... and machine learning methodologies are developed, which rely on the combination of XRF and FTIR spectra. This approach allows quantification of the concentration of minerals, mineral groups and chemical elements with remarkable accuracy, not achievable by using XRF or FTIR data alone. The two analytical...

..., it is not designed to determine model parameters only from the measurements that are normally available during drilling, nor does it focus on the appropriateness of the model being easily adaptable to different concentrations of particles (bentonite). Ye et al. (2015) have shown that there is a relationship...

... a review of current treatment solutions and a novel experimental methodology for testing the effectiveness of materials injected into a full-scale diameter test section with a debonded inner casing. A test cell was constructed consisting of two concentric sections of 9 5/8-in and 7-in casings, respectively...

... concentration temperature water-based reservoir drilling fluid depletion Introduction As the drilling environments become more challenging, the performance of drilling and completion fluids becomes even more critical for achieving key operational objectives to minimize well construction cost while...

... is critically dependent on their performance under brine exposure typical of downhole conditions. This study investigates the hydro-mechanical behavior of a granite-based GP system subjected to brines of different MgCl 2 concentrations (0-15 wt.%). The use of MgCl 2 brines as opposed to the more commonly...

... standalone and premium mesh screen as the lower completion strategy. In response to these challenges, an HT WB RDF system using a novel synthetic polymer was customized with optimal chemical concentrations and sized calcium carbonates to bridge reservoir pores while building a high-quality acid-soluble...

... concentrations. By varying those conditions, the study measured the resulting torque and used these data to accurately determine the friction coefficient. An LSTM machine learning model was also utilized to predict and detect downhole anomalies in real-time, providing a surface-torque based data-driven tool able...

... of non-productive time. annular pressure drilling drilling fluid management & disposal talcm geologist rock type circulation formulation well control geology drilling fluids and materials sandstone plug viscosity talcm formulation concentration borehole thermally activated...

... Abstract Foaming a cement slurry is known to reduce the fluid loss compared to that of the unfoamed base slurry ( McElfresh, P. M. and Boncan, G, 1982 ). This study looks to quantify the effect other parameters such as fluid loss additive concentration, fluid loss additive type (ie: film former...

... engineering upstream oil & gas directional drilling wellbore integrity weakness strength mechanism observed borehole instability tabular skadsem concentration Introduction The Ekofisk field in the Norwegian sector of the North Sea was the first producing field in Norway, with production...

..., the hydrocyclone, and the centrifuge. This was achieved at hollow glass beads concentrations of around 11% and 22% by volume. While some previous field experiences had indicated severe challenges with centrifuge usage with these fluids, effective centrifuge operation could be demonstrated once the proper settings...

... without application of damaging weighting solids. The drilling fluid contributed to successful MPD and delivered wells with very good hole quality in the reservoir, which consisted of interbedded sandstone, coal stringers and shale. The shale stabilising properties of concentrated formate brine–based...

... concentration tracer concentration coring operation asia government norway government invasion saturation fluid invasion tracking wbm intelligent tracer illustration tracer test analysis chemical tracer application objective petroleum engineer plug Introduction Tracer Selection...

... draupne 4 ddt gudrun completion wb particle liner strength particle bhp background ga concentration depletion overbalance wellbore fracture Gudrun Field Gudrun is a turbiditic sandstone reservoir complex characterized by low Net-To-Gross (NTG) formations filled with gas, condensate...

.... At such low densities, the HGB concentrations become very high (>40% by volume, see Fig. 5 ) and it was important to do additional testing as the manufacturer only specifies survival at a given reference concentration in a reference fluid. As concentration is increased beyond the reference value...

... set of important conclusions are concerned the cementing slurry design and centralizer selection and placement: salt concentration in cement slurry, bond strength between salt formation and cement slurry stands as the key characteristic and the salt-based cement slurry with this property provided...

... of shale inhibitors which can span multiple types of chemistries. The maintenance of these additives is nuanced due to their inherent depletion on reactive minerals leading to uncertainty of active concentration of these additives during a drilling campaign. Considering the critical need to maintain...

... selection and formulation drilling fluids and materials wellbore design wellbore stability mud formulation calculation failure criterion mud weight hypothetical scenario ecd value geomechanics model upstream oil & gas concentration operational scenario drilling window reservoir...

... evaluation drilling fluid chemistry drilling fluid selection and formulation cement formulation fluid loss control casing and cementing drilling fluids and materials drilling fluid formulation attenuation concentration drilling fluid property cement chemistry upstream oil & gas weak zone...

... control. The use of advanced machine learning methods would be a robust way to capture and model such complexities (e.g., Gul et al. 2020c ). A sufficiently large dataset of component concentrations and fluid properties for a given type of drilling fluid will be needed in that case for training purposes...