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通过对研究区27口井的测井、录井及实验资料的分析,结合沉积相标志,在单井、连井沉积相分析的基础上,对Z油田A井区三叠系延长组长6~1、长6~2沉积特征进行了详细的研究。结果表明:本区长6~1、长6~2油层组主要为三角洲前缘亚相沉积,沉积微相包括水下分流河道、河口砂坝、分流间湾。研究区砂体以水下分流河道沉积为主,储集性能好,为研究区延长组油气富集的主要场所,通过对砂体展布特征的研究,为下一步的勘探开发提供了依据。
Based on the logging, logging and experimental data analysis of 27 wells in the study area and the sedimentary facies markers, based on the analysis of the sedimentary facies of single well and continuous well, the extension of the Triassic Yanchang Formation in Well A of Z Oilfield ~ 1, long 6 ~ 2 sedimentary characteristics of a detailed study. The results show that the sedimentary microfacies of the 6-1 and 6-2 oil reservoirs in this area are mainly delta front subfacies, and the sedimentary microfacies include underwater distributary channel, estuary sand dam and shunt bay. The sand body of the study area is dominated by underwater distributary channel deposition with good reservoir performance, which is the main site for enrichment of oil and gas in the Yanchang Formation in the study area. The study on the distribution characteristics of sand bodies provides the basis for the further exploration and development.