增生楔盆地烃源岩特征综合评价--以缅甸某区块为例

Source rock evaluation of accretionary wedge basin:A case study of a block in Myanmar

摘要: 从缅甸某区块已钻井和手工顿钻井的有机质丰度、类型及热演化分析,该区具有一定的生烃能力。基于钻井的有机碳( TOC)、热解生烃潜力( S2)、氯仿沥青“A”、总烃( HC)、镜质体反射率( Ro )等测试化验,对研究区的两套主要烃源岩———始新统和中新统的泥、页岩进行评价,认为主力烃源岩为中—下始新统,上始新统—中中新统组为低—中等丰度烃源岩;有机质类型主要为Ⅱ2-Ⅲ型,南部生气、北部生油;有机质热演化达到低熟—成熟阶段,南部热演化程度高于北部。综合分析认为研究区具有较好的烃源潜力。

Abstract: Based on an analysis of the abundance, type and thermal evolution of the organic matter from wells and cable drilling data of a block in Myanmar, the authors have revealed that the study area has certain hydrocarbon generating potential. The evaluation of 2 source rocks of the Oligocene and Miocene shale by using TOC, S2 , chloroform asphalt "A", Tmax and Ro test data shows that the main source rock is Lower?Middle Oligocene, whereas middle?upper layer of Oligocene has low?middle organic abundance source rock.