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| 涠洲12-1油田天然气-水控制气窜及机理研究 |
| Study on gas-water control gas channeling and Mechanism in Weizhou 12-1 Oilfield |
| 投稿时间：2020-11-07 修订日期：2020-11-07 |
| DOI： |
| 中文关键词: 天然气驱 气窜 混相程度 水气交替WAG技术 微观机理 |
| 英文关键词: Natural gas flooding Gas channeling Degree of miscibility Alternate WAG technology Microscopic mechanism |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 中文摘要: |
| 涠洲12-1油田涠四段油藏位于中国南海北部湾海域,注天然气开发面临气油比快速上升,气窜现象严重的问题。利用细管装置测定涠四段油藏原油的最小混相压力；通过室内物理模拟实验,将天然气驱与天然气-水交替驱进行对比；利用可视化平面模型对其微观机理进行研究,分析剩余油的分布特征。结果表明：该油田天然气驱混相压力为36.35MPa,属于非混相驱替,采用天然气-水交替驱可以有效减缓气油比上升速度,增加驱油效率,其贾敏效应增强,显著提升了波及体积,为该油藏控制天然气气窜和提高采收率奠定了基础。 |
| 英文摘要: |
| The weizhou 12-1 oil field is located in beibu gulf, south China sea, and the development of natural gas is facing a serious problem of rapid increase in gas-oil ratio and gas channeling phenomenon. The minimum mixed pressure was measured by the thin-tube device, the natural gas drive was compared with the natural gas-water alternating drive by indoor physics simulation experiment, and the micro-mechanism of the oil was studied by using the visual plane model to analyze the distribution characteristics of the remaining oil. The results show that the minimum mixed pressure of the oil field is 36.35MPa, which belongs to the non-mixed phase-drive, and the use of natural gas-water alternating drive can effectively slow down the rising speed of gas-oil ratio and increase the oil-repellent efficiency. The Jiamin effect is enhanced, which significantly enhanced the wave volume and it has laid a foundation for controlling gas channeling and enhancing oil recovery in this reservoir. |
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