KR101995822B1 - Movable smart water system - Google Patents

Abstract

The present invention relates to a movable smart water system capable of improving oil recovery efficiency. According to an embodiment of the present invention, the movable smart water system comprises: an oil separator for separating an oil included in produced water; a high-rate coagulative precipitation unit for removing particulate matter contained in the produced water supplied from the oil separator; a primary storage tank for storing the treated water discharged from the high-rate coagulative precipitation unit; an ion material removing device for removing salt by filtering the treated water discharged from the primary storage tank; a secondary storage tank for storing the treated water discharged from the ion material removing device; and a smart water device for manufacturing smart water by injecting ions into the treated water discharged from the secondary storage tank.

Description

[0001] Movable smart water system [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile smart water system, and more particularly, to a mobile smart water system that enables economical operation according to the properties of an influent produced water.

To produce crude oil (petroleum), drilling and drilling operations are required. First, in order to produce crude oil (petroleum), the location, size and nature of the reservoir are estimated based on the exploration result after exploration of the surface or the seabed and the presence of crude oil (petroleum) is confirmed based on this. Then, in order to obtain additional precise underground information, a drilling operation is carried out by drilling a hole in the underground. This is called drilling exploration. Drilling is the drilling of soil and rock through the rotation of the ground using a rotary excavator called a bit. If crude oil (petroleum) is found during the drilling process, it will be converted to the development and production stage. There is a production facility called the Christmas tree that extracts crude oil (petroleum) and gas from the ground, and a platform is installed on the sea to produce crude oil.

Oil wells are naturally spewed up by the pressure of water under the gas or crude oil (oil) at the beginning of production. This is often called self-injection. Unless reservoirs are very shallow, crude oil (petroleum) generally flows well underground at the beginning of production, but as the pressure in the reservoir decreases over time, the production of natural oil (petroleum) Most of the crude oil (petroleum) is stored in the reservoir without production.

The production of crude oil (petroleum) by natural spontaneous ejection by pressure in the oil layer is called the first recovery. The crude oil (petroleum) produced by the first recovery is only 5 ~ 15% of the reserves. The remainder is forced to gas oil (gas injection) and water injection (water attack) to recover crude oil (petroleum), which is called the second recovery.

This second recovery is called Enhanced Oil Recovery (EOR). As the existing oil reserves are rapidly depleted and aging, the growth of the chemicals market used for the recovery of crude oil is accelerating. In particular, in the US and Europe, the demand for energy is steadily increasing although the depletion of oil reserves is becoming serious. Since the oil reserves in these two regions have already reached maturity and the extraction of petroleum is becoming increasingly difficult, and because considerable reserves of oil can not be produced economically and are still buried underground, the importance of highly efficient oil recovery enhancement technology More and more.

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Korean Patent Publication No. 10-2013-0022193

Problems to be solved by the present invention are as follows.

First, it is intended to provide a mobile smart water system capable of improving the oil recovery efficiency through the smart water-low salt water production method.

Secondly, the filtration route can be changed according to the nature of the influent production water, so that economical operation is possible.

Third, it is intended to provide a smart water system that can be compactly designed to facilitate movement.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, a mobile smart water system according to an embodiment of the present invention includes an oil separator for separating oil contained in produced water; A high-rate coagulative precipitation unit for removing particulate matter contained in the produced water supplied from the oil water separator; A primary storage tank for storing the treated water discharged from the high-speed flocculation and sedimentation apparatus; An ion material removing device for filtering the treated water discharged from the primary storage tank to remove salts; A secondary storage tank for storing the treated water discharged from the ion material removing apparatus; And a smart water device for producing the smart water by injecting ions into the process water discharged from the secondary storage tank.

The details of other embodiments are included in the detailed description and drawings.

According to the mobile smart water system of the present invention, there are one or more of the following effects.

First, the salt contained in seawater can be removed, and ions that facilitate the recovery of oil can be injected to improve the oil recovery efficiency.

Secondly, it is possible to operate economically by changing the filtration method according to the nature of the imported production water.

Thirdly, the size of the desalination device can be designed to be small, and it is easy to move.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

FIG. 1 illustrates the concept of improving the wettability of a mobile smart water system according to an embodiment of the present invention.
FIG. 2 is a schematic representation of the configuration of a mobile smart water system according to an embodiment of the present invention.
FIG. 3 shows the configuration of the ion-material removing apparatus of FIG. 2 in detail.
4 is a block diagram of a mobile smart water system according to an embodiment of the present invention.
FIG. 5 shows the filtration flow of treated water when the value measured by the TDS sensor is A or less.
FIG. 6 shows the filtration flow of the treated water when the value measured by the TDS sensor exceeds A and B or less.
FIG. 7 shows the filtration flow of treated water when the value measured by the TDS sensor exceeds B and is less than or equal to C. FIG.
Figure 8 is a representation of the filtration flow of treated water when the measured value in the TDS sensor exceeds C;

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings.

The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Hereinafter, the present invention will be described with reference to the drawings.

Enhanced Oil Recovery (EOR) is a technique to further produce residual oil in the reservoir after applying the hydraulic method. The oil remaining in the rock layer can remove salts contained in seawater and improve the oil recovery efficiency by injecting ions that facilitate the recovery of the oil. The oil production and the production of oil include oil and a large amount of salt. The production water is injected into the rock bed again, and the injected production water flows into the rock layer to increase the pressure of the reservoir layer to increase the amount of residual oil.

FIG. 1 illustrates the concept of improving the wettability of a mobile smart water system according to an embodiment of the present invention.

Referring to FIG. 1, calcium ions and magnesium ions improve the wettability and increase the fluidity of the oil. It is desirable to remove the large amount of sodium ions contained in the production water prior to the injection of calcium and magnesium. Smart Water is a process that removes large amounts of monovalent and divalent salts contained in production water and increases calcium and magnesium.

2 is a schematic representation of the configuration of a mobile smart water system according to an embodiment of the present invention.

Referring to FIG. 2, a mobile smart water system according to an embodiment of the present invention includes an oil separator 100 (Oil Separator) for separating oil contained in produced water; A high-rate coagulative precipitation unit 200 for removing the particulate matter contained in the produced water supplied from the oil water separator 100; A primary storage tank 300 storing the treated water discharged from the high-speed flocculation and precipitation apparatus 200; An ion material removal device 400 for filtering the treated water discharged from the primary storage tank 300 to remove salts; A secondary storage tank 500 storing the treated water discharged from the ion material removal apparatus 400; And a smart water device 600 for manufacturing the smart water by injecting ions into the process water discharged from the secondary storage tank 500.

The oil water separator 100 is a device for collecting oil separately by separating a mixture of recovered water and oil. The oil water separator 100 can use gravity or centrifugal separation using a density difference.

The high-speed coagulating sedimentation apparatus 200 is capable of performing each operation of agitation, agglomeration, and sedimentation in one settling basin, which has advantages of shortening the settling time, reducing the amount of medicines used, securing a high quality purified water, .

The ionic substance removing apparatus 400 removes monovalent salts and divalent salts contained in the treated water. A detailed description of the ion material removing apparatus 400 will be described later.

The smart water device 600 includes an ion sensor 730 for measuring the concentration of calcium ions and magnesium ions in the treated water; And an ion implantation device for injecting different amounts of calcium ions and magnesium ions according to the measured values of the ion sensor 730. The ion implantation apparatus injects an appropriate amount of calcium ions and magnesium ions into the treatment water according to the measured ions.

FIG. 3 is a detailed representation of the configuration of the ion material removing apparatus 400 of FIG. 4 is a block diagram of a mobile smart water system according to an embodiment of the present invention.

3 and 4, the ion material removing apparatus 400 includes a crystallization apparatus for depositing a salt contained in the treated water discharged from the primary storage tank 300; A nanofiltration device 420 including a nanofiltration membrane (NF) for filtering the treated water discharged from the primary storage tank 300; A reverse osmosis unit 430 including a reverse osmosis membrane RO for filtering the salt contained in the treated water discharged from the primary storage tank 300 by a reverse osmosis method; A CDI (capacitive deionization) device for removing the salt included in the treated water discharged from the primary storage tank 300 by a charge and desalination process; A TDS sensor 710 for measuring TDS (Total Dissolved Solids) of the treated water discharged from the primary storage tank 300; And a control unit 700 for controlling a flow path connecting the crystallization unit 410, the nanofiltration unit 420, the reverse osmosis unit 430 and the CDI unit 440 according to the measured TDS.

In this embodiment, the crystallization apparatus 410 is provided with a cooling crystallization apparatus 410 for cooling the supplied treated water with a cold crystallization can to deposit an inorganic salt crystal of interest, an evaporation crystallization apparatus 410 or a recrystallization apparatus Can be used.

Membrane can be classified into four types according to the pore size: microfiltration (MF), ultrafiltration (UF), nanofiltration (NF), and revere osmosis (RO)

The nanofiltration apparatus 420 according to an embodiment of the present invention includes a nanofiltration membrane.

The nanofilteration is intended to remove substances such as small organic matter of 0.5 to 1 nm or polyvalent ions such as calcium and magnesium. The nanofiltration unit 420 operates at a lower pressure than the reverse osmosis unit 430. Nanofiltration membranes are characterized by their ability to remove divalent ions but allow them to permeate monovalent ions. The nanofiltration apparatus 420 has a salt removal rate of 90% or more.

The reverse osmosis device 430 according to an embodiment of the present invention includes a reverse osmosis membrane. RO membranes, called reverse osmosis membranes, are mainly used to remove particles from 0.2 to 0.5 nm in order to remove ions in the treated water. The reverse osmosis device 430 has a higher sodium chloride removal rate than the nanofiltration device 420.

The CDI device 440 is a desalination device capable of reversibly performing adsorption and desorption by changing the electrode potential as a technique to which an electrical driving force is added to the adsorption and ion exchange mechanisms. The CDI device 440 operates at a low potential (about 1 to 2 V) because it utilizes the adsorption reaction of ions by electrical attraction in the electrical double layer of the electrode surface when a potential is applied, resulting in low energy consumption. It is preferable that the CDI device 440 is disposed at the rear end of the crystallizing device 410 and the nanofiltration device 420 because the removal efficiency of ions is not high. Since the CDI device 440 does not use a chemical agent during the regeneration, it can be easily sucked and desorbed by electrical operation without generating secondary pollutants, which is economical and easy to operate.

The ion material removing apparatus 400 includes a crystallization supply pipe 411 connecting the primary storage tank 300 and the crystallization apparatus 410; An NF supply pipe 421 connecting the primary storage tank 300 and the nanofiltration unit 420; And a supply valve 451 disposed at a branch point between the crystallization supply pipe 411 and the NF supply pipe 421 to control the flow passage.

The ion material removing apparatus 400 includes a crystallization discharge pipe 413 flowing in the process water discharged from the crystallization apparatus 410 and connected to the crystallization apparatus 410; A double filtration pipe 415 for connecting the crystallization discharge pipe 413 and the nanofiltration device 420 to supply the treated water to the nanofiltration device 420; And a double filtration valve 453 disposed at a branch point between the double filtration pipe 415 and the crystallization discharge pipe 413 to control the flow passage.

The ion material removing apparatus 400 includes an NF discharge pipe 423 connected to the nanofiltration unit 420 and flowing through the treated water discharged from the nanofiltration unit 420; A CDI feed pipe 441 connected to the NF discharge pipe 423 and the CDI device 440 to supply the process water to the CDI device 440; An RO supply pipe 431 connected to the NF discharge pipe 423 and the reverse osmosis unit 430 to supply the treated water to the reverse osmosis unit 430; And an NF discharge valve 457 disposed at a branch point between the NF discharge pipe 423 and the CDI supply pipe and the RO supply pipe 431 to control the flow passage.

The ion material removing apparatus 400 includes an integrated discharge pipe (not shown) for connecting the double filtration valve 453, the NF discharge valve 457 and the secondary storage tank 500 to supply the treated water to the secondary storage tank 500 425).

The ion material removal apparatus 400 includes a CDI discharge pipe 443 connecting the CDI device 440 and the secondary storage tank 500 to supply treated water to the secondary storage tank 500; And an RO discharge pipe 433 connecting the reverse osmosis unit 430 and the secondary storage tank 500 to supply the treated water to the secondary storage tank 500.

FIG. 5 shows the filtration flow of the treated water when the value measured by the TDS sensor 710 is A or less.

5 and 4, when the measured TDS is equal to or less than the predetermined value A, the controller 700 flows part of the treated water to the crystallization supply pipe 411, and the remainder of the treated water is supplied to the NF supply pipe And the treated water discharged from the crystallization apparatus 410 and the treated water discharged from the nanofiltration apparatus 420 are all supplied to the secondary storage tank 421 through the integrated discharge pipe 425, And controls the double filtration valve 453 and the NF discharge valve 457 so as to be supplied to the double filtration valve 500. As a result, the life of the ionic material removing apparatus 400 could be increased by maintaining the filtration performance at about 5,000 ppm.

6 is an illustration of the filtration flow of treated water when the value measured by the TDS sensor 710 exceeds A and B or less.

Referring to FIGS. 6 and 4, when the measured TDS exceeds the predetermined value A and is equal to or less than the predetermined value B, the controller 700 controls the flow of the process water discharged from the primary storage tank 300 to the crystallization apparatus 410 And controls the double filtration valve 453 so that all of the process water discharged from the crystallization device 410 flows to the double filtration pipe 415 and the process discharged from the nanofiltration device 420 Controls the NF discharge valve 457 such that all of the NF discharge valve 457 flows to the CDI device 440. [ As a result of experiment B, it was possible to increase the lifetime of the entire ion-material removing apparatus 400 while keeping the filtering performance at about 10,000 ppm.

7 shows the filtration flow of the treated water when the value measured by the TDS sensor 710 exceeds B and C or lower.

Referring to FIGS. 7 and 4, when the measured TDS exceeds the predetermined value B and is equal to or less than C, the control unit 700 controls the flow of the process water discharged from the primary storage tank 300 to the crystallization apparatus 410 And controls the double filtration valve 453 so that a portion of the process water discharged from the crystallization device 410 is branched to the double filtration pipe 415 and the remainder flows to the integrated discharge pipe 425 And the treated water discharged from the nanofiltration apparatus 420 controls the NF discharge valve 457 to flow to the CDI apparatus 440. [ As a result of experiment, it was possible to increase the lifetime of the entire ion-material removing apparatus 400 while maintaining a substantially constant filtration performance by setting C to 30,000 ppm.

FIG. 8 shows the filtration flow of the treated water when the value measured by the TDS sensor 710 exceeds C. FIG.

8 and 4, when the measured TDS exceeds the predetermined value C, the controller 700 controls the supply of the process water discharged from the primary storage tank 300 to the crystallization device 410 Controls the valve 451 and controls the double filtration valve 453 so that all of the process water discharged from the crystallization device 410 flows to the double filtration pipe 415. The treated water discharged from the nanofiltration device 420 All control the NF discharge valve 457 to flow to the reverse osmosis unit 430. [ As a result of the experiment, if C exceeds 30,000 ppm, it is possible to produce a low-salt treatment water capable of improving the wettability by removing the salt through the reverse osmosis unit 430.

The effect of the mobile smart water system according to the present invention is as follows.

First, the treated water flows into the ion material removing apparatus 400 through the primary storage tank 300. The TDS sensor 710 measures the TDS of the treated water. The control unit 700 controls the supply valve 451, the double filtration valve 453, and the NF discharge valve 457 based on the measured TDS.

Since the crystallization device 410, the nanofiltration device 420, the reverse osmosis device 430 and the CDI device 440 have different filtration performances and different operating operability and maintenance costs, You need to choose.

According to the mobile smart water system according to the present invention, different filtration processes can be carried out according to the TDS concentration, so that appropriate salt removal degree for improving the wettability can be maintained. Thus, an increase in the maintenance cost due to excessive filtration (for example, excessive replacement of the RO filter) can be prevented.

Further, the crystallization apparatus 410 and the CDI apparatus 440 can be actively utilized to improve the operability of the operation and reduce the maintenance cost.

In addition, it is possible to keep the filtration performance appropriately and increase the operability of the operation, thereby enabling a compact design. The miniaturization of the smart water system facilitates movement when drilling locations are changed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It should be understood that various modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

100: Oil separator
200: High-speed coagulating sedimentation device
300: Primary storage tank
400: ionic material removal device
410: crystallization device
411: Crystallization supply piping
413: crystallization discharge piping
415: Double filtration piping
420: Nano filtration device
421: NF supply piping
423: NF discharge piping
425: Integrated discharge piping
430: reverse osmosis unit
431: RO supply piping
433: RO exhaust pipe
440: CDI device
441: CDI supply piping
443: CDI discharge piping
451: Supply valve
453: Double filtration valve
457: NF discharge valve
500: Secondary storage tank
600: Smart Water Device
700:
710: TDS sensor
730: Ion sensor

Claims (12)

An oil separator for separating the oil contained in the produced water from the crude oil;
A high-rate coagulative precipitation unit for removing particulate matter contained in the produced water supplied from the oil water separator;
An ion material removal device for removing the salt from the treated water discharged from the high-speed flocculation and sedimentation apparatus; And
A smart water device for manufacturing smart water for enhanced oil recovery by injecting ions for improving wettability into the treated water discharged from the ion material removing device to increase the fluidity of the oil in the rock layer A mobile smart water system containing. The method according to claim 1,
A primary storage tank for storing the treated water discharged from the high-speed coagulation sedimentation apparatus and supplying treatment water to the ion material removal apparatus; And
And a secondary storage tank for storing the treated water discharged from the ion material removing apparatus,
Wherein the ion material removing device comprises:
A crystallization apparatus for precipitating salts contained in the treated water discharged from the primary storage tank;
A nanofiltration device including a nanofiltration membrane (NF) for filtering process water discharged from the primary storage tank;
A reverse osmosis membrane (RO) for filtering the salt contained in the treated water discharged from the primary storage tank by a reverse osmosis method;
A CDI (capacitive deionization) device for removing the salt contained in the treated water discharged from the primary storage tank by a deodorization treatment;
A TDS sensor for measuring TDS (Total Dissolved Solids) of the treated water discharged from the primary storage tank; And
And a controller for controlling a flow path connecting the crystallization device, the nanofiltration device, the reverse osmosis device, and the CDI device according to the measured TDS. 3. The method of claim 2,
Wherein the ion material removing device comprises:
A crystallization supply pipe connecting the primary storage tank and the crystallization device;
An NF supply pipe connecting the primary storage tank and the nanofiltration device; And
And a supply valve that is disposed at a branch point between the crystallization supply pipe and the NF supply pipe to control a flow path. The method of claim 3,
Wherein the ion material removing device comprises:
A crystallization discharge pipe connected to the crystallization device and flowing through the process water discharged from the crystallization device;
A double filtration pipe connecting the crystallization discharge pipe and the nanofiltration device to supply treated water to the nanofiltration device; And
And a double filtration valve disposed at a branch point between the double filtration pipe and the crystallization discharge pipe to control the flow path. 5. The method of claim 4,
Wherein the ion material removing device comprises:
An NF discharge pipe connected to the nanofiltration device, the process water discharged from the nanofiltration device flows;
A CDI supply pipe connected to the NF discharge pipe and the CDI device to supply treated water to the CDI device;
An RO supply pipe connected to the NF discharge pipe and the reverse osmosis unit to supply treated water to the reverse osmosis unit; And
Further comprising an NF discharge valve disposed at a branch point between the NF discharge pipe and the CDI supply pipe and the RO supply pipe to control a flow path. 6. The method of claim 5,
Wherein the ion material removing device comprises:
And an integrated discharge pipe connecting the double filtration valve, the NF discharge valve and the secondary storage tank to supply treated water to the secondary storage tank. The method according to claim 6,
When the measured TDS is equal to or less than a predetermined value A,
A portion of the treated water flows to the crystallization supply pipe, and the remainder of the treated water controls the supply valve to flow to the NF supply pipe,
Wherein the dual filtration valve and the NF discharge valve are controlled so that the treated water discharged from the crystallization apparatus and the treated water discharged from the nanofiltration apparatus are supplied to the secondary storage tank through the integrated discharge pipe. 8. The method of claim 7,
If the measured TDS is more than the predetermined value A and less than the predetermined value B,
Controls the supply valve so that all of the treated water discharged from the primary storage tank flows to the crystallization apparatus,
Controlling the double filtration valve so that all of the process water discharged from the crystallization device flows to the double filtration pipe,
And controls the NF discharge valve such that all of the treated water discharged from the nanofiltration apparatus flows to the CDI apparatus. 9. The method of claim 8,
When the measured TDS exceeds the predetermined value B and is equal to or less than C,
Controls the supply valve so that all of the treated water discharged from the primary storage tank flows to the crystallization apparatus,
The process water discharged from the crystallization device is branched so as to control the double filtration valve so that a part flows to the double filtration pipe and the remainder flows to the integrated discharge pipe,
Wherein the process water discharged from the nanofiltration apparatus controls the NF discharge valve to flow to the CDI apparatus. 10. The method of claim 9,
If the measured TDS exceeds the predetermined value C,
Controls the supply valve so that all of the treated water discharged from the primary storage tank flows to the crystallization apparatus,
Controlling the double filtration valve so that all of the process water discharged from the crystallization device flows to the double filtration pipe,
Wherein the NF filtration device controls the NF discharge valve such that all of the treated water discharged from the nanofiltration device flows to the reverse osmosis device. An oil separator for separating the oil contained in the production water;
A high-rate coagulative precipitation unit for removing particulate matter contained in the produced water supplied from the oil water separator;
A primary storage tank for storing the treated water discharged from the high-speed flocculation and sedimentation apparatus;
An ion material removing device for filtering the treated water discharged from the primary storage tank to remove salts; And
And a smart water device for producing the smart water by injecting ions into the process water discharged from the ion material removing device,
Wherein the ion material removing device comprises:
A crystallization apparatus for precipitating salts contained in the treated water discharged from the primary storage tank; And
And a nanofiltration membrane (NF) for filtering the treated water discharged from the primary storage tank,
Wherein the ion material removing device comprises:
A crystallization supply pipe connecting the primary storage tank and the crystallization device;
An NF supply pipe connecting the primary storage tank and the nanofiltration device; And
And a supply valve that is disposed at a branch point between the crystallization supply pipe and the NF supply pipe to control a flow path. An oil separator for separating the oil contained in the produced water from the crude oil;
A high-rate coagulative precipitation unit for removing particulate matter contained in the produced water supplied from the oil water separator;
An ion material removal device for removing the salt from the treated water discharged from the high-speed flocculation and sedimentation apparatus; And
And a smart water device for producing smart water by injecting ions for improving wettability into the treated water discharged from the ion material removing device,
Wherein the ion material removing device comprises:
Crystallization apparatus for precipitating salts;
A nanofiltration device comprising a nanofiltration membrane (NF); And
And a control unit for controlling the flow channel to supply treatment water to either one of the crystallization apparatus and the nanofiltration apparatus.

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