1 Oilfield Geology Overview Pucheng Oilfield is a fault block oilfield with deep burial, multiple oil-bearing formations, and severe heterogeneity. The geological features are: 1.1. The majority of sedimentary oil fields have deposited six oil-bearing layers from top to bottom. The main oil layers distributed in a large area distribute in a longitudinally distributed manner along with the strips and sporadic oil layers. The inter-layer heterogeneity serious. In the case of combined production of large sections of sand-bearing formations, it is very easy to form injection water that rapidly advances along the main small stratum with good permeability, resulting in a rapid increase in water content in the entire well, while most of the strata are difficult to be fully utilized and reduce harvesting. rate.

1.2 The thickness of single-layer sediments varies greatly. Inhomogeneous layers within a layer of severe oil, the average single well bores a thickness of U2m, effective thickness is 75m, and the maximum thickness of a single layer is 25tn. The minimum thickness of a single layer is only. 4m. The oil layers characterized by sedimentation of the channel sand are all of positive rhythm and multi-parametric rhythm deposits with serious heterogeneity in the layers. Physical properties vary greatly in the longitudinal direction. The electric pump can easily cause flooding of the injected water along the bottom, the water content rises rapidly, and the middle and upper oil layers are washed poorly and the water flooding efficiency is low.

2 At present, the field of electric pump well production and energy consumption is as of December 2004. There are 863 oil wells in the Pucheng Oilfield, including 144 electric pump wells. The daily production liquid level is 18620 tons, the daily production oil level is 658 tons, and the average daily well production is 129 tons. Wells produce 4.6 tons of oil per day and 969m/0.3MPa of hydraulic fluid. The average pump efficiency is 62.5%. The electric pump accounts for 51.5% of the annual electricity consumption of the machine, while the oil production accounts for only 29% of the total output. The proportion is as high as 64%, and the annual reduction in output caused by the rise in the pump's water content accounts for 55% of the annual production decline. It is imperative to find a suitable oil recovery technology for the present stage of Pucheng Oilfield.

3 In 2004, the application of electro pumping pumping and deep pumping matching technology through the implementation of electric pump pumping and supporting process, and reasonable adjustment of liquid production structure, is one of the effective means to achieve stable oil control. We have made more reasonable adjustments to the liquid production structure. For wells with more than 90% water content, measures have been taken to control water wells, block water wells, and not to lift liquids, so as to reduce the amount of liquid produced. For wells with 8-90% water content, deep-drawing supporting technologies are used. It not only guarantees the quantity of liquid produced, but also does not intensify the contradiction between layers.

In the adjustment of the water injection structure, the injection profile is improved through the injection of water injection wells, flooding control, near solution and remote adjustment, and the degree of water drive is improved.

Deep-drawing supporting process technology mainly uses large beam pumping units of type 10 or more, high-strength sucker rods of glass steel sucker rods, and tubular pumping pumps with diameters less than or equal to the same, and applies the following deep-drawing supporting technologies: Optimize the structure of poles to ensure the reliability of use; apply string anchoring devices to increase the pumping efficiency of FRP pump rods to increase pumping depth, increase the depth of pump down 4 increase fuel consumption and reduce energy consumption. Pump pumping and pumping energy-saving effect comparison table Item Average Single Well Daily Production Liquid Average Single Well Daily Oil Production t Average Single Well Daily Power Consumption iKWh Average Single Well Production Liquid Consumption KWh/t Average Single Well Production Unit Consumption KWh/t Electric Pump Well Pumping Unit and Differential Electric Pump Compared with Pumping Well , The daily power consumption ratio is 3. After electric pump pumping, the daily production volume has dropped significantly, but due to the contradiction between the plane and the interlayer has been alleviated, and the comprehensive water content is decreasing. Before and after the single well pumping, the daily output decreased by 31. 5t/d, the water content decreased by 7.8 percentage points, and the daily production of oil increased from 4.lt/d during electric pump production to 4.5t/d, an increase of 0.4t/d. Single well production unit output from 2KWh / t, the average single well production unit oil consumption dropped from 17.2KWh / t to 64.3KWh / t, energy-saving table is significant. 22 electric pump pumping wells daily electricity saving 17000KWh, increasing daily oil 0.4t/d, according to an average of 250 days, the cumulative annual energy saving 20.3X104KWh, accumulative increase in oil lt, reduce the invalid production of liquid 17. Pump production pumping Post-Difference Work System æ›° Liquid Production Daily Production Oil Production Aqueous Work System æ›° Produce Liquid Daily Production Oil Aquifer Daily Production Liquid Daily Production Oil Aqueous Content 3-173 Electric Pump 5056.87, 486.9744X4.8X435.45.684.18-21.401.8~2. 5 Conclusions Entering High At the later stage of water development, the production volume of the oil field will show a significant upward trend. Only by adopting the oil recovery technology and its supporting technologies at the current stage of the oil field can the water control and oil stabilization target be achieved. The electric pump is an effective means of liquid extraction. But at the same time, it has the disadvantage of high energy consumption and easy to cause the water content to rise too quickly. In the selection of wells for electric pump measures, it should be carried out in accordance with the principles conducive to geological development and carefully implemented; on the basis of further improving the principle of well selection, pumping wells are deep The pumping process technology has gradually become an important energy-saving stimulation measure in the Pucheng Oilfield.

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