测井新技术在广安地区须家河组储层评价中的应用

四川盆地广安地区上三叠统须家河组储层主要集中在须六段和须四段，属陆相沉积的碎屑岩，常规测井曲线在砂岩粒度及储层类别识别过程中存在难度，解释具不确定性。为此，通过成像、阵列声波、阵列感应等测井新技术的应用，大大提高了裂缝识别及砂岩粒度判别能力，从而提高了该区须家河组储层测井评价效果及测井解释成功率。通过对几个实例的阐述，证明了测井新技术在四川广安须家河组储层的裂缝识别和粒度判别中应用得非常成功。

NEW LOGGING TECHNIQUES USED IN EVALUATION ON XUJIAHE GROUP RESERVOIRS IN GUANG'AN AREA

The Upper Triassic Xujiahe Group gas reservoirs, continental deposited clastic rocks, are mainly distributed in T3x6 and T3x4 of Guang'an Formation in Sichuan Basin. Porosity reservoirs are dominated in T3x6, while fracture porosity reservoirs in T3x4. There is difficulty in identifying the size of sandstone grain and the reservoirs types by use of normal logging curve, with uncertain interpretation. Through application of new logging techniques, such as image formation, array sonic, and array induction, to improve the ability of fractures identification and sandstones grain size differentiation, the logging evaluation effect and interpretation success ratio in the Xujiahe Group reservoirs in this area have been enhanced to a high level. After explaining in detail by a few examples, these new logging techniques have been proved to be practical and helpful in fractures identification and grain size differentiation of the Xujiahe Group reservoirs in Guang'an formation of Sichuan Basin.