Mud engineer

Abstract: This chapter is a general introduction to the composition, functions, properties, and systems used to drill oil and gas wells. A description of the various levels of expertise, as defined by the API for a drilling fluid specialist are covered. The reasons for using a drilling fluid are given in the functions section, the two main properties to satisfy the functions being density to control pressures and viscosity for hole cleaning and suspension. The composition of drilling fluids is related to the base fluid used to formulate the fluid—water, nonaqueous, or pneumatic. The properties of the fluid, as tested by the drilling fluid specialist, are described. The properties tested are classified as controlling the mud weight, viscosity, fluid loss, and chemical reactivity. The selection of a drilling fluid is related to commonly used drilling fluids systems. A brief description of common solids control equipment is included.

Abstract: This chapter is a general introduction to the composition, functions, properties, and systems used to drill oil and gas wells. A description of the various levels of expertise, as defined by the API for a drilling fluid specialist are covered. The reasons for using a drilling fluid are given in the functions section, the two main properties to satisfy the functions being density to control pressures and viscosity for hole cleaning and suspension. The composition of drilling fluids is related to the base fluid used to formulate the fluid—water, nonaqueous, or pneumatic. The properties of the fluid, as tested by the drilling fluid specialist, are described. The properties tested are classified as controlling the mud weight, viscosity, fluid loss, and chemical reactivity. The selection of a drilling fluid is related to commonly used drilling fluids systems. A brief description of common solids control equipment is included.

Abstract: The proper selection of drilling fluids formulations and its treatment has always been a challenge and requires a great effort to ensure optimum drilling performance. The objective of this paper is to assist the mud engineer in selecting the water-based drilling fluid formulations that are best suited for a certain application. To achieve this target, the field practices were combined with the literature to study the most practiced water-based drilling fluid recipes used for onshore gas applications in the Middle East (i.e., spud mud, high-bentonite spud mud, salt/polymer mud, and high-overbalanced mud). From both field practices and deep literature review, it is recommended that both spud mud and high-bentonite spud mud be prepared and pre-hydrated for 4–6 h before a well spud. Also, it is important to add detergents with high-viscosity sweeps to avoid the bit balling and maintain the gel strength. While for salt/polymer mud, the regular addition of sodium sulfite is necessary for polymers stabilization, and the efficient solids control equipment performance is essential. To avoid the solids sagging issues associated with drilling high-pressure high-temperature deep gas reservoirs, it is recommended to either uses sag resistance materials, micronized weighting materials, or a combination of different weighting materials. The high-overbalanced mud is the most effective and efficient type when drilling a combination of natural fractured depleted gas reservoirs with high-pressure gas reservoirs.

Abstract: The invention provides a system for real time mud monitoring. The system is distinctive in that it comprises means for real time continuous or frequent measurement of a diversity of mud parameters of the mud being pumped into the well, said parameters at least comprising mud weight/density and viscosity, a skid where the means for measurements are arranged, said means are connected in real time to a mud process for measurements and to a data collection and analysis system connected in real time and interfaced to a mud engineer. Related method and use.