金湖凹陷三河次凹阜二段产能影响因素

Factors influencing the production capacity of the second member of Funing Formation in Sanhe Subsag of Jinhu Sag

金湖凹陷三河次凹主要含油层系为古近系阜宁组阜二段,近年来相继发现H3、H4、H8、H9等含油断块,但始终未得到有效开发。主要问题是由于目前各试采断块油气产能差异较大。为正确合理地评价三河地区产能主要影响因素,根据试油试采资料,结合各井沉积微相、成岩相、孔渗数据等多种参数进行对比研究,认为影响油井产能的因素主要包括沉积微相、成岩相以及储层物性等,研究区内滨浅湖砂坝和弱压实成岩相为最有利的沉积及成岩相带。研究结果对区域下步滚动开发的产能预测具有一定指导意义。

The main oil-bearing layer series in Sanhe Subsag of Jinhu Sag is the second member of the Funing Formation of the Paleozoic System.In recent years,oil-bearing fault blocks such as H3,H4,H8,and H9 have been discovered one after another,but they have never been effectively developed.The main problem is due to the large difference in the oil and gas production capacity of each test block at present.To correctly and reasonably evaluate the main factors influencing the production capacity in the Sanhe area,a comparative study was conducted based on the test oil production data,combined with various parameters such as sedimentary microfacies,diagenetic facies and pore seepage data of each well.It is considered that the factors influencing the production capacity of oil wells mainly include sedimentary micro-phase,diagenetic phase,and reservoir physical properties,etc.,and the beach shallow lake sand bar and weakly compacted diagenetic facies in the study area are the most favorable sedimentary and diagenetic facies belts.The research results have certain guiding significance for the capacity prediction of the next rolling development in the region.