公开(公告)号：US20150115953A1

公开(公告)日：2015-04-30

申请号：US14067475

申请日：2013-10-30

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： A. BALLARD ANDREWS ,  SORAYA S. BETANCOURT ,  ANDREW E. POMERANTZ ,  SOUMYAJIT MANDAL ,  YI-QIAO SONG

IPC: G01V3/08 ,  E21B49/00

CPC classification number: G01V3/08 ,  G01N24/081 ,  G01V3/32

Abstract: A formation fluid sample is analyzed using NMR spectroscopy to obtain a NMR spectrum. The NMR spectrum is then analyzed to find evidence of the amount of olefins present in the sample. The amount of olefins present in the sample can then be correlated to the level of contamination of the sample. In one embodiment, a 1H chemical shift of between substantially 4.5 and 6 ppm is used to identify olefins present in the sample. In another embodiment, a 1H chemical shift of substantially 1.9 to 2.1 ppm is used to identify olefins present in the sample. The NMR spectral equipment can be located uphole or downhole.

Abstract translation: 使用NMR光谱分析地层流体样品以获得NMR光谱。 然后分析NMR谱以发现样品中存在的烯烃的量的证据。 然后可以将样品中存在的烯烃的量与样品的污染水平相关联。 在一个实施方案中，使用基本上4.5和6ppm之间的1H化学位移来鉴定样品中存在的烯烃。 在另一个实施方案中，使用基本上1.9至2.1ppm的1H化学位移来鉴定样品中存在的烯烃。 NMR光谱设备可以位于井下或井下。