世界含盐盆地盐下油气勘探历史与展望（增刊）

含盐盆地油气勘探历史已经历一个多世纪,直到1963年在西非加蓬盆地发现第一个盐下油气田,为含盐盆地油气勘探开辟了一个新领域。十九世纪70年代,三维地震采集技术应用在盐下油气勘探,取得了良好的效果,发现了多个陆上盐下油气藏。随着地震采集技术、钻探技术的进步和叠前深度偏移技术应用条件的成熟,含盐盆地盐下油气勘探领域已经能够扩大到海上,1990年埃克森公司在密西西比河谷211Midkey远景区有了墨西哥湾第一个重大的盐下油气发现,拉开了世界海上含盐盆地盐下油气勘探序幕。海上多波采集技术、高密度三维采集技术,基于波动方程的叠前深度偏移技术、大地电磁技术和双梯度钻井技术、膨胀管技术、欠压实钻井技术等钻井技术的进步,为盐下油气藏储量的增长提供了技术保障。

The history and of Oil-gas Exploration in Presalt of the Salt Basin

The oil-gas exploration of salt basin has been experienced a history of more than one century. Until 1963, it is the discovery of the first salt basin oil and gas fields in Gabon that lights up a new era for exploring salt basin oil-gas exploration of West Africa. In 1970s, three-dimension seismic acquisition technology was applied in salt oil-gas exploration and made great achievements in land-based presalt reservoirs discovery. With the development of seismic acquisition, drilling technology and pre-stack depth migration technology, the area of exploration has been extended from continent to offshore. In the year of 1990, EXXON made the first and the impressively meaningful discovery of oil and gas below salt in Mississippi Valley 211Midkey in the Gulf of Mexico, which has opened the world"s oil and gas below the salt exploration prelude in salt basin. The development of drilling technology has been providing technical support for the growth of the Reserves of oil and gas below the salt, such as offshore multi-wave acquisition techniques, high-density three-dimensional acquisition techniques, prestack depth migration techniques based on wave equation, MT technology and dual-gradient drilling technology, expansion pipe technology, uncompacted in drilling technology.