Task 4 stimulation economics and pwri
This presentation is the property of its rightful owner.
Sponsored Links
1 / 22

Task 4: Stimulation Economics and PWRI PowerPoint PPT Presentation


  • 81 Views
  • Uploaded on
  • Presentation posted in: General

Task 4: Stimulation Economics and PWRI. TerraTek, Inc. Heriot -Watt University Triangle Engineering Duke Engineering and Services, Inc. eFirst Technologies Gas Research Institute Advantek, International, Inc VIPS. Issues. Confirm / Revise / Develop Technical Methods. ‘Other Company’

Download Presentation

Task 4: Stimulation Economics and PWRI

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Task 4 stimulation economics and pwri

Task 4: StimulationEconomics and PWRI

TerraTek, Inc.

Heriot -Watt University

Triangle Engineering

Duke Engineering and Services, Inc.

eFirst Technologies

Gas Research Institute

Advantek, International, Inc

VIPS


Task 4 stimulation economics and pwri

Issues

Confirm / Revise / Develop

Technical Methods

‘Other Company’

Contacts / knowledge

Experience

Database

Best

Practices

Software

Toolbox

PWRI

Data


Task 4 stimulation economics and pwri

PWRI and Economics

Data

Cost

Cost

Issues

Confirm / Revise / Develop

Technical Methods

‘Other Company’

Contacts / knowledge

Experience

Database

Best

Practices

Software

Toolbox

Cost

Cost


Task 4 stimulation economics and pwri

PWRI,Economics and Stimulation

Data

Cost vs Benefit

Risk

Issues

Confirm / Revise / Develop

Technical Methods

‘Other Company’

Contacts / knowledge

Experience

Database

Best

Practices

Software

Toolbox

Risk

Cost vs Benefit


Drivers for produced water re injection

Better Treatment

& surface disposal

Disposal

zone

SWI/AWI

(lowest cost

source of water)

Sub-surface

disposal

(injection)

Oil

zone

Reservoir Management:

- Pressure Maintenance

- Sweep

Water

injection

Drivers for Produced Water Re-Injection

WATER INJECTION

DRIVERS:

Options:

Purposes:

PWRI

PWRI DRIVERS:

- Need Additional Injection Water

- Environmental Issues

- Company Policy

- Legislation

- Other

Produced

water

disposal

Disposal

zone


Water injection

Water Injection

  • Lowest cost water source used early in project life

  • Produced Water becomes available later on

  • Additional surface facilities/equipment normally required for move to PWRI operation.

  • Opex e.g. pump maintenance will change

  • Facilities operation mode will be decided by cost/benefit analyses (e.g. commingled or separated injection)

  • Higher pressure pumps, new or converted wells may be required in order to re-inject increasing PW volumes

PWRI Economics - The Way Ahead

Next Presentation (Paul Van Den Hoek)


Pwri project decision tree

PWRI Project - Decision Tree

OK

Additional injection

wells required

(new/converted)

Cost

Injection Processin operation (SW/AW)

Yes

Yes

Enough Injection

Wells ?

Not yet

No

Conversion

/ Addition of surface facilities

PWRI

Required

(at later stage)?

Commingled

Water for

early injection?

Yes

Operation

mode(cost/benefitanalysis)

Yes

Cost

Sufficient pump capacity?

No

PW

available?

No

Higher

Pressure

pumps

Addition of PWRI System

Segregated

Cost

Cost


Water injection1

Water Injection

  • Lowest cost water source used early in project life

  • Produced Water becomes available later on

  • Additional surface facilities/equipment normally required for move to PWRI operation.

  • Opex e.g. pump maintenance will change

  • Facilities operation mode will be decided by cost/benefit analyses (e.g. commingled or separated injection)

  • Higher pressure pumps, new or converted wells may be required in order to re-inject increasing PW volumes

PWRI Economics - The Way Ahead

Next Presentation (Paul Van Den Hoek)


Pwri technical cost implications

PWRI - Technical & Cost Implications

  • Can we generate a “planning figure” for loss of injectivity due to conversion to PWRI (e.g. 20%)?

  • It depends on formation, thermal effects & water quality (oil/solids) e.g. PEA 23 equation

  • Risks e.g. what are the disposal alternatives of the produced water if injectivity is insufficient?


Pwri impact injectivity damage

PWRI - Impact Injectivity Damage

OK

No

Yes

On going

damage ?

No Damage

Good

Additional

water treatment

facilities

Cost

Intermittent?

Water

Quality?

Yes

No

Higher

Pressure

pumps

Cost

Injection

Loss fully

recovered ?

Poor

Damage?

Yes

Additional injection

wells

Cost

No

(Repetitive)

Chemical

Stimulation

Facility

Options

Cost

Net

Cost

Mechanical

Stimulation

Stimulation

Cost


Pwri technical cost implications1

3.Or facilities for better water quality from start? Costs?

2. Regular stimulation? Efficiency? Costs?

1.Accept lost injectivity?

(new wells? Costs?)

PWRI - Technical & Cost Implications

Injectivity

Time


Water management

Water Management

  • What is “value” of extra water injected

  • Water needs to become a tangible benefit in terms of pressure support / sweep rather than “just a cost”

  • Understand Interplay between water injectors and producers (also required for Intelligent Injectors)

  • Where can a limited amount of injection water be most beneficially used

    • (New) flowstream representation of reservoir simulation results (e.g. FLOWVIS from Geoquest) simplify this


What is lowest cost least risk option

What is lowest cost / least risk option?

  • Cost Example from data base (1):

    Corrosion Management

    • * Deferred oil


Cost example from data base 2

Cost Example from data base (2):

  • Bypass part of water treatment system?

    • Costs in Million $ / year

    • What happens during plant upset:


Pwri technical cost implications2

PWRI - Technical & Cost Implications

  • Option 1: Costs of Mitigation

    • Derive from Paul Van Den Hoek’s proposal for:PWRI Economics - the Way Ahead

  • Option 2: Stimulation treatments needed to restore injection

  • How do we define success?


Is stimulation the lowest cost option

Is stimulation the lowest cost option?

ELF PICTURE

  • Compare costs continuing damage & acid stimulation


Is stimulation the lowest cost option1

Is stimulation the lowest cost option?

ELF PICTURE

  • Include risk of “technical” failure!


Is stimulation the lowest cost option2

Is stimulation the lowest cost option?

ELF PICTURE

  • Compare costs continuing damage & acid stimulation


Pwri techno economic evaluation

PWRI - Techno / Economic Evaluation

  • How do we define success?

    • Qualitative view (Extremely / Yes / No)

    • Achieve short term injection target often critical

    • Recognise other well / injection system limitations

      (discounted stimulation index based on Hall plot?- see next slide)

    • Economics concentrate on “extra” water injected compared to “do-nothing base case”?(i.e. similar concept as used for evaluation of production well stimulation)


Stimulation economics the way ahead

Stimulation Economics - The Way Ahead

  • Prepare best practice using “Stimulation Index” based on “value” of discounted net extra water injected

  • Compare with cost of stimulation and other mitigation strategies

  • Include stimulation in any larger study (Use same methodology)

  • Request “typical” costs for “most complete” wells in database


Pwri technical cost implications3

Injectivity

Extra water injected

Time

PWRI - Technical & Cost Implications


Repetitive acidising of sandstones

Repetitive Acidising of Sandstones

  • Often shows decreasing success

  • Damage Location - Placement techniques

  • Stimulation fluid selection


  • Login