Comprehensive study of 15 exploratory wells shows that the Lower Xiaganchaigou Formation have experienced a series of diagenetic evolutions and is in late diagenesis stage (A2) now.

• 通过对砂西区块15口探井的综合研究,认为下干柴沟组下段储集层经历了一系列的成岩演化序列,现今处于晚成岩A2亚期。