PL油田花岗岩潜山储层裂缝发育特征厘定
Determination of Fracture Development Characteristics of Granite Buried Hill Reservoir in PL Oilfield
摘要: PL油田是近年来中国近海首次发现的一个以中生代花岗岩潜山风化壳为储层的大型油气田。在花岗岩潜山这个新的开发领域，储层特征的认知是制约高效开发的关键。PL油田中生界储层以裂缝孔隙型为主，与裂缝直接相关的储层占总储层的85%。针对PL油田潜山裂缝特征研究，开展野外露头调研，岩心观察描述，测井资料描述以及铸体薄片描述等多尺度的裂缝描述手段，明确裂缝的发育特征。基于精细薄片鉴定进行裂缝发育规律研究，开展裂缝类型及主要特征，裂缝发育程度、影响因素及空间分布规律研究等工作。结合荧光薄片荧光显示级别以及铸体薄片铸体充填情况统计结果确定了花岗岩裂缝宽度与油气渗流特征之间的关系。为后续开发奠定了基础。
Abstract: PL oilfield has been the first large-scale field found in weathering crust reservoirs of the Mesozoic buried granite hills in coast waters of China in recent years. In this brand new area of development, reservoir characterization is considered essential for efficient and successful development. The Mesozoic reservoirs in PL oilfield are mainly of fracture-porosity type. The reservoirs directly related to fractures accounts for 85% of the total reservoir. Aiming at the study of fracture characteristics of buried hill in PL oilfield, field outcrop investigation, core observation description, logging data description, casting thin section description and other methods are carried out to clarify the fracture development characteristics. Based on the fine slice identification, the fracture development law was studied, and the fracture types and main characteristics, the fracture development degree, influencing factors and spatial distribution law were studied. The relationship between the width of granite fracture and the characteristics of oil and gas seepage was determined by combining the statistical results of the fluorescence display grade of the thin section and the filling of the thin section casting. The study in this paper laid the foundation for further development.
文章引用：汤婧, 宋来明, 梁旭, 牛涛, 聂妍. PL油田花岗岩潜山储层裂缝发育特征厘定[J]. 地球科学前沿, 2019, 9(11): 1175-1191. https://doi.org/10.12677/AG.2019.911124

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