“山前油气富集”与大油气田勘探方向——再论山前油气富集

“HYDROCARBON ENRICHMENT IN FORELANDS”AND EXPLORATION DIRECTION FOR LARGE OIL AND GAS FIELDS-REDISCUSSION ON HYDROCARBON ENRICHMENT IN FORELANDS

李丕龙

Li Pilong

中国石化, 西部新区勘探指挥部, 新疆, 乌鲁木齐, 830011

West Headquarters for New Asea Exploration, SINOPEC, Urumqi, Xinjiang 830011, China

山前,作为油气勘探的领域之一,具有油气富集和成藏的石油地质条件,是“二次生烃”、油气“二次成藏”和“再次调整晚期成藏”最现实地区,也是油气“快速成藏”和“多次调整近期成藏”的最有利地区。山前构造样式多样,不同构造样式的油气富集成藏与石油地质因素之间存在一定的相互控制和制约关系。“挤压-走滑”混合构造样式更有利于油气富集和晚期(或近期)成藏的大油气田形成,而长期隆升区的掀斜构造样式更有利于“早期(原生)油气藏”的保存。

As one of areas for hydrocarbon exploration, forelands have petroleum geological conditions for hydrocarbon enrichment and accumulation. They are the most practical areas for "secondary hydrocarbon-generation", "secondary pool-formation" and "a second time adjustment and late-stage pool-formation", and they are also the most favorable areas for "rapid pool-formation" and "many times adjustment and recent pool-formation". The tectonic styles of forelands are varied. There exist certain mutual controlling and restricting relations between the enrichment and accumulation of hydrocarbon with different tectonic styles and petroleum geologicl factors. The mixed "compressional-strike slip" tectonic style is more favorable to hydrocarbon enrichment and the formation of large oil and gas fields accumulating in late (or recent)stages. On the other hand, the tilted tectonic style in long-term uplifting areas is more favorable to the preservation of "early (primary) stage oil and gas pools".

https://doi.org/10.11781/sysydz200502101