【摘要】 利用二、三维地震资料联合解释,通过对王府断陷的地质结构解剖、沉积和构造发育史研究、火山岩识别和有利区带评价,得出以下认识:①王府主断陷是由三条主断层控制的具双断结构性质的断陷,断陷走向为北东向,从西至东发育山东屯、小城子和武家屯三个构造带,经历了断陷期、断拗转换期、拗陷期、萎缩期四个构造演化阶段,发育了泉头组一段碎屑岩、沙河子组和火石岭组火山岩三套含气层系,其中以火石岭组原生气藏储量规模最大。②火石岭组火山岩储层分为火石岭组顶部流纹岩及安山岩储层,流纹岩表现为高频、高连续强地震反射特征,安山岩内部地震反射特征呈杂乱弱反射,连续性差;沙河子组火山岩主要为沙河子组底部的沉积火山角砾岩储层,在地震剖面上表现为复波,呈低频、高连续—中等强度反射。③优选小城子构造带和山东屯构造带实施钻探,取得了天然气勘探的重要发现。更多还原

【Abstract】 Using 2D and 3D seismic data interpretation,we have conducted volcanic rock identification and favorable zone evaluation based on the geological structure,the sedimentary and tectonic history in Wangfu Fault Depression.The observations are obtained as follows:① The main rift in NE has double fault structure properties controlled by three main faults.It developed three structural belts:Shandongtun structure belt,Xiaochengzi structure belt,and Wujiatun structure belt.The tectonic evolution of Wangfu Fault Depression can be divided into four stages:faulting period,fault-to-depression transforming period,depression period,and withered period.Three gas-bearing series were developed:clastic rocks of Quantou Formation,volcanic rocks of Shahezi Formation and Huoshiling Formation.The primary gas reservoir of Huoshiling Formation is the largest reserve among them.② The volcanic reservoir of Huoshiling Formation is divided into top rhyolite reservoir and andesite reservoir.Seismic reflections of rhyulite are characterized by high frequency and continuously strong amplitude,but andesite reflection is weak and messy,and discontinuous.The main reservoir of Shahezi Formation is sedimentary volcanic breccia in the bottom,which appears as low-frequency continuously complex wave with middle energy on seismic sections.③ Our well location proposal focuses on the Xiaochengzi structural belt and the Shandongtun structural belt.Some important gas reservoirs are discovered by drilling.更多还原