苏北盆地海安地区戴南组岩性油气藏成藏规律研究

在岩性油气藏勘探中,准确预测砂体及分析成藏规律是寻找油气藏的关键。海安地区戴南组地层岩性油气藏比较发育。从生、储、盖三方面分析了戴南组地层的成藏条件,结合地震资料、钻井情况、波阻抗反演,对研究区的成藏规律进行了研究。海安地区岩性油气藏具有近油源、富砂体、占高点的特点。研究区岩性油气藏主要是砂岩上倾尖灭成藏,油气通过断层和砂体运移,在构造高部位聚集,而低部位砂体仅作为油气运移通道。这为海安地区岩性油气藏钻探指引了方向。

The study of lithology oil reservoir pattern of DaiNan formation in HaiAn area SuBei basin

In lithology oil reservoir exploration,key point of seeking reservoir is to predict sand accurately and analyse reservoir pattern.In DaiNan formation of HaiAn area,lithology reservoir is widely developed.This paper demonstrates the conditions of reservoir in DaiNan formation from three aspects,generation,storage and seal,combining seismic data,drilling information,and acoustic impedance inversion,the pattern of reservoir is found out.The lithology reservoir in this study area has the characteristics of near source rock,sand rich and heigh position.The lithology reservoirs mainly are top updip reservoir,oil and gas migrate through faults and sands,and accumulate in the heigh position of the structure.The downdip lower sands are only pathway of oil and gas.This pattern gives the direction of lithology reservoir prospecting in HaiAn area.