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1·In order to study the theory of casing damage and reduce the casing damage of oil-water Wells, a new log analysis method of multi-armed caliper log is expounded.

为了深入研究套损机理，减少油水井套管的损坏，提出了新的多臂井径测井解释方法。

2·Gravity log has such advantages as wide investigation range, small effect of caliper variation, short repeated observation cycle, no limit for depth of the interested zone.

重力测井具有探测范围大、受井径变化影响小、重复观测周期短、不受目的层埋深限制等优点。