| 低渗透油藏二氧化碳混相驱注采方式研究——以克拉玛依油田X区克下组低渗透油藏为例 |
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| 引用本文： | 李玮,师庆三,董海海,侯锐.低渗透油藏二氧化碳混相驱注采方式研究——以克拉玛依油田X区克下组低渗透油藏为例[J].中国地质,2022,49(2):485-495. |
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| 作者姓名： | 李玮 师庆三 董海海 侯锐 |
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| 作者单位： | 1. 新疆大学地质与矿业工程学院;2. 新疆油田公司勘探开发研究院;3. 新疆正天华能环境工程技术有限公司 |
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| 基金项目： | 国家科技重大专项（2016ZX05016-004）资助~~； |
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| 摘 要： | 研究目的]克拉玛依油田X区克下组低渗透油藏存在物性差、水驱开发采收率低等问题,影响了油田的可持续发展.CO2是全球变暖的主要成分,世界各国都在想方设法减少CO2的排放量,本文试图利用CO2驱油气方式提高该油藏的采收率,变害为利.研究方法]文章选取研究区60余口取心井目标层位岩心样品,开展扫描电镜及压汞测试分析等研究...
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| 关 键 词： | 低渗透油藏 细管试验 CO2水气交替驱 CO2连续气驱 数值模拟 油气勘查工程 克拉玛依油田 新疆 |
| 收稿时间： | 2019/12/25 0:00:00 |
| 修稿时间： | 2020/1/7 0:00:00 |
Optimum selection of injection-production method for carbon dioxide miscible flooding in low permeability reservoirs: Taking the low-permeability reservoirs of the Kexia Formation in the X zone of the Karamay Oilfield as an example |
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| LI Wei,SHI Qingsan,DONG Haihai,HOU Rui.Optimum selection of injection-production method for carbon dioxide miscible flooding in low permeability reservoirs: Taking the low-permeability reservoirs of the Kexia Formation in the X zone of the Karamay Oilfield as an example[J].Chinese Geology,2022,49(2):485-495. |
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| Authors: | LI Wei SHI Qingsan DONG Haihai HOU Rui |
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| Institution: | College of Geology and mining engineering, Xinjiang University, Urumqi 830047, Xinjiang, China;Xinjiang Oil Field Co exploration and Development Research Institute, Karamay 834000, Xinjiang, China; Xinjiang Zheng Tian Huaneng Environmental Engineering Technology Co., Ltd., Urumqi 830047, Xinjiang, China |
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| Abstract: | This paper is the result of oil and gas exploration engineering.Objective] The low-permeability reservoirs of the Kexia Formation in the X zone of the Karamay Oilfield have problems such as poor physical properties and low waterflooding development and recovery, which affect the sustainable development of the oilfield. CO2 is the main component of global warming, every country in the world is trying to reduce its content in the atmosphere. This research attempts to use CO2 to drive oil and gas to increase the oil production rate in this reservoir and turn bane into a boon.Methods] According to the core samples of the Lower Karamay formation from more than 60 coring wells in the test area, combined with the data of SEM and mercury injection test, the reservoir characteristics are systematically studied, and the pore structure characteristics of low-permeability sandstone reservoir are clearly studied. Using reservoir numerical simulation technology, the injection and production parameters of CO2 water-gas alternating flooding (CO2-WAG) and CO2 continuous gas flooding were optimized, and on this basis, the two development modes were compared.Results] The optimum technical scheme is obtained:using CO2 water-gas alternating flooding technology, 15 wells are injected with water-gas alternately after 4 years of continuous gas injection. The gas-water ratio is 2:1, the gas-water ratio is 1:1 after 10 years. The numerical simulation predicts that the final recovery rate is increased by more than 30% after 15 years of gas injection development.Conclusions] Experiments show that the oil production after gas injection is 1.85 times that of water injection. The output is increased. It is of great significance to achieve stable production in the old oilfieldsand sustainable development of the oilfield.Highlights: Through the reservoir characteristics are systematically studied, and the pore structure characteristics of lowpermeability sandstone reservoir are clearly studied. Using reservoir numerical simulation technology, the injection and production parameters of CO2 water-gas alternating flooding (CO2-WAG) and CO2 continuous gas flooding were optimized, optimum technical scheme is obtained. |
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| Keywords: | low permeability reservoir thin tube test CO2 water-gas alternating flooding (CO2-WAG) CO2 continuous gas flooding numerical simulation oil and gas exploration engineering Karamay oilfield Xinjiang |
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