Saitreg Fuel Nozzles Fuel Nozzles and Pumps

Fuel Pressure Regulator Explorer

Fuel Pressure Regulator Explorer

oil] Completion Fluid Gas And Condensate Production Capacity Of Oil

HC Network Petrochemical News: The carbonate rock formations, horizontal wells in the water lock is an important issue. In the fractured, completion fluid leak into the ground because of cracks caused by water blocking may reduce the productivity of gas wells, the majority of playing in the crack formation in the gas well takes a long time to clear completion fluids. Workover, the water lock which may affect gas recovery capacity. In the stimulation and remedial measures taken during the general practice is to a large number of gas pumped into the well. The effect of this approach need to be evaluated, especially in this part of the horizontal wells and the effect of depletion layer need to be evaluated. Saudi Aramco companies have tested and evaluated the specific practices are as follows:

1. Test Method (1) core injection experiment Order to simulate the gas near the water hole Strip lock situation, design a core gas injection apparatus. Use Screw To the constant displacement and 10000psi 400cm3/min pressure liquid injection. Use with a floating piston accumulator and 350oF in 10000psi under the storage of gas and liquid. Core holder can be up to a diameter of 1.5in, length of 3in the core. Use pressure Sensor To measure the core cross-section of the pressure drop. Flow down approach to take to overcome the effects of gravity separation.

On Oven The core holder to impose 4000psi high pressure and continue to 5hr. Measured at 1500psi and 230oF core of the gas permeability. Then injected completion fluids to core saturation. Rock out with nitrogen for the hearts of completion fluids and completion fluids to determine the saturation of the core permeability.

Use two pumps to a constant ratio of oil to the cores into Diesel fuel And water mixture. Upstream and downstream pressure regulator back pressure regulator set at 1500psi.

(2) Measurement of interfacial tension Use of high temperature and pressure measured vertical drop of gas / liquid surface tension. Completion fluid into the use of portable pumps. Measuring surface tension are the most important step. First of all, clean pipe with toluene, then Methanol Flushing pipes, and finally air drying pipeline. First, wash water with ethanol, followed by ion-free water. Measured with a vertical drop of gas / liquid surface tension.

2. Using the results and need to explore issues

(1) the surface tension measurement results: surface tension meter for calibration and standard test methods to enable the use of distilled water trickle surface tension measurement, the measured value and literature exactly the same measurement data published.

(2) core injection experiment: The carbonate rock and sandstone core at 230oF and 1500psi gas injection experiment conducted. Using X-ray diffraction analysis of the core lithology. In the carbonate rocks in the hearts of a large number of dolomite and calcite contain minerals, and sandstone core containing 4% Clay . Completion fluid into the core through the pre-and post-production index of the completion fluid on Productivity Index. The results pointed out that the productivity index and the injected pore volume occupied by gas was a function.

(3) injection of diesel / water mixture: As the gas has been exhausted, the completion and workover to use when low-density completion fluid. If the recent decline in the penetration rate of hole area is not, you can use diesel oil as Solvent . The result is the liquid inside the hole can easily be out of gas for. Check the pressure drop on the replacement of the liquid. In the high pressure down, salt Cleaning cores faster. For example, in 1310psi pressure lowering, when the injected gas accounted for 70 pore volume, the gas production index reached the maximum. With diesel, to achieve maximum productivity index will have to inject more diesel pore volume to achieve maximum productivity index.

(4) Solvent: methanol and isopropanol were tested to determine the two solvents in the elimination and mitigation of water lock, and increase productivity index results. When the amount of methanol injection to 18 pore volume, productivity index will reach the maximum.

3. Field Application Guide

Study shows that to change in the carbonate rocks and sandstone reservoirs of the gas well completion practices. To avoid water lock, the completion time, especially in the dense layer and the low level of completion within the pump when the gas will not go into a lot of salt. Completion fluids and fracturing fluids in the addition of ethanol will help improve the productivity of gas wells. I want to comment

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