认清单一河道的分布及河道组合关系对于河流相沉积发育地区的油气勘探、开发井网部署和剩余油挖潜都十分重要。明化镇组是渤海海域油气勘探的重要目的层系,由于河流相沉积非常发育,多期河道相互切割叠置使砂体识别、刻画和连通性分析十分困难。以浅层河道砂体较为发育的渤海X油田为例,建立了一套适合河道边界刻画追踪的高精度相干体切片技术,得到高精度相干体切片,精细刻画出河道展布,同时通过子波分解、负二阶导数技术判别同时期砂体结合部位的连通性,并利用正演模拟印证河道结合部位存在不连通的可能性。经钻井证实研究结论可靠,为研究区勘探井位部署和开发方案编制提供了重要的参考依据。

 Recognizing the distribution of a single channel and the relationship between channels is quite important for hydrocarbon exploration, development of well pattern deployment and tapping the potential of remaining oil in river facies development area. The Minghuazhen formation is an important target layer of hydrocarbon exploration in the Bohai sea area, and the multi-period channel cut and superimposition make it difficult to identify, characterize and analyze the sand-body due to highly developed fluvial sedimentary facies. Taking the Bohai oilfield X with relatively developed sandstone in shallow channel as an example, a set of high-precision coherence slicing techniques for characterizing and tracing of river channels are established, getting the high-precision coherent slices and finely describing the channel distribution. Meanwhile, the connectivity of combining parts of the sandstone in the same period was determined by wavelet decomposition and negative second derivative technology, and the possibility of the disconnectivity of the combining parts of  sandstone by forward modeling was confirmed. It is proved that the conclusion is reliable by drilling and provides important reference for the exploration well deploying and development program preparation in research area.