20. Horizontal Wells - TAMU - Pemex Offshore Drilling...

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1 TAMU - Pemex Offshore Drilling Lesson 20 Horizontal Wells
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2 Lesson 20: Horizontal Wells Why Drill Horizontal Wells? Relative Production Rates Relative Costs Types of Horizontal Wells Drilling Problems and Solutions How Popular is Horizontal Drilling?
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3 Not to scale Austin Chalk Oil Rig Austin Chalk Pearsall Field Austin San Antonio
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4 WHY DRILL HORIZONTAL WELLS? Increase Production Rates Control Water Production Control Gas Production Control Sand Production Increase Reserves
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5 WHY DRILL HORIZONTAL WELLS? Produce From Thin Reservoirs Connect Vertical Fractures Produce Methane from Coal Seams Increase Injectivity (steam, water, polymers, etc.)
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6 Horizontal Well Length, 100 ft increments Horizontal Well Drainage Area = vertical drainage area Production, Horizontal Well / Vertical Well 9 8 7 6 5 4 3 2 1 0 1 2 3 4 5 6 7 8 9 10 11 12 = 30 acres *Steady State
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7 Vertical Well Horizontal Well
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8 Austin Chalk Bryan Houston San Antonio Pearsall Field Austin Chalk Fields Austin Giddings Horizontal Drilling Sites
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9 Horizontal Drilling Horizontal wells are often drilled perpendicular to vertical fractures in order to intersect and drain as many fractures as possible. Horizontal drilling greatly reduces the risk of bypassing vertically fractured reservoirs.
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10 Horizontal Drilling Oil-filled fractures
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PRODUCTION RATES: ORYX - Austin Chalk Vertical Well B/D Horizontal Well B/D Horizontal/ Vertical Ratio
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20. Horizontal Wells - TAMU - Pemex Offshore Drilling...

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