Downhole Performance Evaluation of Blast Furnace Slag-Based Cements: Onshore and Offshore Field Applications

Leimkuhler, J.M.; Rainbow, F.H.K.; Warren, P.B.; Javanmardi, Kazem; Ladner, B.S.; Smith, T.

doi:10.2118/28474-ms

Cited by 8 publications

(3 citation statements)

References 5 publications

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“…This new technology, called "Slag-Mix" was developed by Shell Oil Co. in 1991 and has been used in more than 160 cementing operations, including primary cementing jobs, temporary abandonment plugs and sidetracking plugs. 3,4 Blast Furnace Slag is a non-metallic product, consisting essentially of calcium silicates and aluminosilicates and other bases that is formed in a molten state along with the iron in a blast furnace. 5 Blast Furnace Slag is discharged as a molten stream at a temperature usually between 2250 and 2900 o C. This mixture of molten oxides is then quenched in order to obtain a vitreous material.…”

Section: State Of the Artmentioning

confidence: 99%

“…In deepwater exploratory wells, the percentage of squeezes fell from 31 to 12% when using slurries made with Blast Furnace Slag. Wells cemented with the Slag-Mix technique showed improved leak-off test results, compared to conventional cementing operations 3 In spite of the recorded successes, there is an on-going debate about the development of micro-cracks in cured mudslag systems. However, this cracking has been linked to the drying-shrinkage of the slurry 7 .…”

Section: State Of the Artmentioning

confidence: 99%

See 1 more Smart Citation

Slag Cementing Versus Conventional Cementing: Comparative Bond Results

Silva¹,

Miranda²,

D'Almeida³

et al. 1997

Proceedings of Latin American and Caribbean Petroleum Engineering Conference

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractThe first publication on the use of slag as a material capable of substituting the traditional Portland cement in well cementing appeared in 1991, when it was seen that it could be added to drilling fluid and solidify it with some advantages over traditional methods.As a result, only recently, the use of this emerging technology has been suggested for situations where difficulty in removing the drilling fluid mud cake has been expected, as in HP/HT wells, for example. In this case, the practical rules for a successful cementing operation cannot always be implemented.As these high temperature wells are fundamental to the exploitation of important Brazilian fields, it was decided, as one of the strategies for overcoming the difficulties in obtaining good cementing results, to invest in evaluating the performance of the slag-mix technology.An extensive research project has therefore been conducted in a large-scale wellbore physical simulator, with the principal objectives of investigating the ease or difficulty of mixing the slag-mix and to evaluate the bond quality obtained after cementing and acidizing the well. Thus, the object of the present paper is to investigate the performance of slag-mix slurries under three distinct scenarios: cementing surface casing; cementing production casing at medium temperatures; and cementing production strings at high temperatures. The resistance of the set slurry to the attack of HCl / HF is measured in a physical simulator under static and dynamic conditions.

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Section: State Of the Artmentioning

confidence: 99%

Section: State Of the Artmentioning

confidence: 99%

Slag Cementing Versus Conventional Cementing: Comparative Bond Results

Silva¹,

Miranda²,

D'Almeida³

et al. 1997

Proceedings of Latin American and Caribbean Petroleum Engineering Conference

View full text Add to dashboard Cite

show abstract

“…Different forms of slag produced depend on cooling method used. It may be used as a mineral admixture for Portland cement concrete [13,14].…”

Section: -Introductionmentioning

confidence: 99%

Using of Steel Slag in Modification of Concrete Properties

J. Mohammed,

O.Abbas,

O.Abbas

2009

ETJ

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Steel slag which can be considered as solid waste pollutant was used in concrete mixture for road bases and surfaces, bridges, asphaltic concrete, clinker raw material and other fields, instead of cement or filling material.In this work, steel slag was used as replacement of aggregate or stone, which has the highest content in concrete mixture. Four groups of concrete mixtures with (0, 25, 50 and 60%) by wt. of steel slag from Basrah steel plant were used instead of aggregate.The first group, without slag, as a standard mixture was used to compare its properties with those of (25, 50 and 60%) by wt. steel slag. The obtained results showed that, density of concrete and compressive strength, also flexural force, after 7 days and 28 days were increased by increasing slag content, while water absorbed content was decreased by increasing slag content. Those results insure the importance of using steel slag not only in modification of concrete properties, but also to save the environment from huge quantities of slag as solid waste.

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Prehydrating High-strength Microspheres in Lightweight Cement Slurry Creates Value for Offshore Malaysian Operator

Abdullah¹,

Bedford²,

Wong

et al. 2013

SPE Asia Pacific Oil and Gas Conference and Exhibition

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Casing cementation across depleted reservoirs can be challenging because conventionally weighted cement slurries can induce losses and damage the permeability of formations caused by the higher associated hydrostatic pressure they exert on the wellbore. Therefore, when such pressure-related concerns exist, lighter-weight cement slurries are often preferred. For an offshore Malaysia operator, a lightweight cement slurry was proposed to reduce hydrostatic pressure and prevent losses and formation damage. However, instead of a water-extended lightweight cement slurry, a high-performance, lightweight (HPLW) cement slurry consisting of high-strength, hollow microspheres was designed. Special bulk blending and transportation are normally required for these HPLW slurries because of the large bulk volume and low specific gravity (SG) of high-strength, hollow microspheres. In this case, because of limitations related to the rig’s storage capacity, the microspheres could not be stored conventionally and used as a dry additive to the slurry during mixing. Instead, an alternative solution involving prehydrating the high-strength microspheres with liquid additives and mix water in the mixing pits was implemented. This paper discusses the procedures used during cementing operations and details the value of using this mixing method.

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Downhole Performance Evaluation of Blast Furnace Slag-Based Cements: Onshore and Offshore Field Applications

Cited by 8 publications

References 5 publications

Slag Cementing Versus Conventional Cementing: Comparative Bond Results

Slag Cementing Versus Conventional Cementing: Comparative Bond Results

Using of Steel Slag in Modification of Concrete Properties

Prehydrating High-strength Microspheres in Lightweight Cement Slurry Creates Value for Offshore Malaysian Operator

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