19. Kick Detection and Control - PETE 661 Drilling...

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A T M PETE 661 Drilling Engineering Lesson 19 Kick Detection and Control
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2 A T M Kick Detection and Control Primary and Secondary Well Control What Constitutes a Kick Why Kicks Occur Kick Detection Methods Kicks while Tripping
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3 A T M Kick Detection and Control Shut-in Procedures Soft Shut-in Hard Shut-in Water Hammer
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4 A T M Kick Detection and Control Read: ADE Ch. 6 Reference: Advanced Well Control Manual, SPE Textbook, ~2003. .. Homework # 11 - due November 25
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5 A T M Kick Detection and Control The focus of well control theory is to contain and manage formation pressure. Primary well control involves efforts at preventing formation fluid influx into the wellbore. Secondary well control involves detecting an influx and bringing it to the surface safely.
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6 A T M Kicks A kick may be defined as an unscheduled influx of formation fluids. Fluids produced during underbalanced drilling are not considered kicks Fluids produced during a DST are not considered kicks
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7 A T M Kicks For a kick to occur, we need: Wellbore pressure < pore pressure A reasonable level of permeability A fluid that can flow
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8 A T M Kicks Kicks may occur while: Drilling Tripping Making a connection Logging Running Casing Cementing N/U or N/D BOP, etc.
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9 A T M Causes of Kicks Insufficient wellbore fluid density Low drilling or completion fluid density Reducing MW too much Drilling into abnormally pressured formations Temperature expansion of fluid Excessive gas cutting
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10 A T M Causes of Kicks - cont’d Reduction of height of mud column Lost circulation because of excess static or dynamic wellbore pressure Fluid removal because of swabbing Tripping pipe without filling the hole
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11 A T M Causes of Kicks - cont’d Excessive swab friction pressure while moving pipe Wellbore collision between a drilling and producing well Cement hydration
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12 A T M Kick indicators Indicator Drilling break Increase in mud return rate Pit gain Flow w/ pumps off Significance Medium High High Definitive
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13 A T M Kick indicators Indicator Pump pressure decrease / rate increase Increase in drillstring weight Gas cutting or salinity change Significance Low Low Low
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14 A T M Kick Influx Rate This equation would rarely be strictly applicable in the event of a kick since fluid compressibility is not considered and transient relationships better describe influx flow behavior. ( 29 ( 29 radius wellbore r radius drainage r cosity influx vis wellbore at the pressure pore p radius drainage at the pressure pore p thickness, formation h ty permeabili formation k rate, flow influx q where ln w e w e = = = = = = = = - = μ w e w e r r p p kh q
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A T M Kick Influx Rate Extremely important to detect a kick early, to minimize its size. If a kick is suspected,
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This note was uploaded on 10/30/2011 for the course PETROLEUM 661 taught by Professor Dr.jeromej.schubert during the Fall '11 term at Texas A&M University-Galveston.

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19. Kick Detection and Control - PETE 661 Drilling...

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