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Showing 1 to 15 of 15 for “"drilling mud"”.
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Admicellar Polymerization to Compatibilize Calcium Carbonate With Oil-Based Drilling Mud
… agents like calcium carbonate (CC) are added to drilling mud to improve mud properties and performance during oil and gas drilling operations. Oil-based mud (OBM), a more preferred drilling mud, being hydrophobic is particularly non-compatible with hydrophilic CC. This work explored an …
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An investigation of energy-based planned maintenance of offshore drilling mud pumps.
Mud pumps used on offshore installations for drilling operations have been known to experience unpredictable breakdowns, including during critical stages of drilling. The fluid end has been identified as requiring more maintenance work due to component failure, compared to the power end. The most …
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Wellbore stability in water-sensitive shales
… is a widespread problem, especially when drilling in deep, low strength shale formations at high temperature and pressure. The instability can be caused by the high compressive effective stress or tensile stress due to the stress concentration and pore pressure increase while drilling. In …
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Effects of filtration process variables on filter cake properties and formation
Drilling mud is fundamental during the drilling process because it performs multiple tasks which make the perforation of the rock possible. For this reason, lost circulation, the loss of drilling mud through fractures in the formation, represents a serious issue in the oil and gas industry, since …
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Analytical and Numerical Modeling of Mechanical Cleaning Device (MCD) for High Angle Wells
Drilling subs, having helical grooves or blades on their surface, assist in cuttings bed removal by creating turbulence and bringing the cuttings into suspension for removal by the drilling mud. Several of these subs, primarily meant for highly deviated and horizontal wells, are employed in a …
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Evaluating the Leachability of Elements from Residuals Generated by Hydraulic Fracturing in Marcellus Shale
… Shale region. Four field samples were evaluated: drilling mud, treated sludge from the chemical treatment of process water, solids from the gravity settling of produced water, and sludge solidified prior to disposal in a municipal landfill. Cement kiln dust (CKD), used for solidification, was also …
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Evaluating Leachability of Residual Solids from Hydraulic Fracturing in the Marcellus Shale
… Samples collected for this research were: (1) drilling mud, (2) treated sludge from the chemical treatment of process waters, (3) solids from the gravity settling of produced water, and (4) sludge solidified prior to disposal in a municipal landfill. These samples were subjected to various …
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X-Ray Fluorescence Analysis of Tuscaloosa Marine Shale Cuttings from Horizontally Drilled Wells
… and elemental analysis can help to evaluate drilling accuracy. Geophysical properties from the vertical portions of the wells were used to pick formation tops. The XRF results, including major and trace elements, were used to make chemostratigraphic profiles for the horizontal portions. Based …
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Multi-Scale Nanoindentation For Characterization Of Oil Shales
… Tuscaloosa Marine Shale samples (retrieved from drilling mud). For the Woodford Shale, an average of twenty-five indentations was considered. Likewise, for the Tuscaloosa Marine Shale, eighty indentation tests were completed for each sample depth for an end result of 1,200 indentation tests for …
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Data Driven Approaches to Model Building: Applications to Energy Industries
… categories of casing properties, cement and drilling mud properties, and operating conditions) and manages to correctly classify with confidence 81% of wells as leaking or non-leaking in cross-validation tests. An advanced control system relies on a good control-relevant model that is not …
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Evaluating Leachability of Residual Solids Generated from Unconventional Shale Gas Production Operations in Marcellus Shale
… radioactive material. The water is impounded at drilling sites or treated off-site, resulting in significant generation of residual solids. These are either buried on site or are disposed in lined landfills. The objective of this study was to determine the levels of heavy metals and other …
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Low oil-water ratio invert emulsion mud for unconventional shale reservoirs
… management of the traditional diesel oil-based mud used for drilling difficult formations such as shale, there is the necessity to develop an environmentally friendly drilling mud. Vegetable oils such as Jatropha have proven to be a comparable alternative to diesel oil. However, there have been …
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Development of formation damage models for oilfield polymers.
… (OGI), including: water and gas shutoff; drilling mud viscosity modification; filtration loss control (FLC); swellable packers; loss circulation material (LCM) pills; enhanced oil recovery (EOR); fracture treatment and cleanup; and chemical placement. The deposition and retention of …
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Numerical Evaluation of Various Well Control Methods with Emphasis on Application in Managed Pressure Drilling Operation
Managed Pressure Drilling (MPD) is a modified drilling process designed to accurately manage the annular pressures of the wellbore with a combination of surface back pressure (SBP), flow rate and drilling mud density. MPD is designed to identify and circulate out kicks (uncontrolled flow of …
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Novel Rheometric Techniques and Constitutive Models for Linear and Nonlinear Rheology: Applications to Polymeric Solutions and Colloidal Gels
… we first study ‘rheological aging’ in a drilling mud formulated from a bentonite dispersion (a discotic colloidal gel). We present a framework for modeling the linear viscoelastic response in the presence of physical aging based on the transformation to a ‘material time’ domain. In this …