The way of the development of oil deposits

 

The invention relates to the oil industry and can be used in the development of multilayer oil deposits. The technical result of the invention is to improve the effective management of technological process of extraction of oil from several productive strata through one hole. To do this, before the descent of the pump installed in the well above each of the productive formation mounted on the packers debitory with a local power source. Depending on the readings debitoren while reducing the selection of oil from a reservoir handle the bottom zone of this layer and change the mode of discharge of the working agent in unsatisfactory working layer. If necessary, debitmetre raise to the surface and is determined by the mathematical dependences selection of oil from each reservoir. 1 C.p. f-crystals, 2 Il.

The invention relates to the oil industry and can be used in the development of multilayer oil fields.

There is a method of oil-field development, including the selection of oil through the production wells from the reservoir, sampling formation water from videosdog byvania flow lines of water wells, redistribution of injection of produced water by studying the inlet piping to the injection well, and when you stop one or more wells are production produced water from other wells and injection into the injection well through the looped pipeline and Stolbovaya inlet to the injection wells, pipelines, while the injection of produced water centrifugal pumps with total capacity of slightly less total injectivity of injection wells, and the loopback and choke restriction provide redistribution and limit the injected volume of the working agent to the level of performance of electrical submersible pumps (Patent RF 2177537, CL E 21 In 43/20, 2001).

The disadvantage of this method is low efficiency of selection at lower reservoir pressure, as well as the lack of information on the flow rate required for control of technological process of selection.

There is also known a method of developing oil fields, including

the selection of oil from the reservoir through the production wells with pumping systems and pumping the working agent through the discharge SK the com method is the low efficiency of management of technological process of extraction of oil from several productive strata through one hole, due to the absence of incomplete information about the rate of individual layers.

The present invention is that it is necessary to create such a method of development of oil deposits, which would provide the maximum possible control of technological process of extraction of oil from several productive strata through one hole.

The technical result consists in increasing the efficiency of management of technological process of extraction of oil from several productive strata through one well (based on the selection of oil from each layer of the multilayer reservoir through one hole and making decisions about the treatment of bottom-hole formation zone (PPP) or changing the mode of influence of the injection wells.

This technical result in the implementation of the claimed invention are described by way of the prototype, including the selection of oil from the reservoir through the production wells with pumping systems and pumping the working agent through the injection well, what's new is that while the selection of oil through one hole of several productive strata to the descent of the pump installed in the well consistently descent is constituent of a layer, the number of debitoren equal to the number of productive layers, each debitor equipped with an Autonomous power source and connected to it by the electronic counter and memory unit, then depending on the readings debitoren while reducing the selection of oil from a reservoir handle the bottom zone of this layer and change the mode of discharge of the working agent in neudovletvoritelnye working layer.

The amount taken from each reservoir of oil for a fixed period of time, determined after lifting debitoren on the surface according to the formula:

Qi=Qdi-Qdi-1,

where Qithe flow rate of the i-th layer, m3/day;

Qdiand Qdi-1- readings debitoren located respectively above and below the i-th layer, m3/day.

Depending on the indication of debitoren perform clearance of bottom-hole zones and changing the mode of discharge of the working agent in the layers.

When you have a summary of flow meter on the surface of the upper debitor can not be lowered into the well.

In Fig.1 presents a diagram of the method for the development of oil deposits.

In Fig.2 - shows a General view of deutonura.

The scheme implemented in blennie thus, using packers 6, 7 and 8 in the casing 9 above the productive layers 10, 11 and 12. Casing 9 at the level of the productive layers 10, 11 and 12 has the perforations 13, 14 and 15.

As debitoren 3, 4 and 5 can be used, for example, rotary debitory (Fig.2) containing the impeller 16 which is connected through a magnetic clutch 17 and the induction inverter speed of the impeller 18 with electronic counter and memory unit 19, made in the form of a microprocessor. Debitory 3, 4 and 5 is also equipped with electronic clock 20 and Autonomous power supply 21 connected to an electronic counter 19 and e-20 hours. All elements of debitoren 3, 4 and 5 (except the impeller 12) installed in a sealed housing 22.

The method implements the following way. Before the descent of the pump unit 1 in the hole consistently down debitory 3, 4 and 5, which are mounted by means of packers 6, 7 and 8. Debitory 3, 4 and 5 installed in the inter-layer space above controlled productive layers 10, 11 and 12. After the descent and turn on the pump unit 1 flow of oil from the reservoir 10, 11 and 12 flows through the perforations 13, 14 and 15 in the casing 9, where, bypassing debitory 3, 4 and 5, is input to the pump unit 1 and further along the tubing to the surface. PTO Converter 17 18 speed into electrical impulses, which are fixed by the electronic counter and memory unit 19. Electronic clock 20 is fixed, the time counter 19. The ratio of the number of pulses to the time of its accumulation is proportional to the flow rate of oil from the reservoir. Moreover, the flow rate of the reservoir 10 is equal to the testimony of deutonura 3, the flow rate of the reservoir 11 is equal to the difference of the readings debitoren 4 and 3, and the flow rate of the reservoir 12 is equal to the difference of the readings debitoren 5 and 4.

With a considerable reduction of the total flow rate measured at the surface, for example, by means of a measuring installation Sputnik (not shown), or in the repair of the pump unit debitory retrieved to the surface after processing (interpretation) data debitoren determine the average oil production rate for the control period of each layer. When you have a summary of meter flow rate measured at the surface, the upper debitor can not be lowered into the well.

In the event of detection of a significant reduction in the selection of oil from a reservoir handle the bottom zone of this layer and change the mode of discharge of the working agent in unsatisfactory working layer.

Thus, controlling the selection of oil from each layer of the multilayer deposits and adoption based on the HN will provide more effective development of an oil field.

Claims

1. The way of the development of oil deposits, including the selection of oil from the reservoir through the production wells with pumping systems and pumping the working agent through the injection wells, characterized in that while the selection of oil through one hole of several productive strata to the descent of the pump installed in the well consistently lower the downhole flowmeter and install them on the packers in the inter-layer space above each of the controlled reservoir, the number of debitoren equal to the number of productive layers, each debitor equipped with an Autonomous power source and connected to it by the electronic counter and memory unit, then depending on the readings debitoren while reducing the selection of oil from a reservoir handle the bottom zone of this layer and change the mode of discharge of the working agent in unsatisfactory working layer.

2. The method according to p. 1, characterized in that the amount taken from each reservoir of oil for a fixed period of time determined after lifting debitoren on the surface according to the formula:

Qi=Qdi-Qdi-1,

hi-th layer, m3/day;

Qdi-1- readings debitmetre located below the i-th layer, m3/day.



 

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FIELD: oil extractive industry.

SUBSTANCE: method includes lowering a tail piece into well with temperature, electric conductivity and pressure sensors placed on tail piece along its length. Pressure sensors are used in amount no less than three and placed at fixed distances from each other. After that, continuously during whole duration of well operation between maintenance procedures, temperature, conductivity of well fluid, absolute value of face pressure and difference of pressures along depth of well in area of productive bed are recorded. Different combinations of pairs of pressure sensors are used for determining special and average values of well fluid density. When absolute pit-face pressure is lower then saturation pressure for well fluid by gas and/or when average values of density deviate from well fluid preset limits and/or when its conductivity deviates from preset limits, adjustment of well operation mode is performed.

EFFECT: higher efficiency, higher safety.

2 cl

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