Abstract Assessing the geometry, flow dynamics and, petrophysical properties, of a carbonate reservoir has been a key task for a long time, but the challenges presented by these highly heterogeneous rocks seem endless. Geophysical well logs have been, over this time, a very important tool in this type of evaluation. The applications of logs, in the evaluation of the geological formations, range from the estimation of lithology, porosity, permeability and mechanical properties. Commonly, logs are classified as basic or special. The basic logs, used in this work, are the gamma ray, resistivity, density, neutron and sonic. The special ones, utilized in the study, are the acoustic image and the photoelectric logs. From the analysis of the basic logs, the lithologies were identified, the reservoir was delimited and zoned, the fluids and the contact between them were identified and, petrophysical properties, as porosity and water saturation, were estimated. The total porosity was estimated using the empirical relationships from density, neutron and, sonic logs. The identification of the porosity type, such as fractures, vugs etc., although, was determined from the acoustic image borehole wall, as well as different geological structures, such as lithological contacts, inclined layers, natural and induced fractures, besides the identification of caves. The photoelectric log helped to identify the different lithologies, which were compared with those derived from the basic logs. Thus, the main objective of this work was the joint use of the basic and specialized logs, in the characterization of a carbonate reservoir in the Campos Basin, using real data from the post - salt layer. In the end, the advantages and disadvantages, in the usage of these tools, were indicated, as considerably as the applications and care with the occurrence of no geological structures. The joint use of the data and, the adopted methodology proved effective in the characterization of this reservoir.

中文翻译：

---

用于描述巴西东南部坎波斯盆地近海碳酸盐岩储层的基本和专业地球物理测井记录

摘要 长期以来，评估碳酸盐岩储层的几何形状、流动动力学和岩石物理性质一直是一项关键任务，但这些高度非均质岩石带来的挑战似乎无穷无尽。在此期间，地球物理测井一直是此类评估中的一个非常重要的工具。测井在地质构造评价中的应用范围包括岩性、孔隙度、渗透率和力学性质的估计。通常，日志被分类为基本或特殊。这项工作中使用的基本测井是伽马射线、电阻率、密度、中子和声波。研究中使用的特殊图像是声学图像和光电测井仪。通过对基本测井的分析，确定了岩性，对储层进行了划界和分区，确定了流体及其之间的接触，并估计了孔隙度和含水饱和度等岩石物理特性。使用密度、中子和声波测井的经验关系估计总孔隙度。裂缝、孔洞等孔隙类型的识别，除了通过声像井壁，以及不同的地质结构，如岩性接触、斜层、天然和诱导裂缝等，洞穴。光电测井有助于识别不同的岩性，并将其与从基本测井得出的岩性进行比较。因此，这项工作的主要目标是在坎波斯盆地碳酸盐岩储层的表征中联合使用基本和专业测井，使用来自后盐层的真实数据。最后，指出了使用这些工具的优点和缺点，以及在没有地质结构的情况下的应用和注意事项。数据的联合使用和所采用的方法证明在该储层的表征中是有效的。