A New Method to Calculate Sedimentary Rates Based on Milankovitch Cycles: A Case Study on Middle Section of 3rd Member of Shahejie Formation in Well Niu38, Dongying Sag, Bohai Bay Basin
摘要
Based on regional stratigraphic framework, combined with seismic,core and logging data, the Dongying delta was divided into 9 periods named Z1-Z9. According to the sliding window spectrum analysis, the sedimentary rates of the target interval first increased and then decreased as time went by. The sedimentary rate of Z4 reached the maximum (0.127 m/ka) during the most prosperous period of delta prograding. Finally, the duration of each period and more accurate geological age of the interfaces were calculated on the basis of sedimentary rates.