... meet performance requirements in a deepwater environment, while enhancing stability in the high temperature wells. Particular emulsifier packages and weight material were utilized to improve long term sag stability, with static aging stretching up to 28 days. Specialized fluid loss reducers were...

... to stabilize emulsions in conventional IEFs, and instead relying upon robust emulsifiers, colloidal solids and shear. Clay-free IEFs are generally built using a “seed” fluid that has been exposed to high shear levels by travelling through the bit. High shear helps form an extremely stable emulsion, allowing...

... to name a few. These challenges can severely limit the desired well depth or increase the operation time, particularly in deepwater environment. A new synthetic-based flat rheology drilling fluid (SBM) with new emulsifier and rheology modifier package has been designed for narrow margin ERD wells...

... values in a wide range of well types. This paper details the design and testing of the clay-free ERD system, including extreme HPHT static aging and sag testing and modifications to the emulsifier package. The economics of implementing the commercial system are also discussed. drilling fluid...

... of weight materials in drilling fluids has always been one of the highest priorities. Sag stability in oil based drilling fluids is an especially complicated process as these systems include an emulsified water phase in a continous oil phase with oil-wetted weight materials suspended in the continuous phase...

... and/or grease content, another version of the SE-SBM is particularly well suited for pretreatment of the cuttings in a bioreactor or other rapid biotreatment technique. drilling fluid selection and formulation drilling fluids and materials growcock toxicity drilling fluid property emulsifier package...

... by which the oil attached to the drill cuttings is physically encapsulated within an insoluble matrix of amorphous silica. The process consists of two stages: Application of an emulsifier, in an acidic environment, to the hydrocarbon- or oil-contaminated drill cuttings. This emulsifies the oil...

... formulation, HPHT hydraulics modelling and best operational practices have played a significant part. This paper discusses the following technical issues, which have contributed to the success of the project: Mud system and formulation Criteria for the optimum level of treatments with emulsifier and oil...

... with increasing temperature, have lower thermal stability and do not dehydrate shales as readily as conventional OBM's. By adjusting the emulsifier package in each mud, these properties may be brought more in line with those of conventional OBM's. synthetic fluid thermal stability emulsifier drilling...

... upstream oil & gas aniline point mineral oil hardness pdm performance elastomer drilling fluids and materials test fluid drilling fluid management & disposal pdm drilling fluid selection and formulation hnbr secondary emulsifier service life compound drilling fluid chemistry...

...) and with increasing temperature of the mud. The ES generally decreases when the mud is undertreated with the emulsifiers. The ES also goes down with insoluble sodium chloride solids or with hematite or ilmenite as alternate weighting agents to barite. Low ES values can also be achieved with large cuttings or lost...

... spe 11391 invert emulsion oil mud geologist deck shaker south texa particle emulsifier tandem double deck shaker geology absorption ft hr well footage solids comparison gravity droplet INTRODUCTION Operators and contractors are constantly searching for methods that will reduce...