羊二庄油田二断块NgI3小层低阻油层识别

Identification of Low Resistivity Reservoir for NgI3 Member in the Second Fault Block of Yang-Erzhuang Oilfield

在精细地层对比的基础上 ,细分目的层段。利用 40多口井的测井数据 ,建立了纯水层以及NgI3潜力层的“RT -RXO”与“RT -AC”关系图版 ,消除了钻井液侵入对冲洗带电阻率和地层电阻率的影响 ,并以此为油层复查的标准 ,识别出 3个潜力层。经补孔证实 ,消除钻井液侵入的影响可以识别出电阻率值在 3Ω·m以上的薄油层。

Based on deatiled formation correction,formation was subdivided.Meanwhile,applying 40 plus well logging data,the RT-RXO crossplot and RT-AC crossplot of water-bearing bed and NgI3 potential formation as well were built up,in order to eliminate mud-invasion influence on washing-zone resistivity and formation resistivity.Using these crossplots as criteria of reservoir reidentification,three potential oil-bearing beds were identified.Production test have proved that thin oil beds with resistivity higher than 3Ω·m can be identified by eliminating the affects of mud-invasion.