Kertang28 Jun 2024 15:09
On seal and gas chimneys/leakage etc - it's worth reading up on the links for better understanding of Marjoram, Lang Lebah and Kasawari in respect of analogues to Kertang. These were provided in slide 11. All 3 are in development and sour. They're provided for a reason ie to read further and understand what we might have here.
Sources were -
1 Kasawari image from “Geophysical Applications in Malaysian Basins”. PETRONAS, 2019, in co-operation with EAGE
2 Lang Lebah image from “Unravelling an abandoned giant in Central Luconia Province, offshore Sarawak Malaysia – success story of
Lang Lebah”. Aquilah Amir Jamalullail et. al. The Leading Edge, August 2020
3 Marjoram image from “Top seal integrity assessment using seal properties and leakage phenomena”. Foschi, M. & Van Rensbergen,
P. Marine and Petroleum Geology,139, 2022.
Marjorams gas chimney actually hid a multi tcf gas field.
"The Marjoram Gas Field is a multi-trillion cubic feet reservoir obscured by a large gas chimney" Lengthy article but extremely well worth it when you get to the detail and explanation of the seals, overburden, amplitude anomailes (such as Kertang) and gas chminey.
"The main conclusions are as follows
1. The Marjoram Gas Field is a multi-TCF gas field obscured by a large gas chimney composed of 10s of amplitude anomalies and consistent with the definition of vertical anomaly cluster
2. Detailed analysis of the vertical anomaly cluster, using centroid analysis, reveals a precise pathway for gas leakage across the overburden
3. Integration of the geophysical observations with pressure test data shows that mode I dilation of a fracture induced by the 455 m gas column in the reservoir is responsible for leakage
https://www.sciencedirect.com/science/article/pii/S0264817222000514
"The development of the Rosmari Marjoram gas field is significant as we estimate reserves to be just under 3 trillion cubic feet that will support a revival of gas production in Sarawak. With an estimated 800 million cu ft/d of production, this will contribute to more than 5 million tons of LNG per year," Zhi Xin Chong, Director of South and Southeast Asia for Gas at S&P Global Commodity Insights, said separately.
https://www.spglobal.com/commodityinsights/en/market-insights/latest-news/lng/071322-shells-malaysia-gas-project-moves-ahead-with-engineering-contract
Shell starts development of Rosmari-Marjoram’s onshore plant
21 Sep 2023
Bintulu − Sarawak Shell Berhad (SSB), a subsidiary of Shell plc, marks the start of the onshore plant development for the Rosmari-Marjoram project with a ground-breaking event in Bintulu.
Siituated 220 kilometres (km) off the coast of Bintulu, off the coast of Sarawak, Malaysia. The fields will be primarily powered by renewable energy. .
The project comprises a deep-water subsea facility, a remotely operated offshore platform, and an onshore gas plant. It also includes one of the longest sour wet gas offshore pipe