Characteristics of Oilwell Cement Slurry Using CMC

Roshan, Hamid; Asef, Mohammad Reza

doi:10.2118/114246-pa

Cited by 24 publications

(19 citation statements)

References 16 publications

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“…On the other hand, the gel strength of the cement slurries is high, which could be a problem at the time of pumping at the surface condition. The gel strength and viscosity of the slurries increases with increased concentration, which was due to the water absorption on its methoxyl group (Roshan & Asef, 2010). But the absorption of water and increase of viscosity keep the slurry stable at high temperature.…”

Section: Resultsmentioning

confidence: 99%

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Hydroxypropylmethylcellulose as a Primary Viscosifying Agent in Cement Slurry at High Temperature

Abbas¹,

Irawan²,

Memon³

et al. 2013

Int J Automot Mech Eng

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The use of polymer in cement slurry is necessary to retain viscosity at ambient temperature and thermal thickening properties with increasing temperature. Current polymers, polysaccharides and their derivatives are extensively studied. At high temperature these polymers do not yield thickening of viscosity, but exhibit loss of slurry and gas migration. Therefore, this study presents hydroxypropylmethylcellulose (HPMC) polymer as a viscosifying agent in cement slurry. The HPMC possesses a strong thermal thickening and solid suspension ability which means low viscosity at ambient temperature and viscosity increase with respect to temperature. Thus, a series of experiments was conducted on HPMC polymer as a viscosifying agent in cement slurry. Different concentrated solutions were prepared (i.e. 1.5 to 2.5 wt%), in order to characterize their viscosity with respect to shear rate and increasing temperature up to 100°C. Then, cement slurries were prepared with HPMC as the primary viscosifier, to determine the rheological properties at high temperatures. It was observed that HPMC polymer has increased viscosity from 90°C to 100°C. The improved rheology of cement slurry, in terms of plastic viscosity and yield point at different concentrations, revealed HPMC as a capable viscosifying agent at high temperature. Moreover, increased gel strength with increasing concentration was also observed, which may cause a higher pumping rate on the surface. It was concluded that HPMC polymer acts as a viscosifying agent at high temperature. HPMC-based slurries showed high rheology (plastic viscosity and yield point) with HPMC polymer. Thus, the use of this additional additive should be considered in the design of appropriate cement slurry.

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Section: Resultsmentioning

confidence: 99%

“…Cement has been used in drilling operations to restrict fluid movement between zones, protect casing from corrosion and closing abandoned portions of wells (Roshan & Asef, 2010). Additives and polymers have been used in oil well cementing to improve the properties of cement slurry.…”

Section: Introductionmentioning

confidence: 99%

Hydroxypropylmethylcellulose as a Primary Viscosifying Agent in Cement Slurry at High Temperature

Abbas¹,

Irawan²,

Memon³

et al. 2013

Int J Automot Mech Eng

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show abstract

“…These all cellulose-type polymers are used in different fields. Besides other applications, it has excellent usage in oil well cementing operations (Roshan and Asef 2010). Cement is the key material that has been used during drilling operation to provide zonal isolation, protect the casing string and provide the strength for installing wellhead (Pour and Moghadasi 2007).…”

Section: Introductionmentioning

confidence: 99%

Application of cellulose-based polymers in oil well cementing

Abbas

Irawan

Memon

et al. 2019

J Petrol Explor Prod Technol

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Cellulose-based polymers have been successfully used in many areas of petroleum engineering especially in enhanced oil recovery drilling fluid, fracturing and cementing. This paper presents the application of cellulose-based polymer in oil well cementing. These polymers work as multifunctional additive in cement slurry that reduce the quantity of additives and lessen the operational cost of cementing operation. The viscosity of cellulose polymers such as hydroxyethyl cellulose (HEC), carboxymethylcellulose (CMC) and hydroxypropyl methylcellulose (HPMC) has been determined at various temperatures to evaluate the thermal degradation. Moreover, polymers are incorporated in cement slurry to evaluate the properties and affect in cement slurry at 90 °C. The API properties like rheology, free water separation, fluid loss and compressive strength of slurries with and without polymer have been determined at 90 °C. The experimental results showed that the viscosity of HPMC polymer was enhanced at 90 °C than other cellulose-based polymers. The comparative and experimental analyses showed that the implementation of cellulose-based polymers improves the API properties of cement slurry at 90 °C. The increased viscosity of these polymers showed high rheology that was adjusted by adding dispersant which optimizes the rheology of slurry. Further, improved API properties, i.e., zero free water separation, none sedimentation, less than 50 ml/30 min fluid loss and high compressive strength, were obtained through HEC, CMC and HPMC polymer. It is concluded that cellulose-based polymers are efficient and effective in cement slurry that work as multifunctional additive and improve API properties and cement durability. The cellulose-based polymers work as multifunctional additive that reduces the quantity of other additives in cement slurry and ultimately reduces the operational cost of cementing operation. The comparative analysis of this study opens the window for petroleum industry for proper selection of cellulose-based polymer in designing of cement slurry.

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“…Common additives for oil and gas well cementing operations comprise, heavy weight materials (barite), accelerators (calcium chloride), retarders (lignosulfonates), extenders (bentonite), fluid loss control additives (polymers) and loss circulation additives (fibrous materials), dispersants, friction reducers etc. (Bermudez, 2007;Roshan and Asef, 2010;Shadizadeh et al, 2010).…”

Section: Introductionmentioning

confidence: 99%