... compositions at the basis of sodium salts of sulfamic and nitric acids. Moreover, the influence of the ionic composition of the aqueous solution and temperature on the surface properties of the attracted solutions of surfactants (surfactants) was also evaluated. Filtration tests have shown that the use...

... is significantly reduced and the actual oil recovery factor decreases. To solve this problem, chemical technologies for limiting gas inflow have become widespread in the oil industry. Depending on the reservoir characteristics and fluids saturation various types of compositions are used to treat gas...

... This paper describes the selection of surfactant compositions for an unconventional field with low permeability and a high reservoir temperature of 110°С. Screening features are taken into account and special attention is paid to rock surface wettability and phase behavior with oil...

... at stages 3 and 4 is steadily decreasing due to an increase in operating costs and the cost of oil production, due to an increase in water cut. It is possible to optimize and reduce the growth rate of costs by introducing geochemical monitoring technology. Studies of the geochemical composition...

... information about oil and gas reservoirs and the composition of their fluids, which could significantly change the approach to exploration and field development. We present the results of pilot work to determine the inflow profile in a horizontal well based on DNA markers. The technology is based...

... recovery. This study describes an example of miscible gas injection into the reservoir at the Chatylkinskoye field, the infrastructure assumptions which make this option a better one versus a selling option, and the features of a gas treatment and injection process. lng composition methane content...

... and flow lines makes it possible to effectively solve the issues of improving the environmental friendliness and energy efficiency of oil production. The use of composite hydrocarbon solvents is one of the most well-known methods used to remove asphaltene-resin-paraffin deposits. Thus, to date...

... fraction equivalent circuit flow rate composition operation water cut frequency emulsion fluid dynamics water cut meter impedance characteristic flow structure sensor pipeline voltage electrode Introduction Evaluation of the product's water cut using the laboratory method is carried...

..., there is an increase in the working inflow intervals after treatment. The performed field studies confirmed the results of core studies, theoretical studies and physico-chemical surveys. flow divertion composition operation upstream oil & gas efficiency acid fluid dynamics viscosity flow diverter...

... not only with a temporary oil famine, but also with the death of our richest oil regions. This enemy is water, which threatens to flood our wells and turn them from oil to water …" Formation water also has a negative impact on the wellbore condition. Along with the mineral composition of the rocks...

.... A compositional approach was applied to describe fluid state. The studies were carried out on a certified flow simulator with an additional option of gas diffusion. On a 3D reservoir model the losses of hydrogen through the caprocks under conditions of its low permeability were estimated. Similar losses due...

... triassic deposit triassic source rock hydrocarbon middle caspian accumulation basin modeling generation potential correspond territory water area reservoir characterization uplift organic matter deposit composition olenek stage source rock Introduction The Mesozoic history...

... harmful to the environment, were detected in the composition of the obtained gas. The effect of different modifications of iron-containing catalysts on the product yield was investigated in ( Jiang et al., 2018 ). Iron-containing catalysts can promote both the water-gas reaction (1) and the Fischer...

..., elastic properties, as well as Corg content, etc. Within the framework there were performed: lithological and petrographic studies; standard laboratory studies (determination of the mineral composition of rocks – X-ray diffraction analysis; determination of the elemental composition of rocks – X-ray...

... of methanogenic reactions are taken from the available literature. The simulation study covers different scenarios on conceptional field-scale models, studying the impact of well placement, injection rates, and gas compositions. Due to a significant sensitivity of the simulation results to the bio-conversion...

... for heating and remote transportation. The main goal of the study was to create a stable guar-based hydraulic fracturing fluid system with a borate crosslinker, which allows high-quality treatment using high-salinity water. Much attention is paid to the composition of real saline sources, i.e. produced...

... Abstract The computational method for gas-condensate phase permeabilities is presented using digital rock analysis. The proposed method combines: a) construction of high-resolution tomographic images of the pore space; b) development of compositional model of a gas-condensate mixture at pore...

... technologies and their influence on the various types of hydrocarbons of the shale Bazhenov formation: mobile oil in closed pores, sorbed and solid (kerogen) hydrocarbons. Experimental studies were carried out: the selection of the gases composition, the selection of surfactant compositions, the study...

... drilling fluid formulation integrated approach composition drilling fluid property upstream oil & gas coal layer destabilization instability coal interval complication gilsonite unstable interval unstable coal interval efficient drilling petroleum engineer wellbore wall particle...

... dynamics uncertainty analysis gas production calculation composition horizontal well sector model coal pillar petroleum engineer vertical well karaganda basin efficiency gas content fracture Introduction to hydrodynamic modelling of CBM (coal bed methane) From the hydrodynamic modeling...