Method of identifying unconformity by using logging data

Now, dip-logging data is used to identify unconformity in China. However, this technique is not available where the dip-logging data is lack or the research object is parallel unconformity. Therefore, the method of unconformity identification by logging geology was probed. The principles of the method are as follows: Based on the abrupt changes of geological characteristics from overlying and underlying formations of the interfaces multi-analysis was adopted to identify unconformity, such as using logging facies to analyze sedimentary events using shale sonic logging data to analyze the difference between compaction and diagenesis, and using the identify of residual sediment rhythm and formation correlation to judge the denudation on unconformity. The actual application shows that the logging geology can effectively identify unconformity, especially suitable to the area lack of dip logging data.