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The highest concentration of Ba was in drilling mud, additives to heavy water-based mud, and barite. The main use of barite is in heavy water-based mud, which is used for drilling marl, limestone, and shale formations. Therefore, Ba concentrations are high in the waste of these formations. ... Barite and heavy mud samples indicated a greater ...
Barite–seawater and barite–porewater distribution coefficients (Kd) were calculated for determining the predicted environmental concentration (PEC; the bioavailable fraction) of metals from drilling mud barite in the water column and sediments, respectively. ABSTRACT EDITOR'S NOTE: This is 1 of 5 papers reporting on the results of a 4-year project to develop …
C. Prevention of blowouts: During a high-pressure drilling operation, a blowout was averted due to the quick response of drilling personnel in adjusting the clay concentration in the drilling mud. The increased viscosity provided by the clay helped control the wellbore pressure and prevent a potentially disastrous blowout.
Barite dosages of 250, 350, and 450 grams resulted in drilling mud density equal to 13.9, 15.6, and 17.5 ppg, respectively. Another important property is the drilling fluid pH, and it …
The consistency index (K) increases as the barite concentration is increased, which indicated that the fluid becomes more viscous when barite concentration is increased. Therefore, results …
Bentonite continues to rank second in quantity only to barite as a mud additive, as shown in Fig. 11-2.14 In spite of the partial replacement of bentonite by polymers in some muds, about 1,160,000 short tons (1,050,000 …
Weighting agents are mixed with the drilling mud to provide the high density required to control high-pressure high-temperature (HPHT) wells throughout the drilling operation. Solids sag occurs when the weighting agent separates from the liquid phase and settles down, causing variations in the drilling fluid density. This study evaluates barite–manganese tetroxide …
Barite-seawater and barite-porewater distribution coefficients (Kd) were calculated for determining the predicted environmental concentration (PEC; the bioavailable fraction) of metals from ...
Therefore, viscosity plays an important role in the formulation of drilling mud, and the optimum concentration of barite in drilling mud was chosen according to the plastic viscosity and …
the impact of the mud density of barite and calcium carbonate as weighting materials on hole cleaning and transport efficiency. 19 They varied the concentration of each weighting
This study delves into the intricate world of drilling mud preparation and analysis, particularly focusing on the effects of various parameters on the properties of water-based muds.
Normally, we accomplish salt contamination and elimination of the development of large cavities in the salt formation by saturating water-based mud with salt. Dispersed Drilling Mud. A dispersed water-based drilling mud usually uses drilling chemicals that cause the clay platelets to "disperse," or separate, within the liquid phase (Fig.2).
Five metals, other than barium, are present in a typical North Sea drilling mud barite at concentrations higher than the North Sea sediment background concentrations reported by Bjørgesæter (2006) (Table 1). These …
The yield point at 0% barite concentration gave the least yield point; this signifies that the barite concentration aids in the carrying capacity of the drilling mud. It was also observed that the barite concentration can be used to make the fluid more pseudo-plastic in nature.
Barium concentration (i.e., from drilling mud barite) often exceeds 10000 lg/g in sediments on the sea floor near offshore drilling discharges (Ray and Neff 2003).
The yield point at 0% barite concentration gave the least yield point; this signifies that the barite concentration aids in the carrying capacity of the drilling mud. It was also observed that the barite concentration can be used to make the fluid more pseudo-plastic in nature.
Fig. 3-Schematic illustration of mud viscosity Increase from the depletion of PHPA during drilling. History of PHPA Muds. The previously noted investigators discussed the following important design features of PHPA muds: (1) maintaining 0.5 to 1.0 lbm/bbl [1.4 to 2.9 kg/m3] PHPA in the mud, (2) keeping colloidal-solids content as low as possible with good solids …
Because reservoir pressure usually increases with well depth, the concentration of barite in the drilling mud is increased as the well is drilled deeper (Neff et al. 1987). Barite is a soft, dense (4.1–4.5 g/cm3) natural mineral. Drilling mud barite is at least 92% pure (USEPA 1985), has a specific gravity greater than 4.2 g/cm3, and 97 ...
The consistency index (K) increases as the barite concentration is increased, which indicated that the fluid becomes more viscous when barite concentration is increased. Therefore, results have showed that concentration of barite affect the density …
Barite-seawater and barite-porewater distribution coefficients (Kd) were calculated for determining the predicted environmental concentration (PEC; the bioavailable fraction) of metals from drilling mud barite in the water column and sediments, respectively.
Barite-seawater and barite-porewater distribution coefficients (Kd) were calculated for determining the predicted environmental concentration (PEC; the bioavailable fraction) of metals from drilling mud barite in the water column and sediments, respectively. Values for Kd barite-seawater and Kd barite-porewater were calculated for barium ...
In order to counterbalance the formation pressure, the drilling mud is weighted up using a chemical additive, usually Barite. The usability of locally sourced Nigerian Barites on the major types ...
This research presents a study of the effect of drilling fluid on the reservoir rock properties. The interactions between the clay minerals existing in the formations and the drilling fluids have been studied. Two types of drilling fluids, which are water-based ferrochrome lignosulfonate base mud and lime mud, were prepared for the study. About 100 core plugs …
the concentration of barite in the drilling mud is increased as the well is drilled deeper (Neff et al. 1987). Barite is a soft, dense (4.1–4.5 g/cm3) natural mineral.
The yield point at 0% barite concentration gave the least yield point; this signifies that the barite concentration aids in the carrying capacity of the drilling mud. It was also observed that the barite concentration can be used to make the fluid …
Barite production is from the USGS Mineral Commodity Summary. The oil and gas industry is the primary user of barite worldwide. There it is used as a weighting agent in drilling mud.
To prepare brine in drilling mud, you can follow these steps: Gather the required materials: You will need water, salt, and a mixing vessel or tank. Calculate the desired concentration: Determine the concentration (salinity) of brine required for your specific drilling mud. This can vary depending on the drilling operation and geological ...
the concentration of barite in the drilling mud is increased as the well is drilled deeper (Neff et al. 1987). Barite is a soft, dense (4.1–4.5 g/cm3) natural mineral. Drilling mud barite is at least 92% pure (USEPA 1985), has a specific gravity greater than 4.2 g/cm3, and 97 weight % must pass through a 75-lm screen, with no more than 30% ...
This behavior indicates a decrease of the plastic viscosity sensitivity with an oil fraction disturbance, in a drilling mud with an excess of barite concentration (or with an increase of mud weight). However, Fig. 4 (A) and (B) also indicate a downward trend of the emulsifier concentration sensitivity with the mud weight increase.
Barite (barium sulfate, BaSO4) contains 58.8 % barium and has a specific gravity of (4.2–4.5). The barite used in drilling fluid, which is normally impure, is of lower specific gravity as it contains other minerals such as quartz, chert, calcite, anhydrite, celestite, and various silicates. Also, it …
