Numerical Modeling of Water-Soluble Sodium Silicate Gel System for Fluid Diversion and Flow-Zone Isolation in Highly Heterogeneous Reservoirs

2018 ◽  
Author(s):  
Tariq K. Khamees ◽  
Ralph E. Flori ◽  
Sherif M. Fakher
Keyword(s):  
Numerical Modeling ◽  
Sodium Silicate ◽  
Water Soluble ◽  
Flow Zone ◽  
Heterogeneous Reservoirs ◽  
Gel System

Priority Selection of Weak Gel Flooding Formula on Heterogeneous Reservoir

2014 ◽  
Vol 1073-1076 ◽  
pp. 2248-2251
Author(s):  
Wen Xiang Wu ◽  
Xin Song ◽  
Yue Fu ◽  
Peng Fei Yuan
Keyword(s):  
Gelation Time ◽  
High Viscosity ◽  
Development Stage ◽  
Water Flooding ◽  
Cross Linking ◽  
Heterogeneous Reservoirs ◽  
Weak Gel ◽  
Core Displacement ◽  
Selection Of ◽  
Gel System

Nowadays, most of the oilfields have been entered later development stage, it is difficult for reservoirs to depend on water flooding technology to improve recovery factor enormously. To satisfy deep flooding demand on heterogeneous reservoirs, the weak gel system is developed in the lab. Due to the mixture of organic chromium and HAPM, forming the organic weak gel system. HPAM concentration is from 1300mg/l to 1500mg/l and from 150mg/l to 210mg/l for cross-linking agent, the weak gel system formed stably with the high viscosity which is above 10000mp·s and moderate gelation time is from 45h to 130h.The best formula was selected with HPAM concentration 1500mg/l, and cross-linking agent concentration 210mg/l.The core displacement experiment shows the weak gel system has a well flooding effect on heterogeneous reservoirs, and its recovery rate increases 16.2%。

Modified Mechanism and Properties of Water-Soluble Sodium Silicate for Oil and Gas Field

2015 ◽  
Vol 814 ◽  
pp. 220-229
Author(s):  
Hong Xu Zhang ◽  
Yu Jie Zhao ◽  
Jia Zhuang ◽  
Hai Yang Qin ◽  
Han Ling Zhang
Keyword(s):  
Sodium Silicate ◽  
Oil And Gas ◽  
Ph Value ◽  
Water Soluble ◽  
Drilling Fluids ◽  
Gas Field ◽  
Structure Of Water ◽  
Oil And Gas Field ◽  
Inherent Nature ◽  
Poor Stability

With an analysis on the structure of water-soluble sodium silicate and its polymerization, it was found that the poor stability of silicate drilling fluids lies in the relevance between the inherent nature and the pH value of sodium silicate. The modification of water-soluble sodium silicate in this paper was to improve its stability and keep the inhibitive property simultaneously. The a-olefin sulfonate (AOS) was employed as the modifer agent acted on the water-soluble sodium silicate monomer and oligomers. Furthermore, the modification mechanism was discussed through FTIR, Laser particle size, Zeta potential and SEM. A stable sodium silicate drilling fluids with better inhibitive property was obtained by the comparison of modified sodium silicate and unmodified ones.

Numerical Modeling of Polymer-augmented Waterflooding in Heterogeneous Reservoirs

2013 ◽  
Author(s):  
Tadesse Weldu Teklu ◽  
Waleed Alameri ◽  
John Akinboyewa ◽  
Hossein Kazemi ◽  
Ramona M. Graves ◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Heterogeneous Reservoirs

Synthesis of fire retardants based on N and P and poly(sodium silicate-aluminum dihydrogen phosphate) (PSADP) and testing the flame-retardant properties of PSADP impregnated poplar wood

Holzforschung ◽  
2016 ◽  
Vol 70 (4) ◽  
pp. 341-350 ◽  
Author(s):  
Xiaoteng Zhang ◽  
Jun Mu ◽  
Demiao Chu ◽  
Yang Zhao
Keyword(s):  
Sodium Silicate ◽  
Synergistic Effects ◽  
Water Soluble ◽  
Dihydrogen Phosphate ◽  
Poplar Wood ◽  
Fire Retardants ◽  
Combustion Heat ◽  
Flame Retardant Properties ◽  
Wood Surfaces ◽  
Nitrogen Phosphorus

Abstract The development of fire retardants (FRs) is an approximative process of optimization. In this context, a novel water-soluble formulation with poly(sodium silicate-aluminum dihydrogen phosphate) (PSADP) has been developed, aiming at reduced hygroscopicity and enhanced leaching resistance of poplar wood in combination with nitrogen-phosphorus (NP) FR (FRNP). After treatment of wood with FRNP and PSADP in vacuum, the following data of the samples were determined: rate of hydroscopicity, leaching resistance, heat release rate (HRR), total HR (THR), effective combustion heat, mass loss, and concentration of flue gas. FR distribution in the wood’s inner surface was investigated by scanning electron microscopy (SEM) and energy-dispersive X-ray analysis (EDXA). Results show that PSADP and FRNP have favorable synergistic effects on moisture resistance and flame retardance. Smoke density (SD) of NP and PSADP treated samples shows a significant reduction relative to that of NP. NP-PSADP treated samples form more char with carbon layers of higher density. At the same time, FRNP-PSADP is evenly distributed over the inner wood surfaces and penetrates the cell cavities of the poplar wood.

scholarly journals Durability of geopolymer concrete exposed to acidic environment – a review

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Lathi Karthi ◽  
Peter Cibi
Keyword(s):  
Sodium Hydroxide ◽  
Silica Fume ◽  
Sodium Silicate ◽  
Structural Integrity ◽  
Water Soluble ◽  
Superior Performance ◽  
Alkaline Solutions ◽  
Geopolymer Concrete ◽  
Chemical Action ◽  
Acidic Solutions

Acids attack concrete by dissolving both hydrated and unhydrated cement compounds as well as calcareous aggregates and the subsequent chemical reaction forms water soluble calcium compounds which are then leached away. The aggressiveness of the reaction depends on the pH of the acidic medium and the types of salts formed. Concrete pipes made of ordinary portland cement (OPC) carrying sewage water have always the presence acidic solutions in it. They deteriorate and service life of the pipes is affected along with the increased maintenance costs and that process cause environmental impacts.  Geopolymer binders are novel binders that relies on alumina silicate rather calcium silicate bonds for structural integrity so they have been reported as being acid resistant. Those could be produced by the chemical action between alumino-silicate material such as fly ash(FA), granulated blast furnaces slag (GGBS), metakaoline or silica fume with alkaline solutions like sodium silicate or sodium hydroxide. Geopolymers show superior performance in terms of corrosion and fire resistance due to the absence of water and calcium in their structure.Utilisation of waste materials like FA and GGBS makes geopolymer    concrete (GPC) an environment friendly construction material. This review paper looks in to the effect of various acids such as sulphuric acid, acetic acid, nitric acids on durability properties of OPC specimens, GPC specimens and GPC composite specimens when immersed in acidic solutions for certain period. The performance of geopolymer is analysed by the visual inspection and studying the parameters like weight loss, loss in compressive strength and maximum depth of penetration. Keywords- Geopolymer concrete, Sodium hydroxide, sodium silicate, metakaoline, silica fume, alumina silicate

scholarly journals Preparation and Performance of Inorganic Heat Insulation Panel Based on Sepiolite Nanofibers

2014 ◽  
Vol 2014 ◽  
pp. 1-7
Author(s):  
Fei Wang ◽  
Jinsheng Liang ◽  
Haifeng Liu ◽  
Xinhui Duan ◽  
Qingguo Tang ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Energy Saving ◽  
Bulk Density ◽  
Sodium Silicate ◽  
Thermal Insulation ◽  
Heat Insulation ◽  
Synergistic Action ◽  
Water Soluble ◽  
Curing Agent ◽  
Sepiolite Nanofibers

High efficiency and low cost thermal insulation energy saving panel materials containing sepiolite nanofibers were developed by means of the synergistic action of inorganic adhesive, curing agent, and hydrogen peroxide. The water soluble sodium silicate was used as inorganic adhesive, and the sodium fluorosilicate was chosen as curing agent. Moreover, appropriate amount of hydrogen peroxide was added in order to decrease the bulk density and improve the heat insulation performance of panel materials. The results showed that the synergistic action of inorganic adhesive, curing agent, and hydrogen peroxide could make thermal insulation energy saving panel materials have low bulk density and high mechanical performance, and the optimal process was as follows: 120°C of drying temperature, 1.6% of sodium silicate as inorganic adhesive, 12% of sodium fluorosilicate as curing agent in sodium silicate, and 2.5% of hydrogen peroxide. The thermal insulation energy saving panel materials as prepared could arrest heat transmission and resist external force effectively.

scholarly journals The Influence of Various Matrixes on the Strength Properties of Moulding Sands with Thermally Hardened Hydrated Sodium Silicate for the Ablation Casting Process

2021 ◽  
Vol 5 (2) ◽  
pp. 31-35
Author(s):  
Katarzyna Major-Gabryś ◽  
Sabina Puzio ◽  
Agata Bryłka ◽  
Jadwiga Kamińska
Keyword(s):  
Sodium Silicate ◽  
Casting Process ◽  
Strength Properties ◽  
Water Soluble ◽  
Review Of Literature ◽  
Casting Technology ◽  
Single Use ◽  
Different Content ◽  
Sufficient Strength ◽  
Selection Of

The essence of ablation casting technology consists in pouring castings into single-use moulds made from the mixture of sand and a water-soluble binder. After pouring the mould with liquid metal yet while the casting is still solidifying, the mould destruction (washing out, erosion) takes place using a stream of cooling medium, which in this case is water. This paper focuses on the selection of  moulding sands with hydrated sodium silicate for moulds used in ablation casting. The research is based on the use of water glass 145 and 150 as binders. As part of the research, loose moulding mixtures based on two silica sands from different sand mines with different content of binders were prepared. The review of literature data and the results of own studies have shown that moulding sand with hydrated sodium silicate hardened by dehydration is characterized by sufficient strength properties to be used in the ablation casting process. Our own research also confirmed the possibility of using these sand mixtures in terms of both casting surface quality and sand reclamation. The results presented in this paper prove that both sand grains and types of binder tested may be used as components in moulding sands devoted to ablation casting.

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