AU2021106079A4 - Oil and gas field produced water scaling amount measurement and scale type prediction analysis device - Google Patents
Oil and gas field produced water scaling amount measurement and scale type prediction analysis device Download PDFInfo
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- 229910001868 water Inorganic materials 0.000 title claims abstract description 171
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 168
- 238000005259 measurement Methods 0.000 title claims abstract description 57
- 238000004458 analytical method Methods 0.000 title claims abstract description 39
- 238000001179 sorption measurement Methods 0.000 claims abstract description 77
- 238000005303 weighing Methods 0.000 claims abstract description 24
- 238000004140 cleaning Methods 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 238000005189 flocculation Methods 0.000 claims abstract description 10
- 230000016615 flocculation Effects 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 25
- 238000001035 drying Methods 0.000 claims description 15
- 238000005406 washing Methods 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 108091023288 HOTAIR Proteins 0.000 abstract description 2
- 150000002500 ions Chemical class 0.000 description 22
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 20
- 238000012360 testing method Methods 0.000 description 12
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 11
- 229910000019 calcium carbonate Inorganic materials 0.000 description 10
- 235000010216 calcium carbonate Nutrition 0.000 description 10
- 239000010865 sewage Substances 0.000 description 8
- 238000001514 detection method Methods 0.000 description 7
- 230000003068 static effect Effects 0.000 description 7
- 239000000243 solution Substances 0.000 description 6
- 239000000945 filler Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000004255 ion exchange chromatography Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000036470 plasma concentration Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000009614 chemical analysis method Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 238000004626 scanning electron microscopy Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
- G01N33/1853—Hardness of water
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/20—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/96—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation using ion-exchange
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
- G01N33/1813—Specific cations in water, e.g. heavy metals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
- G01N33/182—Specific anions in water
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Abstract
The present disclosure relates to an oil and gas field produced water scaling
amount measurement and scale type prediction analysis device. The device comprises a
scale type prediction analysis device and a scaling amount measurement device;
produced water is connected to the scale type prediction analysis device through a first
pipeline, and is connected to the scaling amount measurement device through a second
pipeline; collected water adsorbed by the scaling amount measurement device is
connected to the scale type prediction analysis device through a third pipeline; wherein
the scale type prediction analysis device comprises an ion chromatograph and a
computer, and the scaling amount measurement device comprises a scale adsorption
device and a weighing device. According to the device, the scaling amount of the
collected water subjected to flocculation filtration treatment can be measured, and the
scale type also can be analyzed.
-1/2
DRAWINGS
Produced water
Cleaning water
Hotair
12
10< 130 110 30
50 --- 120
40
60 140 170 1 160
90 70 80
100
20
FIG. 1
22
21 225 221 223 211
24
29
212 23
FIG. 2
Description
-1/2
Produced water Cleaning water Hotair 12 10< 130 110 30 50 --- 120 40
140 170 1 160 90 70 80
100
FIG. 1 22 21 225 221 223 211
24
29
212 23
FIG. 2
[01] The present disclosure relates to the technical field of petrochemical treatment, and specifically relates to an oil and gas field produced water scaling amount measurement and scale type prediction analysis device.
[02] In the oil and gas well exploitation process, after stratum corrosion ions and irons carried by injection water enter stratum water, the ions in the injection water and the ions in the stratum water are incompatible and react to form precipitates; and meanwhile, when parameters such as water temperature and system pressure are changed, ion balance in stratum water is affected, and some substances exceed the solubility product and are deposited into scale. According to the chemical composition of the scale, oil and gas well scaling types can be divided into carbonate scale and sulfate scale, the carbonate scale is mainly CaCO3, and the sulfate scale is mainly CaSO4 .When the scale is severe, the scale can deposit on a water injection pipeline and a shaft reservoir, blocks the pipeline and the shaft, damages the reservoir, and sometimes also causes under-scale corrosion, so that the production efficiency is seriously reduced, and the production cost is increased. Confirmation of scale types and measurement of scaling amount are very important for taking reasonable control measures.
[03] For scaling amount measurement, static tests and dynamic tests are mainly adopted at present. In the static tests, sewage is put into a sealed bottle, standing is performed at a certain temperature for a certain time, water in the sealed bottle is filtered by using a membrane of 0.45 gm, and the filter membrane is dried and weighed to obtain the scaling amount. In the dynamic tests, sewage passes through a certain device, a certain amount of adsorption materials are contained in the device, after a certain volume of water passes through the adsorption material, the adsorption material is taken out, dried and weighed, and the scaling amount can be obtained.
[04] The measuring process of static and dynamic measurement methods is easily affected by the surface property of the container, and only the macroscopic scaling amount can be obtained.
[05] For scale type distinguishing, a plurality of analysis means such as scanning electron microscopy, energy spectrum analysis and X-ray diffraction are mainly adopted at present to detect scaling products. At the same time, after a scale sample is dissolved through a chemical analysis method, the scale type can be determined by analyzing the content of ions in the scale sample.
[06] The patent with the publication number of CN207689303U discloses a sewage dynamic scaling property evaluation device. The device comprises a sewage storage tank and a filler cylinder, wherein a heating device is arranged below the sewage storage tank; the sewage storage tank comprises a water inlet and a water outlet, the water outlet is sequentially connected with a water pump and a flow control device, the water outlet end of the flow control device is detachably connected with the water inlet end of the filler cylinder, the water inlet is detachably connected with the water outlet end of the filler cylinder, and a scaling adsorption filler is arranged in the filler cylinder. By means of the embodiments, the accuracy of sewage scaling amount evaluation is improved, the accuracy of sewage quality stability evaluation is improved, the structure is simple, and operation is convenient and fast.
[071 The patent with the publication number of CN102652258A discloses a detection device and method for scaling detection, comprising determining the scaling amount of the surface of fluid treatment equipment and/or a functional component inside the equipment. According to the present disclosure, the detection device comprises at least one first sensor with a device for measuring the optical transparency T and/or the electrical conductivity Q of a fluid; the sensor comprises at least one sensitive area located on or near the detected surface.
[08] It is known from the above that in the prior art, scaling amount measurement and scale type predication analysis are performed in two steps, and the device of the above patent can only perform scaling amount measurement and cannot perform scale type predication analysis, so it is important to provide a device capable of performing scaling amount measurement and scale type predication analysis at the same time.
[09] Aiming at the above-mentioned problems, the present disclosure aims to provide an oil and gas field produced water scaling amount measurement and scale type prediction analysis device.
[10] In order to achieve the above-mentioned purpose, the present disclosure provides the following technical scheme:
[11] According to the oil and gas field produced water scaling amount measurement and scale type prediction analysis device, after produced water enters the device, whether the produced water is scaled or not, the scaling amount and the scaling type can be automatically predicted.
[12] Further, the oil and gas field produced water scaling amount measurement and scale type prediction analysis device comprises a scale type prediction analysis device and a scaling amount measurement device, wherein produced water is connected to the scale type prediction analysis device through a first pipeline, and is connected to the scaling amount measurement device through a second pipeline; and collected water adsorbed by the scaling amount measurement device is connected to the scale type prediction analysis device through a third pipeline.
[13] Further, the scale type prediction analysis device comprises an ion chromatograph and a computer, the ion chromatograph is electrically connected with the computer, and scale type prediction software is installed in the computer; the scaling amount measurement device comprises a scale adsorption device and a weighing device; the produced water is connected to the ion chromatograph through the first pipeline and is connected to the scale adsorption device through the second pipeline, and the produced water discharged from the scale adsorption device is connected to the ion chromatograph through the third pipeline.
[141 Further, the collected water used for scale type prediction analysis and scale formation amount measurement is collected water subjected to flocculation filtration treatment.
[15] Further, the scaling amount measurement device also comprises a water container, an inlet and an outlet are formed in the water container, the scale adsorption device and the weighing device are arranged in the water container, and the inlet and the outlet are located on the two sides of the scale adsorption device respectively.
[161 Further, a groove is formed in the inner wall of the water container, the weighing device is located in the groove, and the scale adsorption device is located above the weighing device.
[171 Further, the scale adsorption device comprises a bearing pipe, a supporting framework and a scale adsorption material, the scale adsorption material is arranged in the supporting framework, and the bearing pipe sleeves the outside of the supporting framework; and the outer wall of the bearing pipe is attached to the inner wall of the water container.
[18] Further, a pull rod is arranged on the bearing pipe, one end of the pull rod is fixed on the end face of the bearing pipe, and the other end of the pull rod penetrates through the wall of the water container to be exposed out of the water container.
[19] Further, a sliding groove is formed in the supporting framework, a sliding block is arranged on the bearing pipe, and the sliding block slides along the sliding groove.
[20] Further, the water container is internally provided with a limiting plate, the limiting plate is located on the side, close to the inlet, of the scale adsorption material, one side face of the limiting plate is fixed to an air cylinder rod of an air cylinder, a pressure sensor is arranged on the other side face of the limiting plate, the air cylinder is fixed to the water container, an alarm is arranged outside the water container, and the alarm is electrically connected with the pressure sensor.
[21] Further, a porous baffle is also arranged in the water container, and is arranged on the side, away from the inlet, of the scale adsorption device.
[22] Further, the scaling amount measurement device also comprises a washing device and a drying device; the washing device comprises a water inlet pipe communicating with the water container, and the water inlet pipe is connected with cleaning water; the drying device comprises an air inlet pipe communicating with the water container, and the air inlet pipe is connected with hot air; and the cleaning water and the hot air are discharged through a fourth pipeline communicating with the water container.
[23] Further, a fifth pipeline is arranged at the inlet of the water container, a sixth pipeline is arranged at the outlet of the water container, and the second pipeline, the water inlet pipe and the air inlet pipe all communicate with the fifth pipeline; and the third pipeline and the fourth pipeline both communicate with the sixth pipeline.
[24] Further, a first valve, a second valve, a third valve, a fourth valve, a fifth valve and a sixth valve are respectively arranged on the first pipeline, the second pipeline, the third pipeline, the fourth pipeline, the water inlet pipe and the air inlet pipe, and a flow meter is arranged on the fifth pipeline.
[251 Further, the temperature of hot air in the drying device is 80°C to 95°C; the flow velocity of the hot air is 0.1-0.3 m/s; and the drying time is 25-30 min.
[261 The device hast the beneficial effects that the scaling amount of the collected water subjected to flocculation filtration treatment can be measured, and the scale type also can be analyzed.
[27] Other characteristics and advantages of the present disclosure will be set forth in the subsequent description, and partially obvious from the description, or may be learned through implementation of the present disclosure. The objectives and other advantages of the present disclosure may be realized and attained by the structure pointed out in the description, claims, as well as the attached figures.
[281 To describe the technical solutions in the embodiments of the present disclosure or in the prior art more clearly, the following briefly describes the attached figures required for describing the embodiments or the prior art. Apparently, the attached figures in the following description show some embodiments of the present disclosure, and a person of ordinary skill in the art may still derive other attached figures from these attached figures without creative efforts.
[29] FIG. 1 is a structural schematic diagram of the present disclosure;
[301 FIG. 2 is a structural schematic diagram of a scaling amount measurement device;
[311 FIG. 3 is a structural schematic diagram of a scaling amount measurement device in a preferred embodiment; and
[32] FIG. 4 is a structural schematic diagram of a scale adsorption device.
[331 Reference signs in drawings: 10, scale type prediction analysis device; 11, ion chromatograph; 12, computer; 20, scaling amount measurement device; 21, water container; 211, inlet; 212, outlet; 22, scale adsorption device; 221, bearing pipe; 222, sliding block; 223, supporting framework; 224, sliding groove; 225, scale adsorption material; 23, weighing device; 24, pull rod; 25, limiting plate; 26, air cylinder; 27, pressure sensor; 28, alarm; 29, porous baffle; 30, first pipeline; 40, second pipeline; 50, third pipeline; 60, fourth pipeline; 70, water inlet pipe; 80, air inlet pipe; 90, fifth pipeline; 100, sixth pipeline; 110, first valve; 120, second valve; 130, third valve; 140, fourth valve; 150, fifth valve; 160, sixth valve; and 170, flow meter.
[34] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the following clearly and completely describes the technical solutions in the embodiments of the present disclosure with reference to the attached figures in the embodiments of the present disclosure. Apparently, the described embodiments are some but not all of the embodiments of the present disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.
[35] As shown in FIG. 1, an oil and gasfield produced water scaling amount measurement and scale type prediction analysis device provided by the present disclosure comprises a scale type prediction analysis device 10 and a scaling amount measurement device 20, wherein produced water is connected to the scale type prediction analysis device 10 through a first pipeline 30, and is connected to the scaling amount measurement device 20 through a second pipeline 40; and collected water adsorbed by the scaling amount measurement device 20 is connected to the scale type prediction analysis device 10 through a third pipeline 50. According to the device, the scaling amount of the collected water subjected to flocculation filtration treatment can be measured, and the scale type also can be analyzed.
[36] Specifically, as shown in FIG. 2, the scale type prediction analysis device 10 comprises an ion chromatograph 11 and a computer 12, the ion chromatograph 11 is electrically connected with the computer 12, and scale type prediction software (which is known software in the prior art) is installed in the computer 12; the scaling amount measurement device 20 comprises a scale adsorption device 22 and a weighing device 23; the produced water is connected to the ion chromatograph 11 through the first pipeline 30 and is connected to the scale adsorption device 22 through the second pipeline 40, and the produced water discharged from the scale adsorption device 22 is connected to the ion chromatograph 11 through the third pipeline 50. The collected water used for scale type prediction analysis and scale formation amount measurement is collected water subjected to flocculation filtration treatment.
[371 Through the measurement of plasma concentrations of Ca2+, Mg2+, S42-, 2 C03 , Ba, Sr2, Cl, Na+ and K+ in the collected water before and after adsorption by the scale adsorption device 22 through ion chromatography, the amounts of calcium sulfate scale and calcium carbonate scale are calculated according to the ion concentration difference calculated by the scale type prediction software installed in the computer 12 connected with the ion chromatography; wherein the calcium sulfate scale is calculated as CaSO 4 -2H20; and the calcium carbonate scale is calculated as CaCO 3 The judgment on the types of primary and secondary scaling is given according to the . scaling amounts of calcium sulfate and calcium carbonate. At the same time, weighing is carried out through the weighing device 23, and then the scaling amounts are obtained.
[38] As a preferred embodiment, the scaling amount measurement device 20 also comprises a water container 21, a washing device and a drying device, an inlet 211 and an outlet 212 are formed in the water container 21, the scale adsorption device 22 and the weighing device 23 are arranged in the water container 21, and the inlet 211 and the outlet 212 are located on the two sides of the scale adsorption device 22 respectively. The washing device comprises a water inlet pipe 70 communicating with the water container 21, and the water inlet pipe 70 is connected with cleaning water; the drying device comprises an air inlet pipe 80 communicating with the water container 21, and the air inlet pipe 80 is connected with hot air; and the cleaning water and the hot air are discharged through a fourth pipeline 60 communicating with the water container 21.
[39] After the scale adsorption device 22 is washed by cleaning water (usually deionized water) in the washing device, the scale adsorption device 22 is dried by hot air in the drying device, and the scale adsorption device 22 is weighed by the weighing device 23 after being dried, so that the obtained scaling amount data are more accurate. In practical application, a water pump can be further arranged on the fourth pipeline 60 to control discharge of cleaning water.
[40] In practical application, the flow velocity of produced water entering the scale adsorption device 22 is 0.01-0.5 m/s, and the optimal flow velocity is 0.1-0.3 m/s; and the produced water has a temperature in the range of 30°C to 70°C, optimally 40°C to °C. The washing speed of the cleaning water in the scale adsorption device 22 is 0.01-0.5 m/s, the optimum flow speed is 0.1-0.3 m/s, and the amount is 1/3-1/5, preferably 1/4, of the volume of the produced water entering the scale adsorption device 22. The temperature of hot air in the drying device is 75°C to 105°C, preferably 80°C to °C; the flow velocity of the hot air is 0.1-0.5 m/s, preferably 0.1-0.3 m/s; and the drying time is 20-50 min, preferably 25-30 min. The data are obtained through multiple indoor experiments, stable operation of the device can be guaranteed by selecting the data, and accuracy and timeliness of measurement are considered.
[41] Specifically, a fifth pipeline 90 is arranged at the inlet 211 of the water container 21, a sixth pipeline 100 is arranged at the outlet 212 of the water container, and the second pipeline 40, the water inlet pipe 70 and the air inlet pipe 80 all communicate with the fifth pipeline 90; and the third pipeline 50 and the fourth pipeline both communicate with the sixth pipeline 100. A first valve 110, a second valve 120, a third valve 130, a fourth valve 140, a fifth valve 150 and a sixth valve 160 are respectively arranged on the first pipeline 30, the second pipeline 40, the third pipeline , the fourth pipeline 60, the water inlet pipe 70 and the air inlet pipe 80, and a flow meter 170 is arranged on the fifth pipeline 90. By arranging the first valve 110, the second valve 120, the third valve 130, the fourth valve 140, the fifth valve 150 and the sixth valve 160, opening and closing of each pipeline can be controlled; and by arranging the flow meter 170, the speed of water flow on the fifth pipeline 90 is monitored.
[42] Specifically, the scale adsorption device 22 comprises a bearing pipe 221, a supporting framework 223 (the supporting framework 223 herein does not influence inflow of the collected water and outflow of a scale adsorption material 225) and a scale adsorption material 225, the scale adsorption material 225 is arranged in the supporting framework 223, and the bearing pipe 221 sleeves the outside of the supporting framework 223; the outer wall of the bearing pipe 221 is attached to the inner wall of the water container 21; a pull rod 24 is arranged on the bearing pipe 221, one end of the pull rod 24 is fixed on the end face of the bearing pipe 221, and the other end of the pull rod 24 penetrates through the wall of the water container 21 to be exposed out of the water container 21; a groove is formed in the inner wall of the water container 21, the weighing device 23 is located in the groove, and the scale adsorption device 22 is located above the weighing device 23.
[43] When the scale adsorption device 22 after scale adsorption is weighed, the pull rod 24 is pulled by hands, the bearing pipe 221 is pulled out, the supporting framework 223 and the scale adsorption material 225 fall onto the weighing device 23, then the weighing device 23 is used for weighing the adsorbed supporting framework 223 and scale adsorption material 225, and the obtained weight is subtracted from the weight of the supporting framework 223 and the weight of the scale adsorption material 225 before adsorption, so that the scaling amount can be obtained.
[44] In actual use, the scale adsorption material 225 in the scale adsorption device 22 is preferably selected from a material with an adsorption effect on scale, such as a scale adsorption material 225 (such as cellucotton) with molecules containing groups such as hydroxyl and amino, and the scale adsorption material 225 can form coordination bonds with positive ions such as calcium to induce surface adsorption and aggregation of scale crystals, so that the scale adsorption device 22 has relatively strong adsorption performance on the scale crystals; and measurement errors caused by deposition of scale crystals on the wall surface of the container can be avoided, so that the measurement accuracy of the scaling amount can be improved. The scale adsorption device 22 disclosed by the present disclosure can be used for measuring the scaling amount under the condition of dynamic and continuous sample injection, so that the scaling state in water flowing is well reflected.
[45] Specifically, a porous baffle 29 is also arranged in the water container 21, and is arranged on the side, away from the inlet 211, of the scale adsorption device 22. By arranging the porous baffle 29, the phenomenon of unsmooth water flow caused by displacement of the scale adsorption material 225 due to water flow scouring can be prevented.
[46] As a preferred embodiment, the weighing device 23 can be an electronic scale selectively, the electronic scale is electrically connected with the computer 12, and the weighing result of the electronic scale is fed back to the computer 12.
[471 As a preferred embodiment, a sliding groove 224 is formed in the supporting framework 223 selectively, a sliding block 22 is arranged on the bearing pipe 221, and the sliding block 222 slides along the sliding groove 224, as shown in FIG. 4. By arranging the sliding groove 224 and the sliding block 222, the bearing pipe 221 is more convenient to draw out. Of course, it is also possible to arrange the sliding block 222 on the supporting framework 223, and to arrange the sliding groove 224 or other sliding structures on the bearing pipe 221 that enables rapid withdrawal of the bearing pipe 221 from the support framework 223.
[48] As a preferred embodiment, the scaling amount measurement device 20 can be arranged to be a structure as shown in FIG. 3; and the following structures are added on the basis of the scaling amount measurement device 20 in FIG. 2: the water container 21 is internally provided with a limiting plate 25, the limiting plate 25 is located on the side, close to the inlet 211, of the scale adsorption material 225, one side face of the limiting plate 25 is fixed to an air cylinder rod of an air cylinder 26, a pressure sensor 27 is arranged on the other side face of the limiting plate 25, the air cylinder 26 is fixed to the water container 21, an alarm 28 is arranged outside the water container 21, and the alarm 28 is electrically connected with the pressure sensor 27. The limiting plate 25 is arranged to prevent the supporting framework 223 and the scale adsorption material 225 from moving when the supporting pipe 221 is drawn out when the supporting pipe 221 is pulled by the pull rod 24. Specifically, before the bearing pipe 221 is pulled by the pull rod 24, the air cylinder 26 is started, so that the limiting plate 25 moves, when the pressure sensor 27 on the limiting plate 25 senses pressure, the alarm 28 gives an alarm, and the air cylinder 26 stops moving.
[49] The workflow for specific use of the device of the present disclosure is given in conjunction with FIG. 1 and FIG. 2 as follows:
[50] opening first valve 110, closing the other valves, enabling the collected water to enter the ion chromatograph 11, and measuring the plasma concentrations of Ca, Mg2+, 42-, C0 3 2 , Ba2, Sr2, Cl, Na* and K+;
[51] closing the first valve 110, opening the second valve 120, the third valve 130 and the fourth valve 140, so that the collected water enters the scale adsorption device 22, adsorbing calcium sulfate and calcium carbonate scales on the surface of the scale adsorption device 22, enabling a part of the collected water subjected to adsorption treatment to enter the ion chromatograph 11, measuring the plasma concentrations of Ca2+, Mg2+, SO42-, C03 2-, Ba2+, Sr2+ Cl-, Na* and K+, calculating the ion concentration difference through software installed in the computer 12, calculating the amounts of calcium sulfate and calcium carbonate; discharging the other part of collected water subjected to adsorption treatment through the fourth pipeline 60;
[52] closing the second valve 120 and the third valve 130, and opening the fifth valve 150, so that the scale adsorption device 22 is washed with the cleaning water, and the washed cleaning water is discharged through the fourth pipeline 60;
[531 closing the fifth valve 150, opening the sixth valve 160, drying the scale adsorption device 22 through hot air, and after drying is finished, the closing the sixth valve 160;
[54] pulling the pull rod 24, pulling out the bearing pipe 221 of the scale adsorption device 22, then weighing the dried supporting framework 223 and scale adsorption material 225 by using the weighing device 23, subtracting the obtained weight from the weight of the supporting framework 223 and the weight of the scale adsorption material 225 before adsorption, and thus obtaining the scaling amount.
[55] Several embodiments are given below, and the results of the scaling amount measurement and scale type prediction analysis performed by using the device of the present disclosure are as follows:
[56] Embodiment I
[571 Produced water in the ninth prolonged layer and produced water in the second long layer of a certain oil production plant in the northern Shaanxi oil field (the volume ratio of the produced water is 3: 7) are mixed, and the mixed produced water enter the device disclosed by the present disclosure after being subjected to flocculation and filtration treatment. When the water inlet amount is 50 L, the obtained scaling amount is 126140 mg. According to the ion chromatography measurement result, after passing through the scaling device, SO42- is reduced from 1542.5 mg/L to 429.6 mg/L, C0 3 2 ions are reduced from 543.8 mg/L to 227.4 mg/L, the amount (Wi) of CaSO 42-H20 and the amount (W 2 ) of CaCO 3 are calculated to be 99760 mg and 26350 mg respectively, and the sum of the two amounts is 126110 mg which is basically consistent with the determined scaling amount value, so that the measurement result is accurate.
[58] Contrast test 1: a static test is adopted, the scaling amount of the same water sample is measured to be 2421.7 mg/L, and through XRD detection, CaSO 42-H 20 and CaCO3 are contained in the scale sample, the proportion of CaSO 42-H 2 0 is 78.7%, which is basically consistent with the result of the present disclosure.
[59] Through the above contents, it is observed that:
[601 firstly, the device can dynamically and automatically measure scaling on line, and when the device and the method are adopted for measurement, the measured scaling amount is accurate, and scale type judgment is accurate; and
[611 secondly, the ion chromatography is adopted to realize instant scaling ion measurement as well as scaling amount and configuration prediction, and XRD is a later scale sample analysis result.
[62] Embodiment II
[631 Produced water in the second long layer of a certain northern Shaanxi is subjected to flocculation and filtration treatment and then enters the device disclosed by the present disclosure. The water inlet amount is 100 L, the obtained scaling amount is 72340 mg, S0 4 2 - is reduced from 429.6 mg/L to 85.4 mg/L, C03 2 - ions are reduced from 334.1 mg/L to 227.8 mg/L, and the calculated amount (Wi) of CaSO 42-H20 and the calculated amount (W 2 ) of CaCO3 are 61670 mg and 10630 mg respectively and are basically consistent with the measured values of the total scaling amount, so that the measured results are accurate.
[64] Contrast test 2: a static test is adopted, the scaling amount of the same water sample is measured to be 723.6 mg/L, and through XRD detection, CaSO 42-H20 is mainly contained in the scale sample, the proportion of CaSO 42-H20 is 84.7%, which is basically consistent with the result of the present disclosure.
[651 Embodiment III
[661 Produced water in the ninth prolonged layer and produced water in the tenth prolonged layer of a certain northern Shaanxi oil field according to the volume ratio of 8:2 are mixed, and the mixed produced water enter the device disclosed by the present disclosure after being subjected to flocculation and filtration treatment. The water inlet amount is 50 L, the obtained scaling amount is 101305mg, S0 4 2 - is reduced from 4799.7 mg/L to 3841.1 mg/L, C0 3 2 - ions are reduced from 1200.2 mg/L to 1015.3 mg/L, and the calculated amount (Wi) of CaSO 42-H 20 and the calculated amount (W 2 ) of CaCO 3 are 85875 mg and 15400 mg respectively and are basically consistent with the measured values of the scaling amount of 566 mg, and the sum of the two calculated amounts is 6405 mg, so that the measured results are accurate.
[671 Contrast test 3: a static test is adopted, the scaling amount of the same water sample is measured to be 2028 mg/L, and through XRD detection, CaSO 42-H 20 is mainly contained in the scale sample, the proportion of CaSO 42-H 20 is 83.9%, which is basically consistent with the result of the present disclosure.
[681 Embodiment IV
[691 Produced water in the sixth long layer and produced water in the fourth and fifth long layers of a certain northern Shaanxi oil field (the volume ratio of the produced water is 4: 6) are mixed, and the mixed produced water enter the device disclosed by the present disclosure after being subjected to flocculation and filtration treatment. The water inlet amount is 50 L, the obtained scaling amount is 9680 mg, the ion concentrations of S0 4 2- and C03 2- are reduced, and the calculated total structural amount of S0 4 2 - and C0 3 2 - is 9684 mg and is basically consistent with the actually measured scaling amount value, so that the measurement result is accurate.
[701 Contrast test 4: a static test is adopted, through XRD detection of an obtained scale sample, CaCO3 is mainly contained in the scale sample, the proportion of CaCO3 is 63.7%, which is basically consistent with the result of the present disclosure.
[711 The foregoing embodiments are merely intended for describing the technical solutions of this application, but not for limiting this application. Although this application is described in detail with reference to the foregoing embodiments, persons of ordinary skill in the art should understand that they may still make modifications to the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features thereof, without departing from the scope of the technical solutions of the embodiments of this application.
Claims (5)
1. An oil and gas field produced water scaling amount measurement and scale type prediction analysis device, comprising a scale type prediction analysis device and a scaling amount measurement device, wherein produced water is connected to the scale type prediction analysis device through a first pipeline, and is connected to the scaling amount measurement device through a second pipeline; collected water adsorbed by the scaling amount measurement device is connected to the scale type prediction analysis device through a third pipeline; after the produced water enters the device, whether the produced water is scaled or not, the scaling amount and the scaling type can be automatically predicted; the scale type prediction analysis device comprises an ion chromatograph and a computer, the ion chromatograph is electrically connected with the computer, and scale type prediction software is installed in the computer; the scaling amount measurement device comprises a scale adsorption device and a weighing device; the produced water is connected to the ion chromatograph through the first pipeline and is connected to the scale adsorption device through the second pipeline, and the produced water discharged from the scale adsorption device is connected to the ion chromatograph through the third pipeline; and the collected water used for scale type prediction analysis and scale formation amount measurement is collected water subjected to flocculation filtration treatment.
2. The oil and gas field produced water scaling amount measurement and scale type prediction analysis device according to claim 1, wherein the scaling amount measurement device also comprises a water container, an inlet and an outlet are formed in the water container, the scale adsorption device and the weighing device are arranged in the water container, and the inlet and the outlet are located on the two sides of the scale adsorption device respectively; a groove is formed in the inner wall of the water container, the weighing device is located in the groove, and the scale adsorption device is located above the weighing device; a porous baffle is also arranged in the water container, and is arranged on the side, away from the inlet, of the scale adsorption device; the scale adsorption device comprises a bearing pipe, a supporting framework and a scale adsorption material, the scale adsorption material is arranged in the supporting framework, and the bearing pipe sleeves the outside of the supporting framework; and the outer wall of the bearing pipe is attached to the inner wall of the water container.
3. The oil and gas field produced water scaling amount measurement and scale type prediction analysis device according to claim 2, wherein a pull rod is arranged on the bearing pipe, one end of the pull rod is fixed on the end face of the bearing pipe, and the other end of the pull rod penetrates through the wall of the water container to be exposed out of the water container; a sliding groove is formed in the supporting framework, a sliding block is arranged on the bearing pipe, and the sliding block slides along the sliding groove; and the water container is internally provided with a limiting plate, the limiting plate is located on the side, close to the inlet, of the scale adsorption material, one side face of the limiting plate is fixed to an air cylinder rod of an air cylinder, a pressure sensor is arranged on the other side face of the limiting plate, the air cylinder is fixed to the water container, an alarm is arranged outside the water container, and the alarm is electrically connected with the pressure sensor.
4. The oil and gas field produced water scaling amount measurement and scale type prediction analysis device according to claim 1, wherein the scaling amount measurement device also comprises a washing device and a drying device; the washing device comprises a water inlet pipe communicating with the water container, and the water inlet pipe is connected with cleaning water; the drying device comprises an air inlet pipe communicating with the water container, and the air inlet pipe is connected with hot air; the cleaning water and the hot air are discharged through a fourth pipeline communicating with the water container; a fifth pipeline is arranged at the inlet of the water container, a sixth pipeline is arranged at the outlet of the water container, and the second pipeline, the water inlet pipe and the air inlet pipe all communicate with the fifth pipeline; and the third pipeline and the fourth pipeline both communicate with the sixth pipeline.
5. The oil and gas field produced water scaling amount measurement and scale type prediction analysis device according to claim 4, wherein a first valve, a second valve, a third valve, a fourth valve, a fifth valve and a sixth valve are respectively arranged on the first pipeline, the second pipeline, the third pipeline, the fourth pipeline, the water inlet pipe and the air inlet pipe, and a flow meter is arranged on the fifth pipeline; the temperature of hot air in the drying device is 80°C to 95°C; the flow velocity of the hot air is 0.1-0.3 m/s; and the drying time is 25-30 min.
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