济阳坳陷临南洼陷油气运聚方向与分布规律

摘要

Research results of the impact of tectonic stress field, fluid potential, fault plane morphology and its matching relation with attitude of carrier bed to hydrocarbon migration and accumulation show that, dominant migration hydrocarbon direction in Linnan sag, Jiyang depression is chiefly from generating sag to the surrounding, mainly NS direction. To Linshang and Xiakou fault zones, fault concave surface of hanging wall, fault convex ridge, convex surface of hanging wall and the ridge formed by carrier bed and fault surface became the dominant migration pathway and direction of hydrocarbon migration and accumulation; The overall performance of oil and gas reservoirs distribution is along the dominant migration pathway and direction as "fruits along the vines", "flowers along the sticks"; The lateral sealing of fault led to oil-bearing differences in different locations, structural styles differences led to different accumulation modes in different basin structural units.%构造应力场、流体势、断面形态特征及其与输导层产状的匹配关系对油气运聚有显著影响.研究结果表明:济阳坳陷临南洼陷油气优势运移方向表现为自生油洼陷向周边,以近SN向运移为主,至临商、夏口断裂带,则上盘的断裂凹面处、断面的凸脊、下盘的断裂凸面处及输导层与断面形成的构造脊是油气运移和汇聚的优势通道和方向;油气藏分布整体表现为沿着油气优势运移通道与方向"顺藤结果"、"沿枝开花"的格局;断裂的侧向封堵性导致临南地区不同位置的含油性差异,构造样式的差异性导致不同盆地结构单元的成藏模式不同.