麻阳盆地古生界勘探潜力分析

麻阳盆地是中国石油辽河油田分公司对外登记的第一个新区块。在大量野外工作的基础上,从地层、沉积、储层、生油岩特征入手,综合评价了麻阳盆地石油地质条件。明确了下寒武统海相黑色泥页岩和二叠系碳酸盐岩为烃源岩,前者为气源岩,后者为油源岩;二叠系生屑灰岩和生物礁为最有利的储层。指出二叠系自生自储的组合方式是目前研究区最有利的生储盖组合。初步估算麻阳盆地油气资源量为4.2×108t,有一定勘探潜力。提出位于盆地东侧的二叠系分布区是有利勘探地区,为该区的进一步勘探部署提供了依据。

Analysis on Palaeozoic Exploration Potential of Mayang Basin in Hunan Province

Mayang Basin in Hunan Province is the first block of PetroChina Liaohe Oilfield Company that can be registered by foreign companies. Thepetroleum geological conditions of the basin are comprehensively evaluated from the characteristics of strata, sediments, reservoirs, and source rocks based on carrying out plenty of field work. It is determined that the marine black shale in lower Cambrian and the Permian carbonate are source rocks, among which the former is gas source rock and the latter is oil source rock. Permian bioclastic limestone and bioherm are the most favorable reservoirs. The "self-generation and self-storage" pattern of the Permian is referred to be the best source-reservoir-cap rock combination. It is preliminarily estimated that the oil and gas resources is 420million tons in Mayang Basin, which has great exploration potential. It is proposed that the Permian distribution region east of the basin be favorable for exploration, which lays a basis for further exploration and deployment in this region.