Infill Opportunities after 45 Years of Production from the L10 Central Gas Field, Dutch Sector of the Souther North Sea

In 1969 the Placid Oil company made the first offshore gas discovery in the L10 block of the Dutch sector of the Southern North Sea. The asset now operated by ENGIE is producing gas from the Permian Rotliegend sandstone reservoir, located at a depth of about 4000m. After 40 years of production, ENGIE decided to acquire a new Pre Stack Depth migrated seismic. The aim was to benefit from a large continuous seismic dataset and apply the latest processing technology in order to unlock remaining potential of this asset. It was the starting point of a complete data review going from structural geology (field compartmentalization and fault seal analysis), to sedimentology (core description, well correlation), petrophysics (homogenize decades of well logs interpretations) and production data (formation pretest and material balance analysis). This work has resulted in de-risking several prospects and identifying new infill opportunities. The example of the L10 Central field review will illustrate this successful story.