苏里格地层划分与对比研究

苏里格气田是目前发现中国陆上最大的整装气田,是典型的"六低"气田。储层具有典型的辫状河沉积特征。苏里格庙地区是上、下古生界两套含气层系叠合发育区。山1段～盒8段为开发目的层,为一套河流相砂泥岩沉积。砂岩发育,砂地比高,地层总沉积厚度约100 m。岩性主要为灰色、灰白色含砾粗砂岩、不等粒砂岩与绿灰色、紫红色泥岩不等厚互层。通过反复对比识别出3个中期基准面旋回界面,其标志明显在全区分布比较稳定。根据以上研究成果,结合岩电特征和旋回组合,将目的层段划分盒8上、盒8下、山1三个层段,细分为9个小层。

Stratigraphic division and correlation of Sulige

sulige was the largest land-based Mono-block gas field in China,is typical of the "six low" gas field.Reservoir has a typical braided river sedimentation characteristics.Suligemiao area is the upper-lower Paleozoic composite development area with two sets of gas system.shan1-he8 is the target zone,as a fluvial sand and shale deposits.Development of sandstone,high sandstone stratigraphy ratio,the total deposition of stratigraphic thickness of about 100 m,the major lithology is different thickness interlayerd bedding with gray-grayish white gravel Grit stone,unequal particle diameters sandstone with green ash-purie Lark mudstone.After comparison over and over,identified 3 medium-term base-level cycle interface.The Symbol is in evidence,distributional stability in the area.Based on the above results,combined with rock characteristics and cycle combination,the target zone is divided into 3 section,Upper he8,Lower he8 and shan1,subdivided into 9 small layer.