首页>
外国专利>
SUBSURFACE IMAGERY FOR TEMPERATURE MEASUREMENT AND FLUID FLOW FOR OIL RECOVERY USING ELECTROMAGNETIC IMPEDANCE TOMOGRAPHY (EMIT).
SUBSURFACE IMAGERY FOR TEMPERATURE MEASUREMENT AND FLUID FLOW FOR OIL RECOVERY USING ELECTROMAGNETIC IMPEDANCE TOMOGRAPHY (EMIT).
展开▼
机译：使用电磁阻抗层析成像（EMIT）进行温度测量的地下想象和用于采油的流体流动。
展开▼
页面导航
摘要
著录项
相似文献
摘要
A new application of electromagnetic tomography is described directly related to the efficient recovery of oil and gas as well the removal of unwanted liquids from subsurface formations. The process involves the deployment of both surface and a single borehole magnetic dipole structures used for both transmitting and receiving low frequency electromagnetic energy. The surface antenna consists of circularly concentric arrays of small receiving solenoid antennas and the downhole system consists of one or more solenoid antenna in a single borehole. The concentricity of the surface array is centered about or in proximity to the borehole axis. The electromagnetic field radiated by the downhole antenna is received by each surface antenna. The amplitude and phase of voltages and currents received by each surface antenna is electronically processed based on the theoretical processing principles similar to what has been recently established for electromagnetic impedance tomography (EMIT). Several concentric surface antenna arrays with electronic switching between each circular array and the downhole solenoid will have the ability to image the spread and movement of oil and gas during thermal treatment and provide three dimensional temperature measurement. The oil movement to recovery wells may be provided by radiofrequency heating or steam flood as in enhanced oil recovery. This information allows for developing very efficient oil and fluid recovery techniques by actually observing tomographic images developed according to this invention.
展开▼
