Our stratigraphers have substantial experience in this region, having during the course of their careers worked on well sections from Myanmar/Burma (Gulf of Martaban, Tertiary), Thailand (offshore, Tertiary), Vietnam (offshore, Tertiary), Laos, China (the Bohai Basin, Tertiary), Mongolia (Tertiary) the Philippines (Leyte Island, Tertiary), Indonesia (Natuna Basin, Kai Besar, Seram and West Papua, Permian to Tertiary), Timor (Triassic), Papua New Guinea (Papuan Basin, Jurassic and Cretaceous), Sarawak (Tertiary), Brunei (Tertiary), Australia (Browse Basin, northwestern shelf, Cretaceous-Jurassic) and New Zealand (Taranaki Basin, Upper Cretaceous and Palaeogene). Marcus Jakeman has substantial experience as a wellsite palynologist (>40 wells, both onshore and offshore) in West Papua and Papua (Indonesia) and Papua New Guinea, including long-duration assignments of up to 2 months.
Five wells have been analysed in the offshore Northern Carnarvon Basin. These involved the analysis of considerable stratigraphic sections ranging in age from Late Cretaceous to Triassic, using micro- and nannopalaeontology.
Analysis of seven wells, two of which included real-time wellsite biostratigraphy, as well as the review of seven wells. The emphasis has been on nannopalaeontology for the analysis of these Neogene sections; however, a combination of micro- and nannopalaeontology has also been effectively and extensively used on long-duration wellsite from first-returns to TD in Neogene sections. In addition, palynology has provided additional resolution within post-well analyses.
PetroStrat has analysed 18 well sections from the Taranaki Basin, with ages ranging from Neogene through to Late Cretaceous. The biostratigraphic analyses comprise micro- and nannopalaeontology on the younger Tertiary sections and palynology on the older, Palaeogene to Late Cretaceous sections.
Extensive PetroStrat experience offshore Malaysia (Sarawak, Sabah) includes a high-resolution correlation of eight Tertiary well sections in Sarawak based using a novel focussed microfacies/micropalaeontology approach to help correlate complex reservoirs. Additionally several projects have been undertaken using all three biostratigraphic disciplines which in addition to the stratigraphy and well correlation, palaeoenvironmental reconstructions were also interpreted, primarily on the palynological associations, as well as with an input from the micropalaeontology.
Papua New Guinea
Marcus Jakeman has substantial experience as a wellsite palynologist, especially targeting the Papuan Basin Early Cretaceous and Jurassic, which includes the Toro sandstone. This real-time wellsite experience includes long-duration assignments and technician support.
PetroStrat has analysed 22 proprietary wells in West Papua. There was an earlier campaign, which included 16 Palaeozoic sections analysed for palynology. More recently, the focus has moved to the younger, Palaeogene section, and six wells have so far been analysed, with the emphasis on palynology, but also with additional micropalaeontology.
A Neogene micropalaeontology study and correlation was undertaken on 5 wells.
PetroStrat has analysed several wells from Pakistan, integrating the results of the three biostratigraphic disciplines. The emphasis has been on Tertiary and Late Cretaceous sections. A sedimentologist has also undertaken real-time microfacies based wellsite on one offshore, deep-water well in the Indus Basin.
Neogene to Palaeogene sections from six wells have been analysed in offshore Thailand, with the emphasis on palynology, but with some additional micropalaeontology. Fourteen wells, both onshore and offshore, have also been analysed by the sedimentologists at PetroStrat, this work including petrography, XRD and SEM.
PetroStrat has particular experience in the Nam Con Son Basin, offshore Vietnam. Seven wells have been analysed, using the three integrated biostratigraphic disciplines (micropalaeontology, nannopalaeontology and palynology). The sections analysed are predominantly Neogene, although also penetrating the uppermost Palaeogene. Important palaeoenvironmental information has also been gained from these data. Palynological assemblages in the Middle and Early Miocene of the Nam Con Son Basin, offshore Vietnam, are characterised by increased relative abundances of the freshwater fern spore Magnastriatites howardi, which are more typical of low-stand systems tracts, when freshwater systems prevailed on the exposed shelf. In contrast, where high relative abundances of mangrove pollen such as Florshuetzia levipoli are recognised, the host sediments may be equated to high-stand sequence tracts. Additionally, foraminifera acmes can be used to identify and confirm maximum flooding surfaces.
China, South China Sea
PetroStrat has conducted a substantial multi-well study in the South China Sea (Qiongdongnan Basin), involving >1,400 micro- and nannopalaeontological analyses and a review and integration of pre-existing data. This study encompassed stratigraphic sections ranging from Pleistocene to Palaeogene. This was followed up by long duration, multi-well, integrated wellsite services (micro- and nannopalaeontology) monitoring the sections from first returns to TD with many critical decisions covering casing, coring and TD picks. Additional palynology was analysed and integrated post-well.
Four wells have been analysed post-well, with the emphasis on palynology in this non-marine geological setting, but also with additional non-marine micropaleontology. A further borehole has been analysed for sedimentology.
PetroStrat also has experience of working on both academic (with CASP) and industrial projects from Sakhalin covering the Neogene to Cretaceous micropalaeontology (including diatoms and radiolarians).
The image logs from four wells from the Nam Con Son Basin have also been interpreted by the PetroStrat sedimentologists, in order to interpret the sedimentological fabrics and facies and so gain an understanding of the depositional setting.
PetroStrat experience includes the biostratigraphic analysis of one onshore well, as well as core samples and outcrop samples from the Hovsan region on the Caspian coast.
PetroStrat experience includes the biostratigraphic analysis of three offshore wells in the Caspian Sea. These analyses focussed on the Early Mesozoic section in two of the wells, but, in the third well, encompassed a more complete section, from Palaeogene to Palaeozoic.