Performance Evaluation of Polycarboxylic Acid Dispersant for Oil Well Cementing

2020 ◽  
Vol 993 ◽  
pp. 1341-1350
Author(s):  
Xiu Jian Xia ◽  
Yong Jin Yu ◽  
Jian Zhou Jin ◽  
Shuo Qiong Liu ◽  
Ming Xu ◽  
...  
Keyword(s):  
High Temperature ◽  
Salt Resistance ◽  
Strength Development ◽  
Fluid Loss ◽  
Oil Well ◽  
Polycarboxylic Acid ◽  
Cement Slurry ◽  
Deep Wells ◽  
Oil Well Cement ◽  
Well Cement

The conventional oil-well cement dispersant has the characteristics of poor dispersion at high temperature, poor compatibility with other additives, and environmental pollution during the production process. In this article, with ultra-early strong polyether monomer, acrylic acid, 2-acrylamine-2-methylpropyl sulfonic acid, sodium methacrylate as copolymer monomers, an environmentally friendly polycarboxylic acid dispersant, DRPC-1L, was prepared by the aqueous solution free-radical polymerization. The chemical composition and thermal stability of the synthetic copolymer were characterized by FTIR and TGA techniques. The evaluation results show that DRPC-1L has a wide temperature range (30~210 °C), good salt-resistance and dispersing effect. It can significantly improve the rheological performance of cement slurry, and it is well matched with oil-well cement additives such as fluid loss agent, retarder and so on. Moreover, it is beneficial to the mechanical strength development of set cement, especially the early compressive strength. It can also inhibit the abnormal gelation phenomenon of cement slurry, flash set, that occurs during high temperature thickening experiments, which plays an important role in enhancing the comprehensive performance of cement slurry. Consequently, the novel polycarboxylic acid dispersant has good application prospects in deep and ultra-deep wells cementing.

Synthesis and Properties of Dispersive Type High Temperature Filtrate Reducer Used in Oil Well Cement

2013 ◽  
Vol 734-737 ◽  
pp. 2136-2140
Author(s):  
Di Hui Ma ◽  
Zhen Wei ◽  
Zong Gang Wang
Keyword(s):  
High Temperature ◽  
Rheological Property ◽  
Mass Fraction ◽  
Salt Resistance ◽  
Fluid Loss ◽  
Oil Well ◽  
Cement Slurry ◽  
Oil Well Cement ◽  
Cement Strength ◽  
Well Cement

The advanced dispersive type high temperature filtrate reducer used in oil well cement was synthesized with 2-acryloyl-2-methyl-propyl sulfonic (AMPS) , N, N-dimethylacrylamide (DMAA) and organic acids. When the mass fraction of synthetic filtrate reducer was 1%, the filter loss of the cement slurry was 30ml/30min at 120 °C and 49ml/30min at 150°C respectively, and the cement strength was 25MPa after 24 hours, and the rheological property of the cement slurry was well when the mass fraction of synthetic filtrate reducer was 2%, and liquidity factor was 0.85, and the consistency was 0.43. The results showed that the filtrate reducer had good dispersity and could control the fluid loss efficiently, and the ability of resistance to high temperature and salt resistance was good.

Development and Change of Compressive Strength for Class G Oil Well Cement under High Temperature

2014 ◽  
Vol 941-944 ◽  
pp. 1441-1444 ◽  
Author(s):  
Jing Fu Zhang ◽  
Kai Liu ◽  
Rui Xue Hou ◽  
Bo Wang ◽  
Jin Long Yang
Keyword(s):  
Compressive Strength ◽  
High Temperature ◽  
Initial Period ◽  
Strength Development ◽  
Oil Well ◽  
Curing Time ◽  
Cement Slurry ◽  
Critical Temperatures ◽  
Oil Well Cement ◽  
Well Cement

The compressive strength of oil well cement would be damaged by high temperature in deep oil wells, which was caused by the obvious change of the components and microstructure of cement hydration products. The adaptability of common oil well cement for cementing under higher temperatures was confined by above reasons. Characteristics of development and change of compressive strength of Class G oil well cement were studied under different temperatures by using Static Gel Strength Analyzer and High Temperature-High Pressure curing chamber. The influence law of temperature and silica sands on compressive strength was analyzed. The results showed that the critical temperatures at which the compressive strength begun to decline were about 110°C and 150°C respectively; The compressive strength increased with curing time during the initial period and would reduced after it reached a certain value when temperature exceeded 110°C; For cement with silica sands, the compressive strength development trend was in the shape of two-stage form with increase of curing time within the range of 110~150°C, but for 160~200°C temperature range the development form was in the shape of single stage; The reasonable amounts of silica sands which would be added to cement slurry to enhance the compressive strength of hardening paste were determined to be 30%~40%.

Development of Functional Polymer as Oil-Well Cement Retarder

2015 ◽  
Vol 814 ◽  
pp. 191-198 ◽  
Author(s):  
Xiu Jian Xia ◽  
Jin Tang Guo ◽  
Shuo Qiong Liu ◽  
Jian Zhou Jin ◽  
Yong Jin Yu ◽  
...  
Keyword(s):  
High Temperature ◽  
Ultrasonic Method ◽  
Strength Development ◽  
Cement Stone ◽  
Oil Well ◽  
Cement Slurry ◽  
Oil Well Cement ◽  
Cement Retarder ◽  
The Stability ◽  
Well Cement

In this study, a novel polymer retarder DRH-200LG was synthesized to solve the problems of retarding failure, strong dispersivity under high temperature and adverse impact on the strength development of cement stone. The composition of the polymer was confirmed by IR, and its thermal stability was proved by DSC, TG analysis and thermal treatment at 200 °C. Furthermore, the stability and strength development of cement slurry was evaluated by the comparative consistency method and ultrasonic method, respectively. The results show that DRH-200LG has good high temperature-resistance and retarding performance, presenting favourable influence on the stability and strength development of cement slurry. DRH-200LG shows a good application prospect in the cementation of deep & ultra-deep wells. And it has some guiding significance in the research and innovation of a novel polymer used as oil well cement retarder.

scholarly journals Effect of Nano-SiO2, Nano-TiO2 and Nano-Al2O3 Addition on Fluid Loss in Oil-Well Cement Slurry

2019 ◽  
Vol 13 (1) ◽  
Author(s):  
Mtaki Thomas Maagi ◽  
Samwel Daud Lupyana ◽  
Jun Gu
Keyword(s):  
Water Filtration ◽  
Collective Impact ◽  
Fluid Loss ◽  
Oil Well ◽  
Hydration Products ◽  
Ternary Blends ◽  
Cement Slurry ◽  
Nano Tio2 ◽  
Oil Well Cement ◽  
Well Cement

AbstractIn this article, incorporation of nano-SiO2 (NS), nano-TiO2 (NT) and nano-Al2O3 (NA) particles and their binary and ternary blends on water filtration in oil-well cement slurry was examined. The nanoparticle contents were chosen at proportions corresponding to 1, 2, 3 and 4% based on the weight of cement. The experimental specimens were tested at three various temperatures of 70, 80 and 90 °C using a gas pressure of 1000 psi. The quantity of water filtrate collected was measured in milliliter (mL) at 30 min after the test begins. The results consistently indicate that an additional of NS, NT and NA particles independently, reduced the loss of liquid in cement, and its performance varies with temperature and the nanoparticle dosages. The 3% NS usage delivered strong evidence in lessening fluid loss compared to the other results by reducing the loss up to 72%. When collective impact of nanomaterials was determined, the fluid retainment was also improved. The replacement of 4% NST reduced fluid loss by the most compared to NSA and NTA binary groups. In-case of ternary combination, NSTA showed a highest reduction of the water loss by 58–60% likened to the plain samples at the concentration of 4%. The key investigation of this paper clearly suggested that the efficacy of Class G cement having nanoparticles to trap its water is dependent on the nanoparticle contents. The lessening of water filtration might be explicated by the filling capability of nano-scale particles. Nanoparticles can plug the openings within the oil-well cement slurry matrix, thus promoting the retainability of water. Besides, nanoparticles quickens the hydration products by creating dense interlocking C–S–H gels for bridging cement grains and forming enclosed structure which can stop the liquid from escaping the slurry.

Synthesis and performance of a self crosslinkable acrylate copolymer with high compatibility for an oil well cement modifier

2014 ◽  
Vol 34 (5) ◽  
pp. 405-413
Author(s):  
Xianru He ◽  
Qian Chen ◽  
Chunhui Feng ◽  
Liang Wang ◽  
Hailong Hou
Keyword(s):  
High Performance ◽  
Oil And Gas ◽  
High Strength ◽  
Ammonium Persulfate ◽  
Fluid Loss ◽  
Oil Well ◽  
Cement Slurry ◽  
Oil Well Cement ◽  
Well Cement ◽  
Loss Control

Abstract High performance cement slurry polymer modifiers are increasingly in demand in the cementing process of oil and gas. A new polymer modifier with outstanding fluid loss control and high strength and toughness was synthesized by the main monomers butyl acrylate (BA), methyl methacrylate (MMA), acrylamide (AM), the functional monomers vinyltriethoxysilane (VTS), glycidyl methacrylate (GMA) and the initiator of ammonium persulfate (APS) through emulsion polymerization. By using Fourier transform infrared (FTIR) spectrometer, a laser particle analyzer, a scanning electron microscope and a differential scanning calorimeter, we studied the mechanism of fluid loss control and microstructure of polymer latex cement slurries. The experimental results showed that the copolymer could be crosslinked at 160°C and have the lowest fluid loss control, 12 ml, when the polymer content reached 5%. Acrylate latex modified by the silane coupling agent VTS had excellent performance on fluid loss control, as well as mechanical properties for oil well cement. These results have a potential significant value for the development of a new polymer cement modifier with high thermal stability and durability.

Salt-Tolerance Performance of Oil Well Cement Fluid Loss Additive SSS/HAM/IA

2020 ◽  
Vol 993 ◽  
pp. 1351-1355
Author(s):  
Wei Yuan Xiao ◽  
Ming Li ◽  
Dong Bo Xie
Keyword(s):  
Salt Tolerance ◽  
Water Loss ◽  
Environmental Scanning Electron Microscopy ◽  
Environmental Scanning ◽  
Fluid Loss ◽  
Oil Well ◽  
Cement Slurry ◽  
Oil Well Cement ◽  
Well Cement ◽  
Fluid Loss Additive

In order to study the effect of brine environment on the performance of oil well cement fluid loss additive (FLA) sodium p-styrene sulfonate/N-methylol acrylamide/itaconic acid (SSS/HAM/IA), the water loss of three different cement slurry systems added with different FLA additions (fresh water cement slurry, semi-saturated brine cement slurry and saturated brine cement slurry) were tested at 90°C and 150°C. The results show that SSS/HAM/IA has good salt tolerance. The water loss of three cement slurry systems was controlled within 100mL with FLA addition adjusted in the range of 1%~3% below 150 °C. The salt tolerance mechanism of SSS/HAM/IA was analyzed based on the microstructure of the three system terpolymer solutions characterized under environmental scanning electron microscopy (ESEM).

scholarly journals A Novel Terpolymer as Fluid Loss Additive for Oil Well Cement

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Ming Li ◽  
Dongbo Xie ◽  
Zihan Guo ◽  
Ya Lu ◽  
Xiaoyang Guo
Keyword(s):  
Molecular Weight ◽  
Gel Permeation Chromatography ◽  
Fluid Loss ◽  
Oil Well ◽  
Gravimetric Analysis ◽  
Cement Slurry ◽  
Free Radical Copolymerization ◽  
Oil Well Cement ◽  
Well Cement ◽  
Fluid Loss Additive

A terpolymer comprised of sodium styrene sulfonate (SSS), fumaric acid (FA), and acrylamide (AM) was synthesized by aqueous free radical copolymerization and evaluated as fluid loss additive for oil well cement. The chemical structure and performance of the terpolymer were characterized by Fourier transform infrared (FTIR) spectroscopy and thermal gravimetric analysis (TGA); the molecular weight and its distribution were determined by gel permeation chromatography (GPC). The optimum reaction conditions of polymerization were obtained: a reaction temperature of 50°C, a mass ratio of SSS/FA/AM 4 : 2 : 14, initiator 0.1%, and reaction time of 4 h; characterization indicated that the SSS/FA/AM had a certain molecular weight and excellent temperature-resistant and salt-resistant properties. The results show that SSS/FA/AM has a good fluid loss performance, in which the API fluid loss of the oil cement slurry could be controlled within 100 mL at 160°C. In addition, it had little effect on the cement compressive strength. The results of scanning electron microscopy (SEM) of the filter cake showed that SSS/FA/AM could be adsorbed on the surface of the cement particles and produce a hydrated layer to prevent fluid loss from the oil well cement.

scholarly journals Synergistic Effect of Latex Powder and Rubber on the Properties of Oil Well Cement-Based Composites

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Jianjian Song ◽  
Mingbiao Xu ◽  
Weihong Liu ◽  
Xiaoliang Wang ◽  
Yumeng Wu
Keyword(s):  
Synergistic Effect ◽  
External Load ◽  
Oil And Gas ◽  
Fluid Loss ◽  
Cement Stone ◽  
Oil Well ◽  
Cement Slurry ◽  
Sem Images ◽  
Oil Well Cement ◽  
Well Cement

The brittleness and the poor resistance to external load of oil well cement impede the development of oil and gas wells. To overcome these deficiencies, latex powder or rubber and their hybrid combinations were used to modify the oil well cement. The conventional properties, mechanical properties, and scanning electron microscopy (SEM) images of the modified cement were analyzed. In comparison with latex powder-incorporated cement and rubber-incorporated cement, a significant improvement of fluid loss, flexural strength, impact strength, and elasticity of the cement slurry was observed when using the hybrid combinations of 3 wt.% latex powder and 2 wt.% rubber, although this synergistic effect was not remarkable on the compressive strength and the thickening time. These evidences arose from the synergism between latex powder and rubber leading to the formation of a three-dimensional network structure and a flexible structure which subsequently improved the elasticity and toughness of cement stone. The improved elastic matrix has a buffering effect on external impact when the cement stone is subjected to an external load.

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