Publications

To sustain deliverability of mature fields in the current economic environment, operations inevitably will be focused on well interventions instead of drilling (infill) wells. However, the elevated complexity of managing well intervention operations on offshore fields can only meet the solution through proper and efficient well intervention planning. An effort to cope with the aforementioned challenges has been implemented on Peciko, an offshore gas field discovered in 1983 (Mahakam PSC). It is a multi-layered unfaulted field, the sediments of which being deposited in a deltaic depositional environment. Currently, Peciko comprises 8 platforms with a total of 170 active wells. The fact that Peciko shares offshore barges with other fields operated in the PSC and performs simultaneous operations with drilling rigs, indicates that optimization of well intervention planning becomes even more crucial. This stimulated the effort to develop a method that is able to achieve the objective appropriately. This paper shares a comprehensive method in constructing a detailed well intervention plan that provides not only clear future short and long-term planning, but also current perforation portfolio highlighting the remaining yearly un-perforated net pay length along with the associated gain and resources. The method utilizes an inductive approach in the sense that the stakes, risks, intervention schedule and required intervention type are initially evaluated at reservoir level and then progressively summarized to well, platform and eventually field level. Therefore, this method takes into account risks management, contributes significantly to down-hole equipment and surface facilities logistics planning and ultimately leads to costs optimization.