Research Status of Synthetic Oil Well Cement Retarder

2020 ◽  
Vol 14 ◽  
Author(s):  
Guo Zihan ◽  
Liu Ziyang ◽  
Liao Kai ◽  
Yang Xianghui
Keyword(s):  
Great Influence ◽  
Large Temperature ◽  
Strength Development ◽  
Cement Stone ◽  
Oil Well ◽  
Research Status ◽  
Synthetic Oil ◽  
Oil Well Cement ◽  
Cement Retarder ◽  
Well Cement

: Oil well cement retarder is an additive that can extend time for thickening cement slurry, which can ensure the safety of cement. At present, the oil well cement retarder is mainly composed of synthetic materials, which are mainly divided into three major categories: compound polymer, AMPS polymer and non-AMPS. In this paper, the research status of synthetic oil well cement retarder in recent years is reviewed, and its shortcomings and development trends are analyzed. It is pointed out that the shortage of synthetic retarder mainly lies in problems, including large temperature sensitivity, small temperature application range, abnormal thickening curve, great influence on high temperature settlement stability and cement stone strength development. The development direction of oil well cement retarder is mainly focused on developing intelligent retarder and degradable retarder to meet the cementing needs of oilfields and ensure cementing effect increasing steadily.

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 carboxylic group on the compatibility with retarder and the retarding side effect of the fluid loss control additive used in oil well cement

2018 ◽  
Vol 5 (9) ◽  
pp. 180490 ◽  
Author(s):  
Shenglai Guo ◽  
Yao Lu ◽  
Yuhuan Bu ◽  
Benlin Li
Keyword(s):  
Carboxylic Acid ◽  
Side Effect ◽  
Great Influence ◽  
Acid Group ◽  
Field Application ◽  
Fluid Loss ◽  
Oil Well ◽  
Oil Well Cement ◽  
Well Cement ◽  
Loss Control

The retarding side effect and the compatibility with other additives are the main problems that limit the field application of the synthesized fluid loss control additive (FLCA). The effect of the type and content of carboxylic acid groups on the retarding side effect of FLCA and the compatibility between FLCA and the retarder AMPS-IA synthesized using 2-acrylamido-2-methyl propane sulfonic acid (AMPS) and itaconic acid (IA) was studied in this paper. The type and content of carboxylic acid group have a great influence on the fluid loss control ability, the compatibility with retarder and the retarding side effect of FLCA. FLCA containing IA or maleic acid (MA) shows better compatibility with retarder than FLCA containing acrylic acid, but the retarding side effect of FLCA containing MA is weaker than that of FLCA containing IA. Thus, MA is the most suitable monomer for synthesizing FLCA having good compatibility with retarder AMPS-IA.

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.

Laboratory Study on Low Temperature Rapid Strength Cement Slurry

2011 ◽  
Vol 287-290 ◽  
pp. 3127-3130 ◽  
Author(s):  
Zao Yuan Li ◽  
Chao Zhou ◽  
Jia Ying Li ◽  
Qi Bing Wu ◽  
Xiao Yang Guo
Keyword(s):  
Low Temperature ◽  
Great Influence ◽  
Oil Well ◽  
Cement Slurry ◽  
Stability Properties ◽  
Oil Well Cement ◽  
Slurry Rheology ◽  
Early Strength ◽  
Gas Channeling ◽  
Well Cement

In the construction of the conductor casing and surface casing cementing, due to the low bottom hole circulating temperature(BHCT), the compressing strength of oil well cement development slowly, waiting on cement(WOC)need a long time, an increase of drilling costs, could easily lead to annular gas channeling, and have a bad effect on cement job quality and safety of operations. For the type of current domestic oil well cement early strength agent are few, The effective of some early strength agent are not satisfied. Some are Corrosive to the casing, and have a great influence on slurry rheology and other issues. Laboratory selected a new compound early strength agent with on chlorine and containing crystal seed.The thickening time, compressive strength, settlement stability properties, anti-gas channeling ability and other parameters of the slurry are tested. The results show that: There are some advantages of the cement slurry like right-angle-set, low temperature rapid strength, excellent settlement stability properties, and strong ability of anti-gas channeling and form a low density cement slurry which density range from 1.30 to 1.90g/cm3, it provide a reliable guarantee to cementing operation in shallow well with low-temperature under the different reservoir pressure.

Mechanical Properties and Microstructure of Epoxy Resin Enhanced Oil-Well Cement Stone

2019 ◽  
Vol 944 ◽  
pp. 1103-1107
Author(s):  
Ming Dan He ◽  
Ming Li ◽  
Yong Jin Yu ◽  
Hao Wang ◽  
Wei Yuan Xiao ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Epoxy Resin ◽  
Performance Testing ◽  
Cement Stone ◽  
Oil Well ◽  
Oil Well Cement ◽  
Waterborne Epoxy ◽  
Waterborne Epoxy Resin ◽  
Well Cement

To adequately understand the waterborne epoxy resin and enhance the compressive, tensile strength of oil-well cement stone, the cement composite materials were prepared with different addition of waterborne epoxy resin, and the specimens were cured for 3days, 7 days, 14days, 28days at 50°C thermostatic water bath to test the compressive strength and tensile strength, respectively. The results showed when the content of resin emulsion is 30%, the compressive strength and tensile strength of the cement are increased by 303.09% and 306.04% compared with pure cement, respectively. Obviously, in the mechanical performance testing, oil-well cement stone modified by waterborne epoxy resin have been significantly improved compared with the pure cement. To explore the enhanced microstructure of oil-well cement modified with waterborne epoxy resin, the cement specimens were prepared with 30% waterborne epoxy resin analyzed by scanning electron microscopy (SEM).

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