Unreliable determination of in situ stress orientation by borehole breakouts in fractured tight reservoirs: A case study of the upper Eocene Hetaoyuan Formation in the Anpeng field, Nanxiang Basin, China

Lianbo Zeng, Xiaomei Tang, Jianwei Jiang, Yongmin Peng, Yongli Yang, and Wenya Lyu

AAPG Bulletin

...Unreliable determination of in situ stress orientation by borehole breakouts in fractured tight reservoirs: A case study of the upper Eocene...

Correction of invasion effects on well logs in Camisea gas reservoirs, Peru, with the construction of static and dynamic multilayer petrophysical models

Ankur Gandhi, Carlos Torres-Verdin, Ben Voss, Federico Seminario Gros, Johnny Gabulle

AAPG Bulletin

... than 1 m [3 ft]), whereby the deep-sensing apparent resistivity log properly resolves the true formation resistivity in the noninvaded (virgin...

Time-lapse electromagnetic with Gramian

Jide Nosakare Ogunbo, Sang-Wook Kim, Arrey F. Enow

International Meeting for Applied Geoscience and Energy (IMAGE)

...) (e) (f) (g) (h) Figure 1: True baseline line resistivity models (Top); true time-lapsed resistivity models (bottom). (a) and (e) Model 1: change...

Optimization of well Placement and Drilling Time by the Use of Azimuthal Measurements in Directional Bottom Hole Assemblies

G. Whiteley, A. Douglas, C. Brown

Indonesian Petroleum Association

... Widuri B-22 Pilot Well B-22 H Widuri B-22 Horizontal TVD True Vertical Depth RAB8 8" Resistivity-At-the-Bit Tool RAB6 6 3/4" Resistivity...

Clay Minerals and Log Analysis

Eric Eslinger, David Pevear

Special Publications of SEPM

... water saturation (= 1-5o [assuming no gas phase]) saturation exponent true resistivity of the rock with its naturally occurring fluids, including any...

ABSTRACT: Application of an MWD Propagation Resistivity and Neutron Tool, by Richard Logan; #91003 (1990).

Search and Discovery.com

Comparison of Electrical Logs and Physical Parameters of Marine Sediment Cores

Frank B. Chmelik, Arnold H. Bouma, Richard Rezak

GCAGS Transactions

... content, with its good match with Resistivity, reflects a general dependency of resistivity on the amount of water. This is true for many other physical...

Interval Resistivities and Very Low Frequency Electromagnetic Induction — An Aid to Detecting Groundwater Contamination in Space and Time: A Case Study

Alvin K. Benson, Melissa A. Stubben

Environmental Geosciences (DEG)

... of the true interval resistivities of the upper surface layers. To estimate the interval resistivities of the subsurface layers, apparent resistivity data...

A Brief History of Wireline Logging

John H. Doveton

Special Publications of SEPM

...-in-law, Henri Doll to attempt the first experimental resistivity survey in a well. I the Pechelbronn oilfield in Alsace, the top of the Hydrobiae marls...

PRODUCTION STATISTICS ON THE GUERNSEY COUNTY AREA

LARRY H. WRIGHT, THE OHIO FUEL GAS COMPANY, COLUMBUS, OHIO

Ohio Geological Society

... at least a Gamma Ray and Density log, while a few have included Neutron, Resistivity, and Accoustical logs to acquire...

Sand Shooting

David Q. Loepp

Wyoming Geological Association

... on the seismic record is to be correlated with some single sharp kick on the well resistivity log. These ideas have been dispelled by experiments...

A Versatile Windows Based Multi-Electrode Acquisition System for DC Electrical Methods Surveys

Douglas D. Werkema, Jr., Estella Atekwana, William Sauck, Johnson Asumadui

Environmental Geosciences (DEG)

... Sauck, Johnson Asumadui 1998 196 206 Vol. 5 (1998) No. 4. Geophysical exploration using electrical resistivity typically employs the use of four...

Joint inversion of magnetotelluric and seismic travel time data with intelligent interpretation of geophysical models

Hongyu Zhou, Rui Guo, Maokun Li, Fan Yang, Shengheng Xu, Zuzhi Hu, Deqiang Tao

International Meeting for Applied Geoscience and Energy (IMAGE)

... are separately inverted resistivity and velocity models together with seismic post-stack data, and the outputs are true resistivity and true velocity models...

Abstract: Utilizing High-Resolution LWD Images to Improve the Well Productivity by Maximizing Reservoir Contact and Optimizing Completion Design in Carbonate Reservoirs; #91204 (2023)

Hussain Al-Najrani, Ahmed Fateh, Hesham Elmasry, Ahmed Taher

Search and Discovery.com

... Formation Evaluation True formation resistivity is essential for reservoir evaluation. In thin reservoirs bounded by layers of different resistivity...

SOUTH LAKE MARACAIBO LOG ANALYSIS

H. D. Brown, J. D. Cunningham, H. A. Salisch

Asociación Venezolana de Geología, Minería y Petróleo (AVGMP)

... grain size increases the resistivity. It is also observed that the higher resistivity readings There is indication in Fig. 4 that larger grain sizes can...

Log and Core NMR T1-T2 and T2-D Mapping of the Bakken Reservoir Complex

Dick Merkel, Michelle Stephans, Cameron Thompson, Kim McLean

Unconventional Resources Technology Conference (URTEC)

... Reservoirs. The NMR-dielectric models in-situ determination of Archie m and n combined with core analysis verified and calibrated our resistivity based...

Inversion of magnetotellurics data with enhanced structural fidelity

Federico Golfré Andreasi, Simone Re, Federico Ceci, Luca Masnaghetti

Petroleum Exploration Society of Australia (PESA)

... workflow making use of the “empirical” constraint. Starting model (a), inverted model after 25 iterations (b) and true resistivity model (c...

Collection and Processing of Digitized Acoustic Log Data

R. A. Broding J. L. Poole

CSPG Bulletin

... is normally determined from the formation factor and the ratio of formation water resistivity to the true resistivity of the rock. Since the formation factor...

Surface-Measured Resistivity May Be Key to Successful Stratigraphic Trap Exploration - A Recent Discovery Using Electromagnetic Imaging

M. Tahsin Tasci, John M. Zordan

West Texas Geological Society

... changes in resistivity with time (depth); mathematical inversion is used to calculate true bulk resistivities for the section (Figure 8). All...

A Methodology Using Triple-Combo Well Logs to Quantify In-Place Hydrocarbon Volumes for Inorganic and Organic Elements in Unconventional Reservoirs, Recognizing Differing Reservoir Wetting Characteristics„An Example from the Niobrara of the Denver-Julesburg Basin, Colorado

Michael Holmes, Antony Holmes, Dominic Holmes

Unconventional Resources Technology Conference (URTEC)

...) 𝑎𝑎 = Archie Factor, often = 1.0 𝑃𝑃ℎ𝑖𝑖 = porosity 𝑚𝑚 = cementation exponent (a rock property) 𝑅𝑅 𝑡𝑡 = true resistivity...

Electric Log Interpretation in Exploring for Stratigraphic Traps in Shaly Sands

Howard A. Slack , Carel Otte

AAPG Bulletin

... the relation between the true resistivity (Rt) of the formation, the fixed-negative charge concentration (mr), and the water saturation (Sw) within...

Using machine learning to predict total organic content … case study: Canning Basin, Western Australia

Russell Menezes

Petroleum Exploration Society of Australia (PESA)

... section of the core. Moreover, these measurements are not a true representation of the formation TOC as the sample selection is affected by sampling...

Reservoir Description: A Synergistic Approach to More Accurate Determination of Oil and Gas Reserves

D G Bowen, T Kennaird, J Hill, E J Frost

Geological Society of Malaysia (GSM)

...Reservoir Description: A Synergistic Approach to More Accurate Determination of Oil and Gas Reserves D G Bowen, T Kennaird, J Hill, E J Frost Geol...

New High-Resolution Oil-Based Mud Borehole Imaging for Improved Interpretation of Deepwater Sediments

Anish Kumar, Robert J. Laronga, George R. Kear, Wesley Cantwell

GCAGS Transactions

... challenged, the new images crisply delineate the laminations and bedding to permit accurate structural dip determination. In the deepwater Gulf...

Scipio NW Field, Part 1: Upper Cromwell and Jefferson sandstone gas reservoirs in T. 8 N., R. 13 E., southwest Mclntosh County, Oklahoma

Richard D. Andrews

Oklahoma City Geological Society

..., the sandstone is tight or pressure depleted-a condition that can usually be identified from porosity and resistivity logs. Figure 1. Generalized...