加蓬A区块Point Clairette组沉积相研究

Study on the sedimentary facies of the Point Clairette Formation at A Block in Gabon

加蓬A区块位于加蓬共和国河口省,在区域上位于加蓬海岸盆地的北加蓬次盆中部。加蓬A区块勘探程度较低,对于Point Clairette组沉积体系、沉积相的展布等问题有待于进一步认识。该文以岩心、测井曲线为基础,通过对区内岩性特征、测井曲线形态及沉积微相特征进行分析,认为加蓬A区块Point Clairette组主要由三角洲沉积体系和滨浅海沉积体系组成。根据Point Clairette组的沉积相展布及演化规律可以得出研究区的沉积模式。

A block of Gabon is located in Hekou province,Republic of Gabon,which is located in the central of north Gabon sub-basin of Gabon Coastal Basin.Depression.The exploratory degree is low here,thus,the study on depositional system,sedimentary facies distribution of the Point Clairette Formation is not enough.Based on the core and well log data,the lithologic characteristics,well log form and sedimentary microfacies are analyzed.The result shows that the Point Clairette Formation are mainly composed of delta and neritic depositional systems.According to the distribution and evolution rule of the sedimentary microfacies,the depositional model of the study area can be obtained.