井中雷达储层监测机理及方法研究

项目名称： 井中雷达储层监测机理及方法研究

项目编号： No.41304078

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 天文学、地球科学

项目作者： 周峰

作者单位： 中国地质大学（武汉）

项目金额： 25万元

中文摘要： 油气开发过程中，储层介质的非均匀性等因素使得生产井早期见水。新近出现的智能井技术通过对分段井的流速进行调控可以缓解这种影响，从而提高油藏管理能力。然而智能井优化控制策略的实际应用受限于井下流体监测技术。本研究提出将通常应用在浅地表环境中的地质雷达用于深部油井中，对采油过程中油水前缘的流动进行动态监测，以对智能井采油优化控制提供储层变化信息。利用混合介质中的电磁传播理论对高频雷达波在储层中的传播和反射机理进行分析，研究井中雷达在储层中工作的最佳频率、最大传播距离等基本参数，分析储层油水界面两边电性参数差异对雷达波反射的影响；建立井中雷达和储层开发相耦合的"电磁-多相流"数值模型，分析金属井筒对电磁波的影响并提出解决方法，对影响井中雷达油水前缘探测的储层参数进行敏感性分析，以探寻两者之间的关联规律；采用砂槽实验进一步验证地质雷达对于孔隙介质中油水前缘运移的探测能力。

中文关键词： 智能井；探地雷达；采收率；储层监测；多相流

英文摘要： In oil production, early water breakthrough is a common phenomenon caused by reservoir heterogeneity.The newly developed smart well technology has potential to relieve this effect by adjusting inflow rates in each smart segment. However,the practicability of smart well optimization and control strategies is restricted by the downhole fluid monitoring techniques. We propose that ground penetrating radar(GPR), which is generally applied in near surface,can be installed in deep oil wells to monitor the movement of water-oil displacement front, and thus can provide enough reservoir information for smart well control. We analyze the propogation and reflection mechanism of high-frequency radar wave in reservoir environment based on the principle of electromagnetic propagation in mixed media to obtain the primary properties that affect radar wave propagation and reflection in reservoirs, such as work frequency and detection depth, and analyze the effect of electrical property contrast of water-oil contact on reflection coefficient. A joint numerical model is established by coupling borehole radar modeling with reservoir modeling. The interference of metal casing on EM wave is analyzed and the solution is proposed. Sensitivity analysis is numerically implemented to investigate the relation between reservoir parameters a

英文关键词： smart well；ground penetrating radar；recovery factor；reservoir monitoring；multiple phase flow