The well spacing in development area is from 500 ～600 meters in junior development phase to 100 meters even dozens of meters with the growth in oil exploration.The infill well pattern makes it possible to regain primitive distributing feature of sand bodies.By detailed core observation and description , and applying well logging and every geologic information, research on sedimentary environment and sedimentary feature in research area is makes careful; It also makes detailed dissection on large scale overlap channels of Putaohua Reservoir of Saertu Oilfield in Songliao Basin.It puts up sedimentary feature , recognition method and sedimentary model about large scale overlap channel sand bodies.So it offers reference for the dissection of large scale overlap channel sand bodies in other districts and it also offers important theoretical basis for exploiting the remaining oil in sand bodies in large scale overlap channels.%随着开发的深入,开发区井距由开发初期的500-600m,缩小到目前的一百米甚至几十米.加密的井网为恢复砂体原始的空间展布特征成为可能.通过详细地岩心观察和描述,利用密井网开发区的测井、录井及各种地质资料,对研究区目的层段的沉积环境、沉积特征进行了精细研究.认为松辽盆地萨尔图油田葡萄花油层为大型复合河道砂体.通过对100O多口井的详细解剖,提出了大型复合河道砂体的识别方法、沉积特征及沉积模式,为其它地区大型复合河道砂体的解剖提供参考,为大型复合河道砂体内剩余油挖潜提供重要的理论依据.
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