非均质性油藏测井评价新技术及其在南海东部的应用  

New logging evaluation technology for heterogeneous reservoirs and their application in the eastern South China Sea

作　　者：冯进 潘卫国 管耀 石磊 周开金 

机构地区：[1]中海石油(中国)有限公司深圳分公司,广东广州510240

出　　处：《中国海上油气》2015年第3期38-45,共8页China Offshore Oil and Gas

摘　　要：南海东部发现众多不同类型的非均质性油藏,并广泛发育砂泥岩薄互层,常规测井手段难以精确评价非均质性油藏及精细划分薄储层。为此,提出了3种有针对性的测井评价新技术。从孔隙半径和孔喉结构的角度剖析南海东部灰岩油藏的非均质性,采用5M孔隙结构分类技术和储层类型自动识别技术实现了储层类型与测井处理模型的自动匹配,并分类评价了灰岩油藏储层;通过FMI图像合成高分辨率电阻率曲线,分析高、低分辨率曲线在薄层中响应的差异,解决了南海东部砂泥岩薄互层划分难题;储层的物性变化、层内非均质性强导致南海东部中孔砂岩成为盖层,利用毛管压力建立了静态力学关系,实现了砂岩盖层物性封闭能力的定量评价。这些测井评价新技术已经在南海东部众多非均质性油藏中得以应用,取得了良好的效果。Different types of heterogeneous reservoirs were found in the eastern South China Sea, where thin inter-bedded formations were extensively developed. It is difficult to evaluate heterogeneous reservoirs and identify thin bed accurately with conventional logging. To solve these problems, three tailored evalua- tion methods were developed. The heterogeneity of limestone was analyzed based on pore radius and pore throat strueture; automatically matching types of reservoir with interpretation models was realized using 5M pore structure classification technology and reservoir types automatic identification technology by logging curves. The thin layers were detected by comparing the responses of high-resolution and low-resolu- tion resistivity curves, which were synthesized by FMI image. Medium-porosity sandstone caprock is formed in the eastern South China Sea, because of the strong inner heterogeneity. Static mechanical relationships were established based on capillary pressure curves, which can be used to describe the sealing ability of sandstone caprock quantitatively. These techniques have been applied in the eastern South China Sea, and have achieved good results.

关 键 词：非均质性油藏 5M孔隙结构分类 高分辨率测井 中孔砂岩盖层 南海东部 

分 类 号：TE132.14[石油与天然气工程—油气勘探]