# Reduced Emission Reduced Emission Completions in DJ Basin Completions in DJ Basin and Natural Buttes and Natural Buttes Producers Technology Transfer Workshop May 1, 2008 Rock Springs, Wyoming Producers Technology Transfer Workshop May 1, 2008 Rock Springs, Wyoming



# Topics of Discussion Topics of Discussion Anadarko’s areas of tight gas production Conventional completion emissions Reduced emission completions

 Best Management Practices “BMP”

 Breco skids 

## Environmental and economic benefit Future plans Anadarko’s areas of tight gas production Conventional completion emissions Reduced emission completions

 Best Management Practices “BMP”

 Breco skids 

## Environmental and economic benefit Future plans

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# Anadarko Anadarko ’ s Areas of Tight Gas Production s Areas of Tight Gas Production

Wyoming

Utah

Colorado Wamsutter Granger

Natural Buttes DJ Basin



# Conventional DJ Gas Well Completion Conventional DJ Gas Well Completion

Pressure test of well Perforation of well casing and cement in production zones Fracture of reservoir to enhance production

 Fracture media and proppant dependent on reservoir 

## Flow back well until well pressure safe to rig up

 Possibility of lasting weeks

 Gas vented to atmosphere 

## Run production tubing Connect to production equipment and gathering system Operate well Pressure test of well Perforation of well casing and cement in production zones Fracture of reservoir to enhance production

 Fracture media and proppant dependent on reservoir 

## Flow back well until well pressure safe to rig up

 Possibility of lasting weeks

 Gas vented to atmosphere 

## Run production tubing Connect to production equipment and gathering system Operate well



## 21998 

## Conventional DJ Completion CH Conventional DJ 4 

## Emissions Emissions

Year Wells Frac’d

281 1999 374 2000 387 2001 491 2002 538 2003 447 2004 379 2005 473 Average 421

1 Based on EPA STAR $3 gas Avg Vent Time Days

8 8 11 13 14 16 15 11 12 Estimated Gas Lost MMSCF

899.2 1196.8 1702.8 2553.2 3012.8 2860.8 2274.0 2081.2 2072.6 Revenue Lost 1 MM$ 2.7 3.6 5.1 7.7 9.0 8.6 6.8 6.2 6.2



# Reduced DJ Emission Completions Reduced DJ Emission Completions
Pressure test of well Perforation of well casing and cement in production zones Fracture of reservoir to enhance production

 Fracture media and proppant dependent on reservoir 

### Well flows back until gas cut Well shut-in and tied to production equipment

 Basin specific due to reservoi r and gathering system parameters 

### Flow back well to separation equipment until well pressure safe to rig up

 Possibility of lasting weeks

 Gas directed to sales

 Liquids collected in tank 

### Run production tubing Operate well Pressure test of well Perforation of well casing and cement in production zones Fracture of reservoir to enhance production

 Fracture media and proppant depende nt on reservoir 

### Well flows back until gas cut Well shut-in and tied to production equipment

 Basin specific due to reservoi r and gathering system parameters 

### Flow back well to separation equipment until well pressure safe to rig up

 Possibility of lasting weeks

 Gas directed to sales

 Liquids collected in tank 

### Run production tubing Operate well



## 3— 

## Reduced DJ Emission Completion CH 4 

## Emissions Emissions
Average Estimated Revenue Year Wells Frac’d Vent Time Gas Lost Lost 1 Days MMSCF M$ 2006 590 0.08 19.7 137.7 2007 636 0.08 21.2 148.4 2008 310 0.08 10.3 72.3 Average 2 613 0.08 20.5 143.1 1 Based on EPA STAR $7 gas 2 2006 and 2007



# Average DJ Economic Benefit Average DJ Economic Benefit

Completion Wells Frac’d

Method
Conventional 421 Green 613 Comparison +192 G vs. C Average Vent Time Days/well 12 0.08 Estimated Gas Vented

MMSCF 2072.6

20.5 -2052.1 Revenue Lost
$6.2 MM $143.1 M +$6.1 MM



## 4

## Natural Buttes Reduced Emission Completions Natural Buttes Reduced Emission Completions Began using Breco ski d late 2005 through 3 rd 

## quarter 2006 Designed internal system which is currently used Fracture materials separated from gas stream Gas stream directed to gathering system Began using Breco ski d late 2005 through 3 rd 

## quarter 2006 Designed internal system which is currently used Fracture materials separated from gas stream Gas stream directed to gathering system



# Natural Buttes Completion Benefit Natural Buttes Completion Benefit

Flow Time Through Wells Breco Completed Avg. hrs 138 80
1 Based on traded gas price Cumulative Gas
MMSCF

3.9 Breco Cost $ p/well $6,341 Gas Saved Revenue 1 $ p/well $25,710 Difference $ p/well $19,369



## 5

# Environmental Benefits Environmental Benefits Reduction of vented VOCs and HAPs Reduction of GHG compounds

 CH 4 

## 21 times more potent than CO 2 

## Possibility of recycling stimulation fluids Reduces combustion byproducts Reduction of vented VOCs and HAPs Reduction of GHG compounds

 CH 4 

## 21 times more potent than CO 2 

## Possibility of recycling stimulation fluids Reduces combustion byproducts

Reduced Emission Comp letion Restrictions letion Restrictions Methodology employed dependent on Methodology employed dependent on reservoir characteristics Areas where nitrogen or carbon dioxide are used to enhance fracture fluid Sales gas spec  ifications Sales gas specifications Flaring utilized  

## Gathering sy Gathering s stem pressure stem pressure Gas compression may be required 



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# Future Plans Future Plans Continue to utilize green completion practices Evaluate new green completion techniques and production methods practices and production methods



# Contact Information Contact Information

Korby Bracken, P.E. Anadarko Petroleum Corporation 1099 18 th 

## Street Denver, CO 80202 P: (720) 929-6623 E: Korby.Bracken@anadarko.com Korby Bracken, P.E. Anadarko Petroleum Corporation 1099 18 th 

## Street Denver, CO 80202 P: (720) 929-6623 E: Korby.Bracken@anadarko.com

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# Questions or Comments?

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