全球深水区油气资源量丰富且具有巨大的勘探潜力,白云凹陷是南海北部珠江口盆地深水油气勘探的热点区域。在技术和成本条件的约束下,利用成岩相测井响应特征来研究储层的方法是目前海洋油气勘探从浅水走向深水的有效手段之一。通过镜下薄片观察、扫描电镜观察、碳氧同位素等分析测试手段,对白云凹陷北坡中深部储层基本特征、典型成岩作用类型、成岩相组合类型及其测井响应标志进行了分析。研究发现,白云凹陷北坡中深部储层经历的主要成岩作用为压实作用、胶结作用和溶蚀作用,是影响储层物性的关键因素;同时将目的储层划分为强胶结—弱溶蚀相、弱压实—强溶蚀相、中等压实—较强溶蚀相和强压实—弱溶蚀相4种成岩相类型,对成岩相具有较高灵敏度的声波时差、自然伽马以及电阻率曲线的响应特征进行分析,并初步建立了区域性的成岩相测井识别标准。旨在对无取心或者少取心井段开展储层成岩作用的相关研究,为白云凹陷深水区进一步油气勘探提供科学依据和思路借鉴。 The deep-sea oil and gas resources in the world are abundant and have great exploration potential. Baiyun sag is a hot area for deepwater petroleum exploration in the Pearl River Mouth Basin in the northern South China Sea. Under the constraints of technical and cost conditions, the method of studying the reservoir using the logging response characteristics of diagenetic facies is one of the effective measures for offshore oil and gas exploration from shallow water to deep water at present. The basic characteristics of reservoir, typical diagenesis types, diagenetic facies assemblage type and their log responses are analyzed by microscopic observation, scanning electron microscope and carbon-oxygen isotope analysis. It is found that the main diagenesis experienced by the middle and deep reservoirs on the northern slope of Baiyun sag is the key factor that affects the reservoir physical properties. Compaction, cementation and dissolution are the main diagenesis. The reservoirs are divided into strong cementation-weak dissolution phase, Weakly compacted - strongly dissolved facies, moderately compacted - strongly corrosive facies and strongly compacted - weakly erosive facies, and four types of diagenetic facies with high sensitivity to diagenetic facies, natural gamma ray and resistivity curves Characteristics, and initially established a regional diagenetic logging well identification standards. The aim is to study the diagenesis of reservoirs without or with less coring, and to provide a scientific basis and reference for further oil and gas exploration in the deepwater area of ​​Baiyun Sag.