济阳坳陷地层油藏勘探实践分析

Exploration of stratigraphic reservoirs in Jiyang Depression

济阳坳陷新近系及古近系发育地层超覆及不整合面遮挡等两种类型的地层油藏。由于地层圈闭识别难度大,油藏形成条件复杂以及原油性质较差等不利条件,以往地层油藏在济阳坳陷油气勘探中未占有重要地位。目前济阳坳陷已进入隐蔽油气藏勘探时期,随着对地层油藏成藏规律的认识不断深化,以及层序地层学、高精度三维地震等勘探新技术的应用,地层油藏的勘探进入规律性勘探阶段,对探明储量的贡献也逐步增大。济阳坳陷地层油藏的剩余资源潜力丰富,勘探空间广阔,具有较好的发展前景。

Two kinds of stratigraphic reservoirs are developed in the Neogene and Eogene of Jiyang Depression, they are stratigraphic onlap reservoir and unconformable surface screened reservoir. Because of the difficulties in distinguishing them, the complexity of their grown conditions, and the relatively poor crude oil characters, the stratigraphic reservoirs used to be unimportant in the exploration of Jiyang Depression. The exploration period of subtle reservoirs in Jiyang Depression is coming. Along with the deepening of cognition in their generating regularity, and the practicing of new exploration technologies such as sequence stratigraphy and high accuracy 3D seismic survey, the exploration of stratigraphic reservoirs has entered a regular exploration period and increasingly contributed to proven reserves. The rich remaining resources and vast exploration field indicate a good developing prospect in the stratigraphic reservoirs of Jiyang Depression.