... ABSTRACT Anomaly detection using well integrity logs is crucial for multi-metallic tubular wells, as it helps save operators costly repairs and potential well abandonment. However, features such as collars and artifacts often obscure the signals of outer pipes, making anomaly interpretation...

..., and ultimately improves pipe corrosion evaluation in an efficient and consistent manner. We first design an unsupervised, label-free autoencoder that reconstructs the background while discarding anomalies. In a second step, we combine our unsupervised model with a lightweight supervised learning task targeting...

...SPWLA 60th Annual Logging Symposium, June 15-19, 2019 DOI: 10.30632/T60ALS-2019_YYYY LWD RESISTIVITY ANOMALIES IN OVERBURDEN SECTIONS PROVIDE CRITICAL INFORMATION ON DRILLING SAFETY AND BOREHOLE STABILITY: GULF OF MEXICO CASE STUDIES Michael Rabinovich, John Bergeron, Gerardo Cedillo, Maryam...

.... Anomalous magnetization within the wellbore and formation can influence accelerometer and magnetometer measurements. Detection and proper correction for these magnetic anomalies is important to maintain the integrity of the orientation data and consequently the results derived from the data. Using a fast...

... difficult. This paper analyzes the sources of the problems and explores the proper ways of identifying and minimizing the anomalies which are unrelated to the formation. We encountered three main classes of anomalies in some of the logs. The first kind is from localized casing inhomogeneities...

... papers (Hardman and Shen, 1986), other possible causes (not discussed here) of induction anomalies include washouts or caves on the borehole wall filled with conductive mud, and a highly deviated borehole with the tool crossing a bed boundary. These should also be considered as options in any analysis...

... recorded in AGLP wells, allowing the definitions of its advantages and limitations. log analysis Upstream Oil & Gas anomaly knowledge management expert system log analyst well logging lqc system calibration anomaly Artificial Intelligence lqc form quality control module spwla 36th...

... produce very large dielectric effects. The effects of high dielectric constant on the X-signal logs are distinguishable from magnetic effects, and modeling can be used to estimate the dielectric constant. log analysis x-signal anomaly excursion induction tool Symposium well logging spwla 33rd...

... for several years, and is now operational. well logging true resistivity conductivity Symposium resolution eddy current inversion correction log analysis resistivity Upstream Oil & Gas borehole xhr tool vertical resolution anomaly SPWLA Thirtieth continuous induction log formation...

... ABSTRACT This paper investigates the potential use of a large spacing loop-loop electromagnetic logging tool to detect resistivity anomalies as far as 25 meters away from the borehole wall. A three-dimensional whole space electromagnetic modeling code was used to evaluate the responses...

... experienced significantly different geologic depositional and tectonic conditions. well logging log analysis Upstream Oil & Gas Reservoir Characterization anomaly ezeanyim Gulf Coast shale conductivity Sublette County History correspond boundary cretaceous-tertiary boundary...

... gyroscope reading Probe anomaly information magnetic field log analysis orientation three-component borehole magnetometer probe inclinometer magnetometer Magnitude computer cable Symposium gyroscope azimuth technical associate SPWLA TWENTY-SIXTH ANNUAL LOGGING SYMPOSIUM, JUNE 17-20, 1985...

...-bearing horizon is an extensive graphitic zone. The stratigraphic units are defined by the natural gamma ray spectrometry, IP, SP and magnetic susceptibility methods. The greywacke exhibits high radioactivity, low IP response, low susceptibility and no SP anomalies. The overall radioactivity within...

... and microresistivity anomalies on dipmeter records. Acoustic waveform validity is first verified by evaluating the headwave velocity ratio which must conform to the matrix lithology shown by Lithodensity* and neutron logs. The amplitude spectrum of the compressional headwave is compared to the shear spectrum...

... vicinity log analysis frequency fractured zone well logging wnl waveform character receiver reduction amplitude log amplitude tube wave shear arrival Symposium waveform propagation anomaly borehole normal mode fracture acoustic propagation SPWLA TWENTY-FIRST ANNUAL LOGGING SYMPOSIUM...

... anomaly amplitude core fracture quadrant fracture response sandstone fracture amplitude reduction anomaly borehole fracture interpretation cms log analysis Upstream Oil & Gas Spwla Sixteenth Symposium lithology Shear wave amplitude Altamont Field SPWLA SIXTEENTH ANNUAL LOGGING...

... deflection water factor well logging anomaly borehole Spwla Fourteenth Symposium counting rate correction integration deadtime interpretation SPWLA FOURTEENTH ANNUAL LOGGING SYMPOSIUM, MAY 6-9, 1973 INTERPRETATION OF GAMMA-RAY LOGS BY JAMES K. HALLENBURG ABSTRACT The area under a gamma-ray log...

... ABSTRACT The ULSEL logging technique was designed to detect and map the profile of a salt dome or other large resistive anomaly by using a system of downhole electrodes with interelectrode spacings of the order of hundreds to thousands of feet. The ULSEL tools are made by and the logging...

... deposit well logging anomaly water content boundary bulk density count rate QUANTITATIVE DOGGING AND INTERPRSTATION SYSTNMS To ENALUATEURANIUMDEFQSITS Philip H. Dodd U.S. Atomic Energy Commission Grand Junction, Colorado ABSTRACT The uranium mining industry increasingly relies on analysis...

... production logging anomaly heat flow determination interpretation production monitoring van orstrand heat flow anomaly united states thermal equilibrium Drilling thermal conductivity Reservoir Surveillance temperature measurement gradient equilibrium temperature application thermistor...