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Chinese state-owned companies are also significant investors in sudan 's oilfields .

中国国有公司也是苏丹油田的重要投资方。

Cnooc , the country 's largest offshore producer , inked two deals to develop shale oilfields in the us jointly with chesapeake energy late last year and early this year .

去年底和今年初，中国最大的离岸油气生产商中海油签署了两项交易，与切萨皮克能源公司（chesapeakeenergy）联手在美国开发页岩气田。

Analysts say its cleverest tactic is its quiet accumulation of prospecting rights , less controversial than working mines and oilfields .

分析师表示，中国最聪明的策略是悄然累积探矿权，其争议性要小于开采中的矿山和油田。

Industry analysts say sinopec is eager to tap similar processes at home to maintain production at its own domestic oilfields .

产业分析人士说，中石化急于在国内采用同样的工艺，以保证国内油田的产量。

A month ago , reports emerged that the chinese state-owned oil major was sniffing around stakes in nigerian oilfields .

一个月前，有报导说这家中国国有石油公司正在觊觎尼日利亚油田的股份。