宝岛23-1构造生物礁地质评价

宝岛 2 3- 1构造生物礁 (115 8礁 )位于珠江口盆地神狐隆起南缘一个四面封闭的块状碳酸盐台地上 ,礁体顶面 T5 2 层 (珠江口二段下部顶面 )的圈闭面积为 80 km2 。综合分析地震、测井、岩石化学、古生物、岩心等资料 ,证明神狐隆起南缘存在碳酸盐岩台地边缘礁。据生物礁的发育特征和产状 ,宝岛 2 3- 1- 1井钻在礁滩相部位 ,储集性较好的礁核位于宝岛 2 3- 1构造的南高点。南高点的含油面积为 2 2 km2 ,圈闭资源量为 5 32 0万 m3,因此是值得钻探的目标。

REEF GEOLOGY OF BAODAO 23-1 STRUCTURE

The reef of Baodao 23 1 structure(Reef 1158) is located in an enclosed carbonate platform along the south margin of Shenhu Uplift,Pearl River Mouth Basin,and its top T32 horizon (the lower top of Member 2,Pearl River Formation) has a trap area of 80km 2.A comprehensive analysis of available data (seismic,logging,lithochemistry,paleontology and drill core) has indicated that some platform rim reefs may develop along the south margin of Shenhu Uplift.Baodao 23 1 1 well has penetrated a reef flat facies in terms of reef development and occurance,and a reef core with better reservoir properties is at the south high of Baodao 23 1 structure.The south high is a favorable drilling target because it is 22km 2 in oil bearing area and 53.2 million m 3 in trapped resources.