Oil-bearing bed development method and equipment for group pumping station with oil deposit zone

FIELD: oil production industry, particularly oil deposit development.

SUBSTANCE: method involves pumping working agent, namely water, in two stages. The first stage is performed with the use of power pumps. The second one is carried out by means of hydraulic measuring pumps, which are used to convert injection pressure created by power pumps. If it is necessary to increase pressure in water lines used to deliver water to separate injection wells pressure is regulated in accordance with necessary water volume to be injected in wells on the base of collecting properties of oil formations in bottomhole formation zones. This is performed by providing change in pump piston diameter and stroke ratios in the first and the second sections of hydraulic measuring pumps, which are selected on the base of hydraulic resistance variation depending on water flow velocity. Parameters characterizing injection system operation are simultaneously measured and efficiency of the method and equipment operation is detected from above characteristics.

EFFECT: increased efficiency of oil bed development due to energy-saving equipment and technique usage for formation pressure maintaining.

2 cl, 2 dwg

The method relates to the oil industry, namely for water injection into oil reservoirs to maintain them in optimum pressure values.

It can be used in other sectors of the economy, for example, for the extraction of water from artesian wells. A known method of injection working agent - water from the well pumping stations in injection wells with high pressure pumps and performance, which water wells distributed in the distribution nodes [1].

The main disadvantages of this method are:

1. The high cost of electricity due to the use of both electrical and mechanical equipment of large capacity.

2. The inability to control the pressure and volume of the injected water in individual wells in the required amount to maintain in the oil-bearing formation for the optimal amount of pressure.

3. The impossibility of accurate and continuous measurement and recording of injected water in a separate injection well, and therefore, pumped water through the Bush in General, wikido power pump maintains a high pressure on the basis of rational volume of injected water in wells located in areas of the reservoir with low ratios of response that is accompanied by irrational use the using of electricity.

4. Large capital and operational costs, especially in the development of small oil fields for a short time, because of the impossibility of operative travel of the constructed buildings.

The closest technical solution is the method of injection into the injection well water with the use of modular cluster pump stations - MCPS [2].

The disadvantages of the method and equipment used are the same points mentioned in similar, except for the possible relocation of modular equipment.

The aim of the invention is to increase the efficiency of development of oil-bearing formations by introducing energy-saving equipment and technologies in the system of reservoir pressure maintenance.

This goal is achieved by the way in which to reduce the specific consumption of electricity producing transformation pressure generated power pumps installed on MCPS, which on MCPS connected in series to power the pumps, of which water is supplied into the distribution block on the common discharge pipe, after the distribution node to the water pipes leading to the individual injection well or group of wells, with approximately the same coefficients pickup, install two hydraulic pumps-meters, in which permanence performs the function of a hydraulic motor and meter of pumped water, and the second section is a function of the booster pump in which the amount by which increases the discharge pressure is determined by the area ratio of the cross sections of the pistons of the first and second sections, which must ensure the optimal injection volume of water in the reservoir taking into account flow resistance in the entire injection system and the pressure loss in the hydraulic pump-probe, respectively, which changes for pumping choose the electric motors to power the pumps with some reserve capacity, the effectiveness of established modes determined based on the specific values of the power consumption measured by the meter, and the volume of the pumped product itself hydraulic pump-gauge - the number of the reciprocating translational motions, the diameter and length of stroke of the plunger in the first section, the total amount of pumped water power pump is defined as the sum of its individual hydraulic pumps-power meter.

The method is achieved by the proposed equipment and the scheme of arrangement in the cluster pump stations (1, 2), which consist of pumps, forming two stages of pumping, the first step consists of the power of centrifugal or reciprocating pumps driven work motor, the second stage is the hydraulic pumps and mericli, each of which is set at the beginning of the water line going to the individual injection well after a distribution site, which consist of two sections that perform the function of conversion of hydraulic energy to the desired optimal values of discharge pressure, carried out by selection of the ratio of the diameters of the first section, and performs the function of measuring the volume of the pumped product and hydraulic motor and a second section, perform the function of a booster pump, allowing to increase the pressure of the pumped working agent - water up to a certain value and adjust its performance to the optimal value, which is ensured by selection of specific sections consisting of a pair of cylinder-piston interconnected the sealing chamber, the common stock and receiving and discharge pipes rational diameter, excluding the occurrence of significant local resistance, and wikid booster section to the discharge water, and then the column of the discharge pipe in the well, while the operation of hydraulic pumps and measuring the required parameters characterizing the modes of the system "pumps - water supply wells", produced by the hydraulic pump-gauge, gauges, pressure and temperature is s, and management - on signals received from sensors: position sensors, locking the reciprocating movement of the pistons in the hydraulic sections of the pump-probe from a control unit, which can be either in individual and group block areas block pumping station, which also set the meters, indicators are transmitted to controller, where they are handled by separate programs in computer devices, which determine the efficiency of the pumping system, with all the pumping system to ensure operation on rational mode prevents air bubbles and pressure relief valves connected to receiver lines and the tanks, which is reset in cases of violation of the mode of operation of the system, excess fluid, and therefore, discharges and excessive pressure.

The invention differs from the prototype in that injection of the working agent in injection wells used energy-saving technology, which consists in a two-stage injection working agent - water produced in the first stage power pumps with specific performance and pressure, transformed later in hydraulic pumps-meters, representing the second stage pumping, allowing avisit the discharge pressure in the wells to the value required to pump a certain volume of water sufficient to maintain the rational pressures in the developed areas of oil-bearing strata, which consist of two sections: the first performs the functions of a hydraulic motor and meter of pumped water, the second function of the booster pump, in which the transformation of the hydraulic power pressure is achieved by using the diameters of the pistons and the length of their stroke in the first and second sections of certain ratios, which provide for the injection of the required amount of water and the possibility of its regulation with possible changes of geological and technical conditions of injection wells and development in certain areas of oil-bearing deposits.

These characteristics allow us to conclude that the claimed invention are connected by a single inventive concept.

Comparison of these proposed technical solutions with priority allowed to establish their compliance with the criterion of "novelty".

The study of other technical solutions in the fields of engineering and technology distinguished the claimed invention from the prototype were not identified and therefore they provide the claimed technical solution according to the criterion of "significant differences".

The method is carried out (Fig.) the equipment, consisting of silovikigreatly 1 engine 2 suction and discharge piping 3, 4, a distribution unit 5, foster piping 6, the hydraulic pumps 7 meters, including the piston 8, the receiving and discharge line 9, rods 10, the sealing of the chambers 11, the cylinders of the first and second stages 12 and 13 installed in a separate block areas, measuring sensors, transducers controls, locking devices 16, injection wells 15, the discharge of water to wells 14.

The method is as follows.

The area is calculated develop oil deposits, which is based on the design of sampling formation products determine the volumes of water that must be pumped into the reservoir to maintain a certain pressure in it the optimal value.

Next, determine the number of injection wells, their location, and by injectivity of the wells, the amount of water that must be pumped into a well, set the value of the working pressure, which should be maintained at the mouths of the wells with low permeability, determine if any pressure at receptions in their first section and uicide second section provides the maximum increase in pressure. Thus, define rational increments of pressure on all injection wells, which must be connected to proector the emnd MCPS, and maximum values of the pressure, which must be supported on the first section, with a certain reserve as performance and pressure, determine the magnitude of the pressures on their vikitech.

Next, with regard to growth pressures in the hydraulic pumps-measurement and at rated output power pumps choose the motor of appropriate power with a certain reserve as performance power pumps and power of the motors to compensate for possible changes in the process operation.

During operation of the injected water in a separate injection wells measured hydraulic pumps, meters, at the same time are also measured in time the electricity consumed electricity, which allows to determine the effectiveness of the established modes of operation of individual wells, installed equipment, and pumping station as a whole.

The proposed equipment the pumping system operates as follows.

Water is pumped out of power pumps 1 specific volume under rational pressure flow line enters the distribution node 5, from which it is sent by separate pipes to the injection wells, which establish water is practical pumps-7 meters. In this case, the distribution node and pumps gauges are placed in a separate distribution measuring unit, in which, in addition to the distribution of water to individual water lines is also in hydraulic pumps-meters transformation pressure from a smaller to a larger one with the rational performance with simultaneous measurement of the volume of injected them with water in the reservoir.

The optimal set of system modes discharge is established on the level of selections produced products, to ensure optimal values of reservoir pressure, injection into the reservoir of the working agent, at the lowest possible cost, i.e. at the established permanent cost saving rational values of variable costs, or the cost of electricity, which more accurately characterizes the efficiency of measures taken.

Management and control system of water injection into the reservoir is made with a control unit and control which receives signals from the equipment. The control over the observance of the operation modes is performed in a separate injection wells, and throughout pumping station.

With dimensions of pumped water through a separate injection well is am are in the first section of the hydraulic pumps meters according to the formula:

when the system is installed only single-volume meter, or by the formula:

where l₂=l₁+Δl_PCs,

where l₂the elongation of the rod in the second section of reduced diameter of the piston;

V₂- the measured water volume during the course of the piston in the forward direction.

The measured water volume in the reverse direction is determined by the formula:

V_total=(V₁+V₂n - the total amount of water pumped out one hydraulic pump-meter.

Then total all of the injected water into the reservoir on the hive is defined as the amount of injected water in individual wells connected to the Bush pump station:

When measuring the volume of injected water wells, pressure sensors and temperature are also measured pressures at the input and at the output of the hydraulic pump gauges and temperature of the pumped water.

Also measured by Bush electricity total electricity consumption and to determine the changes of the energy consumed by a separate injection well considering its losses in some parts of the system: power pump - injection wells - oil dps the article, that carried out periodically according to changes of pressure in some parts of the system research teams.

Sources of information

1. The method of pumping a gas-liquid mixtures, gases and liquids with the use of natural potential energies and device for its implementation. Patent for invention No. 2134772 from 20.08.99, Bulletin No. 23.

2. Vierow. The technology of oil production. - M.: Nedra, 1983, p.55, 61.

1. The way to develop oil-bearing strata, which consists in the reduction of specific consumption of electricity, and, therefore, reducing the power of the electric motor of the pump, continuous measurement, accounting and regulation of the volume of the injected water by individual wells and in the whole pumping station, and establishing them in the discharge pressures of the oil-bearing formation in the area of operation of the well, characterized in that the pumping station to reduce the discharge pressure, and, consequently, to reduce the specific consumption of electricity producing transformation pressure generated power pumps that are installed on the cluster pump stations, for which cluster pump stations connected in series to power the pumps, of which water is fed into the distribution block on the common discharge pipe, after distribution in the aircraft on the water, going to a separate injection well or group of wells, with approximately the same pickups, install two hydraulic pumps-meters, in which the first section performs the function of a hydraulic motor and meter of pumped water, and the second section is a function of the booster pump in which the amount by which to increase the pressure, determined by the area ratio of the cross sections of the pistons of the first and second sections to provide a water injection taking into account flow resistance in the entire injection system and the pressure loss in the hydraulic pump, respectively, which changes for pumping choose the electric motors to power the pumps with some reserve capacity, the effectiveness of the installed operating modes determine, based on the values of specific electricity consumption, which is measured in meters, and the volume of the pumped product is measured by the hydraulic pump is a measure of the number of reciprocating movements, the diameter and the length of stroke of the plunger in the first section, the total amount of pumped water power pump is defined as the amount of the individual hydraulic pumps-power meter.

2. Equipment and their location on the pumping station at the site and develop atalaimage oil field, including the Bush pump station, placed in her power pumps, flow pipelines, distribution nodes and laid before injection wells discharge water supplies, control modules and control, characterized in that the pumps on cluster pump stations consist of pumps, forming a two-stage pumping: the first stage consists of a centrifugal or reciprocating pumps driven work motor, the second stage is a hydraulic pump gauges, each of which is mounted on top of the water going to a separate injection well after a distribution site, which consist of two sections that perform the function of conversion of hydraulic energy to certain required values of discharge pressure, carried out by selection of the ratio of the diameters of the first section, performing the functions of the flow meter and hydraulic motor, and a second section, perform the function of a booster pump, allowing to increase the pressure of the pumped water to a certain value and adjust its performance to a certain value, which is ensured by selection of specific sections, stem and receiving and discharge pipes, and wikid booster section with the injection water, next column injection pipes, h is confined in the well, while the operation of hydraulic pumps and measuring the required parameters characterizing the modes of the system "pumps - water - well", provided by the control unit, dimensions and operation on the signals of the detectors of the position of the pistons in a reciprocating their movement in individual and group block the premises where installed electricity meters with the possibility of transmission in the controller for processing program in the computer device and determining the efficiency of operation of the entire injection system.