【摘要】 惠民凹陷南斜坡主要含油层位是沙三、沙四段,由于夏口断层的影响,导致了该区的强分割性,地层对比划分难度大,使用单一的对比划分方法效果差,存在多个地层划分方案。对沙三、沙四段分别采用适合其沉积特点的层序理论,利用"V-C优势法"进行层序精细对比,并通过地震层序、录井岩性、泥岩声波、孢粉化石等多因素相互结合,闭合对比,实现了地层精细等时对比,从而建立了高精度层序地层格架,形成了适合强分割地区地层划分对比的综合方法。更多还原

【Abstract】 Major oil- bearing layers on the southern slope of the Huimin Sag include Sha- 3 and Sha- 4. Due to impacts of the Xiakou Fault,the area is characterized by intensive segmentation. Consequently,stratigraphic correlation is quite difficult. Application of single correlation method may produce poor performances and there are multiple segmentation options for the area. Suitable stratigraphic theories applicable to specific sedimentation features are adopted for Sha- 3 and Sha- 4 respectively. By using"V- C dominance method",fine stratigraphic correlation is performed. In addition,seismic stratigraphic features,lithologic features determined through logging,acoustic waves in mudstone,sporopollen fossile and other factors are combined for enclosed correlation and fine isochronous correlation of the formation. In this way,high resolution stratigraphic framework is constructed to generate comprehensive method for stratigraphic correlation in areas with intensive segementation.更多还原