J.B. Bloys and H.R. Warner Jr.
124 pp.; Softcover
Monograph Vol. 25
ISBN: 978-1-55563-303-5
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The latest addition to SPE’s Monograph Series, Low Invasion Coring will help readers develop an understanding of how to apply the array of technologies required for successful completion of a low-invasion coring (LIC) project. This monograph addresses the principles of obtaining low-invasion cores and provides essential practical tips for engineering field LIC projects. Appendices provide detailed information on specific core-analysis procedures. .




J.B. (Ben) Bloys is the Team Leader for Chevron’s Fluids & Waste Management Technology Group. He also manages several national laboratory and university technology programs. Bloys worked for 17 years at the ARCO Technology Center before joining Chevron in 2000. He holds a BS degree in chemistry from Angelo State University. Bloys has 28 technical publications and 17 patents and is a member of SPE, AADE, ACS, and API.

H.R. (Hal) Warner Jr. has been an independent reservoir engineering consultant since 2000. He previously worked nearly 30 years for ARCO in a variety of technical assignments, with his final assignment as a Senior Technical Advisor. Warner holds a PhD degree in chemical engineering from the University of Wisconsin and a BS degree in chemical engineering from Iowa State University. He is a Distinguished Member of SPE and previously received the 1979 AIME Rossiter W. Raymond Award. He is the author of several technical papers in various SPE publications, and others in The Petrophysicist and for the Gas Processors Association. Warner has been actively involved with SPE’s technical publications, serving as Executive Editor of SPE Reservoir Engineering from 1992-1994, and earlier as a Review Chairman (1989-1992) and Technical Editor (1986-1989). He was a Volume Editor for the second revision of SPE’s Petroleum Engineering Handbook; he also was the author or coauthor of three chapters in its Reservoir Engineering and Petrophysics volume. Currently, he serves on SPE’s JPT Special Series Committee.

Table of Contents 


1.  Overview
2.  Preplanning
3.  Low-Invasion Coring Bit Selection
4.  Other Downhole Hardware
5.  Low-Invasion Coring Fluids
6.  Rigsite Operations
7.  Coring Poorly Consolidated Sandstone
8.  Core Analysis

Appendix A-Selected SPE Papers Concerning LIC Technologies
Appendix B-Special Circumstances-Sponge Coring and the Use of Noninvading Core Gel
Appendix C-Calculation of Filtrate Saturation
Appendix D-Calcium Carbonate Determination in Whole Mud
Appendix E-Iodide Ion Analysis
Appendix F-Bromonaphthalene-Analysis Procedure
Appendix G-Sample Anaerobic-Crude-Oil Collection Letter
Appendix H-Chloride Ion Analysis-Brine Saturation
Appendix I-Impact of Oil-Based Mud on Connate Water Saturation and Other Rock Properties
Appendix J-Deuterium Oxide Tracer Calculations