榆树林油田徐30地区沉积微相研究

徐30区块位于榆树林油田西南部,葡萄花油层是其主要目的层。通过分析取心井的岩心资料和测井相要素,并结合研究区沉积特征,探讨了榆树林油田徐30区块葡萄花油层的沉积微相类型。结果表明,本研究区目的层段具有明显的水下分流河道特征,为三角洲前缘亚相,主要发育水下分流河道、席主体、席状砂、席内缘、席外缘5种微相。进一步分析研究区沉积特征,建立测井微相模式,绘制出9个时间单元平面沉积微相展布图,为徐30区块葡萄花油层的开发提供重要的地质依据,为油水分布规律及剩余油分布规律研究打下基础。

Study on Sedimentary Microfacies of Xu 30 Block in Yushulin Oil Field

Xu 30 block is located in the southwest of Yushulin oil field, Putaohua reservoir is the main reservoir. Based on the analysis of the core information and well logging facies elements, and combined with the sedimentary characteristics of the study area, types of sedimentary microfacies of Xu 30 block in Yushulin oil field were discussed in order to guide the future oil and gas exploration and development. The results show that the target layer in the study area with obvious characteristics of underwater distributary channel is delta front facies, and it can be divided into underwater distributary channel, seat body, sheet sand, the inner front sheet sand and the external delta front sedimentary microfacies. Through further analysis of sedimentary characteristics, logging microfacies models were established, and plane distribution diagrams of 9 time unit sedimentary microfacies were drawn out. This study can offer not only an important geologic evidence for Xu 30 block of Putaohua reservoir, but also a basement for the distribution law of oil, water and the remaining oil.