| 摘要: |
| 基于川东-渝北地区重要剖面、钻井资料和地震相分析,结合岩石薄片鉴定以及古生物、岩石学等沉积相标志,对川东-渝北地区上二叠统长兴组-下三叠统飞仙关组的礁(滩)、滩组合规律及控制因素进行详细解剖。结果表明,研究区可以划分为完整礁滩组合和不完整的礁滩组合两种类型,进一步将此两种组合类型分别细分为5种次级组合类型,其中完整的长兴组礁(滩)+飞仙关组滩组合类型更具储集意义,尤以长兴组台缘礁+飞仙关组台缘滩组合在礁顶、滩顶白云石化作用最强烈,储层最为发育。礁滩组合发育类型往往受沉积环境演化、海平面升降、古构造等因素的控制。 |
| 关键词: 川东-渝北地区 长兴组 飞仙关组 礁滩组合 控制因素 |
| DOI：10.3969/j.issn.1673-5005.2019.03.003 |
| 分类号::P 618.13 |
| 文献标识码:A |
| 基金项目:“十三五”国家科技重大专项(2016ZX05007002);长江青年人才基金项目(2015cqr09) |
|
| Combination regularities of reef-beach and main controlling factors in Changxing-Feixianguan Formation of eastern Sichuan-northern Chongqing area |
|
HU Zhonggui1, DONG Qingmin1, LI Shilin2, SU Nan3, ZUO Mingtao1, QIN Peng1
|
|
(1.Sedimentary Basin Research Center, Yangtze University, Wuhan 430100, China;2.Chongqing Gas District, Southwest Oil and Gas Field Company Limited, PetroChina, Chongqing 400021;3.Research Institute of Petroleum Exploration ＆ Development, PetroChina, Beijing 100083)
|
| Abstract: |
| Based on the analyses of important profile, drilling data and seismic facies of the eastern Sichuan-northern Chongqing area, and by combining with the identification of rock thin sections and the sedimentary facies signatures of petrologyand paleontology, the combination regularities of reef(beach)-beach and main controlling factors of the Upper Permian Changxing Formation-Lower Triassic Feixianguan Formation in the eastern Sichuan-northern Chongqing area are dissected in detail. The study area is divided into two types of complete reef-beach combination and incomplete reef-beach combination,and the two combination types are subdivided into five secondary combination types.Among them, the complete combination of the reef(beach)in Changxing Formation and the beach in Feixianguan Formation has more reservoir significance. In particular, the platform margin reef in Changxing Formation and the platform margin beach in Feixianguan Formation combination has the strongest dolomitization in the reef and beach crest, where the reservoir is most developed. The development type of reef-beach combination is usually controlled by sedimentary environment evolution, sea-level fluctuation, and paleo-tectonics. |
| Key words: eastern Sichuan-northern Chongqing area Changxing Formation Feixianguan Formation reef-beach combination controlling factors |
