Download - PETROPHYSICS - spwla.org · PETROPHYSICS August 2015, Vol. 56, No. 4 Contents The Society of Petrophysicists and Well Log Analysts is dedicated to the advancement of the science of

August 2015 PETROPHYSICS

PETROPHYSICSAugust 2015, Vol. 56, No. 4

Contents

The Society of Petrophysicists and Well Log Analysts is dedicated to the advancement of the science of forma on evalua on through well logging and other forma on evalua on techniques. SPWLA is dedicated to the applica on of these techniques, to the explora on and exploita on of gas, oil and other minerals. PETROPHYSICS publishes original contribu ons on theore cal and applied aspects of forma on evalua on; par cularly well logging and petrophysics.

EditorOliver C. MullinsSchlumberger Doll [email protected]

Managing EditorStephen [email protected]

Publica on ManagerAnna TarltonInkSpot Prin ng2301 S. ShaverPasadena, TX 77502, USA+1-713-472-1100orders@inkspotprin ng.com

The Society of Petrophysicists andWell Log Analysts

8866 Gulf Freeway, Suite 320Houston, TX 77017, USA

P: +1-713-947-8727F: +1-713-947-7181

Email: [email protected]@spwla.org

www.SPWLA.org

ISSN: 1529-9074

300 From the President300 Calendar of Events306 From the Editor307 Call for Abstracts: 57th SPWLA Annual Logging Symposium, Reykjavik, Iceland309 SPWLA Fall Topical Conference

REPRINT310 The Abstract

Stephen Prensky

ARTICLES313 Subsurface Fluid Characteriza on Using Downhole and Core NMR T1-T2

Maps Combined with Pore-Scale Imaging TechniquesMargaret Lessenger, Dick Merkel, Rojelio Medina, Sandeep Ramakrishna, Songhua Chen, Ron Balliet, Harry Xie, Pradeep Bha ad, Anna Carnerup, and

Mark Knackstedt

334 In-Situ Evalua on of Vapor Proper es Using Condensed Vapor GammaTerence P. O’Sullivan

346 Gas Diff usion into Oil, Reservoir Baffl ing and Tar Mats Analyzed by Downhole Fluid Analysis, Pressure Transients, Core Extracts and DSTsVladislav Achourov, Thomas Pfeiff er, Terje Kollien, Soraya S. Betancourt, Julian Y. Zuo, Rolando di Primio, and Oliver C. Mullins

358 Petrophysical Interpreta on of LWD, Neutron-Induced Gamma-Ray Spectroscopy Measurements: An Inversion-Based ApproachOyinkansola Ajayi, Carlos Torres-Verdín, and William E. Preeg

TECHNICAL NOTE379 The Bateman-Konen Resis vity-Salinity Transform II David Kennedy

ABSTRACTS382 2015 SCA Interna onal Symposium, St. John's, Newfoundland and Labrador, Canada

IN THE SOCIETY399 Chapter News403 Erratum404 New MembersAbout the Cover

From the paper by Lessenger et al., SEM images of mineral surfaces showing the pres-ence and absence of asphaltene deposits. Minerals imaged include quartz (upper le ), carbonate (upper right), chlorite (lower le ), and admixed chlorite and illite (lower right). These 'bumpy' asphaltene fi lms can be seen as aggregated asphaltene deposits on other-wise smooth mineral surfaces. The presence of asphaltene fi lms on mineral surfaces fl ip their we ability from water-wet to oil-wet. The imaged pores are mixed-wet at the macro- and micropore scales.