| Popis: |
This paper presents the results from a successful field test of a real-time portable sensing system for fluorescent nanoparticle tracers directly from the well head, reducing previous sample processing and detection time by over 99%. In 2014, the first oil industry nanoparticle tracers (ADOTS), were injected at a tertiary produced reservoir to demonstrate for the first time, the ability of nanoparticles to successfully traverse Arab-D reservoir rock. The ADOTS proved to be remarkable reservoir agents showing excellent stability and mobility and are still being recovered more than two years later. ADOTS are inexpensive to produce and can be prepared at the well site. ADOTS sample collection and processing was performed manually, as are most tracer samples and results were obtained at a minimum of 30 hours after sample collection due to the time consuming laboratory processes needed in order to analyze the water with sophisticated instruments for accuracy. To address this issue, a portable real-time sensing system was developed to collect, process and analyze samples directly from the well head in about 5 minutes and is capable of measuring fluorescent tracer concentration at the ppb level. The portable sensing system, was tested, directly from a wellhead currently producing fluorescent nanoparticle tracers from a related injection test. The system was able to process, analyze and report accurate data in about 5 minutes, demonstrating a >99% increase in process efficiency and eliminating the large cost of standard chemical tracer processing. This prototype system provides a revolutionary breakthrough in reducing the time and money associated with detecting fluorescent tracers used for decades in the industry. For the first time, a fluorescent tracer can be detected at the well site in real time using inexpensive, portable equipment. |
