Geological-geophysical Model in High Frequency Sequence Framework and Prediction of Sandbody
详细信息
- 责任者：Liu Hao (School of Ocean Sciences ; China University of Geosciences (Beijing) ; Beijing 100083 ; China) ; Zhou Xinhuai
- 刊名：Earth Science Frontiers
- 出版年：2012
- 卷期：19(1)
- 关键词：砂体 ; sand bodies ; 层序划分 ; sequence classification ; 地震勘探 ; seismic exploration ; 渤海湾盆地 ; Bohaiwan Basin
- 页码：p.209-220
- 图表：13 illus., 2 tables, 28 refs.
- 分类号：1600
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
摘要
The Yellow River Mouth Sag is located in the southeastern part of the Bohai Bay Basin,China.The large scale shallow water lacustrine delta developed in Neogene became profitable geologic conditions for the formation of concealed hydrocarbon reservoirs in this area.The authors take the sequence SQ1as an example,totally 10parasequence sets are divided to the sequence SQ1of lower member of Minghuazhen Formation in Block B34of the Yellow River Mouth Sag.Lithologic statistics show that the lithology is dominated by sandstone and mudstone.Thick sandstones are mainly distributed in PSS1and PSS10,while thin-bedded sandstones mainly developed in other parasequence sets.The developing character of sandstones is related with where they are developed in the same sequence.The studies include root mean square(RMS)amplitude in different parasequence sets and well lithology,one-dimensional forward simulation of 7kinds of lithology associations.The results indicate that lithology and its association are correspondent to the amplitude as follows: strong amplitude corresponds to thick sandbodies,weak amplitude corresponds to non-development of sandbodies,and medium amplitude corresponds to a large set of mudstone intercalated with medium-thin-bedded sandstone.The fine description of sandbodies was made taking the PSS1as an example.It is quite difficult to quantitatively identify the thickness of sandstone although the relationship between lithology and amplitude is established.As a result,the thickness of sandstone is qualitatively determined according to the amplitude.