成像测井资料在涠洲油田砂砾岩沉积相研究中的应用

南海北部湾盆地北部2号带扇三角洲河流相砂砾岩体的特殊性使其沉积相研究面临一定的困难。利用FMI资料进行沉积相研究,通过对地层进行长井段的连续观察和描述,获得丰富的岩性、层理、沉积旋回等重要的岩石结构和构造方面的指相标志,对这些相标志加以岩心刻度及分类以建立该区沉积相研究的FMI图版及沉积微相模式;最后在沉积微相的指导下从分类相标志中选取最能反映古水流特征的水流层理,对该类层理进行构造倾角校正,研究古水流及物源方向。该套方法较好地揭示了涠洲油田扇体各相带沉积特征、空间叠置关系及内部结构。

Application of Imaging Logging Data in Sedimentary Facies Analysis on Glutenite in Weizhou Oilfield

Sedimentary facies analysis on glutenite was a big challenge in Weizhou Oilfield NO. 2 belt sandy conglomeratein fan delta reservoir of northern gulf basin in South China Sea, FMI ( Formation Microresistivity Image ) could be usedto identify accurately the lithofacies, sedimentary structure, rock texture and sedimentary rhythm and other sedimentaryindications for a long interval. Core calibration and classification were used to establish FMI chartboart and indications ofsedimentary microfacies. under the supervision of the micro-facies, current beddings reflecting the palaeocurrent characters are chosen to study palaeocurrent after structural dip is calibrated for the current beddings. The method is used successfully for studying the sedimentary facics. sand-body superimposition and internal structure in the Weizhou Oilfield.