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在等时对比的基础上对胜南3、6区块中侏罗统三间房组Ⅰ油组进行了沉积相分析,在浅水辫状三角洲前缘亚相中识别出水下分流河道、席状砂(包括溢岸沉积)及浅湖等微相类型。以单井相分析成果为依据,结合测井相平面组合关系及砂体展布图,编制了各层沉积微相平面图。根据各微相砂体特征,提取主力砂体,以中期旋回为单位编制小层主力砂体的叠加图,确定优势储层分布区域,提交A、B、C、D等有利钻探位置。结合油气成藏条件分析,认为B、C井风险最小。
On the basis of isochronism, the sedimentary facies analysis of the Member I of the Middle Jurassic Sanjianfang Formation in Block 3 and Block 6, Shengnan was carried out, and the underwater distributary channel was identified in the shallow braided delta front subfacies Sand (including overflow deposition) and shallow lake microfacies types. Based on the results of single-well facies analysis, the plan of sedimentary microfacies of each layer was compiled according to the combination of logging facies plane and sand body distribution map. According to the characteristics of each micro-facies sand body, the main sand body is extracted, and the overlay diagram of the main sand body of the sub-layer is compiled by medium-term cycle. The distribution area of the superior reservoir is determined and favorable drilling positions such as A, B, C and D are submitted. Combined with the analysis of hydrocarbon accumulation conditions, it is considered that the risks of wells B and C are the least.