... Abstract Sand production in oil and gas wells and erosion of pipelines and fittings caused by sand impact is one of the most common and expensive problems for the oil and gas industry. Acoustic sand detectors (ASD) are commonly used to provide a warning/alarm when sand is being produced...

... and shows the impact on the phase behavior calculations. Based on this analysis, qualitative guidelines can be made on what compositional uncertainties have the biggest impact on the different fluid types and phase behavior properties. geology detector gravity geologist geological subdiscipline...

... algorithms utilizing model-based design. While neutron-porosity tools are characterized by nuclear simulation techniques since several decades, gamma-gamma density logging-while drilling tools, typically employing a 137 Cs logging source and two scintillation gamma-ray detectors, are often characterized...

... tool for pipes and multiples casing for metal loss detection. This state-of-the-art technology is a noticeable improvement over existing tools, due to an important increase in the number of sources, number of detectors and wide range of working frequencies. The combination of these changes allows...

... sensitivity vertical resolution SMP fixture detector neutron attenuation response base pipe well logging hydrogen concentration shape memory polymer expansion limestone block Introduction The new shape memory polymer (SMP) sandface completion is now a field proven alternative...

... gas condensate reservoir depletion. Conventional thermal neutron capture cross section (Sigma) has low sensitivity to gas density variations, making it unable to detect reservoir pressure changes. Upstream Oil & Gas log analysis depletion water saturation detector reservoir pressure cc...

.... log analysis Artificial Intelligence machine learning well logging drilling fluids and materials drilling fluid formulation drilling fluid selection and formulation formation testing Upstream Oil & Gas drilling fluid filtrate detector calibration accuracy formation tester sensitivity...

... analysis or a flame ionization detector for a complete assay. Isotope analysis is also possible. Recovery to surface of fluid samples collected at reservoir temperature and pressure allows for analysis with an automated gas chromatograph (GC) deployed in the field, providing reduced labor and rapid...

... to 25,000 psi while minimizing the attenuation of formation gamma rays entering the detector and maintaining good azimuthal sensitivity. The tool uses a robust, constrained, weighted least-squares (WLS) analysis to derive elemental concentrations from measured pulse-height gamma ray spectra. Proprietary...

... Abstract A new cased-hole porosity measurement has been developed for a four-detector pulsed-neutron logging tool. The measurement is based on a capture count rate ratio from two different detectors. To determine an accurate porosity, the ratio is characterized in the laboratory in order...

... measurement. Based on these experiments, an X-ray source and detector were identified and a sensor was designed for inline use on 4 inch pipes. Two approaches were developed to estimate density using the sensor. The first was an empirical approach where sensor gray level values were directly mapped onto mud...

... inconclusive for assessing hydrocarbon potential. Our approach takes advantage of latest-generation PNL tools’ multiple measurements to reduce the uncertainty of water saturation assessment. The proposed methodology was tested with two new-generation PNL tools, which feature high-resolution detectors...

... Abstract The determination of elemental concentrations, mineralogy and lithology is essential for the evaluation of unconventional plays. Several instruments utilizing D-T generator and gamma ray detectors have been developed to determine elemental weight fractions. The measured gamma ray...

..., along with standard 90-ft surveys and single-detector azimuthal gamma ray (GR) tools, have proven to be inadequate. To overcome these issues, a new method has been developed that combines continuous measurements and uses a four-detector azimuthal GR tool. The bottomhole assembly (BHA) used here...

... Abstract Sigma logging is a proven method for determining oil/water saturation behind casing. In this paper, we present a new, diffusion-corrected, sigma algorithm for a four-detector pulsed-neutron logging tool. Since the diffusion effect is inversely related to the distance between source...

... hydraulic fracturing axial extent well logging Completion Installation and Operations Upstream Oil & Gas count rate signal fracture height log analysis proppant detector fracturing fluid modeling nrt signal proppant placement borehole axis fracture plane horizontal well wellbore depth...

... Abstract One important application of a multi-detector pulsed neutron instrument is to detect gas response for determining quantitative gas saturation in the formation. Obtaining this saturation value is achieved by differentiating the gas response from the liquid response. The maximum...

...-detector spacing for maximum accuracy. The tool design comprises a 14 MeV neutron source, two gamma ray detectors and two fast neutron detectors. Counts ratios are used to establish a linear relationship with formation bulk density. This design yields an accuracy of 0.0147 g/cm 3 in shale-free formations...

.... The Mark 1 Sensabot was delivered in 2011 and contained an array of cameras, gas detectors, a vibration detector and a microphone. Trials of this robot were very successful so the development project was continued resulting in a manipulation arm and Sensabot Mark 2. The latter is now proceeding through...

... detector neutron-gamma density measurement formation evaluation Drilling log analysis specification GGD measurement density measurement Reichel limitation NGD society of petroleum engineers Introduction The LWD engineering effort started in the late 1970s, and was initially staffed...