| 准中1区三工河组二段低孔渗储层特征及主控因素 |
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| 引用本文： | 李圣,王国芝,李娜,刘定坤.准中1区三工河组二段低孔渗储层特征及主控因素[J].世界地质,2018,37(3):873-881. |
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| 作者姓名： | 李圣 王国芝 李娜 刘定坤 |
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| 作者单位： | 1. 成都理工大学 地球科学学院, 成都 610059;2. 成都理工大学 油气藏地质及开发工程国家重点实验室, 成都 610059 |
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| 基金项目： | 国家科技重大专项（2016ZX05002-006）资助. |
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| 摘 要： | 通过岩芯观察、测井和录井资料、铸体薄片观察,研究准中1区三工河组二段储层特征及致密化因素。研究表明,储层砂体发育于水下分流河道、河口砂坝和远沙坝;储集岩以长石岩屑砂岩、岩屑砂岩为主;储集空间以次生溶孔为主,含少量原生孔隙,为孔缝型储层。储层受原生沉积相和后生成岩作用改造的双重控制。强烈的压实作用、钙质胶结是导致储层致密的主要因素,后期深埋溶蚀则是储层得以改造的关键控制因素。优质储层主要发育于水下分流河道,表现为粗粒、弱压实、弱钙质胶结、强溶蚀微观特征。
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| 关 键 词： | 致密储层 成岩作用 沉积微相 准噶尔盆地 |
| 收稿时间： | 2018-06-05 |
| 修稿时间： | 2018-08-17 |
Low porosity and permeability reservoir characteristics and controlling factors of 2th member of Sangonghe Formation in block 1 of central Junggar Basin |
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| LI Sheng,WANG Guo-zhi,LI Na,LIU Ding-kun.Low porosity and permeability reservoir characteristics and controlling factors of 2th member of Sangonghe Formation in block 1 of central Junggar Basin[J].World Geology,2018,37(3):873-881. |
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| Authors: | LI Sheng WANG Guo-zhi LI Na LIU Ding-kun |
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| Institution: | 1. College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China;2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China |
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| Abstract: | The characteristics and densification factors of 2th member of Sangonghe Formation in block 1 of central Junggar Basin are studied by means of core observation, well log analysis and thin section identification. The results show that the reservoirs are mainly developed in submerged distributary channel, river mouth bar and distal bar. Reservoir rocks are mainly composed of feldspar lithic sandstone and lithic sandstone. Reservoir spaces mainly consist of secondary dissolved pores and a few primary pores, which demonstrates pore-fracture type reservoir. The development of reservoir is dually controlled by sedimentary facies and diagenesis. Strong compaction and calcite cementation are crucial factors of densification, while the late buried dissolution is a key controlling element of quality improvement. High-quality reservoir mainly develops in submerged distributary channel sand with coarse-grain, weak compaction, low calcite and strong dissolution. |
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| Keywords: | diagenesis sedimentary facies Junggar Basin |
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