We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
海陆过渡相三角洲沉积体系陆源有机质沉积特征 及其影响因素的模拟实验研究
- Authors
刘海; 徐耀辉; 李阳; 黄凌松; 吕奇奇; 刘忠保
- Abstract
[Objective] Owing to favorable hydrocarbon accumulation conditions, terrigenous marine source rocks are widely developed in the transitional facies delta sedimentary system, and terrigenous organic matter is the main source material. To investigate the sedimentary characteristics and influencing factors of terrigenous organic matter in the transitional deltaic sedimentary system, a simulation experiment of terrigenous organic matter deposition was conducted.[Methods] The dynamic quantitative characterization of terrigenous organic matter transport and deposition process under experimental conditions was realized using a carbon and sulfur analyzer to detect total organic carbon content with three-dimensional( 3D) laser scanning technology[. Results]( 1) In the delta plain, terrigenous organic matter mainly accumulates locally in the overflow areas of river channels, abandoned river channels, and the flow surface behind sandbar. In the profile, the distribution of terrigenous organic matter is mainly lens, discontinuous, and interbedded type. In the delta front and fore delta, the organic matter is distributed in a sheet on the plane, and it is distributed in strips with large thickness in the profile. (2) The transport distance of terrigenous organic matter in the gentle slope delta system is relatively long. With the gradual increase of the sediment thickness of the delta, the influence of the initial slope of the delta on the transport distance of terrigenous organic matter has decreased. (3) Hydrodynamic strength and waves are important factors affecting the transport distance of organic matter. The weaker the hydrodynamic force, the more favorable the deposition of organic matter is. Waves prevent organic matter from moving forward and form multiple sand bars in the delta front. Organic matter is deposited in annular bands in the grooves between the bars.( 4) In the transitional facies delta depositional system, the organic carbon content gradually increases from the delta plain to the delta front-pre-delta area and then decreases as the transport distance continues to increase.[Conclusion] The enrichment sites and influencing factors of terrigenous organic matter has been deeply established, and the sedimentary model of terrigenous organic matter in the flume experiment model provides an important reference for oil and gas exploration and development in the transitional facies delta depositional system.
- Publication
Acta Sedimentologica Sinica, 2024, Vol 42, Issue 1, p251
- ISSN
1000-0550
- Publication type
Article
- DOI
10.14027/j.issn.1000-0550.2023.047