东濮凹陷半地堑分析

The Analyses of Half-Grabens in Dongpu Depression

普通意义上的“裂谷”、裂陷盆地实际上大部分是一系列半地堑以不同方式联结而成。本文以半地堑理论为基础，分析了东濮凹陷中半地堑联结的一些实例，进而通过对整个凹陷的半地堑分析，指出本濮凹陷实质上是由30余个半地堑（ES3期）错综复杂联结而成，并通过半地堑分析，揭示了其演化过程。由此，从另一个角度，对东濮凹陷的结构形态产生了新的认识。最后分析了半地堑联结与油气聚集的关系，并指出了东濮凹陷今后的几个勘探方向。此文证明了半地堑理论的实用性与优越性，是盆地分析工作中的一种新思路、新方法。

Most of the rifts and faulted basins,in common sense,are series of halfgrabens connected in different ways. Based upon half-graben theory,this paper gives some examples of half-graben assemblage and analyses all of the half-grabens in Dongpu Depression, pointing out that Dongpu Depression is composed of more than 30 half-grabens (belonged to ES3)connected in complicated ways. Through the analyses of the half-grabens this paper reveals the evolutionary process of the half-grabens,thus a new idea of the structural form of Dongpu depression comes into being. Finally,the paper analyses the relationship between the half-graben assemblage and the hydrocarbon accumulation,also points out several exploration directions in the future. This paper proves the practicality and advantages of the half-graben theory which is a new thinking and a new method in basin analyses.