ALICATIONOFCORLOGGINGdata碳氧比测井数据的应用.pptVIP

* SERVICE REVIEW CNLC, BEIJING APPLICATION OF COR LOGGING DATA COR LOGGING COR MEASURING PRINCIPLE COR DATA APPLICATION COR DATA PROCESS COR APPLICATION EXAMPLES 1 2 3 4 COR LOGGING —— PULSED NEUTRON GAMMA SPECTRAL LOG COR logging mainly measures ratio of carbon and oxygen in formation.It can determine lithology and oil saturation by analysing measurements of time and spectrum of unelastic scattering and capture gamma ray that is excited in formation by using 14 Mev pulsed neutron. Its most outstanding merit is it can directly measure formation information by penetrating steel case pipe and cement and other medium .The measured result has no relationship with the formation water salinity. It is one of the most effective method to determine oil saturation in cased hole at present. O C n e 14Mev n e 4.43Mev 6.13Mev COR TOOL TYPES A. Monocrystal COR logging tool 1. NaI（T1）crystal detector 2. BGO crystal detector Merit：stronger resistance to neutron disturbance，higher detection efficiency of energy peak value，higher accuracy of oil saturation. B. Bicrystal COR logging tool Equipment of two detector and two spectral processing system. Merit ：effectively increase difference value of COR,increase sensitivity of well logging ； Eliminate influence of fluid in well bore and make more convenience of well logging; Help COR logging in low porosity formation and expand applied range. COR MEASURING PRINCIPLE COR DATA APPLICATION COR DATA PROCESS COR APPLICATION EXAMPLES 1 2 3 4 COR LOGGING APPLIED CONDITION OF COR LOGGING bicrystal COR logging tool monocrystal COR logging tool COR tool types Formation :porosity should be larger 15% Well bore: no demand In general,COR log has good work in casd well Formation:porosity should be larger 15% Well bore: no crude oil is in it In general,COR log has good work in casd well APPLIED CONDITION APPLICATIONS OF COR DATA A. observe change of reservoir saturation in the process of injecte