Well Test Design And Analysis Pdf

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well test design and analysis pdf

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Design and interpret well tests with confidence in fractured environments with the industry-leading naturally fractured reservoir NFR pressure transient simulator. Model your fractures explicitly and calibrate with pressure transient tests to determine which fractures matter and which do not. GeoTesting services can be applied to conventional, unconventional, and hydraulically or naturally fractured reservoirs with multiple wells and multiple layers.

Well test design & analysis

Issaka, M. Pressure derivatives have been shown to be more sensitive to disturbances in the reservoir than pressure signals; resulting in more detail on derivative graphs than is apparent on pressure graphs. The semilog pressure derivative is widely used in well test analysis. One reason for its popularity is that, for radial systems, the response appears as a horizontal line during the infinite-acting radial flow period, resulting in easier identification. However, when the semilog pressure derivative is applied to flow geometries other than radial, the responses are not horizontal; making identification of flow regimes more difficult. Thus, a generalized pressure derivative is necessary to simplify the identification of flow regimes in any flow geometry.

It is a robust yet easy-to-use software tool that provides multiple options for models and analysis. These options include industry standards as well as user-defined models for additional flexibility. Ultimately, the PanSystem application provides a way to simplify complex transient well testing through detailed analysis, simulation and reporting. PanSystem software is dedicated to transient well testing, a key technical function in the oil and gas industry. A pressure transient well test has the unique capability to obtain information from within the reservoir surrounding the well and, with appropriate testing and analysis techniques, can provide a wealth of data: Permeability of the reservoir-at-large and, in some cases, the nearwellbore region Completion efficiency, effective open interval size over the life of the well Reservoir structure boundaries, heterogeneities Reservoir pressure Nature of any pressure support Drainage area, connected pore volume, and initial hydrocarbons in place Vertical permeability, vertical communication in layered systems Well performance over the life of the well Communication between wells Deliverability and production forecasts Typical permanent downhole-gauge record spanning 15 months of rate changes and shut-ins, planned and unscheduled. PanSystem software analyzes a wide range of situations and asset types. Low-pressure reservoirs, heavy oil: Wellbore fill-up and leak-off tests, steam-injection tests Pumping wells: Acoustically derived pressures and rates Medium oil reservoirs: Conventional drawdown and buildup tests Gas wells: Conventional analysis using real gas pseudo-pressure, turbulent skin analysis for high-rate wells, and gas well deliverability by empirical C-and-n and LIT methods.

An aquifer test or a pumping test is conducted to evaluate an aquifer by "stimulating" the aquifer through constant pumping , and observing the aquifer's "response" drawdown in observation wells. Aquifer testing is a common tool that hydrogeologists use to characterize a system of aquifers, aquitards and flow system boundaries. A slug test is a variation on the typical aquifer test where an instantaneous change increase or decrease is made, and the effects are observed in the same well. This is often used in geotechnical or engineering settings to get a quick estimate minutes instead of days of the aquifer properties immediately around the well. Aquifer tests are typically interpreted by using an analytical model of aquifer flow the most fundamental being the Theis solution to match the data observed in the real world, then assuming that the parameters from the idealized model apply to the real-world aquifer. In more complex cases, a numerical model may be used to analyze the results of an aquifer test, but adding complexity does not ensure better results see parsimony. Aquifer testing differs from well testing in that the behaviour of the well is primarily of concern in the latter, while the characteristics of the aquifer are quantified in the former.

Institute of Petroleum Engineering Well Test Analysis

An integrated approach to well test interpretation is emphasized throughout the course. Class exercises involving hand calculations and simple spreadsheet applications will reinforce the concepts covered in class. Concepts will be illustrated by both synthetic data sets and real field examples. Participants will be able to apply the knowledge and skills in their job assignments upon course completion. This course includes the use of computers. CONTENT: Introduction to well testing Radial flow Log-log type curve analysis Pressure transient testing for gas wells Flow regimes and the log-log diagnostic plot Bounded reservoir behaviour Wellbore and near-wellbore phenomena Well test interpretation Well test design Estimation of average drainage area pressure Hydraulically fractured wells Horizontal wells Naturally fractured reservoirs.


Penn Well Corporation, p. ISBN Part 1 Petroleum engineers face the daily challenges of designing and testing.


GeoTesting

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The well-testing analysis is performed in two consecutive steps including identification of underlying reservoir models and estimation of model-related parameters. The non-uniqueness problem always brings about confusion in selecting the correct reservoir model using the conventional interpretation approaches. Many researchers have recommended artificial intelligence techniques to automate the well-testing analysis in recent years.

Well testing is one of the important methods to provide information about the reservoir heterogeneity and boundary limits by analyzing reservoir dynamic responses. Despite the significance of well testing data, misinterpreted data can lead us to a wrong reservoir performance prediction. The analysis was conducted on both homogeneous and naturally fractured reservoirs in infinite-acting and finite-acting conditions. Additionally, in all cases, a sensitivity analysis was performed on parameters affecting interpretation process.

Well Testing; Well Test Analysis

Using current analysis techniques to evaluate your data? Our consultants combine well test pressure transient and advanced decline rate transient analysis to better understand your conventional and unconventional shale reservoirs. Upstream professionals rely on us to:. A Global energy company set out to find opportunities for greater efficiency in extracting oil from unconventional reservoirs and developed a steam-assisted gravity drainage production solution that now saves millions of dollars annually by reducing the need for maintenance and risk of interruptions. To gain an advantage in highly competitive energy markets, this industry leader leverages rapid, accurate analysis of global oil and gas projects -- from exploration to concept selection and field plan development -- that save time and deliver insights by comparing cost scenarios and production profiles. Well Testing Applications Poster. Well Testing Fundamentals Poster.

Using current analysis techniques to evaluate your data? Our consultants combine well test pressure transient and advanced decline rate transient analysis to better understand your conventional and unconventional shale reservoirs. Upstream professionals rely on us to:. While seeking oil and gas development opportunities in the Rocky Mountains region, this Denver-based company has increased workflow efficiency by using a new platform that displays research based on users' preferences, delivers hours of time-savings each week and enables greater focus on high-level analysis.

Finding the right technical data guide for designing and testing wells can be daunting. This is filled with advanced information on a variety of wellbore topics. From ascertaining accurate reservoir descriptions, to the intricacies of designing a horizontal well program, it covers every topic in detail. The volume includes a CD with four additional chapters that offer unique technical insight. Read more

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