[PDF] Application Of Resistivity Tool Response Modeling For Formation Evaluation eBook

Author : Toby Darling
Publisher : Elsevier
Page : 335 pages
File Size : 40,56 MB
Release : 2005-05-26
Category : Science
ISBN : 0080457959

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This hand guide in the Gulf Drilling Guides series offers practical techniques that are valuable to petrophysicists and engineers in their day-to-day jobs. Based on the author’s many years of experience working in oil companies around the world, this guide is a comprehensive collection of techniques and rules of thumb that work.The primary functions of the drilling or petroleum engineer are to ensure that the right operational decisions are made during the course of drilling and testing a well, from data gathering, completion and testing, and thereafter to provide the necessary parameters to enable an accurate static and dynamic model of the reservoir to be constructed. This guide supplies these, and many other, answers to their everyday problems. There are chapters on NMR logging, core analysis, sampling, and interpretation of the data to give the engineer a full picture of the formation. There is no other single guide like this, covering all aspects of well logging and formation evaluation, completely updated with the latest techniques and applications. · A valuable reference dedicated solely to well logging and formation evaluation.· Comprehensive coverage of the latest technologies and practices, including, troubleshooting for stuck pipe, operational decisions, and logging contracts.· Packed with money-saving and time saving strategies for the engineer working in the field.

Author : Hongqi Liu
Publisher : Springer
Page : 361 pages
File Size : 14,30 MB
Release : 2017-06-15
Category : Science
ISBN : 3662549778

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This book primarily focuses on the principles and applications of electric logging, sonic logging, nuclear logging, production logging and NMR logging, especially LWD tools, Sondex production logging tools and other advanced image logging techniques, such as ECLIPS 5700, EXCELL 2000 etc. that have been developed and used in the last two decades. Moreover, it examines the fundamentals of rock mechanics, which contribute to applications concerning the stability of borehole sidewall, safety density window of drilling fluid, fracturing etc. As such, the book offers a valuable resource for a wide range of readers, including students majoring in petrophysics, geophysics, geology and seismology, and engineers working in well logging and exploitation.

Author : Zhihong Qian
Publisher : Springer Science & Business Media
Page : 822 pages
File Size : 30,76 MB
Release : 2012-01-25
Category : Technology & Engineering
ISBN : 3642257895

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CSIE 2011 is an international scientific Congress for distinguished scholars engaged in scientific, engineering and technological research, dedicated to build a platform for exploring and discussing the future of Computer Science and Information Engineering with existing and potential application scenarios. The congress has been held twice, in Los Angeles, USA for the first and in Changchun, China for the second time, each of which attracted a large number of researchers from all over the world. The congress turns out to develop a spirit of cooperation that leads to new friendship for addressing a wide variety of ongoing problems in this vibrant area of technology and fostering more collaboration over the world. The congress, CSIE 2011, received 2483 full paper and abstract submissions from 27 countries and regions over the world. Through a rigorous peer review process, all submissions were refereed based on their quality of content, level of innovation, significance, originality and legibility. 688 papers have been accepted for the international congress proceedings ultimately.

Author : Wilson C. Chin
Publisher : John Wiley & Sons
Page : 320 pages
File Size : 43,92 MB
Release : 2016-12-22
Category : Science
ISBN : 1118926005

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Resistivity logging represents the cornerstone of modern petroleum exploration, providing a quantitative assessment of hydrocarbon bearing potential in newly discovered oilfields. Resistivity is measured using AC coil tools, as well as by focused DC laterolog and micro-pad devices, and later extrapolated, to provide oil saturation estimates related to economic productivity and cash flow. Interpretation and modeling methods, highly lucrative, are shrouded in secrecy by oil service companies – often these models are incorrect and mistakes perpetuate themselves over time. This book develops math modeling methods for layered, anisotropic media, providing algorithms, validations and numerous examples. New electric current tracing tools are also constructed which show how well (or poorly) DC tools probe intended anisotropic formations at different dip angles. The approaches discussed provide readers with new insights into the limitations of conventional tools and methods, and offer practical and rigorous solutions to several classes of problems explored in the book. Traditionally, Archie’s law is used to relate resistivity to water saturation, but only on small core-sample spatial scales. The second half of this book introduces methods to calculate field-wide water saturations using modern Darcy flow approaches, and then, via Archie’s law, develops field-wide resistivity distributions which may vary with time. How large-scale resistivity distributions can be used in more accurate tool interpretation and reservoir characterization is considered at length. The book also develops new methods in “time lapse logging,” where timewise changes to resistivity response (arising from fluid movements) can be used to predict rock and fluid flow properties.

Author : Bishwas Ghimire
Publisher :
Page : 0 pages
File Size : 33,52 MB
Release : 2015
Category :
ISBN :

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Leak-Off-Tests (LOT's) are performed shortly after drilling into the new formation below a cased interval in order to determine the strength of the formation below the cased interval. This helps determine the upper limit of mud weight that can be used safely while drilling the next section, without risking formation breakdown and lost circulation. During LOT, well is shut in, and drilling fluid is pumped into the wellbore by a surface pump. As wellbore pressure increases due to pumping, the entire wellbore system including the formation first responds by expanding. When the wellbore pressure goes beyond a critical value called Leak-Off Pressure (LOP), drilling fluid starts to leak into the formation in the open hole section, first through porous flow and then, through fractures that are induced at the wellbore due to high pressure. This leakage of drilling fluid from the wellbore into the formation along with formation deformation can cause many changes in formation resistivity. Typically, formation resistivity depends on formation water saturation and salinity, and porosity through Archie's equation. Hence, any change in resistivity can be modeled by modeling deformation and invasion during LOT. In this study, a poro-elastic model has been developed to investigate the resistivity change around wellbore during LOT by coupling the effects of deformation and invasion that occur as pressure builds up in the wellbore. Having a model to obtain resistivity around the wellbore during LOT is a prerequisite to predicting the resistivity tool response of a given toll during LOT. By predicting resistivity response during LOT and matching with measured field data, important properties of the formation like permeability and compressibility can be determined. The model developed assumes porous flow around the wellbore to determine the true formation resistivity during initial LOT pressure buildup by coupling the effects of deformation and invasion manifested in the formation in terms of change in formation porosity, water salinity, and water saturation. The results show that the effects of deformation on formation resistivity are relatively small, and while salinity mostly controls formation resistivity in a completely water-saturated zone, water saturation becomes a more important variable in an arbitrarily saturated zone with changing water saturation.

Author : C. Richard Liu
Publisher : Elsevier
Page : 733 pages
File Size : 29,75 MB
Release : 2017-01-31
Category : Science
ISBN : 0128040599

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Theory of Electromagnetic Well Logging provides a much-needed and complete analytical method for electromagnetic well logging technology. The book presents the physics and mathematics behind the effective measurement of rock properties using boreholes, allowing geophysicists, petrophysisists, geologists and engineers to interpret them in a more rigorous way. Starting with the fundamental concepts, the book then moves on to the more classic subject of wireline induction logging, before exploring the subject of LWD logging, concluding with new thoughts on electromagnetic telemetry. Theory of Electromagnetic Well Logging is the only book offering an in-depth discussion of the analytical and numerical techniques needed for expert use of those new logging techniques. Features in-depth analysis of the analytical and numerical techniques needed for expert use of logging techniques Includes software codes, providing a handy tool for understanding logging tool physics and design of new logging tools Provides a detailed glossary of all key terms within the introductory chapter

Author : Philippe P. Theys
Publisher : Editions TECHNIP
Page : 482 pages
File Size : 16,43 MB
Release : 1999
Category : Science
ISBN : 2710807483

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While the first well logs recorded seventy years ago had no provision for data quality control, the development of increasingly sophisticated logging techniques has led to the introduction of a large number of tests to validate acquired data. Log quality can be assured by stringent control of depth, calibrations, signal processing and operating procedures. This work gives a thorough description of these features. The meaningful interpretation of well logs depends on valid input. An understanding of log acquisition, and the performance of rigorous quality checks are the prerequisites for an accurate evaluation of a formation. These elements also enable log users to make decisions based on calculated risks. The book is primarily written for earth science specialists who use log data. It also addresses the needs of logging engineers who seek a better understanding of the log acquisition process. Exercises and their solutions are scattered in the book to complement practical chapters. Contents : I. Premises. 1. Introduction. 2. Evaluation of hydrocarbon volume. 3. Data collection and decision-making. 4. Elements of metrology I: error analysis. 5. Elements of metrology II: volume considerations. 6. Elements of metrology III: other attributes. 7. Mathematical preliminary: propagation of errors. II. Data acquisition. 8. Data acquisition. 9. Sensor and source technology. 10. Effect of measurement duration on precision. 11. Signal processing: filtering. 12. Enhancement of vertical resolution through processing. 13. Tool response. 14. Environmental corrections. 15. The real environment. 16. Density logging. 17. Calibration. 18. Monitoring of tool behavior. 19. Measurement of depth. 20. Directional surveys. III. Data quality control. 21. Data quality plan. 22. Completeness of information. 23. Data management. 24. Log quality checks. 25. Data quality evaluation. 26. Images and nuclear magnetic resonance. 27. Comparison of logged data with other information. 28. Optimum logging and uncertainty management. Bibliography. Index.