Oil Well Cement Static Gel Strength Development Comparison Between Ultrasonic and Intermittent Rotational Measurement Methods

2016 ◽  
Author(s):  
Shameed Ashraf ◽  
Paul Hamilton ◽  
Amir Gheisar Salehpour ◽  
Cinto Azwar ◽  
Martijn Bogaerts
Keyword(s):  
Gel Strength ◽  
Measurement Methods ◽  
Strength Development ◽  
Oil Well ◽  
Oil Well Cement ◽  
Well Cement

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.

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 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%.

scholarly journals Influence of Cellulose Nanoparticles on Rheological Behavior of Oil Well Cement-Water Slurries

Materials ◽  
2019 ◽  
Vol 12 (2) ◽  
pp. 291 ◽  
Author(s):  
Zhengjie Tang ◽  
Runzhou Huang ◽  
Changtong Mei ◽  
Xiuxuan Sun ◽  
Dingguo Zhou ◽  
...  
Keyword(s):  
Yield Stress ◽  
Cellulose Nanofibers ◽  
Gel Strength ◽  
Oil Well ◽  
Rotational Viscometer ◽  
Rheological Models ◽  
Cellulose Nanoparticles ◽  
Water To Cement Ratio ◽  
Oil Well Cement ◽  
Well Cement

Performance of hardened oil well cement (OWC) is largely determined by the rheological properties of the cement slurries. This work was carried out to investigate the effect of water- to-cement ratio (WCR) and cellulose nanoparticles (CNPs), including cellulose nanofibers (CNFs) and cellulose nanocrystals (CNCs), on rheology performance of OWC-based slurries using a Couette rotational viscometer coupled with rheological models. The yield stress and viscosity of neat OWC slurries had a decreasing trend with the increase of WCRs. The suspension became increased unstable with the increase of WCRs. The properties of CNPs, including rheological behaviors, surface properties and morphology, determine the rheological performance of CNP-OWC slurries. In comparison with CNC-OWC slurries, the gel strength, yield stress and viscosity of CNF-OWC slurries were higher as CNFs were more likely to form an entangled network. The gel strength, yield stress and viscosity of CNP-OWC slurries increased with reduced CNF size through regrinding and the proportion of CNFs in the mixture of CNFs and CNCs, respectively.

Pore structure evolution and strength development of G-type elastic oil well cement. A combined 1H NMR and ultrasonic study

2015 ◽  
Vol 72 ◽  
pp. 90-97 ◽  
Author(s):  
E. Karakosta ◽  
L. Lagkaditi ◽  
S. ElHardalo ◽  
A. Biotaki ◽  
V.C. Kelessidis ◽  
...  
Keyword(s):  
Pore Structure ◽  
1H Nmr ◽  
Structure Evolution ◽  
Strength Development ◽  
Oil Well ◽  
Ultrasonic Study ◽  
Oil Well Cement ◽  
Well Cement

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.

Effect of Carbon Dioxide Curing on Strength Development of Cement Mortar

2017 ◽  
Vol 748 ◽  
pp. 323-327 ◽  
Author(s):  
Ming Gin Lee ◽  
Wei Chien Wang ◽  
Yi Shuo Huang ◽  
Yu Min Su ◽  
Quan Zhou Jiang
Keyword(s):  
Compressive Strength ◽  
Pressure Drop ◽  
Temperature Rise ◽  
Mass Gain ◽  
Strength Development ◽  
Oil Well ◽  
Cement Mortars ◽  
Oil Well Cement ◽  
Well Cement

This study was conducted to assess the acceleration of strength development by CO2 curing and to evaluate the strength and microstructure of two cement mortars. Three curing pressures (1, 5, 8 bars), three curing time (20, 120, 180 minutes) and four CO2 concentration (0%, 25%, 50% and 100%) were used in this investigation. Two mortar specimens are made with Type Ι Portland cement and oil-well cement. After the CO2 curing duration and demolding, the mortar samples were assessed through the mass gain, the compressive strength, the pressure drop, the temperature rise in the curing chamber, and the microstructure characteristics. The performance of the CO2 cured mortars was found through the measurement of pressure drop, temperature rise, strength development, mass gain and carbonation. In general, higher CO2 concentration, longer carbonation time, higher CO2 pressure could increase the compressive strength of the mortar and promote more CO2 absorption. The better results obtained from this study are the Type 1 cement mortars curing three hours under 5-bar pressure with 100% CO2 concentration using one-time supply method. The three-hour mortar samples had a high percent strength development. The increasing of CO2 concentration results in higher carbonation degree of mortar, more mass gain, and a stiffer and denser material.

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