... Abstract Common stuck pipe caused by borehole uncleaning and wellbore geometry are a major threat to oil and gas drilling engineering, resulting in significant time and economic costs. These are highly correlated with the dynamic friction of the drill string. Drillstring friction...

... and used to calculate the electromagnetic (EM) fields in a cylindrical borehole and homogenous isotropic formation. The EM propagation is governed by a set of antennas including a transmitter and two receivers geometrically modeled as in current LWD tools. During the sensitivity analysis, different...

...Governing equations In this section, we present the equations for modeling anisotropic stresses around borehole using LA solution followed by implementation details of an iterative algorithm to determine upper and lower failure limits of wellbore pressure. Lehnitskii-Amadei Solution...

... Abstract Open hole wireline logging, due to its lower overpull capacity relative to logging-while-drilling, is subject to increased stuck tool risk and can lead to costly fishing operations, lost-in-hole charges, and the need to sidetrack the borehole. The risk increases in higher overbalance...

... effectiveness. upstream oil & gas casing design floatation sub directional drilling rotation drilling operation setting casing casing and cementing centralizer efficiency prediction rotate borehole torque application floatation sub placement operator configuration scenario friction...

... is considered to be multi-hole wells the construction of which allows oil companies to improve the Capex to cumulative production ratio. At the pre-FEED stage the project, geological, hydrodynamic and geomechanical models of the reservoir were built, the most efficient borehole parameters and trajectories were...

... reservoirs. reservoir characterization artificial intelligence neural network reservoir geomechanics hydraulic fracturing wellbore design fracturing materials proppant fracturing fluid abdulraheem input parameter breakdown pressure ann model borehole borehole diameter machine learning...

... issues became apparent during the course of drilling the well, the main factor being consistently poor borehole condition. An added factor potentially exacerbating the progressively worsening borehole conditions was attributed to the significant tectonic activity in the area. To address and identify...

... spectroscopy logging, full waveform acoustic data and borehole image along conventional logs. Natural fracture systems can have a significant effect on the fluid flow within the reservoir as they create permeability and/or porosity trends resulting in overall reservoir anisotropy. Hence it is important...

... Abstract In response to the borehole instability problems such as wellbore collapse and sand production, which often occur in drilling and completion, a thermosensitive screen technology that can expand spontaneously at a specific temperature has been developed. The radial expansion...

... to within 5 ft of the physical edge of the EAP-filled fracture anomaly. We are currently using results from our ongoing geophysical surveys to refine and verify the efficiency of forward and inverse EM modeling codes for open-borehole and through steel casing scenarios. This paper describes the ground-truth...

... with stratigraphic features in the field. This first-of-its-kind, real-time feature is output at a high sampling rate for the full azimuth of the borehole and should be a useful aid in geosteering applications where the goal is to maintain the borehole within a target formation or to follow a known stratigraphic...

... porous oil bearing mudstones. However, no in depth advanced interpretation was conducted at the time. Recently, advanced analysis including high resolution log enhancement, NMR 2D porosity and saturation analysis, acoustic azimuthal anisotropy, near wellbore imaging, fracture interpretation, and borehole...

... might pay a vital role in understanding the extent and composition of water-ice on the Moon, leading to efficient colonization of the solar system. Artificial Intelligence drilling fluid management & disposal Upstream Oil & Gas strength borehole machine learning water content lunar...

... & Gas Highland composition lunar surface US government constraint particle diameter drilling operation Cambridge University Press borehole mineralogy Drilling activity regolith Artificial Intelligence wireline drilling landing site target depth Crawford Drilling lander exploration...

... such as different borehole sizes and drilling mud types, are simulated. The reasons for the change of the standard spectra shape are analyzed. A model based on gamma ray attenuation is introduced to compensate for the effects of logging conditions on the changes of standard spectra. The simulation results show...

... of the acquisition electronics. The standard environmental corrections for NGR tools correct for borehole effects (mud weight and composition, borehole size, and tool position in the borehole), so that the tool response to a given formation is independent of the borehole environment. In this paper, we present...

... of a dual-exponential fit to cleanly separate the borehole decay from the formation decay. We will show that this approach works well, and can provide a certain advantage relative to the "moments method". Upstream Oil & Gas apparent formation sigma borehole environment neutron log analysis...

... if the tool is run in a 4.89-in. borehole filled with fresh water. Although all gamma-ray tools are supposed to provide the same results for such a well, in the real world there is no single one-size-fits-all concept. The measurements provided by tools characterized with the University of Houston (UH) GR pit...

... of locating magnetic cement slurry that is placed behind a stainless steel casing. An electromagnetic coil was used to generate a magnetic field inside the borehole. It was found that when a current was passed through the electric coils, magnetic field lines passed through the stainless steel casing...