Analysts Wood Mackenzie say that global oil and gas major ExxonMobil might have difficulty finding buyers for its Asia Pacific assets, as the company considers a divestment programme that could be worth as a much as $5-billion. ExxonMobil has previously revealed its ambitions to divest up to $15-billion worth of its assets by 2021, with the company at the end of September signing an agreement to sell its Norway upstream operation for $4.5-billion.