Modeling the acid treatment of a polymictic reservoir

Acid treatment of wells program is directly related to oil production efficiency. Investigations aimed at improving the efficiency of acid treatment in a terrigenous reservoir have mainly reviewed the changing and adapting the reagents to minimize bridging caused by acid-rock interaction. Under real conditions, application of new and unique acid compositions is a complex process from an organizational point of view and is therefore not widely used as compared with conventional compositions based on a mixture of hydrochloric and hydrofluoric acids. The paper is based on an approach to improve acid treatment efficiency through optimal design based on near-bottomhole zone treatment simulation. The aspects for practical application of the developed acid treatment simulator for terrigenous reservoirs based on a numerical model of hydrodynamic, physical and chemical processes in a porous medium on an unstructured PEBI-grid are described. The basic uncertainties of the model are identified and analyzed. Influence of empirical parameters within the system of equations on the calculation results and modeling of the mineralogical composition of rocks are considered. Algorithm for static modelling of near-bottomhole zone for acid treatment modelling is described, as well as an approach to optimizing the design of near-bottomhole zone treatment based on adapting the results of rock tests in the model. Using experimental data, the necessity of accounting for influence of secondary and tertiary reactions on the results of modeling physical and chemical processes during acid treatment of terrigenous reservoirs was proved. The distinctive features of West Siberian objects (polymictic reservoirs) with respect to the efficiency of near-bottomhole zone treatment with clay acid have been investigated. Series of calculations to determine the optimum volume of acid injection has been carried out. Experience of previously conducted measures under the considered conditions has been analyzed and recommendations to improve the efficiency of acid treatment have been given.

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Rheological Behavior and Mix Design for 3D Printable Cement Paste

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.799.282 ◽

2019 ◽

Vol 799 ◽

pp. 282-287 ◽

Cited By ~ 2

Author(s):

Galina Stanislavovna Slavcheva ◽

Olga Vladimirovna Artamonova

Keyword(s):

3D Printing ◽

Cement Paste ◽

Rheological Behavior ◽

Ionic Composition ◽

Rheological Behaviour ◽

Mineralogical Composition ◽

Point Of View ◽

Mix Design ◽

Scientific Concept ◽

Physical And Chemical

This paper presents the theoretical analysis and experimental results concerning the rheological behavior and mix design of a 3d printable cement paste as matrix for printing concrete. From the point of view of classical rheology of disperse systems, the application of 3D printing technology in construction has been analyzed. The general scientific concept for optimization of admixtures for 3D printable materials has been developed in terms of viscosity, consistency, and parameters of flocculation and structural built-up. The technological tools to control rheological behavior of visco-plastic admixtures are identified in all stages of 3D printing such as mixing, pumping, extrusion, multilayer casting and structural built-up in the printing layers. The relevant considerations include the concentration, size, morphology, chemical and mineralogical composition, the physical and chemical activity of the solid phase’s surface, and the ionic composition, viscosity, and density of the liquid phase. The squeezing test is used in this paper as a rheological behaviour identification tool of cement-based materials in order to evaluate the extrudability and buildability. It is shown that these properties are significantly influenced by the mix proportions such as W/C-ratio, concentration of plasticizer additives and viscosity modifier additives as factors of changes in the concentration of the dispersed phase and properties of the dispersion liquid.

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PHYSICAL AND CHEMICAL PROCESSES GOVERNING THE COMBUSTION OF BINARY COMPOSITIONS OF AMMONIUM DINITRAMIDE WITH GLYCIDYLAZIDEPOLYMER

International Journal of Energetic Materials and Chemical Propulsion ◽

10.1615/intjenergeticmaterialschemprop.v6.i2.60 ◽

2007 ◽

Vol 6 (2) ◽

pp. 213-228

Author(s):

Valery Sinditskii ◽

V. Y. Egorshev ◽

A. I. Levshenkov ◽

M. V. Berezin

Keyword(s):

Chemical Processes ◽

Ammonium Dinitramide ◽

Physical And Chemical

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THE FEATURES OF BIODESTRUCTION PROCESSES OF THE SURFACES OF HYDRAULIC ENGINEERING CONSTRUCTIONS

Proceedings of International Conference "Managinag risks to coastal regions and communities in a changinag world" (EMECS'11 - SeaCoasts XXVI) ◽

10.31519/conferencearticle_5b1b942983b288.82436639 ◽

2017 ◽

Author(s):

Marina Vasilenko ◽

Elena Goncharova ◽

Yury Rubanov ◽

...

Keyword(s):

Surface Layer ◽

Environmental Factors ◽

Food Chain ◽

Building Materials ◽

Microbial Growth ◽

Mineralogical Composition ◽

Mechanical Action ◽

Chemical Processes ◽

Hydraulic Engineering ◽

Optimal Conditions

The surfaces of building materials of hydrotechnical constructions undergo the process of algae biofouling. The degree of damage depends on the environmental factors that are affect-ed by the level of anthropogenic load areas. Modeling the biofouling process of concrete with algae under laboratory conditions has allowed determining their impact on the building ma-terial, accompanied by changes in chemical and mineralogical composition of the surface of products. The microscopic examination of sample’s surfaces and evaluation of the effective-ness of various ions leaching from building materials shows the results of "algal attack" relat-ed to the acceleration of biodegradation of materials under the influence of aggressive meta-bolic products, mechanical action neoplasms, creating optimal conditions for the development of subsequent aerobic microbial decomposers. To clarify the nature of chemical processes in the system “algocenosis – concrete” the changes of chemical and phase (mineralogical) com-position of the surface layer of concrete sample were studied. The effect that algae produce on hydraulic engineering constructions is due to the fact that these organisms, belonging to phototrophs and standing at the beginning of the food chain, initiate new microbial growth.

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Influence of Ethanol and Water on Physical and Chemical Processes of Splitting of Paracetamol and Glycine

Journal of Nano- and Electronic Physics ◽

10.21272/jnep.9(6).06022 ◽

2017 ◽

Vol 9 (6) ◽

pp. 06022-1-06022-6

Author(s):

A. G. Barylka ◽

◽

R. M. Balabai ◽

Keyword(s):

Chemical Processes ◽

Physical And Chemical

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THE FEATURES OF BIODESTRUCTION PROCESSES OF THE SURFACES OF HYDRAULIC ENGINEERING CONSTRUCTIONS

Proceedings of International Conference "Managinag risks to coastal regions and communities in a changinag world" (EMECS'11 - SeaCoasts XXVI) ◽

10.21610/conferencearticle_58b4315392c8d ◽

2017 ◽

Author(s):

Marina Vasilenko ◽

Elena Goncharova ◽

Yury Rubanov ◽

...

Keyword(s):

Surface Layer ◽

Environmental Factors ◽

Food Chain ◽

Building Materials ◽

Microbial Growth ◽

Mineralogical Composition ◽

Mechanical Action ◽

Chemical Processes ◽

Hydraulic Engineering ◽

Optimal Conditions

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Nucleophilicity and its parametrization

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19890117 ◽

1989 ◽

Vol 54 (1) ◽

pp. 117-135

Author(s):

Oldřich Pytela ◽

Vítězslav Zima

Keyword(s):

Regression Analysis ◽

Linear Correlation ◽

Correlation Equation ◽

Chemical Processes ◽

General Tendency ◽

Orbital Interaction ◽

Physico Chemical ◽

Physical And Chemical ◽

Two Parameter ◽

Better Than

The method of conjugate deviations based on the regression analysis has been suggested for construction of a new nucleophilicity scale. This method has been applied to a set of 28 nucleophiles participating in 47 physical and chemical processes described in literature. The two-parameter nucleophilicity scale obtained represents-in the parameter denoted as ND-the general tendency to form a bond to an electrophile predominantly on the basis of the orbital interaction and-in the parameter denoted as PD-the ability to interact with a centre similar to the proton (basicity). The linear correlation equation involving the ND, PD parameters and the charge appears to be distinctly better than the most significant relations used. The correlation dependences have the physico-chemical meaning. From the position of individual nucleophiles in the space of the ND and PD parameters, some general conclusions have been derived about the factors governing the reactivity of nucleophiles.

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The Tree

10.1093/oso/9780198824589.003.0009 ◽

2018 ◽

Author(s):

Andrew Steane

Keyword(s):

Carbon Capture ◽

Chemical Processes ◽

Physical And Chemical

The life of an ordinary tree is described, in terms of the main physical and chemical processes: carbon capture by photosynthesis; entropy and energy; moisture. The information expressed in the tree comes partly from the DNA and partly from the sunlight. The tree does not push upwards from the ground, but solidifies the air.

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