SPE International Symposium and Exhibition on Formation Damage Control 2014
DOI: 10.2118/168136-ms
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Using Water to Control Water in Underbalanced Drilling With Nitrogen

Abstract: Underbalanced drilling (UBD) has been recognized as an effective technique for reducing formation damage and finding new discoveries of oil and gas reserves in Southwestern China. However, the excess production of formation water in UBD has hindered the application of this technology in several other regions. The rate of formation water production increases with the gas injection rate that decreases bottom hole pressure. Adding water to the injected nitrogen stream can moderate bottom hole pressure and thus mi… Show more

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Cited by 2 publications
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“…UBD began in the 1930s and developed rapidly in the recent years [3], because of its great advantages [4] in improving rate of penetration (ROP), discovering reservoirs, and reducing reservoir damage. When a reservoir is opened, formation fluid will enter the wellbore under the action of negative pressure difference, which will lead to changes in annulus pressure, flow rate, and other parameters [5,6]. Because of the coupling effect between the wellbore and formation, reservoir characteristics such as reservoir pressure and permeability may be obtained by using measured data acquired during drilling operation, such as bottomhole pressure, flow rate, and injection rate.…”
Section: Introductionmentioning
confidence: 99%
“…UBD began in the 1930s and developed rapidly in the recent years [3], because of its great advantages [4] in improving rate of penetration (ROP), discovering reservoirs, and reducing reservoir damage. When a reservoir is opened, formation fluid will enter the wellbore under the action of negative pressure difference, which will lead to changes in annulus pressure, flow rate, and other parameters [5,6]. Because of the coupling effect between the wellbore and formation, reservoir characteristics such as reservoir pressure and permeability may be obtained by using measured data acquired during drilling operation, such as bottomhole pressure, flow rate, and injection rate.…”
Section: Introductionmentioning
confidence: 99%