8/11/2019 Fracturing Ecuador Sacha Cs
1/1
CHALLENGE
Reverse production decline from a sandstone
reservoir in Sacha field, Ecuador, through an
optimal hydraulic fracturing program.
SOLUTION
Use detailed well and reservoir analysis
combined with extensive experience and
advanced stimulation technologies to design
and execute the most suitable fracturing
program for one well.
RESULTS
Increased average oil production from 180
bbl/d to 600 bbl/d, recovering stimulation
costs in less than one week.
The job performed by Schlumberger
was above our expectations. It
opened doors for future fracturing
treatments in the Sacha field and anew opportunity for our field
in the
Hollin formation.
Gino Hinojosa
General Manager
ORNCEM
Reverse declining production through hydraulic stimulationORNCEM
completed Well 258D in the Upper Hollin sand, Sacha field, Ecuador,
in April 2012.
Oil production stabilized at approximately 300 bbl/day but
started to decline steadily a month
later, reaching 180 bbl/d by August 2013. The operator decided
to stimulate the well to enhance
production. Schlumberger accepted the challenge of planning and
executing an optimal stimulation
operation.
Use advanced workflows and technologies to optimize
treatmentORNCEM and Schlumberger worked as a team, evaluating the
geology, petrophysics, well completion
and initial well test as part of a detailed reservoir and well
analysis. They concluded that production
could be significantly increased (formation damage had grown
over time from an initial skin value of
22 to 25). Hydraulic fracturing would enhance results; the thick
carbonate and shale sequence above
the 20-ft-thick sand and the thick shale below would provide
excellent barriers to fracture height
growth. Compared with existing practices in Ecuador, the
hydraulic stimulation program for Well
258D incorporated the following for significant
improvements:
FracCADE* fracturing design and evaluation software
Properly sized ceramic proppant
OneSTEP* simplified sandstone stimulation system, which uses an
optimal engineered fluid for
effective formation damage removal and to increase production
with minimal risk
Tip-screenout (TSO) fracture treatment to inflate dynamic
fractures for maximum fracture
conductivity and reduced wellbore drawdown.
Increase average daily production more than threefoldImmediately
after the fracturing treatment, production rose to over 600 bbl/d,
with no sand produced.
Oil production stabilized at 575 bbl/d. Incremental oil
production for the first 60 days surpassed
25,000 bbl, increasing ultimate recovery and recovering cost of
treatment in fewer than six days.
The teams extensive experience in hydraulic fracturing, combined
with a proven candidate selection
process and close cooperation, resulted in a substantial return
on investment for ORNCEM. The
operator plans to continue using this integrated approach on
additional wells in the Sacha field.
CASE STUDY
slb.com/Stimulation
Engineered Hydraulic Stimulation Increases60-Day Oil Production
by More Than 25,000 bbl
Careful candidate selection, experienced fracture design,
advanced technologies,and good teamwork more than triple production
in Ecuadorian well
*Mark of SchlumbergerOther company, product, and service
namesare the properties of their respective owners.
Copyright 2014 Schlumberger. All rights reserved. 13-ST-0112
Downholepressure,
psi
Liquidrate,
bbl/d
AprJan 2013 Jul Oct Jan 2014
1,500
1,000
500
600
400
200
Intake pressure
Production rate 1:qo
Production rate 1:qw
Surface Pressure and Oil Production Plot
