Application of Thermal Neutron Imaging System in Oil & Gas Field development

Abstract

Abstract The correct identification of oil and gas reservoirs is very important in oil and gas field production. To solve the problem of oil and gas reservoir evaluation in low salinity and low porosity reservoirs, thermal neutron imaging system(TNIS) is introduced. The advantage of TNIS is that it can record a large number of formation information through multiple detectors to obtain imaging documents, allowing intuitive quantitative analysis of formation, and calculate oil and gas saturation through thermal neutron capture cross section, attenuation spectrum and capture spectrum, so as to obtain oil/gas/water distribution near wellbore. In the processing, interpretation and evaluation of thermal neutron imaging logging data, the interpretation model, parameters and criteria are established according to the geological characteristics of lithology and formation water salinity of the target block, which improves the interpretation coincidence rate. Field application shows that thermal neutron imaging logging has achieved sound effects in identifying watered-out zone, potential zone, gas reservoir and residual oil distribution monitoring.