科研之友
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摘要
We present here a novel instrument for real time drilling fluid NMR analysis at well site. The quantitative detection of oil and gas in drilling fluid while drilling helps to characterize reservoir quality and evaluate reservoir productivity. There is a big demand to detect oil content in drilling fluid in real time at well site in the petroleum industry. To meet the requirement for continuous and quantitative analysis, the new designed integrate NMR system comprises several subsystems: drilling fluid auto-sampling device, small-sized NMR sensor, spectrometer, main controller and wireless data communication. Auto-sampling device takes drilling fluids samples continuously and quantitatively from the flow line returning from the well and removes debris with diameter greater than 1 mm to reduce interference in measurement process. The small-sized NMR sensor is implemented based on Halbach magnets with 20 kg weight and about 20 MHz operating frequency. The integrated system is capable of performing remote control and data acquisition at harsh environment. The instrument has been fully tested at a number of wells, and successful discovered oil- and gas-bearing formations.
- 出版日期2018-10
- 单位中国石油大学（北京）; 油气资源与探测国家重点实验室
