Pressure Transient Data from Wireline Formation Testers : When and How to use it?

Ramaswami, Shyam; Hows, Melton Paul; Frese, Daniela; Dong, Chengli; Elshahawi, Hani

doi:10.2118/164733-ms

All Days 2013

DOI: 10.2118/164733-ms

|View full text |Cite

Pressure Transient Data from Wireline Formation Testers : When and How to use it?

Shyam Ramaswami

Melton Paul Hows

Daniela Frese

et al.

Abstract: The use of pressure transient data in the field of Formation Testing in efforts to describe productivity and permeability of reservoirs is considered mature technology, particularly when applied to data collected through production testing. The extension of this technique to data obtained using Wireline Formation Testers, where either a single probe or a straddle packer is used to propagate a pressure pulse into a reservoir, has been gaining momentum in the industry over the past decade, however the integratio… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2015

2017

Publication Types

Select...

Other3

Relationship

Self Cite0

Independent3

Authors

Journals

Cited by 3 publications

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Assessing Macroscopic Dynamic Permeability Through Pressure and Noise Analysis

Aslanyan¹,

Aslanyan²,

Farakhova

2015

Day 2 Tue, September 15, 2015

View full text Add to dashboard Cite

One of the common applications of Pressure Transient Analysis and Pressure Pulse Testing is the evaluation of formation permeability that is referred to as dynamic permeability and is then used to calibrate permeability distribution from a geological model before running full-field flow simulations. In practice, though, the correlation between permeability from pressure tests and that predicted from open-hole logs is often poor and does not provide consistent calibration because of many factors including poor core data, poor porosity-permeability, complex pressure transient responses and others. In many cases, inaccurate dynamic permeability values are due to misinterpretation of flowing thickness. In this paper, we demonstrate how Spectral Noise Logging can pick the boundaries of actual flow units and enable the accurate determination of effective thickness to substantially improve the correlation between dynamic and open-hole permeabilities.

show abstract

Assessing Macroscopic Dynamic Permeability Through Pressure and Noise Analysis

Aslanyan¹,

Aslanyan²,

Farakhova

2015

Day 2 Tue, September 15, 2015

View full text Add to dashboard Cite

show abstract

Dynamic Reservoir Characterization from Microbuildups with Formation Tester

Azari

Khan

Jambunathan

et al. 2016

SPE Annual Technical Conference and Exhibition

View full text Add to dashboard Cite

Historically, drillstem tests (DSTs) have been considered the standard for establishing the productive capacity of oil and gas reservoirs, providing measurements, such as formation pressure, permeability, and skin factor. In a recent study, the possibility of obtaining similar results was investigated by using wireline formation testing tool. The pressure-transient data obtained during the fluid-sampling cleanout operation was used to obtain reservoir properties. Of particular interest, spherical and radial flow models were successfully fit to very short buildup times (on the order of a few minutes) after pumpouts. To obtain similar formation properties from the shorter duration buildup times associated with flowline surging to clean debris (on the order of seconds), a process referred to as "sneezing" was investigated, yielding comparable results. Sneezing is performed several times during the fluid pumpout and sampling operation. Repetitive analyses of these microbuildups along with other pressure buildup periods in one pumpout location can help reduce uncertainty with respect to the estimation of formation properties. This paper presents three examples, including both oil- and gas-bearing formations, ranging in terms of lithology, permeability, and pressure. Formation permeability, skin damage, and reservoir-pressure values were evaluated from pressure-transient analyses during pumpouts. Results clearly demonstrate that zonal thickness, permeability, and anisotropy are key contributors to microbuildup analysis. Evaluation of reservoir properties is performed in real time with this approach to help optimize field-development plans. Analyzing these microbuildups is a unique method for supplementing/replacing the standard longer-duration pressure-transient analysis at the lowest-possible cost to the operator.

show abstract

Using Wireline Formation-Tester Data for Reservoir Characterization and Connectivity Determination in Ultradeepwater and High-Pressure Wilcox Formation in Gulf of Mexico

Azari

Hadibeik

Eyuboglu

et al. 2017

SPE Annual Technical Conference and Exhibition

View full text Add to dashboard Cite

Deepwater turbidite reservoirs have always presented several reservoir characterization challenges. Determining the complex architecture of the sand bodies, correlating them across multiple wells in the structure, and defining the sedimentological facies to determine the reservoir vertical communication and boundaries are some challenges in these Gulf of Mexico (GOM) turbidites. Other formation-related challenges of turbidite reservoir exploration and development include understanding reservoir rock quality and compartmentalization, as well as the identification of fluids. Deepwater exploration and development require innovative, cost effective evaluation technologies—technologies that help manage ultradeep and high-pressure environments. Having a detailed description of reservoir properties, fluids characterization, and a determination of the reservoir connectivity are crucial for understanding the reservoir and optimizing the field development plan. This study describes the wireline formation tester (WFT) operations performed in a harsh environment [ultradeepwater subsalt formation (> 32,000 ft) and high pressure (> 25,000 psi)] to obtain pressure data, establish gradients, evaluate vertical connectivity using vertical interference tests (VITs), check for compositional variation in different oil columns, and obtain clean formation fluid samples. Downhole fluid analysis was performed to help ensure the quality of formation samples and determine the fluid compositional analysis in real time during pumpout. To obtain high quality fluid samples while minimizing costs, an innovative technology—namely, a focused sampling probe—was used, eliminating the need for long pumpouts. Representative formation fluid samples were captured from three sample depths in approximately two hours per sample depth with minimum oil-based mud (OBM) contamination (< 5%). All the available openhole log data were integrated to understand the reservoir before running the WFT. Optimizing pressure and sampling depths (most representative intervals) can help reduce uncertainty when determining the number of pressure and sample points in the reservoir. Formation mobility, near-wellbore skin damage, reservoir pressure, downhole compositional fluid analysis, and reservoir connectivity were evaluated in a unique and challenging environment. Reservoir connectivity results from formation testing show good alignment with the presence of fractures and other sedimentary features from borehole image data. A similar methodology can be extended to other deepwater turbidite reservoirs in the GOM.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Pressure Transient Data from Wireline Formation Testers : When and How to use it?

Cited by 3 publications

References 9 publications

Assessing Macroscopic Dynamic Permeability Through Pressure and Noise Analysis

Assessing Macroscopic Dynamic Permeability Through Pressure and Noise Analysis

Dynamic Reservoir Characterization from Microbuildups with Formation Tester

Using Wireline Formation-Tester Data for Reservoir Characterization and Connectivity Determination in Ultradeepwater and High-Pressure Wilcox Formation in Gulf of Mexico

Contact Info

Product

Resources

About