缅甸某区块上上新统沉积演化及油气勘探意义

Sedimentary evolution and petroleum exploration significance of upper Pliocene in one exploration block of Myanmar

为评价研究区的油气勘探潜力,指明下一步油气勘探方向,结合区域地质背景,运用层序地层学、地震相分析等技术,对研究区沉积相与沉积演化进行分析,并阐述了其油气地质条件与勘探方向。结果表明,研究区上上新统沉积相类型以三角洲沉积为主,该时期经历了海侵-海退的变化,沉积层序表现为多期的前三角洲—三角洲前缘叠合体。沉积特征决定了该区上上新统生储盖组合配置良好,同时新构造运动有利于多种圈闭的发育。该区油气成藏条件较好,具有广阔的勘探前景。

In order to appraise the petroleum exploration potential and indicate the direction for further explo- ration in the area, the authors analyzed the sedimentary facies and sedimentary evolution and elaborated the petrole- um geological conditions and exploration direction using the methods of sequence stratigraphy and seismic facies combined with the regional geologic background. The result showed that the sedimentary facies was delta mainly, and the sedimentary evolution experienced transgression-dereliction in upper Plioeene of this area. The sedimentary sequence showed superimposed predelta-delta front sediments. These depositional characteristics may lead to good source-reservoir-cap assemblage in this area, and the neotectonic activity is favorable to develop various traps. Therefore, this area is good in hydrocarbon accumulation conditions with great exploration potential.