摘要
珠江口盆地东沙隆起珠江组灰岩储层储集空间主要为孔隙和裂缝,孔隙以次生溶蚀孔隙为主;裂缝主要包括构造裂缝、压溶裂缝和溶蚀裂缝。珠江组灰岩储层储集性能主要受高位体系域及其四级海退半旋回、沉积作用和成岩作用的控制,沉积作用占主导地位。其中台缘堡礁、台内点礁物性最好,生屑滩次之,斜坡塔礁、台坪物性较差。高位体系域及其四级海退半旋回对储层发育的影响主要是沉积物暴露遭受大气淡水淋滤溶蚀对储层的改造作用。成岩作用对储集物性的影响受沉积作用和高位体系域及其四级海退半旋回的控制,对珠江组灰岩储层具显著影响的成岩作用是溶蚀作用、胶结作用等。东沙隆起珠江组最有利灰岩储层为藻屑、生屑灰岩发育的礁滩相。
The main limestone reservoir spaces of Zhujiang formation of Dongsha uplift in Pearl River Mouth Ba- sin are pores and fractures, among which secondary solution pores is of dominance ; fractures mainly contain struc- tural fractures, press-solution fractures and corrosion fractures. The reservoir physical property of limestone in Zhu- jiang formation is mainly controlled by highstand systems tract（HST） and its level-4 regressive hemicycle ,diagenesis and sedimentation which has the predominance. Among the reservoirs, physical property of the barrier reef of plat- form margin and patch reefs inside platforms is the best , followed by bioclasticbeach, slope pinnacles and plate have the poorest physical property. The HST and its level-4 regressive hemicycle can affect the development of res- ervoir development rely on sediment exposure which suffered meteoric leaching dissolution reservoirs trans- formed. The influence of diagenesis on reservoir physical property is controlled by sedimentation, HST and its level- 4 regressive hemicycle. Diagenesis which have a significant impact on Zhujiang formation are dissolution, cementa- tion and so on. The favorable limestone reservoir of Zhujiang formation in Doingsha Massif is the reef and shoal faci- es which develop algal debris and bioclastic limestone
出处
《科学技术与工程》
北大核心
2013年第31期9287-9293,共7页
Science Technology and Engineering
基金
国家科技重大专项(2008ZX05025)资助
关键词
珠江口盆地
东沙隆起
珠江组
储集空间
特征
控制
pear river mouth basin dongsha uplift zhujiang formation reservoir spaces charac-teristic control factors
