Put us to the test.

Optimizing well tests with associated test design and analysis services to deliver the quality of data you require to make informed reservoir management decisions, while minimizing costs

Drillstem test tools

Early production facilities

Heavy-duty wireline fishing

Life-of-field production facilities

Produced water systems

Slickline services

Tubing-conveyed perforating systems

Well-testing systems

Completion

Production

Intervention

Drilling

Evaluation

Well-Test Design and Analysis Services

Testing & production services

As one of the world’s largest providers of well testing, Weatherford has the equipment and know-how to run a wide range of tests, which in turn deliver data that inform reservoir management decisions. But our services extend far beyond execution. They also encompass test design and data analysis, critical to yielding meaningful results, while minimizing costs.

Our results-oriented focusWeatherford has built an extensive portfolio of technologies and related expertise to perform tests in exploration, appraisal and development wells.

Our breadth of testing capabilities

Exploration and appraisal wells

During exploration and appraisal well testing, we obtain critical data—such as formation fluid properties, pressure, temperature, flow rates and permeability—that can help you assess the commercial potential of a reservoir, as well as cost-effectively develop its underlying resources. Drillstem test (DST) tools, formation testers and software applications are among the technologies we incorporate to execute the tests and analyze the results.

Development wells

Test objectives in development wells include optimizing field performance, diagnosing production problems and ensuring compliance with environmental regulations. We offer standard in-line testing packages, which minimize emissions and avert interruption to production, as well as flowmetering. Our flowmetering technologies include the Alpha VS/R and VS/R-D multiphase flowmeter and the compact Red Eye® multiphase metering system (REMMS) partial-separation flowmeter. Both are suitable for space-constrained environments and both incorporate advanced Red Eye technology, which measures water cut.

Well-Test Objectives

Well Type Primary Objectives

Exploration and appraisal

Assessing the reservoir’s commercial potential

Determining reservoir boundaries, including drainage area

Characterizing the reservoir and obtaining formation fluid data to inform future drilling and completion decisions

Development

Optimizing well and field performance

Diagnosing production-related problems

Evaluating the effectiveness of stimulation treatments

Validating export meters

Ensuring compliance with environmental regulations

Well-Test Design and Analysis Services

© 2011 Weatherford. All rights reserved.2 © 2011 Weatherford. All rights reserved. 3

Whether you are in the exploration or development stage of your operation, we apply a basic, four-step process to testing your wells.

Our phased approach

Simplifying well-test design and analysis with propriety software. Making its commercial debut more than 20 years ago, our PanSystem software is a powerful well-test analysis application. Equipped with a simulation function, it can also be used to optimize the design of well tests before execution.

In addition to providing well-test design and analysis services, we help you leverage test data to its fullest potential by providing access to experts in a wide range of complementary disciplines, including: Well construction; laboratory services; openhole and cased-hole completions; artificial-lift systems, including gas-lift systems and submersible pumps; and chemical services.

1. DesignIn well testing, one size does not fit all. Your client needs and operating conditions vary from project to project, necessitating customization. We work closely with your representatives (typically geologists, geophysicists and reservoir engineers) to design tests that deliver the data you require to make informed reservoir management decisions and, ultimately, to maximize recovery. Sources of input can include seismic surveys, surface logging, wireline logging and other reservoir evaluation methods. Simulations run with proprietary software also influence test design. A well designed test delivers accurate, meaningful data that meets your predetermined reservoir management objectives.

We design well tests first in accord with your reservoir management objectives. Additional input typically includes previously acquired data and software-based simulations.

Client objectives

Offset well data

Surface logging

Core sample analysis

Seismic surveys

Wireline logging and formation testers

Logging-while-drilling

Software-based simulations

Test Design Input

In shale-gas applications, the

new Pansystem 2012 module

analyzes production data,

such as rate-decline analysis.

This mechanistic approach

allows slickwater-treatment

success to be assessed

in terms of the three key

physical parameters.

Specialized plots for infinite-

acting linear flow and

flowing material balance at

semi-steady states are also

available. New PDA-type

curves of the Agarwal-

Gardner form—based on

spanning fractures in a

closed rectangle—have

been introduced and

are consistent with the

concept of a stimulated

reservoir volume.

Shale Gas Production Decline Analysis

4. AssessmentEvery test cycle concludes with a post-analysis assessment to ensure that we have met your reservoir assessment and management objectives, as defined in the design phase, and to optimize future tests in the same reservoir.

2. ExecutionWith access to an extensive portfolio of well-testing technologies and associated expertise, we select appropriate equipment and personnel in accord with the test design, ensuring the safety and well-being of personnel during testing operations. We then commence testing on your exploration, appraisal or development well. In addition

to acquiring data, we can transmit them securely to client-specified off-site personnel in real time.

3. AnalysisWe leverage proprietary well-test analysis software,

including our PanSystem® and PanMesh™ applications, and internal expertise to analyze, validate and interpret

data. In addition to performing these functions, we can train your personnel in well-test data analysis and

interpretation. As a diversified oilfield services company, we also offer access to experts in a wide range of complementary disciplines—such as well construction, laboratory services, completion design and artificial-lift systems. These experts can assist you further in maximizing the value of test data.

Design

GO

Execution

GO

Analysis

GO

Assessment

GO

Well-Test Design and Analysis Services

5© 2011 Weatherford. All rights reserved.4 © 2011 Weatherford. All rights reserved.

The man who wrote the book on well-test design and analysis. With more than 35 years of well testing and reservoir engineering experience, Dr. George Stewart currently serves as Weatherford’s

Chief Reservoir Engineer. In addition to sharing his wealth of knowledge with clients, he has played an instrumental role in training our personnel. He joined Weatherford in 2004 after we acquired the company he founded, Edinburgh Petroleum Services, as part of a concerted effort to expand our well-testing capabilities. Outside of his corporate experience, Dr. Stewart has held several roles at Heriot-Watt University’s Institute of Petroleum Engineering since its inception in 1975, including senior lecturer (1975–1978), department head (1981–1986) and adjunct professor (1986–present). And he recently authored the Pressure Transient Analysis series, which includes two books—Volume I: Well Test Design & Analysis and Volume II: Formation Testing and Well Deliverability with Complex Reservoir Material Balance—and companion CD-ROMS, all available through PennWell® Books.

Cultivating expertise through training. We use a series of specialized, modular courses to train our personnel, as well as third parties, on how to design effective well tests and to interpret the resulting data. Successive waves of oil and gas professionals, from operator and service communities alike, have taken the specialized courses since they made their debut more than two decades ago. Refined continuously to reflect new developments in the discipline of well-test design and analysis, the courses incorporate numerous case studies to illustrate key concepts. We offer them at a dedicated site in Edinburgh, UK; Weatherford training centers throughout the world; and, by request, at client facilities. In addition to training, an active competence assurance program helps us assess the well-testing skills of our personnel on an ongoing basis.

Weatherford draws on decades of relevant experience and extensive training to provide you with the value-added expertise so critical to effective well testing.

Our depth of expertise

Real Results

Australia: Weatherford Applies New Testing Technique to Improve Assessment of CBM Reservoir’s Production Potential

Historically, the complex relationship between stress, porosity and permeability in coalbed methane wells has challenged accurate forecasting of the production potential of CBM reservoirs. However, by incorporating a stress-dependent porosity and permeability (SDPP) pseudomodel—developed by Weatherford—into well-test analysis in Australia, we acquired more accurate information about the permeability of the reservoir-at-large, the reservoir structure and drainage area, and effective pore volumes. This data contributed to a better understanding of the reservoir’s production potential and informed completion decisions.

Our track recordWeatherford draws on more than 30 years of experience in the well-testing service business. We have built an extensive range of capabilities and competencies in well testing and production services, to the point that we have become the fastest growing multinational service provider within this sector. We have one of the largest portfolios, including wellhead and surface process equipment, multiphase flowmetering, drillstem test tools, slickline services, tubing conveyed and wireline perforating, openhole and cased-hole logging, well-test design and analysis, surface and downhole data acquisition, real-time secure data transmission, and pressure/volume/temperature (PVT) sampling and laboratory services.

Globally, we perform thousands of jobs per year with hundreds of testing packages, covering well cleanups, frac flowbacks, in-line production tests, exploration/appraisal well tests, extended well tests, and early production facilities. We have provided well-testing services to clients throughout the world.

Select Well-Test Courses and Topics

A key issue in natural fracture

systems—such as cleats in

coal seams—is pore pressure

or net effective stress on

bulk fracture permeability.

An innovative unconventional

gas CBM (coalbed seam)

gas function has been added

to Pansystem 2012 that

addresses this issue using a

stress-dependent porosity and

permeability pseudopressure

method—based on Palmer

and Mansoori’s linear-

elasticity model—to optimize

drawdown on CBM wells for

optimal dewatering rates

under pumping.

Coalbed Methane (CBM)

Course Topics

Well-Test Analysis: Introductory/Intermediate Level

Constant pressure boundary effects (gas cap and strong aquifer)Gas-well testingPressure transient analysis in drawdown and buildup Semi-infinite system late transient analysis (fault effects)Steady-state radial flow theoryWell-test designWellbore storage and type-curve analysis

Well-Test Analysis: Advanced Level

Advanced well-test designDeconvolution Fractured wellsHorizontal wellsMultiphase flow and gas condensate well testingRadial composite systems: injection well falloffsVariable rate situations, including permanent downhole gauge (PDG) application

Well-Test Interpretation in Complex Reservoirs

Advanced fault interpretation Dual-porosity behavior (naturally fractured reservoir)Layered well testingLimited entry and double permeability systemsNon-ideal wellbore storageNumerical methods, using PanMesh™ softwareDual-cell compartmentalized systems

PennWell is a registered trademark of PennWell Corporation.

Well-Test Design and Analysis Services

76 © 2011 Weatherford. All rights reserved.© 2011 Weatherford. All rights reserved.

weatherford.comWeatherford products and services are subject to the Company’s standard terms and conditions, available on request or at weatherford.com. For more information contact an authorized Weatherford representative. Unless noted otherwise, trademarks and service marks herein are the property of Weatherford and may be registered in the United States and/or other countries. Weatherford products named herein may be protected by one or more U.S. and/or foreign patents. For more information, contact patents@weatherford.com. Specifications are subject to change without notice. Weatherford sells its products and services in accordance with the terms and conditions set forth in the applicable contract between Weatherford and the client.

© 2011 Weatherford. All rights reserved. 7161.00

To learn more about optimizing your next well test with our four-phased approach—design, execution, analysis and assessment—contact an authorized Weatherford representative or visit weatherford.com.

Well-Test Design and Analysis Services

Put us to the test.