华北采育地区砾岩储层测井解释技术探讨

Discussion of Logging Interpretation Technology for Conglomerate Reservoir in Caiyu Area of North China

受常规电法测井自身测量原理的局限,利用电阻率曲线在致密砾岩储层进行油水层的识别一直是测井解释中的一个难点问题。测井评价的关键是准确划分裂缝层段,有效识别溶蚀孔洞,在此基础上再结合气测、录井等第一手资料进行油水层综合评价。该文通过对华北采育地区致密砾岩体储层基本特征和电性特征的深入研究,找出了一套适合于该地区的储层参数计算方法,通过引入储层结构参数、次生孔隙指示参数等多个指示参数对砾岩体储层进行精细的描述,其成果已应用于储量计算及油田开发中。

Use of the resistivity curve for identification of oil and gas water beds in the compact conglomerate reservoir is always a headache in logging interpretation owing to the limitation of the measuring principle of conventional electric logging method. The key to logging assessment is division of the fracture section and level and effective identification of dissolved pores and cavities. Integrated assessment is made on the oil and water beds with the help of the first-hand data like gas testing and logging. This article makes in-depth study of the basic characteristics and electric characteristics of the compact conglomerate reservoirs in Caiyu Area of North China in the attempt to find a set of methods for calculation of the reservoir parameters suitable for this area. With introduction of some indicator parameters like reservoir structural parameters and secondary pore indicator parameters, accurate description is made on the conglomerate reservoir. The results of the study have been applied to the reserves calculation and oil field development.