Improvement of skill devices in the operation of offshore oil and gas fields
According to the on-site statistics of the BZ34 oilfield, the duration of the non-associated gas in the liquid does not exceed 10 minutes, and combined with the production decline of the oilfield in the next 35 years, it is determined that the volume of the newly added storage tank is 20 minutes for the turbine generator to run. Gas calculation. The optimized process of the turbine generator fuel gas system is as shown in the figure, in which a regulating valve PC1 is installed on the pipeline between the surge tank and the tank, and the pressure of the surge tank is controlled at about 3000 kPaG; A regulating valve PC2 is installed on the pipeline to the inlet of the compressor, and the inlet pressure of the compressor is controlled to be not less than 400 kPaG; a regulating valve PC3 is installed on the pipeline in which the adjusting tank is vented to the torch, and the pressure of the regulating tank is maintained at 3000 kPaG; A regulating valve PC4 is installed on the outlet line of the storage tank to control the inlet pressure of the turbine generator to be stable at 1200 kPaG. When the sea pipe slug is severe, the natural gas flow provided by the primary separator will decrease, at which point the compressor inlet pressure will drop, the regulating valve PC2 will open, the gas in the surge tank will flow back to the compressor inlet, and the regulating valve PC1 Closed, the inlet and outlet pressure of the compressor can be ensured, and the operating state is stabilized; the gas in the tank is adjusted for use by the turbine generator. As the pressure inside the tank decreases, the opening degree of the regulating valve PC4 gradually increases, which can ensure the penetration. Flat the generator inlet pressure to make it operate normally (the amount of gas in the tank can be maintained to maintain the turbine generator for 10 minutes). In this way, before the next gas peak, the fuel switching of the generator can be avoided, and the normal operation of the compressor can be ensured. Through the analysis and research on the production process pressure system of the B platform, it is considered that if the water injection pipeline from the A platform to the B platform is changed to the oil pipeline from the B platform to the A platform, the inlet pressure of the B platform sea pipe can be reduced, and the B platform can be increased. Production pressure difference in production wells, thereby increasing production. According to this idea, two sets of seawater lifting pumps have been added to the B platform, so that the fire water and daily seawater can be independently provided. At the same time, the original water injection sea pipe is changed into the oil transportation sea pipe, and the B platform double pipe transmission is realized. oil. The actual production results show that the double pipe oil transfer reduces the back pressure of the B platform wellhead from 145 MPa to 095 MPa, which increases the production pressure difference of the B platform production well. The daily output of the B platform increases by 300 m3, and the daily oil production increases by 36 m3. A good oiling effect has been achieved. Conclusion At present, some offshore oil and gas fields have entered the late stage of development and production, and some bottlenecks restricting production have appeared to varying degrees. Practice has proved that the optimization and transformation of the production process system is the only way to ensure the normal production of offshore oil and gas fields. At the same time, in the design and construction of new oil and gas field production facilities, the possible problems in the later stage of oil and gas production should be considered as much as possible to create conditions for the optimization and transformation of the production process system in the later oil and gas fields. Our firm introduced whole set of good-sized numerical control hydraulic
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