English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The potential for long term growth of the EP sector within Sabah is heavily dependent on the successful exploration and development of the deep water MiddlelLate Miocene-Pliocene turbidite play offshore West Sabah. With the top ranking prospects in this frontier area all lying in water depths in excess of 900 m, a major challenge is to optimise the use of the limited available data in reducing reservoir related risks and developing new play concepts. This requires an understanding of the complex interaction of sedimentary and tectonic processes along this under-explored, active tectonic margin. The application of analogues taken from the "classical" turbidite provinces (e.g. Gulf of Mexico) is not seen as directly applicable. There is an exceptionally large height differential of 7 km, over the relatively short distance of 200 km between the sedimentary hinterland and the base of the continental slope offshore West Sabah. This setting coupled with the intense and continued transpressional tectonic activity along the margin affords a different perspective on deep water sedimentation from the better known passive continental margins . As such new models and concepts are being developed to explain many of the observations noted within the area from both wells and seismic. INTRODUCTION Figure 1 shows SSPC's current strong acreage position with 2 strategic deep water blocks (Blocks G and J) covering a total of 6,328 lun2 in a water depth range from 150 m to 2,000 m. Within this area only 3 wells have tested the play and two of these wells, Kebabangan-1 and Kinarut-1, have discovered hydrocarbons in exceptionally sand rich deep water deposits . MODERN MORPHOLOGY One of the methods employed has been the study of modern depositional processes as a potential analogue to the Miocene-Pliocene turbidite play. The study involved the establishment of a regional digital terrain model for the topography and bathymetry ofthe area. This extensive da~abase (>100,000 lun2) has been compiled from a variety of data sources including conventional 2D and 3D seismic, high resolution seismic, sonar, navigation charts and cartographic maps. Figure 2, generated from this dataset, shows a 3D perspective view of the modern sub-marine and sub-aerial morphology of Sabah. This figure highlights the proximity of West Sabah's mountainous hinterland, including the coastal Crocker Ranges and the 4,101 m high Mt. Kinabalu plutonic complex. This setting is in marked contrast to the better-known passive Atlantic margin settings (Fig. 3). The submarine morphology is no less spectacular (Fig. 4). A broad 80-100 km shelf, currently the site of mixed clastic/carbonate sedimentation, passes beyond the shelf break into a steep continental slope. The average slope angle is > 20 (compared to < lain the GOM) but locally it can reach almost 100. The slope profile is heavily influenced by the shore-parallel thrust ridges, the dominant tectonic style for the outboard region (Fig. 5). In the proximal upper-slope setting the intra-thrust depressions have been filled and are now characterised by sediment by-pass features such as canyons, channels and slump scars. Many of these features are illustrated in detail on figure 6a and 6b, an illuminated bathymetric map of the KebabanganKamunsu 3D survey, straddling the current shelf margin and extending to water depths of 1,400 m.

Modern morphology - ancient analogue: insights into deep water sedimentation on the active tectonic margin of west Sabah