26 4d fixed installation seismic
➠
development programme, including delivery of high- Corporation has, through its Concept Systems offshoot,
fidelity sensor performance. reached a deal to provide 'acquisition optimisation
The net result is that, Fosar is now available for services for all of Petroleum Geo-Services’ (PGS) repeat,
seismic permanent reservoir monitoring applications. time-lapse (4D) seismic surveys this year.
Meanwhile, Schlumberger has reported the expansion
of its Deep Reading portfolio with the release of the
The workscope covers:
new electromagnetic DeepLook-EM enhanced “cross- Survey design and feasibility – Evaluating the multiple
well” reservoir imaging and monitoring system and acquisition scenarios and resources that influence
the acquisition of cross-well seismic reservoir imaging acquisition to ensure the appropriate balance of data
technology. quality and cost efficiency.
The services include pre-job planning, modeling,
l Coverage modelling – Utilising proprietary technology
simulation, acquisition, processing and inversion to
for advanced feather prediction to perform accurate
deliver inter-well reservoir images.
coverage and repeatability modelling for any given sail
“DeepLook-EM and our recently acquired Z-Seis
track.
cross-well seismic service bridge the resolution gap
l Survey Optimisation – Providing experienced in-field
between well logs and surface measurements to provide
specialists to combine predictions and acquired data with
customers answers at the reservoir scale,” Colin Hulme,
the latest technology to dynamically optimise acquisition
technical director at Schlumberger unit Deep Reading said
in real-time.
at this year’s Middle East Oil & Gas Conference.
“The addition of these technologies provides the The agreement further extends the recently signed
opportunity to deliver advanced reservoir monitoring 5-year, fleet-wide agreement l for PGS’ use of ION’s Orca
answers from combined measurements and by integrating command and control system, which lies at the heart of
them with additional data.” ION’s Intelligent Acquisition portfolio. During these time-
The second generation DeepLook-EM system provides lapse surveys, the companies will work together to jointly
detailed resistivity profiles between wells up to one develop advanced 4D features to further improve data
kilmetre apart using time-proven induction logging quality and survey operations.
principles. Acquisition is performed using a dynamic Successful 4D surveys acquire data with sufficient
transmitter sonde in one well and an array of receivers in fidelity to track reservoir fluid movements over time. Due
an offset well. Receivers can be deployed in open or cased to the high repeatability requirements, 4D surveys often
wells. incur costly and time-consuming re-shoots to meet field
In development for more than seven years, operator specifications. ION reckons it can do this.
Schlumberger has now successfully completed DeepLook- Concept Systems’ breakthrough real-time modelling
EM surveys in Canada, China, Brazil, Middle East and the software is designed to accurately predict the impact
US. of various acquisition options. Experienced in-field
The group says that the cross-well images are acquisition specialists select the optimal choice at every
providing customers vital information on the efficiency of step. The comprehensive process strives to achieve
water- and steam-flood programmes allowing inter-well maximum repeatability, productivity, and safety.
saturation to be estimated and bypassed pay zones to be A closing snippet for this brief summary ... and link
identified. with our seismic technology review ... is StatoilHydro’s
Inter-well resistivity variations can be caused contract with PGS to deploy its ground-breaking
by changes in saturation during water-flooding, in GeoStreamer technology on 4D work on the Norwegian
temperature during steam-flooding or porosity reduction Continental Shelf.
if subsidence occurs. This will facilitate the shooting of seismic to be
With time-lapse monitoring using DeepLook-EM, compared with former seismic surveys and thus provide
flood-front movement can be accurately depicted and more reliable results for 4D studies. PGS’ second new
tracked. S-Class Ramform vessel, will work with both steerable
All field data are compiled within Petrel* seismic-to- streamers and steerable sources in order to produce the
simulation software, and are seamlessly integrated to highest possible repeatability for 4D surveys.
model and interpret the reservoir volume logged. A measure of the value that StatoilHydro places on 4D
Schlumberger says Interwell seismic imaging can today is that, up to mid 2008, the company had drilled 17
provide seismic velocity profiles and seismic imaging at wells in its North Sea Gullfaks field based on this seismic
resolutions an order of magnitude higher than surface technique. The company has admitted too that these
seismic. wells would hardly have been drilled without the use
This detailed information can be used to understand of this technology. And the Gullfaks prize ... 60 million
reservoir characterization at the reservoir scale and in a barrels of high grade crude.
time lapse mode to monitor fluid movements such as in Basically, 4D has proved a moneyspinner for
steam injection and CO
2
sequestration. StatoilHydro and is now a vital tool for accessing
Also fresh off the press, so to speak, ION Geophysical $ billions worth of additional reserves. l
www.engineerlive.com
Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44