| Development of Karst Formation in Area 4 of Tahe Oil field |
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| 引用本文： | 周英杰 杜玉山 张敬轩 曲全工 李竞好 王强. Development of Karst Formation in Area 4 of Tahe Oil field[J]. 中国矿业大学学报(英文版), 2003, 13(2): 218-222 |
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| 作者姓名： | 周英杰 杜玉山 张敬轩 曲全工 李竞好 王强 |
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| 作者单位： | [1]MineralUniversityofChina,Beijing100083,China [2]GeologicalScienceResearchInstituteofShengliOilfieldLtd.Company,Dongying,Shangdong257015,China |
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| 摘 要： | The main oil-bearing formation of Area 4 of Tahe oilfield is in Yingshan Group of Ordovician consisted of thick pure limestone. The types of the pore space contain the pore, fissure, cave as well as fracture formed by solution collapse. The primary porosity and tectonic fracture are of poor growth. Therefore, the formation growth is mainly controlled by hydraulic units of the palaeo-karst. There are three palaeo-hydraulic zones: vadose zone (including infiltration sub-zone and percolation sub-zone), phreatic zone and tranquil zone. They are identified by retrieving the palaeo-geographical karst environment. The pore space of the infiltration zone is mainly solution fissures, small solution cavities and solution pores. The growth and lateral connection of the formation are favorable. The reservoir/formation ratio is 0.54. The pore space of the phreatic zone developed large size cavities and fractures related to cave collapse. The height of the cavity can reach 71m. The fractures by collapse have a influencing range of more than 100m, and its reservoir/formation ratio is 0. S1. But the lateral connection is unfavorable. The percolation subzone and the tranquil zone are of relatively poor growth with the reservoir/formation ratio less than 0.3.
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| 关 键 词： | Tahe油田 渗透区 地下水 平稳区 岩溶构造 岩层生长规律 |
Development of Karst Formation in Area 4 of Tahe Oilfield |
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| ZHOU Ying-jie,DU Yu-shan,ZHANG Jing-xuan,QU Quan-gong,LI Jing-hao,WU Qiang. Development of Karst Formation in Area 4 of Tahe Oilfield[J]. Journal of China University of Mining and Technology, 2003, 13(2): 218-222 |
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| Authors: | ZHOU Ying-jie DU Yu-shan ZHANG Jing-xuan QU Quan-gong LI Jing-hao WU Qiang |
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| Abstract: | The main oil-bearing formation of Area 4 of Tahe oilfield is in Yingshan Group of Ordovician consisted of thick pure limestone. The types of the pore space contain the pore, fissure, cave as well as fracture formed by solution collapse. The primary porosity and tectonic fracture are of poor growth. Therefore, the formation growth is mainly controlled by hydraulic units of the palaeo-karst. There are three palaeo-hydraulic zones: vadose zone (including infiltration sub-zone and percolation sub-zone), phreatic zone and tranquil zone. They are identified by retrieving the palaeo-geographical karst environment. The pore space of the infiltration zone is mainly solution fissures, small solution cavities and solution pores. The growth and lateral connection of the formation are favorable. The reservoir/formation ratio is 0. 54. The pore space of the phreatic zone developed large size cavities and fractures related to cave collapse. The height of the cavity can reach 71m. The fractures by collapse have a influencing range of more than 100m, and its reservoir/formation ratio is 0. 51. But the lateral connection is unfavorable. The percolation subzone and the tranquil zone are of relatively poor growth with the reservoir/ formation ratio less than 0. 3. |
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| Keywords: | Tahe Oilfield infiltration zone phreatic zone tranquil zone Karst formation formation growth law |
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