泥质重力流沉积研究进展及其页岩油气地质意义——以东营凹陷古近系沙河街组三段为例
- 1. 中国石化胜利油田勘探管理中心, 山东东营 257017;
- 2. 山东科技大学地球科学与工程学院, 山东青岛 266590
基金项目:
山东省重大科技创新工程项目（2017CXGC1608）；国家自然科学基金项目（41372135，41672120）；山东科技大学科研团队计划（2015TDJH101）
作者简介:
宋明水,男,1964年生,博士,教授级高工,油田勘探与管理,E-mail:songmingshui.slof@sinopec.com
- 收稿日期:
2016-11-07
- 修回日期:
2017-01-12
- 刊出日期:
2017-08-10
摘要: 页岩油气的勘探开发推动了泥页岩沉积机理研究的快速发展，使得细粒物质的搬运和沉积成为当今沉积学界和油气工业界共同关注的焦点。尽管海洋环境下的泥质重力流沉积研究成果频见报道，但有关我国新生代湖泊环境中的泥质重力流沉积尚未引起沉积学界的关注。故本文在国内外相关文献调研基础上，以岩芯观察和薄片鉴定为重点，分析了渤海湾盆地东营凹陷古近系沙河街组三段湖相泥质重力流沉积特征；探讨了湖相泥质重力流沉积的形成机制；以期为湖泊沉积学研究和陆相页岩油气开发提供参考。研究发现，东营凹陷古近系沙河街组三段发育泥质块体流、泥质碎屑流、泥质浊流及泥质异重流等多种重力流沉积类型；泥质滑塌岩、泥质碎屑岩、泥质浊积岩和泥质异重岩在时空上可以共生共存。认为泥质沉积物可以在动荡水体和较强水动力条件下沉淀；泥质重力流沉积在深水沉积区占有重要地位；泥质重力流对于泥页岩中的粗粒碎屑物质、有机质的搬运和沉积以及有机质的埋藏起到重要作用，因而具有重要的非常规油气地质意义。
Research Progresses on Muddy Gravity Flow Deposits and Their Significances on Shale Oil and Gas: A case study from the 3rd oil-member of the Paleogene Shahejie Formation in the Dongying Sag
- 1. Exploration Management Center, Shengli Oilfield Company, SINOPEC, Dongying, Shandong 257017, China;
- 2. College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China
Funds:
Major Scientific and Technological Innovation Project of Shandong Province, No.2017CXGC1608; National Natural Science Foundation of China, No.41372135, 41672120; SDUST Research Fund, No. 2015TDJH101
- Received Date:
2016-11-07
- Rev Recd Date:
2017-01-12
- Publish Date:
2017-08-10
Abstract: With promotion of shale oil and gas development on intensive studies on depositional mechanisms of mudstone and shales, transportation and deposition of fine-grained sediment have currently become hot topics in both sedimentoligical studies and petroleum industries. However, muddy gravity flow deposits in the Cenozoic lacustrine environment have not yet arisen attentions of geologists, although literatures of gravity flow-generated muddy deposits in marine environments extensively existed. Based on extensive literature researches, detailed core examinations and thin section observations, this paper analyzes characteristics of gravity flow-generated fine-grained deposits in the 3rd oil-member of the Paleogene Shahejie Formation (E2s3), Dongying Sag, Bohai Bay Basin. Discussions on their forming mechanisms have theoretical significances on lacustrine sedimentary environment study and have practical meanings on developments of shale oil and gas. Results: 1) there are various gravity flow deposits, including muddy mass flows, muddy debris flows, muddy turbidity currents and muddy hyperpycnal flows exist in E2s3 in the Dongying Sag; 2) muddy slumps, muddy debrites, muddy turbidites and muddy hyperpycnites co-generate and co-exist in spatio-temporal extents. Conclusions: 1) muddy sediments can deposit in turbulent waterbody and high hydrodynamic conditions; 2) muddy gravity flow deposits play an important role in deep water sedimentary regions; 3) muddy gravity flows are of great importance to transportation and deposition of coarse grains and organic matters, and so to preservation of organic matters; 4) muddy gravity flow deposits have important geological significances on unconventional oil and gas.
宋明水, 向奎, 张宇, 蔡攀, 刘建磊, 杨仁超. 泥质重力流沉积研究进展及其页岩油气地质意义——以东营凹陷古近系沙河街组三段为例[J]. 沉积学报, 2017, 35(4): 740-751. doi: 10.14027/j.cnki.cjxb.2017.04.008
SONG MingShui, XIANG Kui, ZHANG Yu, CAI Pan, LIU JianLei, YANG RenChao. Research Progresses on Muddy Gravity Flow Deposits and Their Significances on Shale Oil and Gas: A case study from the 3rd oil-member of the Paleogene Shahejie Formation in the Dongying Sag[J]. Acta Sedimentologica Sinica, 2017, 35(4): 740-751. doi: 10.14027/j.cnki.cjxb.2017.04.008
| Citation: |
SONG MingShui, XIANG Kui, ZHANG Yu, CAI Pan, LIU JianLei, YANG RenChao. Research Progresses on Muddy Gravity Flow Deposits and Their Significances on Shale Oil and Gas: A case study from the 3rd oil-member of the Paleogene Shahejie Formation in the Dongying Sag[J]. Acta Sedimentologica Sinica, 2017, 35(4): 740-751. doi: 10.14027/j.cnki.cjxb.2017.04.008
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