【摘要】 吉朋松，庄人遴，林谦，等．双晶Ｃ／Ｏ能谱测井．测井技术，１９９７，２１（２）：１３３～１３７单晶Ｃ／Ｏ测井仪由于受井径、井内流体、套管尺寸、水泥环等多种井眼条件的影响，使得测井的灵敏度和分辨能力大为降低，严重影响了单晶Ｃ／Ｏ能谱测井仪的推广使用。双晶Ｃ／Ｏ测井仪则利用长短源距两个探头所测谱数据进行补偿，有效地去除了井眼条件的影响，提高了测量精度和油水差值，更加有效地区分油、水层，并有望能在低孔隙度的地层中使用Ｃ／Ｏ测井仪器。更多还原

【Abstract】 The logging result of single crystal C/O spectral logging instrument (SCCSLI), which uses one detector, is influenced by borehole conditions, such as borehole diameter, fluid type, casing size etc.. These influences reduce the sensitivity and the resolution of SCCSLI, hence, limit the application of the tool. C/O spectral logging instrument with double BGO crystals uses two detectors. One is near detector and the other is far detector. The compensation of the two detectors greatly decreases the influence of borehole conditions and substantially improves the measurement accuracy and differentiation between oil and water. Thus, application of C/O spectral logging tool to low porosity formation is possible.更多还原