Increasing productivity of production wells

FIELD: oil-and-gas industry.

SUBSTANCE: proposed method consists in application of wave dilation technology. Note here that operation of pumping units in wells is synchronised, said units being equipped with wave dilation effects promoters. To ensure said synchronisation, downhole hardware is furnished with sensors for registration of elastic vibrations and channels for transmission of received signal to the surface at pumping unit operation control board. Note also that synchronisation of every pumping unit in the field is effected in frequency of signal generated pumping unit of master well.

EFFECT: higher efficiency of extraction and oil yield.

 

The invention relates to the field of oil and gas industry, namely wave technology combined effects on reservoirs to enhance hydrocarbon recovery.

A known method of wave action on the discovery of hydrocarbons (RF Patent No. 2361070, IPC E21B 43/16, publ. 10.07.2009). On the surface in a vertical and/or inclined and/or horizontal and/or branched wells place the sources of wave vibrations, created with the help of sources of wave vibrations simultaneously longitudinal and transverse waves, with which the wave impact on the environment with the hydrocarbon, the interference wave fields with the fronts set configuration formed by excitation of longitudinal and transverse waves at the points of hydrocarbon deposits with time delays proportional to the distance from the point of excitation waves to each given point deposits.

The closest in technical essence and the achieved result is technology dilatation wave action (patent No. 2261984), which is well proven in its application to individual focal wells.

The disadvantage of this technical solution is that when you try to implement this technology in several wells in one part of the oil spot is of an unforgettable positive result was not achieved. The expected increase of oil produced from each of the wells, which was implemented this technology, could not be obtained. Moreover, instead of the expected total gain from all wells, where it was installed and running their equipment DWI, additional production was much less than the expected value.

Analysis of the causes of this phenomenon showed that sucker-rod pumping units, which were equipped with focal wells for DWI, operating asynchronously, stir in the reservoir elastic waves are shifted relative to each other in phase, which ultimately leads to their out-of-phase interference and effectively nullifies the effect of the distribution in the layer of elastic waves excited by the technology DWI.

Because dilatational elastic waves propagate in the reservoir from each installation asynchronously, the time of their positive interference may occur anywhere in the field, not even matching with production well, which leads to uncontrolled "wandering" maximum dilatational effect on its area.

Object of the invention is to provide ingress doubled or even trebled) peak amplitude at positive interference in a location separate production well. This requires that the drive each pump unit began to operate synchronously with the frequency of the received signal from him specific setting rod installation located at a particular point in the field.

The problem is solved in that in the method of increasing the productivity of producing wells based on the use of technology dilatation wave impact, according to the invention in-depth equipment wells equipped with sensors recording of elastic waves and transmission channels of a received signal on the surface. On the surface is provided to synchronize the operation of the pumping unit with the frequency of the signal generated by the machine-rocking sets well.

The method is as follows. In the Central area of the field one of the production wells are equipped with the appropriate depth equipment to provide the dilatation wave action on a productive stratum. Elastic waves generated in the borehole with a frequency equal to the frequency of the pumping unit, begin to spread from a given focal wells along the layer in all directions and gradually reach the neighboring wells have similar dilatation wave equipment.

As the elastic oscillations of the corresponding neighboring wells they are captured by the sensor reception of elastic waves, located at its deepest equipment, amplified and transmitted to the surface via a wireless communication channel in the Cabinet councils is possible by operation of the pumping unit, the actuator which is synchronized to the received signal and actuates the machine-rocking with the oscillation frequency corresponding to the frequency of the received oscillations.

This ensures synchronization of all other pumping units located on the field at some distance from the focal sets of the well.

Elastic oscillations with the frequency specified by the machine-rocking focal wells, spreading, productive stratum, capture their influence more and more wells equipped with machines-rocking chairs, similar to the phenomenon, similar to the "chain reaction", when each subsequent hole becomes similar to the first focal wells.

All wells start to run synchronously with the frequency of the first sets of wells. Such synchronous operation causes a positive interference of waves propagating along the layer, the consequence of which is doubling and even tripling the amplitude of elastic waves in the reservoir and especially in the critical zone of each well, which will increase its productivity. The more will increase the amplitude of the elastic waves, the greater the increase in productivity.

The way to increase the productivity of producing wells based on the use of technology dilatation wave impacts the via, notable deep equipment wells equipped with sensors recording of elastic waves and transmission channels of a received signal to the surface where it is provided to synchronize the operation of the pumping unit, which are installed in each well, with the frequency of the signal generated by the machine-rocking sets well.



 

Same patents:

FIELD: oil-and-gas industry.

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1 tbl, 1 dwg

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2 dwg

FIELD: mining.

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FIELD: physics; geophysics.

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FIELD: oil and gas industry.

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FIELD: oil-and-gas industry.

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FIELD: oil-and-gas industry.

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1 tbl

FIELD: oil and gas industry.

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FIELD: oil and gas industry.

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19 cl, 4 dwg

FIELD: oil and gas industry.

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1 ex, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: vertical injector and a horizontal producer are drilled, working fluid is injected to the injector and the product is extracted from the producer. A horizontal section of the producer is left uncased and placed above the oil-water level - in the middle interval of the oil saturated zone of the deposit. The injector is constructed till the oil saturated zone of the deposit is opened at the distance from the producer bottomhole that excludes breakthrough of the working fluid to the producer. In the producer a process pipe is installed that consists of in-series perforated nozzles with centralisers and water-swelling packers placed in-between so that they can close a tubular annulus hermetically if water content in the product exceeds 50%. During operation of the producer when the product is watered up to 90-95% the process pipe is cut off from the bottomhole opposite the respective packers.

EFFECT: improving production rate of the deposit, efficiency of oil displacement, increasing coverage area by the displacement agent due to its consistent workout, reducing water-content in the product.

1 ex, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: during development of oil pool at least a part of wells with horizontal or inclined curve boreholes is made. Injection of a working fluid is made through injectors and oil extraction is made through producers. Operations are made at sections where collectors have natural fracturing and thickness less than 5m, they are placed at a distance of 6m from the water-saturated formation. The horizontal curve borehole is made as per the curved trajectory with its curve in azimuth with intensity up to 4/10m and length providing the cross-section of the fracturing direction under angle from 0 up to 90 degrees.

EFFECT: higher oil recovery of the deposit.

1 ex

FIELD: oil extractive industry.

SUBSTANCE: method includes electro-hydraulic treatment of bed at resonance frequency and extraction of oil from bed. According to invention bed is excited by resilient pulses at broad frequency range from 0 to 10 kHz. Frequencies are set, at which bed is treated. Resonance frequency is kept by singular, periodical, radially focused electro-hydraulic pulses with generation frequency, divisible by bed resonance frequency. Concurrently in adjacent well bed excitation frequency is controlled by resilient pulses and corrected according to measurements results.

EFFECT: higher efficiency.

2 dwg

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