DecisionXpress Viewer
View and Reprocess Data in Real Time
Users can view and reprocess data obtained from DecisionXpress service in real time in the office or at the wellsite with the DecisionXpress Viewer, a stand-alone PC application. The DecisionXpress Viewer application is simple enough for occasional users, yet advanced enough to perform a robust petrophysical evaluation suitable for immediate and long-term well decisions. There are only three user inputs required for the interpretation: formation water salinity (FSAL), cation exchange capacity (CEC), and hydrocarbon viscosity (HVIS).
At the heart of the DecisionXpress Viewer is the DecisionXpress (Version 2.0) petrophysical evaluation system algorithm engine, which provides a quality-controlled petrophysical interpretation in siliciclastic formations. SpectroLith processing of capture spectroscopy data from the ECS elemental capture spectroscopy sonde provides quantitative mineralogy and matrix properties. Total porosity (PHIT) is computed from Platform Express density (RHOZ) and environmentally corrected neutron porosity (NPOR), which are first adjusted for matrix effects. Total water saturations in the uninvaded and flushed zones (SWT, SXOT, respectively) are computed from the Waxman-Smits equation using a variable m* exponent. Intrinsic permeability (KINT) and irreducible water saturations (SWI) are computed from porosity and mineralogy using the K-lamda permeability equation.
DecisionXpress service provides quantitative lithology and mineralogy, porosity, and water saturation. It also provides semiquantitative permeability and producibility for facilitating decisions for
- planning MDT modular formation dynamics tester pressure measurement and fluid sampling
- planning of mechanical and percussion sidewall coring
- planning of formation tests
- running casing, drilling ahead, or sidetracking
- development of completion strategies.
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