Reservoir structure and geological setting of the shallow PEON gas reservoir

Abstract

In recent years, the petroleum industry started to look for new, unconventional energy resources. Peon, a shallow gas discovery in the northern North Sea, are being assessed as a possible energy resource. However, there are challenges related to reservoir pressure, sealing mechanism, and fluid migration. In this regard, geophysical and well log analyses is figured out to get a better understanding of the depositional regime and stratigraphy in the Peon area, as well as the structure of Peon and the dipping nature of the gas-water contact.

During the last 1.1 million years, the Norwegian Channel Ice Stream have fed the Norwegian Continental Shelf with enormous amounts of sediments. Peon is located at the base of a regional unconformity in the outer part of Norwegian Channel. The overburden and the reservoir reveal several prominent surfaces, distinguishing sub-horizontal bedded units. The presence of iceberg plough marks and mega-scale glacial lineations on these surfaces and several till units interbedded, testifies what great actor the ice streams had during deposition. Peon reservoir deposited likely during a glacial retreat. Orientation of reservoir, erosional truncations and structures in the top reservoir indicate a glacial advance has remobilized and cut the reservoir, forming a lensoid-shaped reservoir.