中国海相油气勘探前景、主要问题与对策

塔河、普光大油气田的发现表明中国海相层系油气资源潜力大,是重要的油气资源战略接替领域。但是,中国海相层系形成时间早,演化历史长;盆地多阶段演化形成了多套烃源岩、导致了多期成藏和后期的多次调整,油气分布规律复杂,勘探风险大。因此,要取得海相层系油气勘探的新突破,发现更多、更大的油气田,必须坚持勘探和持续投入,坚持理论创新与技术进步,针对海相层系面临的主要问题,发展我国的海相油气成藏理论技术,围绕“多期构造活动背景下海相碳酸盐岩层系油气聚散机理与富集规律”核心科学问题,突出构造演化这一条线,把握三个重点-烃源岩、储层、保存有效性研究重点,强化三个结合-理论创新与勘探实践结合、区域评价与目标评价结合、地质研究与工程技术结合,定能在海相层系发现更多的大油气田。

Exploration propects, problems and strategies of marine oil and gas in China

The discovery of giant oil/gas fields,Tahe and Puguang,shows that China's marine sequences have great hydrocarbon potentials and can be a very important option of strategic energy replacement in China.However,due to an early formation and long evolution history,the marine sequences in China had gone through a multistage evolution,during which several sets of source rocks had formed with several episodes of reservoiring and adjustment.As a result,the distribution of oil and gas in the strata is so complicated that the exploration is full of risk and uncertainty.Therefore,new exploration breakthroughs and discovery of more and larger oil/gas fields in marine sequences require:insisting on exploration and continuous investment;adhering to theoretical innovation and technologic advancement;developing the hydrocarbon reservoiring theory and exploration technology of China's marine sequences to solve the key issues concerning exploration of marine sequences,centering on the scientific topic of 'hydrocarbon accumulation and dissipation mechanisms and enrichment pattern in marine carbonates in a multistage tectonic setting;highlighting the study of structural evolution;focusing on the research of source rocks,reservoirs,and sealing effectiveness;and emphasizing on three combinations,i.e.the combination of theoretical innovation with exploration practices,regional evaluation with target assessment,and geological study with engineering techniques.Only by doing all that can we found more large oil/gas fields in the marine sequences.