【摘要】 廊固凹陷是历经50余年油气勘探的老区,曾组织过多次大规模的攻关研究,仅发现了一批规模相对较小的油气藏,没有取得预想的地质效果,但资源转化率仍较低,勘探潜力较大。通过实施开展二次三维地震采集和全凹陷的连片处理,开展了新一轮的"四个整体研究",即整体构造分析、整体沉积砂体研究、整体油气成藏动态模拟和整体区带综合评价;指出了"六个区带、四个领域"为勘探的有利方向。优选大柳泉鼻状构造带,对复杂断块、浅层天然气和深层砾岩等多领域整体勘探,取得重要进展,实现了规模整装储量发现。其勘探经验与做法对其他老探区深化勘探具有一定的借鉴作用和指导意义。更多还原

【Abstract】 Langgu Depression is an old area with an exploration history of more than five decades. A number of large-scale research projects have been launched, which only found a batch of relatively small oil and gas reservoirs, unable to achieve the expected results. The conversion rate of resources remains at a low level and there is still a great potential for exploration. On the basis of the second 3D seismic acquisition and joint processing of the whole depression, a new round of research has been launched including analysis of the whole structure, study of the whole sedimentary sand body, dynamic simulation of the whole oil and gas accumulations and comprehensive assessment of the whole belt. The study defines six belts and four fields as favorable exploration orientations. Daliuquan nose structural belt is selected for multi-area exploration, such as complicated faulted blocks, shallow-layer natural gas and deep conglomerate. With important results achieved, the exploration efforts led to discovery of large-scale reserves. The exploration experience and methods are of certain help and guiding significance to exploration of other old areas.更多还原