China scrambles to boost oil output
Oil giants led by Sinopec invest heavily overseas as consumption rises and domestic fields age
The mainland's biggest state-owned oil companies, sitting on ageing fields, are scrambling to ramp up crude oil and natural gas production to meet surging domestic demand through a slew of investments that also risk pushing up their costs.
That was partly in response to the government's recent rise in domestic natural gas prices and moves to link pump prices more closely with international crude costs.
The increase, however, is far from enough to bridge the gulf between the energy consumption and production of China, which last month overtook the United States to become the world's largest oil importer.
As domestic oilfields age, the three companies have in recent years poured billions of dollars - the biggest amount in the world so far - into the acquisition of unconventional and traditional hydrocarbon assets overseas, to boost reserves.
They have also invested heavily in risky projects such as deepwater drilling at home and abroad.