地层超覆油气藏勘探失利原因及解决方法——以太平油田和陈家庄油田为例

Causative factors and countermeasures of the exploration failure of stratigraphic onlap hydrocarbon reservoirs-taking Taiping and Chenjiazhuang Oilfield as examples

随着隐蔽油气藏勘探的不断深入,地层超覆油气藏日益显现出巨大的勘探潜力。总结地层超覆油气藏的勘探教训,加强地层超覆油气藏勘探技术研究,对该类油藏的勘探具有重要意义。从地层超覆边界、储层预测、含油条带和油气运移距离等方面分析了地层超覆油气藏勘探中的失利原因;指出勘探中确定精细地层超覆边界的准确位置和合理的部署原则,重视地层精细划分与对比,考虑油气运移范围等因素,对于地层倾角不大、含油气高度小的地层超覆油气藏尤为重要,可极大地提高该类油藏的勘探成功率。

With the subtle reservoirs exploration developing,the stratigraphic onlap hydrocarbon reservoirs increasingly show great exploration potential. So it is important to summarize the exploration experience and to strengthen the exploration techniques research of the stratigraphic onlap hydrocarbon reservoir. In this paper, the reasons caused unsuccess of the stratigraphic onlap hydrocarbon reservoir exploration are analyzed from aspects of the stratigaphic overlap boundary, reservoir forecast, oil-bearing belts, hydrocarbon migration distance and the others. It is pointed out that ascertaining the overlap boundary of subtle stratum, confirming the appropriate deployment principle, attaching importance to the subtle stratigarphic division and correlation, and considering the hydrocarbon migration distance and other factors,are significant to the exploration of the stratigraphic onlap hydrocarbon reservoir with moderate stratigraphic dip and low oil-bearing height. Thus the success ratio of stratigraphic onlap hydrocarbon reservoir exploration will be greatly improved.