The Application of Carbon Dioxide Field Detection Technology Based on Infrared Spectroscopy
Accurate detection of non-hydrocarbon gases has always been a difficult problem in exploration while drilling technology.In order to timely and accurately identify carbon dioxide(CO2)while drilling,this paper explores the detection while drilling method of CO2based on infrared spectroscopy.Based on the principle of infrared spectroscopy analysis,the infrared spectroscopy data of gas are preprocessed,qualitatively analyzed and quantitatively analyzed,and the region and influencing factors of natural gas infrared spectroscopy are further analyzed.In order to eliminate the influence of multiple factors such as drilling fluid,reservoir fluid properties and engineering parameters,the existence of CO2 can be qualitatively judged by means of gas true and false display judgment,base line division display,average value calculation and display degree division.The application results of WC structure in Yingqiong Basin show that the CO2 detection method based on infrared spectroscopy can effectively identify CO2 in drilling.CO2 generally exists in the second member of Pearl River Formation and the first member of Zhuhai Formation of WC structure,indicating that this technology has good application value.
infrared spectroscopyCO2detection while drillingWenchang sag