... Abstract Five different variants of the acrylamidotertiary-butyl sulfonic acid (ATBS) / N,N-dimethylacrylamide (NNDMA) copolymer were examined and evaluated, comparing their mixability and fluid-loss performance. These were characterized using gel permeation chromatography equipped with multi...

... by leak-off. These fluids should not only provide excellent fluid loss prevention, but also exhibit the rheological characteristics needed to perform the traditional functions of conventional fluids. Even though these fluids reduce the amount of particulates entering the formation by containing less...

.... Further materials Anhydrous CaCl 2 powder was used as a reference accelerator. Furthermore, two commercial fluid loss additives were used to test the compatibility of the accelerators with common oil field additives. The first was a 2-acrylamido-tertiary-butyl sulfonic acid-co-N,N...

... Abstract Fluid loss additives (FLAs) based on 2-acrylamido-2-tert.-butyl sulfonic acid (ATBS) provide fluid loss control by reducing filtercake permeability through polymer adsorption. However, when highly anionic dispersants or retarders are present in the slurry, adsorption of the ATBS...

... Abstract This paper investigates the performance of different kinds of polycarboxylate (PCE) dispersants in combination with cellulose ethers as fluid loss additives and presents their influence on the fluid loss. The objective was to find out whether PCEs can better enhance the fluid loss...

... Abstract Synthetic polymers have long been used as fluid-loss additives (FLAs) in hydraulic cement slurries for cementing subterranean zones. Typically used synthetic polymeric materials include N,N-dimethylacrylamide and sulfonated acrylamide monomers, which are preferred for high temperature...

... Abstract Synthetic polymers are mainly used at HTHP conditions (>400°F), but there is also an application for them at medium temperatures (250 to 350°F) where generally modified natural polymers, synthetic polymers or combinations can be used. These products support fluid loss control...

... Abstract The impact of electrolytes contained in sea water and 20 wt.% NaCl solution on three chemically different fluid loss additives was investigated. As fluid loss additives, a synthetic copolymer of 2-acrylamido-tertiary-butyl sulfonic acid (ATBS) and N, N-dimethyl acrylamide (NNDMA...

... Abstract Oil well cement slurries commonly incorporate several admixtures such as e.g. retarder, dispersant, fluid loss additive, anti-free water agent, defoamer etc. Between them, additive-additive interactions may occur which can result in incompatibilities and reduced performances (the most...

.... Application of the customization process to develop WBMs for other shale plays around the globe is also discussed. shale gas drilling fluid formulation fluid loss drilling fluid chemistry drilling fluids and materials bottomhole temperature water-based drilling fluid spe 140868 drilling fluid...

... be critical to enhancing well productivity. Lab studies support the field trends in regards to cleanup and fluid efficiency. A modified method for evaluating fluid loss tests provides more realistic values for wall building coefficient and spurt that can improve fracture simulator predictions and support...

... silica sand expansion additive slurry permeability operational safety fluid loss control Upstream Oil & Gas manganese tetraoxide cement slurry cl-g cement 45 drilling fluid management & disposal mn 3 fluid loss pressure formation bwoc mn 3 hematite gas migration drilling...

... Abstract Oil well cementing uses a variety of chemically different fluid loss polymers, depending on the specific well conditions. In this study, the working mechanisms of polyvinyl alcohol (PVA), polyethylene imine (PEI) and CaATBS- co -NNDMA cement fluid loss additives were investigated...

... Abstract Water-soluble acrylamide tert-butylsulfonic acid (ATBS)-based copolymers are commonly used to provide fluid loss control for oil well cement slurries. In our study, we investigated the behavior of a CaATBS-NNDMA copolymer synthesized by aqueous radical polymerization with respect...

... fluid-loss control and rheological properties. However, tightening of regulations signals the emergence of restrictions on the use of chrome-based products in water-based fluids. Elsewhere in land operations where currently oil-based fluids are used for high-temperature applications, a move towards HPHT...

... flooding methods drilling fluids and materials Funkhouser viscosity Betaine surfactant drilling fluid selection and formulation drilling fluid formulation fluid loss experiment oscillatory stress sweep society of petroleum engineers steady shear viscosity anionic surfactant gel treatment NaCl...

... prohibitive, where their use is undesirable. In such circumstances, a high-performance water-based drilling fluid is the only option available. A main challenge in developing a water-based fluid for such applications has been to maintain the stability of key fluid properties such as rheology and fluid loss...

... and related field case histories will be presented. casing and cementing fluid loss spe annual technical conference slurry 1 cement chemistry free water Exhibition cement hydration cement formulation transition time fira hydration cement property Upstream Oil & Gas slurry 3 thickening...

... Abstract During completion and workover for the recovery of oil and gas, fluid loss pills are used to control completion brine losses to the formation. Basically, the operator has three types of fluid loss pills to choose. They are linear water soluble polymers like hydroxy ethylcellose (HEC...

... Table 3 Dynamic Fluid-Loss Results Core Synthetic Polymer Fluid CMHPG Fluid C w (ft/min 1/2 ) Spurt (gal/ft 2 ) Spurt Time (min) C w (ft/min 1/2 ) Spurt (gal/ft 2 ) Spurt Time (min) High-perm Berea 0.0086 2.830 32.70 0.0053 2.430 2.4 Low-perm Berea 0.0053 0.060...