L&TD

DSN II is a superior neutron porosity tool. This is due to detector array optimization. Far detector count rates are much greater than ever before. Other advantages stem from the ratio-porosity relationship. Detailed analysis shows that DSN II statistical uncertainty has been significantly reduced compared with previous top-performing tools, while the overall signal-to-noise ratio is notably better than before.

Tool specification

These features translate into porosity measurements with outstanding  precision. DSN II delivers porosity measurements with greater accuracy and repeatability than any other neutron porosity service. Designed for use in liquid-filled holes, both open and cased, this service provides:

• Superior accuracy. Consistent measurements over the entire porosity range, even in cased holes.

• Repeatable results. Optimized detector spacing, advanced calibration methods and greater count rates contribute to the service’s outstanding precision.

• Improved thin bed evaluation. Clearer delineation of thin bed formations with Enhanced Vertical Resolution (EVR), available real time or in post processing.

• Increased reservoir understanding. A combination of logging tools can be run to identify lithology, reveal gas zones and calculate shale volumes

• Faster log runs. Save rig time with an optimized design that enables logs to be run at faster cable speeds

• Gas detection. Excellent indication of gas when used in combination with a density log

• Dykes detection. Excellent Effect of basement’s dyke identification when used in combination with a density log