CCPortal
DOI10.1306/1016191619917211
Diagenesis and reservoir quality of lacustrine deep-water gravity-flow sandstones in the Eocene Shahejie Formation in the Dongying sag; Jiyang depression; eastern China
Yang T.; Cao Y.; Friis H.; Liu K.; Wang Y.; Zhou L.; Yuan G.; Xi K.; Zhang S.
发表日期2020
ISSN0149-1423
起始页码1045
结束页码1073
卷号104期号:5
英文摘要The lacustrine deep-water gravity-flow sandstone reservoirs in the middle of the third member of the Shahejie Formation (43.7–38.2 Ma) are the main exploration targets for hydrocarbons in the Dongying sag, Jiyang depression, eastern China. The impact of diagenesis on reservoir quality of these sandstones has been established by a variety of methods. Petrographically, the sandstones consist mainly of lithic arkose (with 43% of quartz, 33% of feldspar, and 24% of lithic fragment) with reservoirs having average porosity and permeability values of 17.1% and 38.1 md, respectively. In addition to their primary intergranular pores, secondary pores are well developed from feldspar dissolution, with pore-throat radii ranging from 0.01 to 40 mm. The dissolution of feldspar and transformation of smectite to illite may be the sources of silica for the first phase of quartz overgrowth, whereas illitization of kaolinite may be responsible for the second phase of quartz overgrowth. In addition, pressure dissolution of quartz is also an important source of silica for quartz overgrowth. Dissolution of feldspar has little impact on reservoir quality, whereas compaction and carbonate cementation are the main factors significantly reducing reservoir quality. Oil charge may have retarded carbonate cementation and generated overpressure that retarded compaction, thus preserving porosity. Precipitation of vermicular kaolinite, resulting from feldspar dissolution, promoted a change in the wettability of the reservoir, from water wet to oil wet, which is beneficial for oil entrapment. The central parts of medium- to thick-bedded sandstones that have experienced oil charge twice appear to have the highest-quality reservoirs based on petrophysical properties. This work provides a new interpretation of the formation mechanism of high-quality lacustrine deep-water gravity-flow sandstones reservoirs that have experienced multiple periods of oil charge. Copyright ©2020. The American Association of Petroleum Geologists. All rights reserved.
语种英语
scopus关键词Cementing (shafts); Compaction; Dissolution; Feldspar; Kaolinite; Petroleum prospecting; Petrophysics; Porosity; Quartz; Sandstone; Sedimentology; Textures; Carbonate cementation; Exploration targets; Feldspar dissolution; Formation mechanism; Petrophysical properties; Pressure dissolution; Sandstone reservoirs; Sandstones reservoirs; Petroleum reservoir engineering; deep water; diagenesis; Eocene; gravity flow; hydrocarbon exploration; hydrocarbon reservoir; kaolinite; overpressure; permeability; reservoir; sandstone; smectite; China; Dongying; Shandong
来源期刊AAPG Bulletin
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/143706
作者单位State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu, China; Department of Geology, Laboratory of Deep Oil and Gas, School of Geosciences, China University of Petroleum (East China), Qingdao, China; Department of Geoscience, Aarhus University, Aarhus, Denmark; Department of Geology, Irish Centre for Research in Applied Geosciences, School of Natural Sciences, Trinity College Dublin, Dublin, Ireland
推荐引用方式
GB/T 7714
Yang T.,Cao Y.,Friis H.,et al. Diagenesis and reservoir quality of lacustrine deep-water gravity-flow sandstones in the Eocene Shahejie Formation in the Dongying sag; Jiyang depression; eastern China[J],2020,104(5).
APA Yang T..,Cao Y..,Friis H..,Liu K..,Wang Y..,...&Zhang S..(2020).Diagenesis and reservoir quality of lacustrine deep-water gravity-flow sandstones in the Eocene Shahejie Formation in the Dongying sag; Jiyang depression; eastern China.AAPG Bulletin,104(5).
MLA Yang T.,et al."Diagenesis and reservoir quality of lacustrine deep-water gravity-flow sandstones in the Eocene Shahejie Formation in the Dongying sag; Jiyang depression; eastern China".AAPG Bulletin 104.5(2020).
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Yang T.]的文章
[Cao Y.]的文章
[Friis H.]的文章
百度学术
百度学术中相似的文章
[Yang T.]的文章
[Cao Y.]的文章
[Friis H.]的文章
必应学术
必应学术中相似的文章
[Yang T.]的文章
[Cao Y.]的文章
[Friis H.]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。