Lesson 5a Air, Gas, Mist calculations

Lesson 5a Air, Gas, Mist calculations - PETE 689...

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Unformatted text preview: PETE 689 Underbalanced Drilling (UBD) Lesson 5 Lesson 5 Air, Gas and Mist Drilling Read: UDM Chapter 2.1­2.4, Pages 2.1­2.74 Harold Vance Department of Petroleum Engineering Volume Requirements Volume Volume Requirements Volume Identify the geometry of the borehole Identify section(s) to be drilled with each of the techniques techniques Determine the geometry of the Determine associated drillstring sections to be drilled with each of the techniques drilled Estimate the anticipated drilling ROP in Estimate each section basded on the type of rock formation to be drilled formation Volume Requirements Volume Determine the elevation of the drilling site Determine above sea level, the temperature of the air during the drilling operation, and the approximate geothermal temperature gradieng approximate Decide whether direct or reverse circulation Decide techniques will be used techniques Calculate the minimum volume requirements to Calculate drill each section. (e.g. liquid flow rate, gas injection rate) injection Volume Requirements Volume Using the minimum volumetric flow rates, Using estimate the bottom-hole pressure, surface injection pressures, and compressor power compressor Predict the pressure underbalance at the Predict pay zone f the objective of using UBD is to minimize formation damage minimize Peform borehole stability analysis Volume Requirements Volume Select a contractor whose compressors Select will provide the drilling operation with the appropriate pressures and flow rates appropriate Estimate the approximate volume of fuel Estimate required by the compressors to drill the well. well. Example Problems Example Example 2.1 Example Example 2.1 Example Example 2.1 Example Example 2.1 Example Example 2.1 Example Example 2.1 Example Example 2.2 Example Example 2.2 Example Example 2.2 Example Example 2.2 Example Example 2.2 Example 2.7 Example 2.2 Example t is in Deg F Example 2.3 Example Example 2.3 Example Example 2.3 Example Example 2.3 Example Example 2.4 Example Example 2.4 Example Example 2.4 Example Example 2.4 Example Example 2.4 Example Example 2.7 – Vertical/Deviated/Slant Holes Vertical/Deviated/Slant Example 2.7 Example Example 2.7 Example Example 2.7 Example Example 2.7 Example Example 2.7 Example Example 2.7 Example Example 2.7 Example Example 2.7 Example Example 2.8 – Reverse Circulation Circulation Example 2.8 Example Example 2.8 Example Example 2.8 Example Example 2.8 Example Example 2.9 – Gas Volume Correlations Correlations Table 2.2 2.2 Example 2.9 Example Example 2.10 – Deviated Hole Example Table 2.3 Table Example 2.10 Example Example 2.10 Example ...
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This note was uploaded on 10/30/2011 for the course PETROLEUM 689 taught by Professor Jeromej.schubert during the Fall '11 term at Texas A&M University-Galveston.

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