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| 甘肃陇东地区上三叠统延长组长6、长8沉积特征及低渗响应 | |
| 引用本文： | 史成恩,罗晓容,万晓龙,李亮.甘肃陇东地区上三叠统延长组长6、长8沉积特征及低渗响应[J].地质力学学报,2006,12(4):454-461. |
| 作者姓名： | 史成恩 罗晓容 万晓龙 李亮 |
| 作者单位： | 1. 中国科学院地质与地球物理研究所,北京,100029;中国石油长庆油田公司勘探与开发研究院,陕西,西安,710021 2. 中国科学院地质与地球物理研究所,北京,100029 3. 中国石油长庆油田公司勘探与开发研究院,陕西,西安,710021 |
| 摘 要： | 陇东地区白马区长8储层是在湖盆扩张过程中形成的三角洲前缘水下分流河道沉积，合水区长6储层主要发育三角洲前缘浊积体，为低孔特低渗储层。二者同属西南物源沉积体系的两套储层，由于不同的水动力条件、搬运距离、沉积地形、沉积水深等环境及中等压实强度的影响，形成了该区特低渗储层。储层粒度细、绿泥石不发育和碳酸盐胶结物含量高是导致合水长6，比白马区长8。储层物性更差的主控因素。 |
| 关 键 词： | 甘肃陇东地区 延长组 沉积差异 低渗响应 |
| 文章编号： | 1006-6616（2006）04-0454-08 |
| 收稿时间： | 2006-06-15 |
| 修稿时间： | 2006年6月15日 |
SEDIMENTARY DIFFERENCE AND LOW-PERMEABILITY RESPONSE OF THE UPPER TRIASSIC YANCHANG FORMATION IN THE LONGDONG AREA, GANSU-EXAMPLES FROM THE CHANG 6 RESERVOIR IN HESHUI AND CHANG 8 RESERVOIR IN BAIMA |
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| SHI Cheng-en,LUO Xiao-rong,WAN Xiao-long,LI Liang.SEDIMENTARY DIFFERENCE AND LOW-PERMEABILITY RESPONSE OF THE UPPER TRIASSIC YANCHANG FORMATION IN THE LONGDONG AREA, GANSU-EXAMPLES FROM THE CHANG 6 RESERVOIR IN HESHUI AND CHANG 8 RESERVOIR IN BAIMA[J].Journal of Geomechanics,2006,12(4):454-461. | |
| Authors: | SHI Cheng-en LUO Xiao-rong WAN Xiao-long LI Liang |
| Institution: | Institute of Geology and Geophysics, Chinese Academy Sciences, Beijing 100029;Research Institute of Exploration and Development, Changqing Oilfield Company, Xi''an 710021, Shaanxi,Institute of Geology and Geophysics, Chinese Academy Sciences, Beijing 100029,Research Institute of Exploration and Development, Changqing Oilfield Company, Xi''an 710021, Shaanxi and Research Institute of Exploration and Development, Changqing Oilfield Company, Xi''an 710021, Shaanxi |
| Abstract: | The Chang 8 reservoir at Baima in the Longdong area consists of delta-front underwater distributary channel deposits formed in the process of lake basin expansion, while the Heshui Chang 6 reservoir was mainly delta-front turbidity sand. They are low- and very low-permeability reservoirs respectively, both belonging to the southwest provenance sedimentary system of the Ordos basin, and the very low-permeability reservoir formed in the area due to different hydrodynamic conditions, transport distances, depositional topographic conditions and depositional water depths, as well as the influence of the moderate compaction strength. The fine grain size, lacking of chlorite and high contents of carbonate cements are the main controlling factors that make the physical properties of the Heshui Chang 63 reservoir poorer than those of the Baima Chang 81 reservoir. |
| Keywords: | Longdong area Yanchang Formation sedimentary difference low-permeability response |
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