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大芦湖油田樊107块沙三段中亚段滑塌浊积砂体纵横向上连通性差、相变快,加大了小层对比的难度。综合地质、测井和地震3方面的资料,运用高分辨率层序地层学等时沉积的观点,建立了适合研究区的精细地层划分与对比方法。首先在区域不整合面识别的基础上,划分了长期基准面旋回;在井震精细标定标志层的基础上,在标志层的控制下,建立了中期基准面旋回等时地层格架;然后结合自旋回、相序递变规律进行短期基准面旋回识别,进而实现了沉积时间单元的划分与对比;最后在沉积时间单元内部结合沉积相研究了单砂体的连通方式。最终将大芦湖油田樊107块沙三段中亚段划分为4,5,6和7共4个砂层组,26个沉积时间单元,识别了5种单砂体连通类型,实现了单砂体的对比。
Dasuhu Oilfield Fan 107 block sand Es3 slump turbidity sand body vertical and horizontal connectivity is poor, rapid phase transition, increasing the difficulty of the small layer contrast. Based on the data of geology, well logging and earthquakes, and using the perspective of isochronous deposition of high resolution sequence stratigraphy, a method of fine stratigraphic division and contrast suitable for the study area was established. Firstly, based on the recognition of regional unconformities, the long-term base-level cycles are divided. Based on the well-calibrated marker layer, a medium-term base-level cycle isochronal stratigraphic framework is established under the control of the marker layer. Spin-back, and phase sequence change rule, so as to realize the division and contrast of sedimentary time units. Finally, the connectivity of single sand body was studied in sedimentary time unit with sedimentary facies. Finally, the middle sub-section of Fan 107 block in Block 3 of the Taihu Lake oilfield is divided into 4 sand beds of 4, 5, 6 and 7 groups and 26 sedimentary time units. Five types of single sand body connectivity are identified, Body contrast.