Sharplite薄层处理方法在台南气田的应用

APPLICATION OF SHARPLITE THIN BED PROCESSING METHOD IN TAINAN GAS FIELD

台南气田位于柴达木盆地三湖新拗陷中央凹陷区,地层水矿化度很高,导致储层电阻率很低,而且储层多为砂、泥岩薄互层,由于纵向分辨率的局限性,常规测井曲线无法真实反映砂、泥岩薄互层的地层特征,给油气识别造成很大困难。针对以往的提高测井曲线纵向分辨率的方法侧重理论、可操作性差的实际问题,斯伦贝谢公司提出了Sharplite薄层处理方法,结合高分辨率的FMI图像与常规测井曲线进行反演处理得到高分辨率测井曲线。台南气田的实际应用效果表明,Sharplite处理方法可以大大提高常规曲线的纵向分辨率,有效识别薄层油气。

Tainan gas field is located at the central sag area of Qaidam Basin,Qinghai province,the field is very high in salinity,which results in very low reservoir resistivity,the reservoir rocks are dominated by thinly interbeded sandstone and mudstone.Because of the limitation of vertical resolution,conventional well logging curve can not really demonstrate the interbeded formation characteristics,which makes hydrocarbon recognition more difficult.The existing method improving vertical resolution of well logging curve is more placed on theory and geological data is lacking,the operability is poor.Sharplite thin bed processing method is presented by Schlumberger aiming at the situation mentioned above,high resolution well logging curve is obtained by integrating high resolution FMI images and conventional well logging curve to carry out reverse processing.The application in Tainan gas field shows the sharplite thin bed processing method can greatly improve the vertical resolution of conventional curves so as to effectively identify hydrocarbon in thin beds.