scholarly journals PRINCIPAL APPROACHES TO CREATION OF POLYMER COMPOSITIONS - ANALOGUES OF XANTHAN GUM FOR THE INTENSIFICATION OF OIL AND GAS PRODUCTION

2020 ◽  
pp. 102-108
Author(s):  
V. A. Kozlovtsev ◽  
T. P. Aleinikova ◽  
A. B. Golovanchikov ◽  
E. V. Kozlovtsev ◽  
M. S. Povetkin ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Polyvinyl Alcohol ◽  
Xanthan Gum ◽  
Oil And Gas ◽  
Gas Production ◽  
Water Soluble ◽  
Sodium Tetraborate ◽  
Oil And Gas Production ◽  
Water Soluble Polymers ◽  
Soluble Polymers

This article analyzes the effectiveness of the use of xanthan gum for drilling and oil and gas production. It is shown that water-soluble polymers can perform such functions after their structuring and the introduction of additional reagents that regulate the amount of hydrogen bonds between the limited swellable mini-gels. The option of creating such a composition based on polyvinyl alcohol modified with epichlorohydrin and sodium tetraborate is given.

Novel Drag-Reducing Agents for Fracturing Treatments Based on Polyacrylamide Containing Weak Labile Links in the Polymer Backbone

SPE Journal ◽  
2012 ◽  
Vol 17 (03) ◽  
pp. 924-930 ◽  
Author(s):  
E.. Kot ◽  
R.K.. K. Saini ◽  
L.R.. R. Norman ◽  
A.. Bismarck
Keyword(s):  
Molecular Weight ◽  
Oil And Gas ◽  
Elevated Temperatures ◽  
Reducing Agents ◽  
Reducing Agent ◽  
Water Soluble ◽  
Weak Links ◽  
Polymer Backbone ◽  
Water Soluble Polymers ◽  
Soluble Polymers

Summary Water-soluble polymers have found extensive use in the oil and gas industry. For instance, high-molecular-weight polymers are very efficient drag-/friction-reducing agents and viscosifiers. Unfortunately, the adsorption of the polymer on the reservoir formation reduces the effectiveness of the recovery of oil and gas from low-permeability formations, such as shale. The availability of water-soluble polymers containing weak links in the backbone of the polymer that can be degraded upon experiencing a certain trigger, such as temperature, pH, or reducing agent, would be very advantageous. Because of the ability of weak links to degrade under certain conditions, such polymers can be used for their intended application and can afterward be degraded in a controlled and predetermined way. The resulting lower-molecular-weight fractions of that polymer lead to a reduced viscosity and quick partitioning into the water phase, and they are also less likely to adsorb onto formation surfaces. Additionally, no oxidizers need to be pumped to break or clean the deposited polymer, thus saving treatment time. It has been proved that using a bifunctional reducing agent containing degradable groups and oxidizing metal ions as a redox couple is an effective method to initiate free-radical polymerization and build degradable groups into the backbone of vinyl polymers. Temperature-degradable but hydrolytically stable azo groups showed the most-desirable results. The presence of azo groups in the backbone of the synthesized polyacrylamide (PAM) was confirmed by H1-NMR spectra and differential scanning calorimetry (DSC). The degradation behavior of the PAM with temperature-sensitive azo groups was characterized using gel permeation chromatography (GPC) and proved that multiple labile links were built into the polymer backbone. It was also found that PAM with azo links in the polymer backbone is as good a drag-reducing agent as pure PAM. However, PAM with azo links in the backbone loses its drag-reduction properties once subjected to elevated temperatures, which for some applications is viewed as an advantage.

Improving Gas Bubbles’ Half Life in Foam Drilling Fluid

2013 ◽  
Vol 62 (1) ◽  
Author(s):  
Issham Ismail ◽  
Nur Suriani Mamat ◽  
Baihaqi Mamat ◽  
Ahmad Shamsulizwan Ismail ◽  
Azmi Kamis ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Xanthan Gum ◽  
Drilling Fluid ◽  
Water Soluble ◽  
Polymer Foam ◽  
Water Soluble Polymers ◽  
Stable Foam ◽  
Soluble Polymers ◽  
The Stability ◽  
Foam Drilling

An underbalanced drilling using foam drilling fluid is one of the most effective solutions which are capable of preventing formation damage, differential sticking, or circulation lost. Nevertheless, the limitation of using foam drilling fluid is the stability of its rheological properties which would affect its lubricity characteristics. Therefore, a research study was carried out to determine the stability and effectiveness of water soluble polymers as an additive in foam drilling fluid. To produce the required and most stable foam, four types of surfactants had been tested, namely sodium dodecyl sulfate (anionic), cetyltrimethylammonium bromide (cationic), T×100 (non ionic), and n-alkyl betaines (amphoteric). Then, the water soluble polymers, namely xanthan gum, hydroxyethyl cellulose, guar gum, and carboxymethyl cellulose, were evaluated as a stabilizer in the said foam drilling fluid. The laboratory works involved lubricity and rheological properties tests, which were conducted at ambient condition. The experimental results showed that the use of xanthan gum with anionic surfactant produced the most stable foam drilling fluid compared to other polymers. Rheological properties of the polymer foam drilling fluid were compared with water-based mud, and it was revealed that polymer foam drilling fluid could perform as effective as the latter. The significant advantage of using polymer foam drilling fluid was its coefficient of friction which was found to be lower than the water-based mud. 

scholarly journals An orthorhombic polymorph of 2-(1,3,5-dithiazinan-5-yl)ethanol or MEA-dithiazine

2022 ◽  
Vol 78 (2) ◽  
Author(s):  
Nate Schultheiss ◽  
Jeremy Holtsclaw ◽  
Matthias Zeller
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Oil And Gas ◽  
Polymorphic Form ◽  
Gas Production ◽  
Orthorhombic Space Group ◽  
Oil And Gas Production ◽  
Space Group ◽  
One Dimensional ◽  
Centrosymmetric Dimers

Substituted triazines are a class of compounds utilized for scavenging and sequestering hydrogen sulfide in oil and gas production operations. The reaction of one of these triazines under field conditions resulted in the formation of the title compound, 2-(1,3,5-dithiazinan-5-yl)ethanol, C5H11NOS2, or MEA-dithiazine. Polymorphic form I, in space group I41/a, was first reported in 2004 and its extended structure displays one-dimensional, helical strands connected through O—H...O hydrogen bonds. We describe here the form II polymorph of the title compound, which crystallizes in the orthorhombic space group Pbca as centrosymmetric dimers through pairwise O—H...N hydrogen bonds from the hydroxyl moiety to the nitrogen atom of an adjacent molecule.

scholarly journals Achieving optimal micro-explosions in stable emulsions by adding water-soluble polymers

2022 ◽  
Author(s):  
Cao Liu ◽  
Tianchun Xiao ◽  
Lingrui Cui ◽  
Lian CEN ◽  
Jinshan XU ◽  
...  
Keyword(s):  
Surface Tension ◽  
Interfacial Tension ◽  
Surface Activity ◽  
Xanthan Gum ◽  
Emulsion Stability ◽  
Water Soluble ◽  
Water Soluble Polymers ◽  
Soluble Polymers ◽  
Strong Surface ◽  
First Time

The emulsified feedstock technique is to improve the performance of products by using the micro-explosion phenomenon of emulsion. However, an obstacle to some applications of this technology is the contradiction between emulsion stability and micro-explosion intensity. For the first time, adding water-soluble polymers was proposed to solve this problem. Two polymers of xanthan gum (XG) and nonionic polyacrylamide (NPAM) were investigated and the results show that micro-explosions have five forms. As one of these five forms, the intensity of optimal micro-explosion is three orders of magnitude higher than other forms, and adding 0.5% XG increases the probability of optimal micro-explosion from 0% to 60% due to the low surface activity, strong thickening and pseudoplasticity of XG solutions. By contrast, NPAM does not promote micro-explosion because of its strong surface activity. Finally, a new mechanism for micro-explosions related to surface tension, interfacial tension and viscosity is proposed.

Sign in / Sign up

Export Citation Format

Share Document