Effect of replacement of silica flour with silica fume on engineering properties of oilwell cements at normal and elevated temperatures and pressures

Grabowski, E. F.; Gillott, J. E.

doi:10.1016/0008-8846(89)90023-9

Cited by 39 publications

(12 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3), further improving the strength that attains a maximum value of 42 MPa. These results are in good agreement with Grabowski and Gillott 28 who studied similar cement slurries. On the other hand, the addition of small amounts of alumina (10%–15%) to the system only slightly improves the strength.…”

Section: Resultssupporting

confidence: 91%

Relationship Between Engineering Properties, Mineralogy, and Microstructure in Cement‐Based Hydroceramic Materials Cured at 200°–350°C

Kyritsis

Bentz

Meller

et al. 2009

Journal of the American Ceramic Society

View full text Add to dashboard Cite

Cement‐based materials used to seal geothermal or deep oil wells are exposed to severe conditions. Optimizing engineering properties such as strength and permeability is therefore very important. We have synthesized hydroceramic materials for such applications based on the CaO−Al2O3−SiO2−H2O (CASH) system and cured them over a range of temperatures (200°–350°C). Depending on initial composition and curing temperature, hydroceramics of complex and diverse mineralogy and microstructure are formed. The minerals found include portlandite, jaffeite, xonotlite, gyrolite, 11 Å tobermorite, truscottite, hydrogarnet, and calcium aluminum silicate hydrate. These cement‐based hydroceramic materials develop complicated pore structures, which strongly affect bulk properties. We report the compressive strength and permeability of these materials and show how these bulk engineering properties are related to microstructure. The compressive strength was found to be in the range 2–52 MPa and the intrinsic permeability in the range 0.5 × 10−17 to 3300 × 10−17 m2. Scanning electron microscopy (SEM) was used for imaging the hydroceramic microstructures. Further, we have computed the intrinsic permeability from 2‐D SEM images by using the Stokes equation solver, Permsolver, applied to reconstructed 3‐D images and the results are shown to be in good agreement with experimentally determined values.

show abstract

Section: Resultssupporting

confidence: 91%

Relationship Between Engineering Properties, Mineralogy, and Microstructure in Cement‐Based Hydroceramic Materials Cured at 200°–350°C

Kyritsis

Bentz

Meller

et al. 2009

Journal of the American Ceramic Society

View full text Add to dashboard Cite

show abstract

“…The primary formed C-S-H gel converts to crystalline alpha dicalcium silicate hydrate (a-C 2 SH) or C 3 SH 1.5 (Jupe et al 2008;Mindess et al 1981;Taylor 1997). These phases are porous and weak, which leads to a deterioration in the compressive strength and concrete durability (Eilers et al 1983;Grabowski and Gillott 1989). To avoid the formation of undesired phases (a-C 2 SH and C 3 SH 1.5 ), fine siliceous material should be added at 30-40 % by weight of the cement.…”

Section: Introductionmentioning

confidence: 99%

“…The hydration product features of autoclaved mixtures depend on many parameters, including the curing conditions, calcium to silica ratio (Ca/Si), and type of added silica (Bresson et al 2002;Eilers et al 1983;Hope 1981;Kołakowski et al 1994). It has been stated that, under autoclave conditions, the use of crystalline silica produces high strength compared to the use of amorphous silica (Assarsson and Rydberg1956;Grabowski and Gillott 1989;Jupe et al 2008;Luke 2004;Sanders and Smothers 1957;Yazici 2007). Additionally, it has been demonstrated that, at each autoclaving temperature, there is an optimum period of curing that results in good mechanical and physical properties (Hanson 1963;Menzel 1934;Neville 1973;Shi and Hu 2003;Yazıcı et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Effect of Autoclave Curing on the Microstructure of Blended Cement Mixture Incorporating Ground Dune Sand and Ground Granulated Blast Furnace Slag

Alawad

Alhozaimy

Jaafar

et al. 2015

International Journal of Concrete Structures and Materials

View full text Add to dashboard Cite

Investigating the microstructure of hardened cement mixtures with the aid of advanced technology will help the concrete industry to develop appropriate binders for durable building materials. In this paper, morphological, mineralogical and thermogravimetric analyses of autoclave-cured mixtures incorporating ground dune sand and ground granulated blast furnace slag as partial cementing materials were investigated. The microstructure analyses of hydrated products were conducted using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), differential thermal analysis (DTA), thermo-graphic analysis (TGA) and X-ray diffraction (XRD). The SEM and EDX results demonstrated the formation of thin plate-like calcium silicate hydrate plates and a compacted microstructure. The DTA and TGA analyses revealed that the calcium hydroxide generated from the hydration binder materials was consumed during the secondary pozzolanic reaction. Residual crystalline silica was observed from the XRD analysis of all of the blended mixtures, indicating the presence of excess silica. A good correlation was observed between the compressive strength of the blended mixtures and the CaO/SiO 2 ratio of the binder materials.

show abstract

“…Substitution of silica flour with varying proportions of silica fume affects the strength and the permeability of hardened cements [27]. The positive effect on the strength regression at increased temperatures is due to a greater rate of carbonation of the set cement [28].…”

Section: Silica Flour and Silica Fumementioning

confidence: 99%

Cement additives

2015

Petroleum Engineer's Guide to Oil Field Chemicals and Fluids

View full text Add to dashboard Cite

The state of the art in cementing technology [1][2][3] and recent developments are sketched out in the literature [4,5]. A discussion about the details of special cement formulations can be found in several monographs [6,7].The movement of gas from the subterranean zone through the cement slurry during and after primary cementing is addressed to as gas migration. Gas migration can cause severe problems, for example, high volume loss of gas from a high pressure zone to a low pressure zone and the failure of the cement to seal the annulus.Gas migration is caused by the behavior of the cement slurry during a transition phase in which the cement slurry changes from a true hydraulic fluid to a highly viscous mass showing some solid characteristics. When first placed in the annulus, the cement slurry acts as a true liquid and thus transmits hydrostatic pressure. During the transition phase, the cement slurry may lose its ability to transmit the hydrostatic pressure. The reasons for this behavior may be [8]:• loss of fluid from the slurry to the subterranean zone; • development of static gel strength, that is, stiffness in the slurry.Petroleum Engineer's Guide to Oil Field Chemicals and Fluids. http://dx.

show abstract

Effect of replacement of silica flour with silica fume on engineering properties of oilwell cements at normal and elevated temperatures and pressures

Cited by 39 publications

References 8 publications

Relationship Between Engineering Properties, Mineralogy, and Microstructure in Cement‐Based Hydroceramic Materials Cured at 200°–350°C

Relationship Between Engineering Properties, Mineralogy, and Microstructure in Cement‐Based Hydroceramic Materials Cured at 200°–350°C

Effect of Autoclave Curing on the Microstructure of Blended Cement Mixture Incorporating Ground Dune Sand and Ground Granulated Blast Furnace Slag

Cement additives

Contact Info

Product

Resources

About