WGS - Examples

	EXAMPLES OF SERVICES & TECHNICAL PAPERS

WGS has experience of a wide range of geological provinces from around the world, these include:
Cuyo (Mendoza) and Nequen Basins, Argentina Anardako Basin, USA Southern North Sea, Germany and Netherlands Northwest German Basin, Germany Diyarbakir Basin, Turkey and Syria Zagros Foldbelt, Turkey, Syria and Iraq Trans Syrian Trough (Al Furat Trough), Syria and Iraq Arabian (Persian Gulf), Kuwait, Qatar, United Arab Emirates and Oman Andaman Basin, India, Myanmar and Thailand Mergui Basin, Thailand North Sumatra Basin, Indonesia Central Sumatra Basin, Indonesia South Sumatra Basin, Indonesia Sumatra Fore-arc Basin, Indonesia Sunda Basin, Indonesia Northwest Java Basin, Indonesia West Natuna Basin, Indonesia Malaya Basin, Malaysia East Natuna Basin, Indonesia Nam Con Son Basin, Vietnam West and Central Luconia, Malaysia Northwest Palawan Basin, Philippines Central Java - Pati Basin, Indonesia East Java Basin, Indonesia Northeast Java Basin, Indonesia	North Lombok Basin, Indonesia Bali - South Lombok Basin, Indonesia Spermonde Basin, Indonesia Asem - Asem Basin, Indonesia Barito Basin, Indonesia Melawi Basin, Indonesia Kutei Basin, Indonesia Northeast Kalimantan Basin, Indonesia Sandakan Basin, Malaysia Sengkang Basin, Indonesia Buton Basin, Indonesia Banggai - Sula Basin, Indonesia Salawati Basin, Indonesia Bintuni Basin, Indonesia Arafura Basin, Indonesia Akimeugau Basin, Indonesia Bula, Indonesia South Timor Basin, Indonesia Lengguru Foldbelt, Indonesia Browse Basin, Australia Bonaparte Basin, Australia Malita - Calder Basin, Australia Money Shoal Basin, Australia Carpentaria Basin, Australia Papuan Basin, Papua New Guinea Canterbury Basin, New Zealand East Coast Basin, New Zealand Taranaki Basin, New Zealand Pearl River Basin, China
These provinces have all been worked on in projects lasting for at least two weeks. Shorter projects have been undertaken in additional areas in the Middle East, Asia and Australasia. Many of the provinces listed above contain significant proven hydrocarbon systems with oil & gas discoveries that have been commercially developed. WGS has experience of the whole spectrum of exploration work, including applying remote sensing techniques in unexplored areas, geological and geophysical surveys, interpretation and integration of geoscience data, exploration drilling, appraisal/delineation drilling, reservoir studies and plan of development applications. WGS has experience of all geological structural styles (including both salt and shale diapirs) and has carried out many projects involving sequence stratigraphy. Data from most projects is obviously proprietary and the results are usually confidential. However, the examples on this page are from work using non-proprietary data. The following three examples are from seismic interpretation projects:
An example of Palaeogene rifting from the Sunda Basin, Indonesia. Hydrocarbon source rocks occur between the Red and Purple seismic reflectors. The main producing reservoirs, Oligocene - Miocene Talang Akar sandstones, are found between the yellow and green seismic reflectors. Elsewhere in the basin Baturaja carbonates (located just above the Dark Blue reflector) form reservoirs in several fields.
	A seismic line from the Central Sumatra Basin, Indonesia, which shows a rift system that has undergone inversion. Source rocks, the Brown Shale member of the Pematang Formation, were encountered in the well MS TA-2 between the Red and Purple seismic reflectors. Oil was produced from the Sihapas sandstones between the Green and Dark Blue reflectors.
The timing of the structural inversion is clearly shown by the change in TWT between the Light Blue and Pink reflectors on the left (Southwest) end of the seismic line.
A seismic line from the East Java Basin, Indonesia, which shows moderate inversion of Neogene strata. The Tungkul oil field (on the left) was discovered in 1901 and the Loesi oil field in 1930. Both fields produced from the shallow calcareous sandstones of the Wonocolo Formation. These sandstones are situated above and below the Pink reflector.
WGS has also carried out many specialist projects and the following slides illustrate some of these.
	A representative seismic section and a type log from the Badak field, Kutei Basin, Indonesia. The Badak field was discovered in 1972 and has reserves of over one billion barrels of oil equivalent. This previously published data was integrated into a regional sequence stratigraphic framework for the whole basin with the aim of identifying potential untested hydrocarbon fairways.
An example from a large scale project. This involved the study of over four hundred wells as part of a seismic correlation of the basins of Western Indonesia using regional and inter-regional composite seismic lines. The curves indicate average sediment thickness (green line), "weighted" average sediment thickness (blue line) and maximum sediment thickness (red line). Two wells are also shown (dark blue and yellow lines).
	Examples of some of the wells used in this study.
This is another example of a project in the Kutei Basin, Indonesia. It is a compilation map of all available data (outcrops, well penetrations, etc.) for Middle Eocene Sediments. The Kutei Basin is well known for the many publications concerning the Neogene. However, a case can also be made for hydrocarbon potential in the Palaeogene.
	WGS has completed several detailed studies of Indonesian Basins for various clients. Often reserve and historic production data are required. Consequently, WGS has researched many of the historic data sources in order to be able to provide reliable information. This slide indicates the reserves by field and year of discovery for all oil and gas fields discovered in the South Sumatra Basin since exploration began in the 1880s.
This slide, from another study of the South Sumatra Basin, shows the "creaming curves" of all discoveries in the basin until December, 1996.
If you would like more information on any of these slides, or a quotation for a detailed report on any Indonesian or New Zealand Basin, please contact us. Please also visit the technical papers page. Services \| Deployed Software \| Links \| Home \| Contact Us