SPE Workshop: Rate/Pressure Transient Analysis in Unconventional Reservoirs - Solutions for Practical Problems 7 - 11 Dec 2020 San Luis Resort Virtual

Agenda

Tuesday, December 08

07:00 - 08:00
08:00 - 08:15
08:15 - 10:00
Session 1: Start-Up: What's Hot, What Should be Hot
Session Chairpersons Dilhan Ilk, DeGolyer and MacNaughton; Tom Blasingame, Texas A&M University

In this opening session, we provide some (recent) historical perspectives and developments. In addition, we consider "what's hot, what's not" topics such as single versus multi-well performance analyses, assessment of completions efficiency/effectiveness from well performance data, etc. We also consider "next phase" technologies/methodologies for PTA, RTA, and DCA with an invited speaker(s). Lastly, the ATW co-chairs provide orientation and expectations for the workshop.

10:00 - 10:30
10:30 - 12:00
Session 2: Advanced Modelling (Advanced Numerical Modeling, Anomalous Diffusion, Heterogeneity)
Session Chairpersons Vincent Artus, KAPPA Engineering; Erdal Ozkan, Colorado School of Mines; Neha Bansal, DeGolyer and MacNaughton; Tyler Conner, Devon

This session discusses the incorporation of petrophysical heterogeneity, fluid-phase intricacies, and geometrical complexity of unconventional reservoirs in advanced models for PTA/RTA. In particular, modeling and data analysis challenges due to multiple scales of heterogeneity and pore-size dependence of phase saturations will be addressed. The sensitivity of our current modeling approaches to heterogeneity (including anomalous diffusion, reduced-order models, stochastic formulations, etc.) and the quantification of uncertainty in heterogeneity characterization and flow regime identification will be covered. 

 

Presentations

Transient Multiphase-Flow Models for Dual-Porosity Formations with Capillary Effects
Ilkay Uzun, Halliburton

Random Discrete Fracture Modeling for Transient Flow Analysis in Unconventional Reservoirs
Mohamed Mohamed, Apache
Revisiting Conventional Concepts, Techniques , and Models, to Applied Them in Unconventional Reservoirs
Alex. R. Valdes-Peres, Texas A&M University
12:00 - 13:30
13:30 - 15:00
Session 3: Optimistic and Deterministic Production Forecasting: Human Nature, or Just Nature?
Session Chairpersons John Lee, Texas A&M University; David Jones, Cimarex Energy Co.; Baosheng Liang, Chevron; Dilhan Ilk, DeGolyer and MacNaughton

The investment community has raised serious concerns in recent months about the accuracy of published production forecasts for shales, with critics concluding that many (or most) published forecasts are optimistic and unsuitable as the basis for investment decisions. These forecasts are often deterministic, with no assessment of inherent uncertainty. This session will address the problems that critics have identified, possible causes of the problems (real or perceived), and potential solutions to these problems.

 

Presentations

Shale Trouble
Chris Matthews and Rebecca Elliott, Wall Street Journal

Communicating Empirical Production Forecast Uncertainty to Investors and Decision Makers
Mark McLane, Rose & Associates
The World Is Round… And Other Misconceptions
David Fulford, Gryphon Oil and Gas
15:00 - 15:30
15:30 - 17:00
Session 4: Case Histories I
Session Chairpersons James Ewert, IHS Markit; Tyler Conner, Devon; David Jones, Cimarex Energy Co; Walt Dobbs, Anadarko; Dave Anderson, Saga Wisdom; Bertrand Theuveny, Schlumberger; Steve Jones, Cimarex Energy Co
Speaker(s) Soodabeh Esmaili, OXY; Trevor Ingle, Devon; Braden Bowie, Apache

Case history presentations provide insight through examples of innovative applications of rate-transient and pressure-transient methodologies in various unconventional reservoirs. The intent of these sessions is to assess theoretical considerations, practical applications, and ultimately provide insights into such questions as: What worked? What didn’t work? What’s critical? What are the next steps?
These sessions provide a unique venue for discussions related to the current application and future potential of RTA/PTA methods and how their results may be implemented as part of an integrated asset management workflow.

 

Presentations

Leveraging Pressure Responses of Monitoring Wells to Improve Unconventional Reservoir Simulation Workflow: Permian Case Study
Soodabeh Esmaili, OXY

Well to Well Interference: Quantifying Connectivity and Understanding How Much is Too Much? A STACK Case Study
Trevor Ingle,  Devon
Analysis and Interpretation of Pressure Data from the HFTS 1
Tiffany Li, Pioneer Natural Resources
17:00 - 18:30

Wednesday, December 09

07:00 - 08:00
08:00 - 09:30
Session 5: Multiphase Modeling for PTA/RTA/DCA
Session Chairpersons Walt Dobbs, Anadarko; Vincent Artus, KAPPA Engineering; Basak Kurtoglu, Quantum Energy Partner; Dave Anderson, Saga Wisdom

This session covers evolving best practices for production data analysis and modeling of multiphase systems. This includes analytical and numerical techniques. Analytical techniques have historically been single-phase only, but have been (and are currently being) modified to accommodate multiple mobile phases in the reservoir. Numerical models have advanced in terms of efficiency/speed as well as ease of use, making them very popular among practitioners of multiphase RTA. Imaginative combinations of these techniques is yielding new insights into multiphase flow behavior in unconventional reservoirs.

 

Presentations

Impact of Overly Conservative GOR Forecasts on Reserves Estimates
John Lee, Texas A&M University

Production Performance Evaluation Including Capillary Pressure and Relative Permeability Effects
Bob Poe, Consultant
Application of Fractional Dimension RTA and Simplified Multiphase Modeling
Jorge Acuna, Chevron
09:30 - 10:00
10:00 - 11:30
Session 6: Phase Behavior Related to Production Performance
Session Chairpersons Neha Bansal, DeGolyer and MacNaughton; Baosheng Liang, Chevron; Birol Dindoruk, Shell

This session addresses the effects of phase behavior on production performance. Potential topics include: in-situ fluids vs actual production (nanopore PVT, adsorption, molecular sieving); effects of phase behavior on anomalous diffusion; application of field-wide EOS; variation in fluid characteristics over small distances due to migration or source type; effects of PVT and drawdown schedule on ultimate recovery estimates.

 

Presentations
 In-Situ Fluids Molecular Sieving
Erdal Ozcan, Colorado School of Mines

Variation in Fluid Type Intra-Formation due to Migration, Fractionation, or Source
Curtis Whitson, Whitson AS

Forecasting Through Inferred Reservoir Modeling
Ashish Dabral, Shale Value
11:30 - 13:00
13:00 - 14:30
Session 7: Geomechanics in Reservoir Performance/Reservoir Modeling
Session Chairpersons David Craig, Occidental Oil & Gas Corporation; Kumar Ramurthy, Bayswater; Mariano Suarez, YPF; Tyler Conner, Devon

This session will explore geomechanical effects on reservoir behavior and our methods for incorporating these effects in rate and pressure transient analyses (RTA and PTA) and reservoir/fracture modeling. It has been shown that, in unconventional plays, formation geomechanics play an important role in our understanding of development and fracturing strategies. Potential topics include: flowback analysis; drawdown management; assessment and characterization of the source(s) of reservoir damage and natural/hydraulic fracture conductivity losses; and 3–D geomechanical modeling and resulting hydraulic fracture characterizations.

 

Presentations
Far-Field Deformation and Pressure Measurements Suggest Unpropped Fractures Retain Conductivity
David Craig, OXY

Geomechanical Influences on Completion Effectiveness – Field Cases Review
Nicolas Garcia, Phoenix Global Resources

Analysis of Communicating Multi-Fractured Horizontal Wells Using the Dynamic Drainage Area Concept
Chris Clarkson, University of Calgary
14:30 - 15:00
15:00 - 16:30
Session 8: Case Histories II
Session Chairpersons James Ewert, IHS Markit; Tyler Conner, Devon; David Jones, Cimarex Energy Co; Walt Dobbs, Anadarko; Dave Anderson, Saga Wisdom; Bertrand Theuveny, Schlumberger; Steve Jones, Cimarex Energy Co

Case history presentations provide insight through examples of innovative applications of rate-transient and pressure-transient methodologies in various unconventional reservoirs. The intent of these sessions is to assess theoretical considerations, practical applications, and ultimately provide insights into such questions as: What worked? What didn’t work? What’s critical? What are the next steps?
These sessions provide a unique venue for discussions related to the current application and future potential of RTA/PTA methods and how their results may be implemented as part of an integrated asset management workflow.

 

Presentations
An Integrated Numerical Modeling Study to Evaluate Multi-well Interference for Well Spacing Optimization
Pavan Vajjha, Devon

Compositional Gas Reinjection Modeling in Tight Sands in Argentina
Luisa Sanches de Almeida, FDC Group

Coupled versus Stratified Flow of Water and Hydrocarbon during Flowback and Post-flowback Processes: Eagleford Oil and Gas Case Studies
Hassan Dehghanpour, University of Alberta

Thursday, December 10

07:00 - 08:00
08:00 - 09:30
Session 9: 2D and 3D Multi-Well Interaction/Interference ("Parent-Child" Interactions)
Session Chairpersons David Craig, Occidental Oil & Gas Corporation; Dilhan Ilk, DeGolyer and MacNaughton; Richard Cao, Shell; Kumar Ramurthy, Bayswater; Sebastien Matringe, Hess Corporation; Erdal Ozkan, Colorado School of Mines

Put simply, understanding and quantifying multi-well interaction in unconventional reservoirs is still problematic. Operators have been experimenting with different "recipes," but no universal success is evident. This session attempts to frame the discussion around such questions as: What has worked? What has not worked? What is missing? What needs to be done? Practical applications of rate-transient analysis and numerical simulation, along with theoretical developments, will be key discussion topics.

 

Presentations

Predicting Infill Performance in the Marcellus
Saul Rivera, Chesepeake

Fiber-Optic Sensing Based Production Logging and Well Interference Testing – Methodology and Examples
Kyle Friehauf , ConocoPhillips
Using Power Law Behavior for Well-to-Well Connectivity, Fracture System Connectivity, and Reservoir Quality for Development Decisions
Mark Murray, Sage Rider, Inc.
09:30 - 10:00
10:00 - 11:30
Session 10: Data Analytics in Well Performance Assessment
Session Chairpersons Sebastien Matringe, Hess Corporation; Bertrand Theuveny, Schlumberger; Richard Cao, Shell; David Jones, Chesapeake Energy Corp

Data analytics methods and machine learning algorithms can “scan” large volumes of data, extract relationships between datasets, and highlight internal correlations between different sets of factors. This session will cover the individual elements of the data analytics workflows for unconventional plays. We will cover the processes for data cleansing and metadata collection/standardization. In addition, we consider the analysis and interpretation of the insights provided by various machine learning methods and attempt to address the following questions: What are the present challenges for building the predictive models? What data sources have proven to be the most reliable? What metrics of performance are best suited for quality and reliable insights? What are the best strategies for defining the training and test sets? What are the best uses of the resulting models?

 

Presentations
Downhole High Frequency and High Resolution Flowrate Measurement Enables Both PTA and RTA in Unconventionals – A Bakken Case Study
Lawrence Camilleri, Schlumberger
Model Mining for Accurate Production Forecasting in Unconventionals
Darryl Fenwick, Kappa

Principal Component Analysis for Production Prediction in Unconventional Reservoirs
Maria Magdalena Rodriguez, YPF

11:30 - 13:00
13:00 - 14:30
Session 11: Integration of PTA/RTA/DCA with Modeling
Session Chairpersons David Jones, Chesapeake Energy Corp; Neha Bansal; DeGolyer and MacNaughton; John Lee, Texas A&M University; Dilhan Ilk, DeGolyer and MacNaughton; Bertrand Theuveny, Schlumberger

This session will highlight examples of how operators are using PTA/RTA results to affect numerical modeling practices. The discussion will include example cases of using analytical modeling results as a direct input to the workflow or using methodologies to cross-validate key findings and hypothesis. Presentations will consider the effect of data integration on results such as estimation of reservoir properties, drainage volumes/size, and the estimation of hydraulic fracture properties.

 

Presentations

Insights Gained by Coupling RTA and Microseismic Analysis: A Case Study from the Permian Basin
Doug Angus, ESG Solutions

MDH Plots Using Fall Off Data after a Fracture
Mike Sullivan, Chevron
Pulse Testing with a Novel Analysis for a Fully Developed Winerack in the DJ Basin
Jessica Barhaug, Great Western
14:30 - 15:00
15:00 - 16:30
Session 12: Case Histories III
Session Chairpersons James Ewert, IHS Markit; Tyler Conner, Devon; David Jones, Chesapeake Energy Corp; Walt Dobbs, Anadarko; Dave Anderson, Saga Wisdom; Bertrand Theuveny, Schlumberger; Steve Jones, Cimarex Energy Co

Case history presentations provide insight through examples of innovative applications of rate-transient and pressure-transient methodologies in various unconventional reservoirs. The intent of these sessions is to assess theoretical considerations, practical applications, and ultimately provide insights into such questions as: What worked? What didn’t work? What’s critical? What are the next steps?
These sessions provide a unique venue for discussions related to the current application and future potential of RTA/PTA methods and how their results may be implemented as part of an integrated asset management workflow.

 

Presentations

Integrating Big Data and Fundamental Studies to Investigate the Impact of Frequent Shut-ins on Well Performance
Peng Ye, Equinor

Numerically Enhanced RTA in Oil Wells – Improving Estimates of Linear Flow Parameter and Hydrocarbons in Place
Braden Bowie, Apache
Effective RTA-Based Calibration for Numerical Hydraulic Fracture and Reservoir Flow Simulations in the Turner Formation
Adrian Morales and David Gurney, Chesapeake Energy