Oil-rich shale developments have increased a great deal of unmistakable quality as of late. A significant test in displaying and foreseeing creation conduct from fluid rich shale repositories is the nonattendance of dependable compelling porousness or relative penetrability esteems to the progression of water and oil. We have structured a trial arrangement to do consistent state fluid penetrability estimations on shale plugs at repository states of overburden pressure, pore weight and temperature utilizing fluid hydrocarbon liquids and salt waters, while observing their relative immersions in a high-field 3D inclination prepared 12 MHz NMR spectrometer times connection.
The test procedure starts with doing as-got NMR checks on shale center attachment tests to quantify the measure of water and oil in the examples. Miniaturized scale CT examines are utilized to recognize and dismiss plug tests that have small scale splits. These examples are then immersed with hydrocarbons, as well as saline solutions through a blend of vacuum-helped unconstrained imbibition, weight and temperature. Following immersion, NMR filters are done to discover the immersion of the fluid hydrocarbon and water in the example. The examples are then stacked in an overburden cell which doesn’t have a NMR signal. As the example is raised to supply states of overburden pressure and temperature, hydrocarbon liquid is infused in the cell from one side of the fitting while at the same time keeping variable backpressure on the opposite end. During the entire procedure, infusion stream rates are constantly observed alongside upstream and downstream weights to process penetrability. Hydrocarbon liquid porousness can likewise be estimated in the wake of immersing or infusing brackish water in the example. This estimation is like a relative porousness estimation of fluid hydrocarbons within the sight of water immersion, which is precisely checked utilizing the high-field NMR arrangement. The equivalent should be possible to set up salt water compelling penetrability by infusing saline solution through an as-got plug pre-soaked with brackish water. The epic procedure has likewise been utilized to perform fluid weight tumble off tests and shut-in tests on shale connects request to reproduce real field repository building PTA schedules.
This contraption is fit for going to 10,000 psi in binding weight, 9000 psi of pore weight and temperatures up to 100°C. Stream rates as little as 0.00001 ml/min can be estimated, and single digit nano-Darcy penetrability esteems have been estimated. Tests have been run with created dead unrefined, reformulated live rough, decane and delivered brackish waters. These deliberate penetrability esteems have been effectively utilized in repository recreation concentrates in different whimsical shale plays, for example, the Wolfcamp, Eagleford, Vaca Muerta, Austin Chalk, Niobrara, and so forth.