Day 2 3 operational aspects quality control and safety matrix acidising

Day 3: Operational aspects 


Opera&onal considera&ons for a 
s&mula&on treatment 


Cement quality 


Pressure limita&ons 


S&mula&on opera&ons with 
 coiled tubing 


Pumprates and fracturing 


Perfora&ons 


Corrosion concerns 


Planning and scheduling 



Site Prepara&on ‐ Onshore 

!  Considerations 
!  Storage vessels for acids, solvents, etc. 
!  Low pressure suction lines and manifold 
!  Blending equipment for "on the fly" 
! 
! 
! 
! 

addition of additives, 
A number of high pressure pump units 
High pressure line to the well head. 
Adequate measurement and control 
equipment  
Waste disposal tank(s) or similar facilities 

!  Back‐up requirements 
!  10% excess tank and storage capacity, 
!  Minimal 50% back‐up on all pumps, 
!  50% back‐up on blenders and  
!  100% back‐up on instrumentation 


Lay‐out of equipment 
Prevailing wind direction
Surface facilities,
vent line, etc
Wellhead

Annulus

pressurizing
unit

Tool shed Chemical
storage

HP Pumps and manifold

Fluid
storage

Blending
High Pressure Area
to marked with e.g. red tape
Proppant
storage
Job control center
Rest area, toilets, muster point, etc.


Site prepara&on‐offshore 


Job execu&on 


Quality control 


Job Execu&on

 

Planning Guidelines for Matrix Treatments 
Time required for

1. Data gathering
(incl. lab tests)
2. Treatment design
3. Notification/
discussions with
contractor
4. Tendering
5. Arranging material
and equipment
6. Preparing well/
Logistics
7. Job execution
8. Back-production/
measuring results
9. Evaluation

Explor. well
(one-off job)

Development
well

Well in mature
area (Campaign)

1 - 2 days

1 - 5 weeks

1 day

1 day
1 day

1 - 2 days
1 - 2 weeks

0.5 days
1 day

1 - 2 days
1 - 2 days

1 - 2 weeks
2 - 3 days

0.5 days
1 day

0.5 days

1 week

1 day

1 day
1 - 3 days

1 day
1 - 3 days

1 day
1 - 8 weeks

1 day

1 week

1 - 2 months


Health, Safety & Environment 
Considera&ons 
!  Design the treatment with the smallest possible environmental impact 
!  Apply treatment procedures with the smallest environmental impact whenever 
! 
! 
! 
! 

possible 
Make sure that for each chemical used a SHOC card or a Material Safety Data Sheet 
(MSDS) is available 
Keep all unnecessary staff off site during pressure testing, pumping, and perforation 

operations 
Hold a safety meeting prior to the treatment  with all personnel on location 
For critical jobs or with new, relatively inexperienced crews, hold dry runs of critical 
operations 


Health, Safety & Environment 
Considera&ons (cont.) 
!  Pressure test all lines prior to the treatment 
!  Determine the position of all valves and sequences of opening and closing of the 
! 
! 
! 
! 
! 
! 

valves 
Make sure all lines are secured and anchored 
Check the monitoring equipment prior to the main treatment 
Designate a gathering area in case of an emergency 
Establish an equipment failure contingency plan 
Make sure that adequate first aid facilities, including qualified personnel, are 
available on site 
Establish ‐ prior to the treatment ‐ handling and disposal procedures 


Resump&on of produc&on 

HSE aspects of s&mula&on 


General HSE guidelines for s&mula&on