海洋地质前沿2024，Vol.40Issue(10)：85-96,12.DOI:10.16028/j.1009-2722.2023.188
限定性峡谷和非限定性峡谷沉积充填过程模拟
Simulation of sedimentary filling process of confined and unconfined canyons:taking the Area M of Qiongdongnan Basin as an example
薛国庆 1李达 1程琳燕 2彭旋 1付强 1李宁涛3
作者信息
- 1. 中海石油(中国)有限公司海南分公司,海口 570300
- 2. 陕西延长石油(集团)有限责任公司气田公司,延安 716000
- 3. 中国石油华北油田苏里格勘探开发分公司,鄂尔多斯 011500
- 折叠
摘要
Abstract
The changes in the sand-mud ratio and sediment-filling rate in underwater canyon directly affect the geomorphic characteristics of the canyon.Taking the Central Canyon in the Area M of the Qiongdongnan Basin as an example,based on 1 000 km2 of three-dimensional seismic data,the canyon types formed in seven periods in the area were recognized and classified.Software Fluent was used to simulate the characteristics of the filling pro-cess under the conditions of different sand-mud ratios in single-and dual-sourced scenarios.Results show that the canyons that formed in the early stage(T50-T30)are confined canyons,and the those formed in the late stage(T29_1-T29)are unconfined canyons.The channels developed in the confined canyons have strong meandering ability,the superposition of multi-stage channels is obvious,and channel complexes are mostly developed;however,in the unconfined canyons,channels developed are mainly transversely migrated,and then slowly dif-fused into an open area and formed lobe complexes.The simulation and study of the canyon-filling processes in-creased the accuracy of identification of sedimentary units in the canyons,and provided a theoretical basis for the efficiency and the optimization of exploration target areas.关键词
限定性峡谷/非限定性峡谷/朵体/琼东南盆地Key words
confined canyon/unconfined canyon/lobe/Qiongdongnan Basin分类
海洋科学引用本文复制引用
薛国庆,李达,程琳燕,彭旋,付强,李宁涛..限定性峡谷和非限定性峡谷沉积充填过程模拟[J].海洋地质前沿,2024,40(10):85-96,12.
