海洋地质前沿2026，Vol.42Issue(1)：25-39,15.DOI:10.16028/j.1009-2722.2024.269
河湖交互背景下有利岩性区带半定量优选评价
Semi-quantitative optimal evaluation of favorable lithological zones under the background of river-lake interaction:a case of the SQ3 sequence of the Huagang Formation in the Middle-South of Xihu Depression
摘要
Abstract
In recent years,significant breakthroughs have been made in the structural lithological composite trap of oil and gas in the Xihu Depression,and the exploration focus on one of its main oil and gas enrichment layers,the Huagang Formation,has gradually shifted towards lithological exploration.However,the exploration targets for the lithology of the Huagang Formation are currently unclear.We analyzed the sedimentary characteristics of the SQ3 sequence of the Huagang Formation in the Middle-South of Xihu Depression.On the basis of clarifying the distribution of sedimentary facies zones,a semi-quantitative method of grid division was used to evaluate the development potential of lithological targets,identify favorable development areas of sand body,search for favor-able lithological bodies,and provide new method for finding lithological targets in the future.It is suggests that:① The sedimentary facies of the SQ3 sequence developed mainly river facies,shallow water delta facies,and shallow lake facies,showing obvious alternation in both horizontal and vertical directions from river-dominated facies,river-lake interactive facies,to lake-dominated facies.② Based on existing drilling statistic data,se-quences of sedimentary,structural,and lithological parameters affecting lithological targets and oil and gas injec-tion were established,and a set of multi-dimensional semi-quantitative evaluation methods for the selection of op-timal favorable zones in the Middle-South of Xihu Depression was established using grid unit structure sedimenta-tion.③ The distribution of key areas and dominant sedimentary facies were identified as the delta front compos-ite sand bars,river channel composite sand bars,and estuary bars.关键词
河湖交互体系/半定量评价/岩性区带/花港组/西湖凹陷Key words
river lake interaction system/semi quantitative evaluation/lithological zone/Huagang Formation/Xihu Depression分类
海洋科学引用本文复制引用
姜雪,秦兰芝,肖晓光,刘桐,耿慧..河湖交互背景下有利岩性区带半定量优选评价[J].海洋地质前沿,2026,42(1):25-39,15.基金项目
中海石油(中国)有限公司科研项目"西湖凹陷中成岩B期-晚成岩期储层甜点成因及分布预测"(202516972241) （中国）
