Study on Attapulgite as Drilling Fluid Clay Additive in Persian Gulf Seawater

doi:10.5829/ije.2022.35.03c.12

Cited by 6 publications

(8 citation statements)

References 28 publications

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“…Creating drilling fluids for drilling through a pay zone requires a deep understanding of the reservoir [8,9]. Damage mechanisms of the productive formation during drilling include fine-solids migration, clay swelling, incompatibility of the drilling mud with formation fluid, and the use of formation-damaging reagents that can reduce average formation permeability, resulting in lower flow rates [10][11][12]. Barite cannot be dissolved in acid and this characteristic leads to a decline in reservoir properties when it is filtered into the pay zone [13].…”

Section: Introductionmentioning

confidence: 99%

“…Potassium chloride is added to drilling fluids to stabilize water-sensitive clays through the inhibition created by potassium ions. Due to the inhibiting abilities of solutions that contain potassium chloride, clay hydration is reduced to a minimum, leading to a reduction in cavernosity, less sealing of the bit and stabilizer, less clay caving, and the preservation of reservoir properties [12,32,33]. Potassium chloride salt is used as the main source of potassium ions in the muds.…”

Section: Introductionmentioning

confidence: 99%

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Barite-Free Muds for Drilling-in the Formations with Abnormally High Pressure

Leusheva

Alikhanov

Morenov

2022

Fluids

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This paper discusses problems associated with water-based drilling fluids used for drilling formations with abnormally high pressure. The available solutions are suitable for a narrow range of applications, especially when weighted muds should be used. This paper reviews the experience of searching and developing a new type of drilling mud based on saturated brines. With the referenced papers as the basis, the authors developed compositions of such brine-based drilling muds. A distinctive feature of the considered compositions is the absence of barite, which is often used as a weighting agent. The paper presents a methodology for creating and investigating the proposed drilling fluids. The rheological properties and thermal stability of the muds at various temperatures were studied. The results show that proposed drilling fluids can be efficiently used for drilling formations with abnormally high pressure. It is assumed that the developed muds have greater versatility than analogues.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Barite-Free Muds for Drilling-in the Formations with Abnormally High Pressure

Leusheva

Alikhanov

Morenov

2022

Fluids

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confidence: 99%

“…After modeling and building the "Hydraulic thrusting device-Downhole motor-Bit" system, the results were validated by setting up a computational experiment in the AnSYS Workbench program using a direct numerical simulation of the process of the system functioning by the finite element method with a grid frequency of 12,642,971 elements and a tetrahedron type. (Figure 15) [40,41]. According to the simulation results, it can be noted that along the length of the hydraulic thrusting device, the velocity changes by approximately two times (for example, at a flow rate of 26 L/s, the velocity in the upper part of the hydraulic thrusting device is 1715 m/s, and in the lower part-3122 m/s): the drilling mud has the minimum velocity at the top of the device and the maximum velocity at the bottom.…”

mentioning

confidence: 99%

“…The operation of the device will also have a significant impact on the complex distribution of the flow in the internal cavity of the hydraulic thrusting device due to its complex geometric shape.After modeling and building the "Hydraulic thrusting device-Downhole motor-Bit" system, the results were validated by setting up a computational experiment in the AnSYS Workbench program using a direct numerical simulation of the process of the system functioning by the finite element method with a grid frequency of 12,642,971 elements and a tetrahedron type. (Figure15)[40,41].…”

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confidence: 99%

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Numerical Simulation of Nonlinear Processes in the “Thruster—Downhole Motor—Bit” System While Extended Reach Well Drilling

et al. 2023

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The relevance of the application of hydraulic thruster technology is determined by the technological limitations of drilling both vertical and horizontal wells. The existing experimental studies confirm the effectiveness of the technology, but its widespread implementation is hindered by the lack of scientific foundations for its operation in combination with a downhole motor and bit. Our research methodology includes methods for analyzing scientific and technical information as well as methods of numerical modeling using programming languages and ready-made software packages for CFD calculations. Verification of the simulation results was carried out on the basis of the experimental field studies previously conducted with the participation of the authors of the article. This article presents the results of the analysis of the current state of the problem and computer physical and mathematical modeling of the work of the thruster together with the bit and downhole motor when drilling a deviated section of a well. Based on the simulation results, the expediency of using hydraulic thrusters in the practice of drilling wells with the possibility of predicting and operatively regulating the operation parameters of the “Hydraulic Thrusting Device—Downhole Motor—Bit” system is theoretically substantiated and scientifically confirmed.

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A Review on Glycerol-Based Drilling Fluids and Glycerine as a Drilling Fluid Additive

Momeni,

Moradi,

Tabatabaei-Nejad

2024

MGPB

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A significant increase of energy demands all over the world and production decline from available oil and gas reservoirs have led the industry to invest in major offshore petroleum resources. However, drilling operations in offshore environments are usually restricted by environmental constraints. Therefore, recent studies are devoted to the development of environmentally compatible fluids with adequate technical properties. Glycerine is a non-toxic, lubricating, colorless, odorless substance with a higher density than water. Due to the properties of glycerine, it can be used as the base of drilling fluid to formulate synthetic-based fluids. This research aimed to review the studies on the applications of glycerine in the composition of drilling fluid. Based on the results, glycerine-based fluids can be considered as an environmentally compatible fluid with sufficient technical properties to replace other drilling fluids. However, there is a lack of experimental studies on the glycerine fluid properties for a reliable decision. For the application of glycerine fluids, an economic feasibility study is mandatory for both pure and crude glycerine. Also, the thermal stability of glycerine fluids is an important aspect, which should be covered in future research studies.

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Study on Attapulgite as Drilling Fluid Clay Additive in Persian Gulf Seawater

Cited by 6 publications

References 28 publications

Barite-Free Muds for Drilling-in the Formations with Abnormally High Pressure

Barite-Free Muds for Drilling-in the Formations with Abnormally High Pressure

Numerical Simulation of Nonlinear Processes in the “Thruster—Downhole Motor—Bit” System While Extended Reach Well Drilling

A Review on Glycerol-Based Drilling Fluids and Glycerine as a Drilling Fluid Additive

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