Selecting perforation intervals and stimulation technique in the Khuff reservoir for improved and economic gas recovery

Rahim, Zillur; Al-Qahtani, Mohammed Y.

doi:10.1016/s0920-4105(02)00314-5

Cited by 3 publications

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“…These include heterogeneity of formation (Rahim and Al-Qahtani, 2003), acid returns (Taylor et al, 2000), leak-off (Charles and Xie, 1997;Gjønnes et al, 1998), etc. In this study, we focused on the leak-off control to improve the efficiency of acid fracturing.…”

Section: Development and Evaluation Of Chemicalsmentioning

confidence: 99%

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New formula for acid fracturing in low permeability gas reservoirs: Experimental study and field application

Zhou¹,

Wang²,

Zhao³

et al. 2007

Journal of Petroleum Science and Engineering

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Section: Development and Evaluation Of Chemicalsmentioning

confidence: 99%

“…So, the longest and the most conductive fracture is generally developed and propagated in such high permeability sections. The low permeability zones may not get necessary treatments if these intervals are perforated and treated simultaneously as pointed out by Rahim and Al-Qahtani (2003).…”

Section: Introductionmentioning

confidence: 99%

New formula for acid fracturing in low permeability gas reservoirs: Experimental study and field application

Zhou¹,

Wang²,

Zhao³

et al. 2007

Journal of Petroleum Science and Engineering

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Evaluation of developing an enhanced geothermal heating system in northeast China: Field hydraulic stimulation and heat production forecast

Zhang

Guo

et al. 2015

Energy and Buildings

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Commingled Production Experiences of Multilayered Gas-Carbonate Reservoir in Saudi Arabia

et al. 2005

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Saudi Aramco employed extensive matrix and acid fracturing treatments in thedevelopment of Saudi Arabian non-associated gas carbonate reservoirs.Thetarget reservoir is the Permian Khuff Formation which is the majornon-associated gas reservoir in the prominent Ghawar Field, eastern SaudiArabia.The Khuff reservoir is stratigraphically divided into fourcorrelative zones, namely Khuff-A, B, C, and D in downwardsequence.Khuff-B and C are the two major reservoirs with distinctivehydraulic characteristics. Khuff-A and D zones mostly are either discontinuousor have poor to non reservoir quality. Saudi Aramco is pursuing commingled production selectively as a part of thegas development plan to extend the well's economic life and to meet its growingdomestic gas needs. Since the Khuff-C has better reservoir quality with larger gas reserves, itwas completed by itself during the initial period of the fielddevelopment. Later, the commingled production by adding the Khuff-A and Bhas become part of the overall strategy to offset the natural decline fromKhuff-C and maximize gas production and extend the wells' life. This paper will review the acid fracturing and stimulation practicesemployed by Saudi Aramco in the Khuff-Carbonates. The criteria used to selectsuitable candidates for the commingled production and techniques employed toquantify flow contributions from each individual zone after commingling theproduction will be reviewed. The production performance, lessons learned, business impact and the way forward will be discussed. Introduction Since 1995, Saudi Aramco has embarked on an aggressive non-associated gasreserve development program and gas expansion projects.These projectsencompass the drilling of new wells and developing new reservoirs wherevercommercial gas reserves can be found. Developing the Permian Khuff-Carbonate reservoirs in the prominent GhawarField, eastern Saudi Arabia (Fig. 1) is in the center of this ambitious programto address the ever- increasing domestic energy requirement. Saudi Aramco employed extensively acid fracturing and high rate matrixacidizing stimulations to exploit the Khuff gas reserves. More than 200 Khuffgas wells hydraulic fracturing stimulations have been successfullyemployed. Saudi Aramco is pursuing commingled production selectively as a part of thegas development plan.Through case history examples, this paper will shedlight on the deployed stimulation practices, commingled production results, lessons learned, and business impact.

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Selecting perforation intervals and stimulation technique in the Khuff reservoir for improved and economic gas recovery

Cited by 3 publications

References 3 publications

New formula for acid fracturing in low permeability gas reservoirs: Experimental study and field application

New formula for acid fracturing in low permeability gas reservoirs: Experimental study and field application

Evaluation of developing an enhanced geothermal heating system in northeast China: Field hydraulic stimulation and heat production forecast

Commingled Production Experiences of Multilayered Gas-Carbonate Reservoir in Saudi Arabia

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