34. Horizontal Drilling

8/18/2019 34. Horizontal Drilling

1/36

PETE 411 - Well Drilling34. Horizontal Drilling

PETE 411Well Drilling

Lesson 34

Horizontal Drilling


2/36


Horizontal Drilling

Why Drill Horizontal Wells?

Relative Production Rates

Relative Costs Types of Horizontal Wells

Drilling Problems & olutions

Ho! Popular is Horizontal Drilling?

"#amples


3/36



4/36



$ncrease Reserves

$ncrease Production Rates

Control Water Production

Control %as Production


5/36



Produce rom Thin Reservoirs

Connect 'ertical ractures

Produce (ethane from Coal eams

$ncrease $n)ectivity* +steam, !ater, polymers, etc-.

Control and Production


6/36



7/36



8/36



9/36



10/36



11/36


Production Ratesry! - "ustin #hal$

'ertical Horizontal Horizontal/'ertical Well Well Production Ratio 0/D 0/D

12 345 62

13 213 16

3 145 21


12/36


Production Rates

Drilled 5 !ells from 1789 to 1787-

Drilled : 83 !ells in 1774

'ertical Well Drilling Cost; 2


13/36


Drilling #osts"ustin #hal$ %1&&3'

'ertical !ell : =344,444

Recompletion as Horizontal Well : =e! Horizontal Well :=1,444,444*2,444,444

: =144/ft to=134/ft

@these numbers are rough estimates onlyA


14/36


Ros(o )are - *taly


15/36


Prudhoe +ay

'ertical Well;


16/36


Long Radius %,1-3 /t' 0,-2 deg1 /t

)ediu5 Radius %14,6 /t' 0,7-4 deg1 /t

8hort Radius %,-4 /t'

0,1.9-3 deg/t

:1 /t ,9 /t ,7 /t


17/36


;e< Drilling Technology

(easurement While Drilling +(WD.

Directional urverying and Control

$ndentification of (arBers +identify zones.

Top Drive

Drill !ith 74*ft stands instead of


18/36


;e< Drilling Technology

(ud (otors

Drill !ithout rotating pipe

Change hole direction !hiledrilling

teerable systems


19/36



20/36


Potential Pro=le5s in Horizontal

Drilling

Running euipment in and out of hole

drillstring, casing, cables

Preventing/Remedying differentialsticBing

"#cessive torue


21/36


Potential Pro=le5s in Horizontal

Drilling

Cleaning the hole and preventing cuttingsfrom settling along the hole bottom

Controlling !eight on bit to achieve andmaintain directional control

Cementing casing or liner


22/36


8u55ary

Horizontal !ells may produce at


23/36


8u55ary

The use of horizontal !ells has beengro!ing * !orld!ide-

Horizontal !ells has increased our

recoverable reserves-

$n the F-- one rig in ten is drillinghorizontal !ells- +1776. +1778.

Today : one rig in fifteen is drillinghorizontal !ells- +2441.


24/36



25/36



26/36


Long - Radius Wells

Fsed for achieving large horizontal

displacements from platforms or drilling pads

Fsed for achieving very long horizontal sections

+to 9,444 ft .

0uild Rate; : 2*9 degrees/144 ft

0uild Radius; : 1,444*


27/36


)ethod>

Fse conventional directional drillingtechnology

Fse rigid bottom hole assemblies,motors & bent subs, stabilizers

or Fse >avigation drilling systems !ithsteerableI drilling motors


28/36


)ediu5 - Radius Wells

0uild Rate; : 8 * 24 degrees/144 ft

+up to 64 deg/144 ft in some

cases.

0uild Radius; :


29/36


)ethod>

Fse modified long*radius drilling technology Fse different motors for "ngle +uild and

"ngle Hold sections-

Fse a Tangent 8ection@ bet!een the t!obuild sections

Fse compressive service drillpipe through

the curve if 0uild Rate J 13 deg-/144 ft-

+C drillpipe has integral !ear Bnotsevery : 14 ft.


30/36


8hort-Radius Wells

0uild Rate; : 1 * < degrees/ft

0uild Radius; : 24 * 64 ft

Gength of Horiz- ection; 244 * 1,444 ft


31/36


)ethod>

T!o do!nhole motor designs are available Drill vertical ratholeI to identify horizon

0uild angle !ith special curve*drilling

assembly !ith a non*rotating shell thatgives curvature to the tool

Kfter building angle to horizontal, use a

special angle*hold assembly; thisconsists of t!o undergauge stabilizersbehind the bit, and fle#ible drillpipe-


32/36



33/36


Horizontal Well Pair


34/36


Horizontal Well Pair


35/36


Aertical *nBection Wells and

Horizontal Production Well


36/36

Documents

34. Horizontal Drilling