珠江口盆地珠江组流花生物礁及储层特征

珠江组流花生物礁位于珠江口盆地东沙隆起带上,主要由红藻石粘结礁灰岩、珊瑚骨架礁灰岩、礁角砾灰岩和生物屑灰岩组成。可划分为礁核、礁基、礁坪和礁前塌积等亚相和微相类型,属台地边缘丘状生物礁沉积,并以礁核微相的礁灰岩为最有利储层发育,次为礁基和礁坪滩微相的生物屑灰岩。该生物礁有效储集空间主要为生物骨架孔、原生粒间孔,次为各类溶孔,其储集性能主要受沉积微相和成岩作用控制。

Liuhua organic reef and reservoir characteristics of Zhujiang Formation in Pearl River Mouth Basin

Liuhua organic reef of Zhujiang Formation is located in the tertiary structure named Dongsha uplift which lies in Pearl River Mouth Basin.It is composed of rhodolite reef limestone,coralline framework reef,reef brecciola and bioclastic limestone.It can be divided into four types of intrafacies and microfacies,including reef core,reef base,reef flat and reef front.It possesses the sedimentation model of platform edge moundy organic reef.The effectively accumulation spaces mainly are organic framework,primary intergranular pores,followed by different dissolved pores.The reservoir behavior is controlled by sedimentary microfacies and diagenesis.The reef limestone of reef core microfacies is most favorable for the reservoir development,followed by bioclastic limestones of core base and reef flat microfacies.