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| 鄂尔多斯盆地志丹油田永宁探区长6储层特低渗成因及主控因素 |
| 强昆生,王建民,冯永春,田新文,高亚罡,杨杰,吕修祥 |
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(1. 中国石油大学地球科学学院, 北京 102249;
2. 中国石油大学 油气资源与探测国家重点实验室, 北京 102249;
3. 西安石油大学 油气资源学院, 陕西 西安 710065;
4. 延长油田股份公司永宁采油厂, 陕西 志丹 717500) |
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| 摘要: |
| 综合应用测井资料和铸体薄片、扫描电镜、X-衍射、粒度分析等资料,对志丹油田永宁探区长6储层的特低渗透成因和主控因素进行了分析。结果表明:研究区长6储层特低渗透成因主要受沉积作用和成岩作用的双重影响,主要表现为沉积微相对储层物性的影响较大,水下分流河道砂层的物性好于河口坝沉积砂体,河口坝沉积砂体的物性好于分流间湾砂体沉积;成岩压实作用和胶结作用使得储层物性变差,成岩溶蚀及蚀变作用和成岩缝的产生对储层的特低渗物性的改善有积极作用。 |
| 关键词: 志丹油田 永宁探区 特低渗透成因 主控因素 |
| DOI： |
| 附件 |
| 投稿时间：2010-09-22修订日期：2011-04-12 |
| 基金项目: |
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| Origin of extra-low permeability and controlling factors of the Chang-6 reservoirs in the Yongning prospect area, Zhidan Oil Field, Ordos Basin |
| QIANG Kun-sheng, WANG Jian-min, FENG Yong-chun, TIAN Xin-wen, GAO Ya-gong, YANG Jie, LU Xiu-xiang |
(1. College of Geosciences, China University of Petroleum, Beijing 102249, Chain;
2. State Key Laboratory of Petroleum Resources and Exploration, China University of Petroleum, Beijing 102249, China;
3. College of Oil and Gas Resources, Xi'an University of Petroleum, Xi'an 710065, Shaanxi, China;
4. Yongning Oil Production Plant, Yanchang Oil Field Co. Ltd., Zhidan 717500, Shaanxi, China) |
| Abstract: |
| The present paper gives a detailed description of the origin of extra-low permeability and controlling factors of the Chang-6 reservoirs in the Yongning prospect area, Zhidan Oil Field, Ordos Basin on the basis of well logs, cast sections, SEM, X-ray diffraction and grain-size analysis. The results of research show that both sedimentation and diagenesis, especially the sedimentary microfacies have an important effect on extra-low permeability of the Chang-6 reservoirs. In general, the porosity and permeability in the subaqueous distributary channel sandstones are better than those in the channel mouth bar sandstones, which in turn are better than those in the interdistributary bay sandstones. The compaction and cementation tend to be destructive to the development of the porosity and permeability, whereas diagenetic dissolution, alteration and fissures tend to be constructive to the improvement of the porosity and permeability of the reservoirs. |
| Key words: Zhidan Oil Field Yongning prospect area origin of extra-low permeability controlling factor |