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Water and gas coning/cresting---a technology overview. A.K. Singhal. J. Can. Petrol. Technol., June 1996, 35(6), 56--62.

Fundamental problems with conventional wells are classified as sustaining oil rates at economic levels and handling/disposal of the effluent. Coning is explained and typical effects are described and illustrated. Oilfield practices used in coning situations are reviewed. Four promising techniques for mitigating the effects of coning/cresting are discussed. However, coning investigation technology is likely to be pool specific because diverse hydrodynamics, temperatures, and chemical environments will be encountered in different reservoirs. Suggestions involving restriction of the advance of water/gas, modifying flow distribution and sub-surface separation, and disposal of the produced water are discussed. 26 refs.

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