南堡凹陷的形成演化与油气的关系

RELATIOSHIP BETWEEN FORMATION,EVOLUTION AND HYDROCARBON IN NANPU SAG

周海民 魏忠文 曹中宏 丛良滋

Zhou Haimin Wei Zhongwen Cao Zhonghong Cong Liangzi

南堡凹陷是一个中生代开始发育的含油气凹陷,经历了断陷期和坳陷期两个演化阶段,具幕式沉积特点。区内构造带呈环状展布,可分为周边凸起潜山构造带、近边或裙边构造带及凹陷中央构造带。以高柳断层为界,呈南北分区的格局。圈闭的形成与展布明显受构造演化控制,断陷期以背斜、潜山圈闭为主,坳陷期以各种类型的断块、断背斜圈闭居多。

Nanpu Sag is a Meso-Cenozoic petroliferous sag.The sag underwent fault-subsided and depressed stages and possesses episodic sedimentary property.The structural belts within the sag are distributed annularly and could be divided into peripheral uplift-buried-hill structural belt,marginal strutural belt and the central structural belt of the sag.These structural belts are separated into south zone and north zone bounded by Gaoliu Fault.The formation and distribution of traps in the sag were controlled by structural evolution. Traps of anticline and buried-hill types were formed in fault-subsided stage;traps of fault block and fault-antieline types were formed in depressional stage.

10.11743/ogg20000415