new oil and gas drilling and production technologies
DESCRIPTION
New Oil and Gas Drilling and Production Technologies. Radius Energy, LLC. May, 2013. Growth in Horizontal Drilling in Recent Years . Horizontal Wells . Horizontal wells are often better suited for developing layered , tabular deposits (resource plays) such as coalbed methane and shale - PowerPoint PPT PresentationTRANSCRIPT
1
New Oil and Gas Drilling and Production Technologies
Radius Energy, LLC
May, 2013
2
Growth in Horizontal Drilling in Recent Years
Jan-0
3
May-03
Aug-03
Nov-03
Feb-04
Jun-0
4
Sep-04
Dec-04
Mar-05
Jul-0
5
Oct-05
Jan-0
6
Apr-06
Jul-0
6
Nov-06
Feb-07
May-07
Aug-07
Nov-07
Mar-08
Jun-0
8
Sep-08
Dec-08
Apr-09
Jul-0
9
Oct-09
Jan-1
0
Apr-10
Aug-10
Nov-10
Feb-11
May-11
Sep-11
0%
10%
20%
30%
40%
50%
60%
70%
80%
Horizontal / Directional Drilling
Vertical Drilling
Source: Baker Hughes North American Land Rig Count
3
Horizontal Wells
Horizontal wells are often better suited for developing layered , tabular deposits (resource plays) such as coalbed methane and shale
Now well established, this process provides a lower cost resource development process .
…………… But………….
Horizontal wells still often present unique drilling and production related problems.
New technology may be available to further reduce the cost of drilling and producing horizontal wells.
4
PROBLEM 1 - Vertical wells have sump (“rat hole”) to place pump
• Liquid separates in vertical section; falls to sump
• Sump is below producing formations; No fluid head pressure to hinder production
Liquid falls into Sump (“Rat-Hole”)
Gravity Separation:Gas rises to surface
5
BUT - Horizontal wells have no rat hole – Pump must be placed directly in production stream
• Any gas production causes interference with pump’s ability to pump liquid
• Inefficient pumping causes liquid level to build; High bottom-hole pressure hinders production
Gas Interference
Pump is unable to “pump” gas – Fluid level raises
6
SOLUTION: Selective create a seal below
the pump to temporally form an isolated pumping chamber :
1) Form seal2) Pump liquid3) Release Seal
Normal Operation:Sealing Device OPENPump OFF
Pumping Cycle:Sealing Device: CLOSEDPump ON
Sealing Device: OPEN
Sealing Device: CLOSED
7
PROBLEM 2 – Electric pump cable can become damaged when being installed in deviated well
Electric Submersible Pump (ESP)
Electric Cable exposed to damage
8
SOLUTION: Use “Wet Connect” to install
pump cable inside of discharge tubing after pump is in place.
Pump-down plug pulls cable into tubing – even into horizontal sections
9
PROBLEM 3 – Solids may settle along bottom of horizontal well – Blocking flow or inlet to pump
Solids settle along bottom of well, blocking flow and inlet to the pump
10
SOLUTION: Slowly rotate tubing with
eccentric tail joint to keep solids agitated and in suspension. Suspended solids removed from well along with other production liquids.
Helically shaped tail-joint “wipes” the circumference of well bore to agitate solids
11
SUMMARY -
A number of new technologies can be applied to aid in the deliquification of horizontal wells. Gas interference can be eliminated by cycling the pumping and gas producing periods. A number of tools and methods can be used to isolate the pump from the flow of gas. By setting the frequency of the pumping cycle to a relatively short interval of time, there is little effect to the performance of the well.
For more information, please contact:
Joseph A. Zupanick, PERadius Energy Services, LLC
(304) [email protected]