Recently, the North China Oil and Gas Production Plant No. 1 has developed potential measures for long-term shut-down of wells, and developed targeted measures to carry out drilling, sweeping, slipping, sand flushing and gas lift measures for DPH-40 well, which successfully resumed production and restored production to 2 Million. 磁力泵 转载发布；上海超乐主要生产 高温磁力泵 , 自吸式磁力泵 , 氟塑料磁力泵 , 塑料磁力泵 , 氟塑料自吸磁力泵 ; 不锈钢磁力泵 , 磁力旋涡泵 , 管道磁力泵 , 立式磁力泵 , 卧式磁力泵 , 衬氟磁力泵 等，咨询或订购 磁力泵 欢迎联系。 This article is published by Shanghai Chaole Magnetic Pump ; Shanghai Chaole mainly produces high temperature magnetic pumps , self-priming magnetic pumps , fluoroplastic magnetic pumps , plastic magnetic pumps , fluoroplastic self-priming magnetic pumps ; stainless steel magnetic pumps , magnetic vortex pumps , pipeline Magnetic pumps , vertical magnetic pumps , horizontal magnetic pumps , fluorine-lined magnetic pumps, etc. Please contact us for inquiries or order magnetic pumps .
Well DPH-40 is a horizontal well that was put into production in 2013. The production horizon is box 1. It has an unobstructed flow of 56,100 m3 / day and a water-gas ratio of about 10, which belongs to a high-production water-gas well. As the well was put into production in winter, frequent ice blockage of the gas production pipeline caused difficulty in draining back drainage fluid, and severe sand production caused the well to be flooded shortly after being put into production. From 2014 to 2018, a total of 7 wells were conventionally lifted. , Not resumed successfully. The drilling, sweeping, slipping sand-blasting and gas-lifting measures for this well began in July 2019, and production resumed successfully after one and a half months of construction.
Earlier this year, technicians from the development institute of the plant found that the well was drilled in the box 1-1 braided channel when the potential of the shutdown well was exhausted. The sandstone encounter rate was 93.06%. 236.5 meters, accounting for 17.84%, with an average total hydrocarbon of 3.713% and a maximum total hydrocarbon of 6.41%. Although the drilling effect is average, after the fracturing transformation, multiple sand bodies in the river channel were communicated, and the production reached 4.5-5.1 The total output is 10,000 yuan per 10 hours, but the cumulative output since it has been put into operation is only 900,000 cubic meters, which has the geological potential for treatment. The long-term shutdown of the well resulted in more fluid accumulation in the wellbore, high liquid level, and poor conventional gas lift in the early stage. In addition to the record of sand production, technicians determined that the fracturing sand deposited in the wellbore of the horizontal section of the well was blocked. Up the channel.
According to the characteristics of the well, the Development Research Institute of the No. 1 Gas Production Plant formulated an integrated technological plan for adopting coiled tubing drilling and milling sliding sleeves, sand washing, segmented continuous gas lift, and installation of speed pipes.
The preliminary work is ready to be completed. On August 1st, the construction party installed coiled tubing equipment, and started the coiled tubing drilling and grinding sliding sleeves and sand blasting operations. During the operation, solidified water is used as the working fluid to reduce formation leakage and ensure that a cycle can be established during the operation.
On August 6, the staged gas lift was implemented. The fixed-point gas lift was spaced once every 500 meters. The gas lift was 3000 meters below the well and no gas returned. The pressure rose to 23 MPa and failed to lift.
On August 7th, the Production Technology Division carefully analyzed the first gas lift operation, and determined that the high liquid level and high frictional resistance affect the gas lift effect. In this regard, a construction plan for gas lift was formulated, and an elite soldier was sent to command the scene. construction. The 8-hour gas lift operation, "Kung Fu does not bear the hard work", finally lifted to 2800 meters, successfully ignited. The gas test team immediately used an 8mm oil nozzle for spraying. After a 20mm orifice test, the daily gas output reached 20603 cubic meters.
The successful resumption of the well greatly inspired the technical staff's enthusiasm to continuously tap the potential to contribute to production. It also provided valuable technical measures and experiences similar to the successful resumption of difficult wells with high production fluids, which has important reference significance and guiding role.
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