摘要
为了明确南堡凹陷油气成藏的地质条件,在油气藏类型及分布规律研究的基础上,通过油藏解剖、地化资料分析、断裂活动期次、烃源岩排烃期、盖层识别和砂地比分析等,利用成藏条件综合分析方法,对烃源岩、断裂、盖层、储层和构造部位5个方面的地质条件进行了详细分析,厘定了南堡凹陷油气成藏的有利地质条件及相互关系。结果表明,南堡凹陷的油气成藏具有5个有利地质条件:①2套烃源岩为油气运聚提供充足来源;②油源断裂为油气运移提供输导通道;③3套区域性盖层为油气聚集提供保存条件;④高砂地比地层为油气聚集提供储集空间;⑤油源断裂附近的正向构造为油气聚集提供有利部位。
Nanpu depression is one of the main oil-producing region in Huanghua depression, oil and gas reservoirs in this depression must be of favorable reservoir forming conditions. This paper applies reservoir anatomy, geochemical data analysis, fault activity periods, source rock hydrocarbon expulsion period, caprock identification and sand and stratum ratio analysis and other measures, uses the reservoir conditions of comprehensive analysis method to study in detail and analyze the source rock, caprock, fracture, reservoir and structural position in 5 aspects in terms of geological condition, we clearly determined hydrocarbon accumulation conditions and their relationship in Nanpu depression. It is considered that there are five favorable geological conditions for oil and gas accumulation in Nanpu depression: ① two source rocks whose thickness is high and the distribution is wide so as to provide adequate oil and gas for migration and accumulation; ②two source rocks provide transporting pathways for oil and gas to migrate; ③three regional caprocks provide sealing for oil and gas to accumulate; ④strata with high ratio between sand stone and stratum so as to provide reservoir space for oil and gas to accumulate; ⑤positive structures near faults connected source rock so as to provide favorable places for oil and gas to accumulate. Through the study of this paper, it will be enriched hydrocarbon accumulation in Nanpu depression, and provides a new thought for next exploration of oil and gas. The result of this study offers important significance to guide the oil-gas exploration in depression basin.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2013年第3期1-4,111,共4页
Petroleum Geology and Recovery Efficiency
基金
国家油气重大专项"我国大气田盖层综合定量评价方法及应用"(2011ZX05007-002)
关键词
油气成藏
有利地质条件
油源断裂
烃源岩
盖层
正向构造
南堡凹陷
oil accumulation
favorable geological conditions
oil source fault
source rock
caprock
positive structures
Nanpu depression
