Channel: INTERPRETATION & EVALUATION https://www.ljgczz.com EN-US https://www.ljgczz.com/EN/current.shtml https://www.ljgczz.com 5 T₂ cutoff value, there are slight errors in the calculation of important parameters such as movable fluid saturation, irreducible fluid saturation, and pore size distribution, which restrict the further development of NMR logging technology. The NMR spectra are processed by introducing the segmentation technique of NMR spectra (segmented according to transverse relaxation time), the reconstructed signal is obtained and calculated again, and the oil saturation and porosity in the 1-10 ms segment are optimized to establish a two-dimensional interpretation chart. The application of later data has achieved good results, with the interpretation coincidence rate from 75.6% to 81.6%, improving the accuracy of NMR logging interpretation and evaluation, which can meet the needs of rapid identification of fluid properties in the field.]]> 17 and Ph/nC₁₈. Good results have been obtained in water bearing identification of reef limestone reservoirs of 6 development wells in LF X-1 oilfield by using geochemical bright spots and other geochemical logging characteristic parameters, and the coincidence rate of reservoir interpretation is over 90%. The application results show that geochemical logging plays an important role in reservoir evaluation,water bearing identification and geosteering while drilling.]]> 3/t-8.30 m³/t, with an average of 3.60 m³/t, and the total gas content of the coal seam was between 2.78-14.80 cm³/t, with an average of 7.17 cm³/t. Isothermal adsorption experiments shows that the Langmuir volume of the shale is between 3.33-6.49 cm³/g, with an average of 4.78 cm³/g, and the Langmuir volume of the coal seam is between 12.29-21.67 cm³/g, with an average of 17.75 cm³/g. The gas chemical composition is mainly methane. Through methane isotope analysis of coalbed methane, it is shown that the genesis of coalbed methane in this area is complex, including thermal, biogenic, and secondary thermal genesis. It shows that the area has good comprehensive gas-bearing properties in coal bearing strata.]]>