Model identification and control of development of deeply buried paleokarst reservoir in the central Tarim Basin, northwest China
文献类型：期刊论文
| 作者 | Yu,Jingbo1; Li,Zhong1,2; Yang,Liu3; Han,Yinxue4 |
| 刊名 | Journal of Geophysics and Engineering
 |
| 出版日期 | 2018-02-15 |
| 卷号 | 15期号:2 |
| 关键词 | Tarim Basin Tazhong uplift paleokarst reservoirs seismic reservoir characterization FMI well-logs |
| ISSN号 | 1742-2132 |
| DOI | 10.1088/1742-2140/aa9c00 |
| 英文摘要 | Abstract The paleokarst reservoirs of the Ordovician Yingshan formation, rich in oil and gas, are deeply buried in the central Tarim Basin, northwest China. Dozens of imaging well-logs in this region reveal five typical paleokarst features, including solution vugs, solution-enlarged fractures, filled caves, unfilled caves and collapsed caves, as well as two typical paleokarst structures located in different paleotopographic sites, including paleokarst vadose and phreatic zones. For seismic data, the large wave impedance contrast between the paleocave system and the surrounding rocks leads to a strong seismic reflection, which is highlighted as a bead-like ‘bright spot’ in a seismic section. By quantitatively estimating the seismic resolution limits of deep seismic reflections, a single paleocave cannot be identified from a seismic profile, and the bead-like reflection represents an entire paleocave complex. The spectral decomposition technique was employed to depict the planar shape and semi-quantitatively measure the size of the paleocave complexes. The results indicate that the sizes of the paleokarst caves are all small, and most of the karst caves are nearly completely filled by clay and calcite. The small cave size and the effective support of cave fills for the overlying strata mean that some individual paleocaves in a paleocave complex are preserved at a burial depth of more than 6000 m. Paleotopography and faults strongly impact the distribution of paleokarst reservoirs. Well-developed paleokarst reservoirs are generally located in paleotopographic highlands and on slopes, and for a specific paleotopographic site, the distribution of paleokarst reservoirs is obviously controlled by NW-SE trending faults. The most favorable area for paleokarst development is the Tazhong No. 10 fault zone, a faulted anticline bounded by two NW-SE trending back thrusts. |
| 语种 | 英语 |
| WOS记录号 | IOP:1742-2132-15-2-AA9C00 |
| 出版者 | IOP Publishing |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/64219]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 作者单位 | 1.State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, People’s Republic of China 2.University of Chinese Academy of Sciences, Beijing 100029, People’s Republic of China 3.Hangzhou Research Institute of Geology, Petrochina, Hangzhou 310023, People’s Republic of China 4.Research Institute, China National Offshore Oil Corporation, Beijing 100027, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Yu,Jingbo,Li,Zhong,Yang,Liu,et al. Model identification and control of development of deeply buried paleokarst reservoir in the central Tarim Basin, northwest China[J]. Journal of Geophysics and Engineering,2018,15(2). |
| APA | Yu,Jingbo,Li,Zhong,Yang,Liu,&Han,Yinxue.(2018).Model identification and control of development of deeply buried paleokarst reservoir in the central Tarim Basin, northwest China.Journal of Geophysics and Engineering,15(2). |
| MLA | Yu,Jingbo,et al."Model identification and control of development of deeply buried paleokarst reservoir in the central Tarim Basin, northwest China".Journal of Geophysics and Engineering 15.2(2018). |
入库方式： OAI收割
来源：地质与地球物理研究所
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