| 摘要: |
| 针对水平井开发底水稠油油藏时发生底水突破产生底水“脊进”的问题,设计三维物理模拟装置,研究底水驱动油藏中的底水脊进及水平井中产生的水淹现象,对均质底水油藏分别进行注氮气泡沫和注冻胶压水锥的两组试验,油藏发生底水突破后,向油藏中注入封堵剂,通过分别注入3个段塞体积为0.1Vp的氮气泡沫和冻胶堵剂,对已经发生底水突破的油藏进行封堵与压水,对比分析泡沫、冻胶等堵剂的控水效果。结果表明,含水率在进行氮气泡沫和冻胶封堵的初期分别降低了48％和24％,最终采出程度分别提高了27％和51％,底水脊进得到了有效压制。 |
| 关键词: 水平井 氮气泡沫 冻胶 底水稠油油藏 底水脊进 |
| DOI：10.3969/j.issn.1673-5005.2015.06.016 |
| 分类号::TE 349 |
| 基金项目:国家自然科学基金项目(51274228) |
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| Experimental study on water control and oil recovery in bottom water driving reservoirs using plugging agents |
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WANG Chunzhi, LI Zhaomin, LI Songyan, LI Binfei, YE Jinqiao
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(School of Petroleum Engineering in China University of Petroleum, Qingdao 266580, China)
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| Abstract: |
| For using horizontal wells in a heavy oil reservoir with bottom water, the bottom water breakthrough can pose a difficult problem for oil production. In this study, laboratory experiments were conducted using a three dimensional physical model to simulate oil production driven by bottom water with horizontal wells. During the experiments, when the bottom water started breakthrough, plugging agents were injected through the horizontal well. The performances of N2 foam and gels were tested for water control. A similar injection scheme was followed for the plugging agents, in which three slugs with a volume of 0.1 VP per slug were injected. The experimental results demonstrate that, after the treatments using N2 foam and the blocking gel in the early stage of water breakthrough, the water cut can be decreased by 48％ and 24％, respectively, while the corresponding oil recovery increased by 27％ and 51％ for each plugging agent. |
| Key words: horizontal wells nitrogen foam gel bottom water reservoirs bottom water breakthrough |
