【摘要】 综合地质、地球物理及钻井资料,结合天然气勘探研究成果,识别了莺歌海盆地中央底辟带底辟构造地震反射模糊区中的裂隙—微裂隙通道,并联合应用相干技术、三维可视化技术和镂空技术等落实了中央底辟构造带上各底辟构造垂向运移通道的展布情况。研究区垂向运移通道分为底辟通道、断裂通道以及底辟外裂隙通道三大类。底辟通道是研究区最主要的烃运移通道,它由发育在底辟构造内的裂隙和微裂隙组成,可从定性判断、岩心识别、正演模拟以及多技术综合等方面来进行分析。断裂通道主要是发育在底辟构造内的断裂,在底辟之外极少发育,它有多个发育期次。尽管底辟外裂隙通道一般规模较小,但其垂向输运流体的能力不亚于底辟通道和断裂通道。莺歌海盆地近年发现的两个中深层大气田东方13-1、东方13-2都是由这类裂隙通道来连通烃源与有效储层的。更多还原

【Abstract】 By the hand of availab le geology,geophysics and core data,and combining with recent exploration and research,the fissure and microfissure pathways for hydrocarbon migration have been identified in the blurry seismic reflection area of diapiric structure zone in the central diapir zone,Yinggehai Basin.The distribution of those vertical pathways in each diapiric structure is also revealed by using the coherence and 3-D visualization and hollowed-out techniques.The vertical pathways in the study area can be divided into diapir pathway,fault pathway and fissure pathway.The diapir pathway is the most important hydrocarbon migration pathway,which is made up of fissures and microfissures developing within diapir structures.It can be analyzed by using the qualitative judgment,core identification,forward modeling and other integrated technique.The fault pathways commonly are the faults developing within diapir structures,which seldom develop outside diapir structures.They may have several periods of development.Although the fissure pathways outside diapirs are commonly small in scale,they are better in the capacity of vertically migrating fluid than the diapir pathways or fault pathways.Dongfang 13-1 and Dongfang 13-2 are the large mid-deep gas fields discovered in recent years in Yinggehai Basin where the connection of hydrocarbon source with reservoirs just depends on fissure pathways.更多还原