms, well and Reservoir performance techniques under various well completion and well geometry conditions are addressed, and production forecasting is covered. Numerous number of examples, exercises and hands on problem solving sessions in the form of workshop are included throughput the course in various sections and are aimed at exposing the participants to Applied topics in Reservoir Engineering and in strengthening their understanding level.

3 Hand-picked case studies from reservoirs throughout the world further enhance the course. Participants are encouraged to bring in their own case studies and problems for classroom discussions and cross-transfer of knowledge. Course Learning Upon completion of this course, participants will have built competence in their ability to assess Applied Reservoir Engineering methods to: Perform reserve estimates using volumetric methods, decline curve analysis, material balance applications, modern production analysis and probabilistic methods Assess and classify reserves using industry standard definitions Estimate hydrocarbon-in-place (OIP, GIP)

4 By deterministic and stochastic methods along with associated uncertainty and risk analysis Apply principles of flow through porous media to a variety of Reservoir Engineering applications Estimate well performance for volumetric, gas cap and water drive reservoirs Select appropriate well completion configurations fr improved well production Apply inflow/outflow relationships for well deliverability Participate in multidisciplinary efforts to propose well workover and development planning Target Audience This course is targeted to Reservoir engineers, geologists, geophysicists, production engineers and drilling engineers at beginning or intermediate level of 1-5 years experiences.

5 Those with more industry experience who also wish to expand their knowledge base will also benefit from this course. _____ Applied Reservoir Engineering (Page 2 of 7) Dr. Maghsood Abbaszadeh (IPS, Inc.) Innovative Petrotech Solutions, Inc Course Content 1. FUNDAMENTALS AND OVERVIEW Reservoirs and Classification o Conventional Reservoir types o Effective reservoirs and examples o Reservoir static pressure o Exercise: RFT and PLT for pressure gradient analysis o Data requirements petroleum Fluid Properties and Analysis o Oil and gas physical properties, Formation volume factors o Exercise: determination of a Reservoir fluid type o PVT and PVT experiments o Fluid sampling and Separator test o Example: PVT adjustment to separator condition o Exercise.

6 Fluid-in-place calculation o Phase behavior, Phase equilibrium and flash calculations o Examples o Workshop: abandonment pressure for a gas field Petrophysics o Porosity and permeability o Permeability prediction methods, Hydraulic flow units o Examples of permeability predictions, worldwide reservoirs o Exercise: building k- relationship from core data o Pore volume compressibility: effect of consolidation o Capillary pressure and Leverett J-function o Static Reservoir fluid distributions o Workshop: calculating saturation profile in a Reservoir o Relative permeability and examples Core Analysis o Coring methods and acquisition: sidewall, whole core, handling, preservation o Routine core analysis methods, CCAL o Special core analysis methods, SCAL o Illustrative examples Heterogeneity Measures o Dykstra-Parson method o Lorenz method o Examples o Exercise: calculating Dykstra-Parson coefficient, VDP 2.

7 RESERVE ESTIMATES Volumetric Methods o Net pay setting, Cutoff criteria o Example of net pay: turbidite deposits in GoM o Workshop: net pay determination _____ Applied Reservoir Engineering (Page 3 of 7) Dr. Maghsood Abbaszadeh (IPS, Inc.) Innovative Petrotech Solutions, Inc o Volume calculations o Planimeter data integration o Example of volume calculation with planimeter data o Exercise: calculating OIP and GIP in a compartmentalized Reservoir Decline Curve Analysis o Basics, definitions and models o Arps empirical method - Formulation - Example - Exercise 1: calculation of well s life and cumulative recovery - Exercise 2: impact of acidization on decline curve and reserves o Fetkovitch models - Dimensionless solution - Type curve - Examples - Workshop.

8 8-year gas field production history analysis - Field case 1: production data analysis of Clear Fork-Texas with water injection (decline curve reinitialization) - Field case 2: Impact of recompletions on decline curve in Field E o Modern decline curve analysis - Variable rate production - Blasingame type curve - IPI type curve - Examples - Example/Exercise: Tight gas well in North Mexico o Well performance indicators other than flow rate - Solution gas drive, Rs - WOR - Example Material Balance o Gas reservoirs Material balance formulation P/Z plot analysis Water influx effect Workshop: Reserve calculation by P/Z and comparing with volumetric Special consideration in tight gas sands Example o Oil reservoirs General material balance formulation Gas cap effect Water influx effect Examples Exercise: calculating OOIP in solution gas drive Reservoir Case study.

9 OIP in layered sandstone field in Edmonton-Canada _____ Applied Reservoir Engineering (Page 4 of 7) Dr. Maghsood Abbaszadeh (IPS, Inc.) Innovative Petrotech Solutions, Inc Workshop: determining drive mechanism and OOIP Reserve Classifications o Definitions: Reserve vs. Resource o Analogy technique o Deterministic technique - Volumetric - Primary recovery efficiency - Example: Jay field - Workshop: calculation of deterministic reserves - Simulation method o Probabilistic technique - Definition of pdf and cdf statistical functions - Proved, probable, possible reserves - Examples o Uncertainty - Sources of uncertainty - Oil-in-place and reserves uncertainty calculations - Tornado chart and ranking of OIP reserves - Monte Carlo simulation - Example: impact of uncertainty in WOC on reserves o Exercise.

10 Estimating gas-water contact for reserve calculation 3. FLUID FLOW IN POROUS MEDIA Basic Concepts and Equations o Darcy law and flow potential o Permeability anisotropy and heterogeneity o Exercise: average permeability in a heterogenous whole core o Flow in complex geometries o Workshop: driving flow solution in direct line drive pattern Potential, Streamline and Steady-State Flow o Diffusivity equation o Potential and streamline functions o Anisotropy o Well patterns o Examples o Exercise: developing potential function for a well near an aquifer Pressure Transients and Well Testing o Line source solution o Wellbore storage and skin o Drawdown and Reservoir limit tests o Example: limit test calculations o Exercise: analyze a pressure transient drawdown test o Superposition in time and space o Pressure buildup tests o Average Reservoir pressure _____ Applied Reservoir Engineering (Page 5 of 7) Dr.