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特高含水期油田的优势渗流通道预警及差异化调整策略
姜汉桥
0
(中国石油大学石油工程学院,北京 102249)
摘要:
针对特高含水期油藏发育优势渗流通道所引起的主要生产矛盾,根据优势渗流通道的潜在地质特征和动态形成特征,从不同角度给出优势渗流通道的概念,应用预警理论和油藏工程原理,建立优势渗流通道的预警模型和不同发育级别优势渗流通道的动态判别方法,用以识别特高含水期油藏中优势渗流通道严重发育、一般发育和不发育三个级别的区域分布。通过数值模拟研究,给出了治理不同发育级别优势渗流通道的深部封窜方法和深部调驱方法的条件和界限;基于封窜和调驱的见效机制和效果构成研究,揭示了治理优势渗流通道后的有效驱替接替方式是发挥封窜和调驱潜力的技术关键;在此基础上,提出了具有优势渗流通道的特高含水期油藏差异化精细调整策略。
关键词:  油藏  优势渗流通道  预警方法  差异化调整
DOI:10.3969/j.issn.1673-5005.2013.05.017
投稿时间:2013-07-15
基金项目:国家科技重大专项课题(2011ZX05009-006)
Early-warning and differentiated adjustment methods for channeling in oil reservoirs at ultra-high water cut stage
JIANG Han-qiao
(College of Petroleum Engineering in China University of Petroleum, Beijing 102249, China)
Abstract:
Channels with very high permeability can be developed in oil reservoirs at ultra-high water cut stage. In this study, different types of channeling problems were identified and described according to the geological characteristics of the reservoir and the dynamics of channel forming. An early warning and discriminating model for the detection of channeling was proposed based on the theory of early warning and the principles of reservoir engineering. The model can be used to identify various channels and their distribution in the reservoir, and the channels are differentiated as severely, normally and less-developed according to their flow conductivities. Water shut-off and conformance control methods were proposed for different types of the channels and their performance and application conditions were assessed using a numerical simulation model. The results show that,after the water shut-off or conformance control treatments, the selection of the subsequent or alternative flooding mode is very important to enhance the effectiveness of the channel blockage and control technique. Finally, a differentiated and fine adjustment strategy for controlling the channeling problems was proposed, which can be used for mature oil reservoirs at ultra-high water cut stage.
Key words:  reservoir  channeling  early-warning method  differentiated adjustment
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