Distribution characteristics of oil sandstone and main controlling factors in Wangguantun oilfield

PreviousNext You have accessInternational Conference and Exhibition, Barcelona, Spain, 3-6 April 2016Distribution characteristics of oil sandstone and main controlling factors in Wangguantun oilfieldAuthors: Xiaoxu RenJiagen HouYuming LiuWen ZhaoXiaoxu RenChina University of Petroleum(Beijing)Search for more papers by this author, Jiagen HouChina University of Petroleum(Beijing)Search for more papers by this author, Yuming LiuChina University of Petroleum(Beijing)Search for more papers by this author, and Wen ZhaoChina University of Petroleum(Beijing)Search for more papers by this authorhttps://doi.org/10.1190/ice2016-6355209.1 SectionsAbout ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Wangguantun oilfield is located in the south of Kongdian salient in Huanghua Depression, the z2 group is the majoy production bed. Sedimentary facies in study area is braided river of alluvial fan. It belongs to medium porosity and medium permeability reservoir. From the two aspects of sedimentary and diagenesis, we analyzed the main factors of oil sand bodies distribution. Sedimentary microfacies has an important influence on the distribution of oil sandstone. As for the braided river of alluvial fan in z2 group, 78% of oil-rich sandstones are mid-chinnel bar, and only 22% are braided channel. Facies controls the development of sandstones, and different kinds of sandstones have different physical properties, thereby, the differences of reservoir qualities lead to the differences of oil-bearing properties. According to the data analysis of 19 coring wells in Wangguantun oilfield, we can know that the porosity and permeability of mid-channel bar are higher than those of braided channel, thus, oil-bearing property of mid-channel bar is bettter than that of braided channel sandstone. Quality of the reservoir in the study area is closely relatedly to diagenesis facies, which has apparently controlled on the distribution of the oil-rich sandstone. the diagenesis facies in study area can be divided into 3 types: corrosion diagenesis facies, weak cementation diagenesis facies, and compaction diagenesis facies. Reservoir of corrosion diagenesis facies is mainly distributed in the sandstone of mid-channel bar. With porosity larger than 20% and permeability larger than 100×10-3μm2, it is the best reservoir of the study area. Cementation diagenesis reservoir is mainly distributed in braided channel. Since it has a relatively high content of interstitial material, reservoir quality is poorer than that of the corrosion one, with porosity generally between 15%~20% and permeability between 50~100×10-3μm2. In the sandstone of the edge of the channel, detrital grains are fine and the content of heterobase is high, which lead to strong compation. With porosity smaller than 15% and permeability smaller than 50×10-3μm2, the reservoir quality is quite poor. Keywords: sediment, reservoir characterizationPermalink: https://doi.org/10.1190/ice2016-6355209.1FiguresReferencesRelatedDetails International Conference and Exhibition, Barcelona, Spain, 3-6 April 2016ISSN (online):2159-6832Copyright: 2016 Pages: 356 publication data© 2016 Published in electronic format with permission by the Society of Exploration Geophysicists and the American Association of Petroleum GeologistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 03 Apr 2016 CITATION INFORMATION Xiaoxu Ren, Jiagen Hou, Yuming Liu, and Wen Zhao, (2016), "Distribution characteristics of oil sandstone and main controlling factors in Wangguantun oilfield," SEG Global Meeting Abstracts : 295-295. https://doi.org/10.1190/ice2016-6355209.1 Plain-Language Summary Keywordssedimentreservoir characterizationLoading ...