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认识到苏北盆地 BXP地区中段辉绿岩分布广 ,厚度变化大 ,呈多期、多通道侵入特征 ,对下伏地震反射层 T3 1、T3 3 具有很强的屏蔽作用 ,影响其资料品质及构造落实程度 .为了解决这一困扰多年的问题 ,从辉绿岩的形成机理入手 ,结合钻井资料 ,运用各种地质物探等方法 ,对本区辉绿岩的分布、侵入时期与断层组合关系等进行深入研究 ,进而探索辉绿岩与油气形成的复杂关系 .研究表明 :本区辉绿岩的侵入时期晚 ,在加速 E1f2 、E1f4 段生油岩有机质向烃类转化的同时 ,也破坏了早期原生油气藏 ,影响了次生油气藏的形成 ;另外辉绿岩的侵入优化了围岩渗透性 ,导致蚀变带的产生 ,提供了油气的运载体和储集体
It is recognized that the diabase in BXP area of the North Jiangsu Basin is widely distributed and varies widely in thickness with multi-period and multichannel intrusions, which has a strong shielding effect on the underlying seismic reflection T3 1 and T3 3, affecting the quality of data and In order to solve this troublesome problem for many years, this paper starts with the formation mechanism of diabase, combining drilling data with various geological geophysical methods to analyze the distribution of diabase, intrusive period and fault assemblage in this area Depth study and exploration of the complex relationship between diabase and oil and gas formation.The study shows that the late invasion of diabase in this area accelerates the conversion of organic matter to hydrocarbon in the source rocks of E1f2 and E1f4, Reservoirs, affecting the formation of secondary oil and gas reservoirs; in addition diabase invasion to optimize the permeability of the surrounding rock, resulting in the formation of alteration zones, providing oil and gas carriers and reservoirs