摘要
在伸展断陷盆地中,构造变换带对油气具有重要的控制作用,其附近往往是油气富集的有利部位。伸展断裂沿走向上发生伸展量呈消长关系变化的部位通常是构造变换带发育的部位。由于地层的沉降幅度在构造变换带附近具有减小的趋势,沿构造变换带走向上地层沉降幅度的差异造成了大港油田板桥凹陷"凸、凹相间"的构造古地理格局。构造变换带附近往往发育断鼻等正向构造,因此,构造变换带也常常是油气富集的有利部位。研究发现,板桥凹陷构造变换带较为发育,且其附近断鼻构造圈闭发育,并处于生烃洼陷之中,因此,构造变换带成为板桥凹陷油气较为富集的有利部位。
The tectonic transfer zones have a great control on petroleum in the extensional rifted basin and petroleum usually accumulates near these zones. They are usually developed in the area where the stretching throws of the fracture have a decreasing-increasing change along the strike direction. The magnitude of subsidence of the strata tends to decrease near the tectonic transfer zones, thus the differencial of subsidence along the tectonic transfer zones leads to the development of a tectonopalaeogeographic frame- work of the alternated structural highs and lows. The faulted nose structures are developed adjacent to the tectonic transfer zones, therefore petroleum usually accumulates along the zones. The results show that the tectonic transfer zones are widely developed in the Banqiao Sag of Dagang Oilfield. Due to the development of the faulted nose structures near the tectonic transfer zones which are located in the hydrocarbon generation sags, the tectonic transfer zones are the favorable areas for petroleum to accumulate,
出处
《古地理学报》
CAS
CSCD
2008年第1期73-76,共4页
Journal of Palaeogeography：Chinese Edition
基金
“973”国家重点基础研究项目子课题(编号：2001CB209106)“高效天然气藏形成与分布研究”
