Smart Cement Modified by Adding Multi Nano Powder for Oil Well Applications

2020 ◽  
Vol 398 ◽  
pp. 8-15
Author(s):  
Doaa M. Abdullah ◽  
Alaa A. Abdul-Hamead ◽  
Farhad M. Othman
Keyword(s):  
Compressive Strength ◽  
Free Water ◽  
Partial Replacement ◽  
Oil Well ◽  
Weight Percentage ◽  
Nano Powder ◽  
Water To Cement Ratio ◽  
Oil Well Cement ◽  
Well Cement ◽  
Calcium Silicate Hydration

In this Research, a ball mill procedure was used to prepare a nanopowder from a cement dust material supplied by Cement Factory for reinforcing the oil well cement through using it as a partial replacement of oil well cement class G by a weight percentage of (0.25 to 1%) and nanorod ZnO with the same percentages. The mix with a water to cement ratio was kept at 0.44. Characterizations of the structured prepared samples were done, density and compressive strength and free water. Experimental outcomes display that the generated nanopowder have a particle size of (100 nm) and that the structural properties improved significantly with the development phase of calcium silicate hydration C-S-H. Density and compressive strength significantly improved with lower free water. That makes it proper as smart cement for the oil well applications.

Preliminary Investigation on G Cement Modified by Nano-Powder

2020 ◽  
Vol 38 (2A) ◽  
pp. 143-151
Author(s):  
Doaa M. Abdullah ◽  
Alaa A. Abdullalhameed ◽  
Farhad M. Othman
Keyword(s):  
Compressive Strength ◽  
Structural Characteristics ◽  
Preliminary Investigation ◽  
Partial Replacement ◽  
Oil Well ◽  
X Ray Diffraction ◽  
Nano Powder ◽  
Atomic Force ◽  
Oil Well Cement ◽  
Well Cement

A proper slurry design is critical to cementing work success. In the present investigation, a ball mill method was utilized for preparing a nano powder from a cement dust material, supplied via Al-Kufa Cement Factory, to reinforce the oil well cement by utilizing it as a partial replacement of oil well cement class (G) using different weight percentages (0.25%, 0.5%, 0.75% and 1%). A mixture having water to cement ratio of (0.44) was produced. The produced samples characterizations were achieved via the Atomic Force Microscope (AFM), the X-Ray Diffraction (XRD) as well as the density and compressive strength. Results showed that the structural characteristics were enhanced with the phase formation of the calcium silicate hydration (C-S-H), and both density and compressive strength were improved. Accordingly, obtained results suggest that the modified cement is suitable for the oil well uses.

Carbon Dioxide Corrosion and Corrosion Prevention of Oil Well Cement Paste Matrix in Deep Wells

2014 ◽  
Vol 692 ◽  
pp. 433-438 ◽  
Author(s):  
Jing Fu Zhang ◽  
Jin Long Yang ◽  
Kai Liu ◽  
Bo Wang ◽  
Rui Xue Hou
Keyword(s):  
Carbon Dioxide ◽  
Compressive Strength ◽  
Cement Paste ◽  
Oil Wells ◽  
Oil Well ◽  
Cement Slurry ◽  
Corrosion Prevention ◽  
Oil Well Cement ◽  
Oil Well Cement Paste ◽  
Well Cement

Carbon dioxide CO2could corrode the oil well cement paste matrix under agreeable moisture and pressure condition in deep oil wells, which could decrease the compressive strength and damage the annular seal reliability of cement paste matrix. The problem of oil well cement paste matrix corrosion by CO2was researched in the paper for obtain the feasible corrosion prevention technical measures. The microstructure and compressive strength of corroded cement paste matrix were examined by scanning electron microscopeSEMand strength test instrument etc. under different corrosion conditions. The mechanism and effect law of corrosion on oil well cement paste matrix by CO2were analyzed. And the suitable method to protect CO2corrosion in deep oil wells was explored. The results show that the corrosion mechanism of cement paste matrix by CO2was that the wetting phase CO2could generate chemical reaction with original hydration products produced from cement hydration, which CaCO3were developed and the original composition and microstructure of cement paste matrix were destroyed. The compressive strength of corrosion cement paste matrix always was lower than that of un-corrosion cement paste matrix. The compressive strength of corrosion cement paste matrix decreased with increase of curing temperature and differential pressure. The corroded degree of cement paste matrix was intimately related with the compositions of cement slurry. Developing and design anti-corrosive cement slurry should base on effectively improving the compact degree and original strength of cement paste matrix. The compounding additive R designed in the paper could effectively improve the anti-corrosive ability of cement slurry.

scholarly journals Improving the Iraqi Oil Well Cement Properties Using Barolift: an Experimental Investigation

2021 ◽  
pp. 147-156
Author(s):  
Ali M. Hadi ◽  
Ayad A. Al-Haleem
Keyword(s):  
Compressive Strength ◽  
Oil And Gas ◽  
Free Water ◽  
American Petroleum Institute ◽  
Oil Well ◽  
Cement Slurry ◽  
X Ray ◽  
Gas Drilling ◽  
Drilling Operations ◽  
Well Cement

Cement is a major component in oil and gas drilling operations that is used to maintain the integrity of boreholes by preventing the movement of formation fluids through the annular space and outside the casing. In 2019, Iraq National Oil Company ordered all international oil and gas companies which are working in Iraq to use Iraqi cement (made in Iraq) in all Iraqi oil fields; however, the X-ray fluorescence (XRF) and compressive strength results in this study show that this cement is not matching with American Petroleum Institute (API) standards. During this study, barolift was used to improve the properties of Iraqi cement used in oil wells at high pressure and high temperature (HPHT). Barolift (1 g) was added to cement admixture to evaluate its influence on improving the performance of cement, mainly related to the property of toughness.  Primarily, the quality and quantity of cement contents were determined using X-ray fluorescence. Experiments were conducted to examine the characteristics of the base cement and the cement system containing 1g of barolift, such as thickening time, free water, compressive strength, and porosity. X-ray diffraction (XRD), scanning electron microscope (SEM), and energy dispersive X-ray spectroscopy (EDS) were conducted for analyzing the microstructure of cement powder. The experimental results showed that barolift acted as a retarder and improved the thickening time, slightly increased the free water, enhanced the mechanical properties, reduced the porosity, and aided in scheming new cement slurry to withstand the HPHT conditions. Microstructure analysis showed that barolift particles blocked the capillaries by filling cement spaces and, thus, a denser and stricter cement network was achieved.

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).

Green Nanoparticle Oil Well Cement from Agro Waste Rice Husk Ash

2014 ◽  
Vol 974 ◽  
pp. 26-32
Author(s):  
N. Alias ◽  
M.M.M. Nawang ◽  
N.A. Ghazali ◽  
T.A.T. Mohd ◽  
S.F.A. Manaf ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Rice Husk ◽  
Oil And Gas ◽  
Rice Husk Ash ◽  
Hydraulic Pressure ◽  
Oil Well ◽  
Potential Candidate ◽  
Well Completion ◽  
Oil Well Cement ◽  
Well Cement

Cement is an important part in oil and gas well completion. A high quality of cement is required to seal hydraulic pressure between casing and borehole formation. Cement additives were used to enhance the cement properties such as thickening time, compressive strength, porosity and permeability of the cement. Currently, the commercial additives were imported and the price is keep increasing year by year. Therefore, the researchers were continuously looking for potential additives such as nanoparticle to improve the cement properties. This paper presents the effect nanosilica on compressive strength and porosity of oil well cement type G. In this study, two type of nanosilica were used, synthesis nanosilica from rice husk ash (RHA) and commercial nanosilica. The synthesized nanosilica was characterized using fourier transform infrared spectroscopy (FTIR), X-ray flouresece (XRF) and Field Emission Scanning Electron Microscopy (FESEM). All the experiments were conducted using API standard procedures and specifications. Based on the results, compressive strength of cement slurries was improved from 2600 psi to 2800 psi for 8-hours curing, when the amount of nanosilica increased from 0 wt% to 1.5 wt%. Besides that, incorporation of nanosilica from RHA into cement formulation resulted in reduction of cement porosity up to 18 % pore volume. Overall, the results showed that the incorporation of nanosilica from RHA improved the oil well cement compressive strength and oil well cement porosity. In conclusion, green nanosilica from RHA can be a potential candidate to replace the commercial nanosilica to enhance the oil well cement properties as well as to prevent the migration of undesirable fluid which can lead to major blowout.

Compressive Strength Changing Law of Oil Well Cement Paste under Corporate Corrosion of HCO3- and SO42-

2012 ◽  
Vol 229-231 ◽  
pp. 95-99 ◽  
Author(s):  
Yu Wang ◽  
Yu Feng Chen ◽  
Yan Lu ◽  
Hui Fang Zhang ◽  
Zhi Guo Sun
Keyword(s):  
Compressive Strength ◽  
Influence Factors ◽  
Ion Concentration ◽  
Solution Temperature ◽  
Cement Stone ◽  
Corrosion Mechanism ◽  
Oil Well ◽  
Experimental Conditions ◽  
Oil Well Cement ◽  
Well Cement

On the basis of analyzing the oil well cement corrosion mechanism by SO42- and HCO3-, the corrosion products, microstructure and compressive strength of cement stone were measured and the changing regularity and influence factors of compressive strength were analyzed under different experimental conditions. The following conclusions can be drawn. Under the interactive corrosion effect of SO42- and HCO3-, Ca(OH)2 in cement stone was dissolved out and consumed, the calcium silicate hydrate was decomposed, ettringite, gypsum, calcite and thaumasite were produced which destroyed the structure and components of cement stone primary products and led the compressive strength of corrosion cement stone decline. With the increases of ion concentration of corrosive solution, temperature and corrosive time, the compressive strength was decreased gradually, even collapsed completely.

Hydroxypropylmethylcellulose as a Free Water and Settling Control Agent in Oil Well Cement Slurry

ICIPEG 2014 ◽  
2015 ◽  
pp. 121-128 ◽  
Author(s):  
Ghulam Abbas ◽  
Sonny Irawan ◽  
Muhammad Khan Memon ◽  
Shuaib Ahmed Kalwar ◽  
Sandeep Kumar
Keyword(s):  
Free Water ◽  
Control Agent ◽  
Oil Well ◽  
Cement Slurry ◽  
Oil Well Cement ◽  
Well Cement

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%.

Research on Produced Fluid Corrosion Resistance Oil Well Cement Paste System in Adjustment Well

2016 ◽  
Vol 847 ◽  
pp. 451-455
Author(s):  
Jing Fu Zhang ◽  
Jun Dong Chen ◽  
Yu Wang ◽  
Ying Bo Lv
Keyword(s):  
Compressive Strength ◽  
Corrosion Resistance ◽  
Cement Paste ◽  
Oil Recovery ◽  
Oil Well ◽  
Laboratory Equipment ◽  
Oil Well Cement ◽  
Oil Well Cement Paste ◽  
Well Cement ◽  
Corrosion Time

To design oil well cement paste system and ensure well cementation quality of adjustment well in work area of tertiary oil recovery (EOR), the composition, microstructure and strength of cement paste matrix eroded by producing water were tested and studied by HTHP Curing Chamber, HTHP corrosion tester, X-ray diffraction, scanning electron microscope (SEM), universal testing compressor and some other laboratory equipment according to the condition that producing water contains sulfate (SO42-) and bicarbonate (HCO3-). The corrosion law and mechanism of oil well cement paste matrix were analyzed. The problem for designing corrosion resistance oil well cement paste system was investigated. The corrosion law and mechanism of oil well cement paste matrix by SO42- and HCO3- were raised. The corrosion resistant oil well cement paste system was designed, which was suitable to the adjustment well in area of EOR in Daqing. The results show that the compositions of cement paste matrix changed after corrosion by SO42- and HCO3- for a long term. The secondary gypsum, ettringite and calcite were produced, which changed the microstructures and declined the compressive strength of cement paste matrix. The change degree of compressive strength of cement paste matrix was affected by corrosion media concentration, corrosion time and other conditions. The higher concentration of corrosion media and the longer of corrosion time were, the greater decline of cement strength occurred. The formula of corrosion resistance oil well cement paste system was designed, for which the high sulfate resistant cement as architectural substrate and the PZW as admixtures were used to improve the strength and penetration resistance ability of cement.

Sign in / Sign up

Export Citation Format

Share Document