建昌地区中新元古界成藏特征探讨

Discussion on Characteristics of Meso-Neoproterozoic Reservoir Occurrence in Jianchang Area

针对中新元古界勘探的难题,通过在建昌地区部署探井,获得良好油气显示,证实中新元古界具备基本油气成藏条件。综合利用露头、二维地震及探井资料,系统评价了该区中新元古界的石油地质条件,认为该区中新元古界海相烃源岩具备生油能力;多期构造运动导致储层裂缝发育,储油性能良好,油气成藏具有自生自储、多期冲注特点。

Aiming at the difficulties in Meso-Neoproterozoic exploration,exploration wells have been deployed in Jianchang area and good oil & gas shows have been obtained,showing that the Meso-Neoproterozoic formation has basic conditions for oil and gas accumulation. By integrated use of outcrops,2D seismic data and exploration well information,the Meso-Neoproterozoic petroleum geology in the area has been systematically assessed,which shows that the Meso-Neoproterozoic marine hydrocarbon source rock in the area had the capability of oil generation; multi-stage tectonic movements had resulted in developed fractures in the reservoirs,providing good properties for oil accumulation,and oil and gas accumulation and occurrence have the features of in-situ generation and accumulation and multi-stage filling.