【摘要】 在地震资料精细构造解释基础上,运用断裂几何学、运动学来研究番禺4洼晚期断裂系统的基本特征。该晚期断裂在NWW—SEE向张扭应力场作用下发生简单剪切右旋走滑变形基础上形成和发育,主要分布在洼陷南侧。平面上呈NWW走向,断裂组合以平行式、交叉式、斜列式为主;剖面上以负花状组合为主。新近系构造圈闭的形成及分布受控于晚期断裂;长期活动的断裂和部分晚期断裂为研究区油源断裂,其他晚期断裂则控制了油藏在新近系的空间分配和再次调整;晚期断裂较好的侧向封闭性控制了油藏最终分布和储量规模。更多还原

【Abstract】 The characteristics of late-stage fracture system in the Panyu 4 sag of Pearl River Mouth Basin have been studied by employing fracture geometry and kinematics based on fine interpretation of seismic data.This late-stage fracture system was formed and developed by right shear strike-slip deformation under NWW-SEE tension-torsional stress field,mainly distributed in the south of the sag,trending NWW,with the dominant fracture patterns including parallel style,cross style and echelon style,and showing negative flower structure on cross-section.The formation and distribution of Neogene structural traps were controlled by late-stage fractures;long-term active fractures and partial late-stage fractures had served as oil source-connecting fractures,while other late-stage fractures controlled spatial distribution and re-adjustment of Neogene hydrocarbon accumulations;and effective lateral sealing ability of late-stage fractures controlled the ultimate distribution of reservoirs and reserve scale.更多还原