马六甲合同区油源和气源对比研究

Oil and gas source rock correlation in Malacca Strait Contract Area, Indonesia

主要应用碳同位素法、组分组成法和生物标志物方法,对马六甲合同区的油气源进行了对比研究,确定了研究区的原油来源于淡水-微咸水的半深湖-深湖相沉积环境,母质类型为Ⅱ型,原油成熟度较高,为成熟-高熟,原油应来自Bengkalis凹陷内的Brown Shale组湖相页岩;区内的天然气为油型气,来源于淡水-微咸水沉积环境,为原油和凝析油伴生气,同样来源于Bengkalis凹陷内的Brown Shale组湖相暗色页岩。

After near 3 decades of exploitation, the remaining reserves of the oilfields in Malacca Strait Contract Area were running out. In order to get the information of the exploration potential of the Contract Area, detailed research on the oil and source rock correlation was carried out. Some effective correlation methods were applied in the research, such as carbon isotopic composition, component analysis and biomarker methods. Through the correlation, the source of the oil and gas was defined and considered to be isogenous, generating from the lacustrine facies dark mudstone of the Brown Shale Formation in the Bengkalis Sag.