CN109307737B - Evaluation device and evaluation method for solid wax inhibitor - Google Patents
Evaluation device and evaluation method for solid wax inhibitor Download PDFInfo
- Publication number
- CN109307737B CN109307737B CN201710637132.9A CN201710637132A CN109307737B CN 109307737 B CN109307737 B CN 109307737B CN 201710637132 A CN201710637132 A CN 201710637132A CN 109307737 B CN109307737 B CN 109307737B
- Authority
- CN
- China
- Prior art keywords
- unit
- condensate
- solid wax
- proofing agent
- core holder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000007787 solid Substances 0.000 title claims abstract description 170
- 239000003112 inhibitor Substances 0.000 title claims abstract description 72
- 238000011156 evaluation Methods 0.000 title claims abstract description 38
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 114
- 238000011084 recovery Methods 0.000 claims abstract description 64
- 238000010438 heat treatment Methods 0.000 claims abstract description 42
- 238000012360 testing method Methods 0.000 claims abstract description 38
- 239000001993 wax Substances 0.000 claims description 45
- 238000000034 method Methods 0.000 claims description 24
- 239000012188 paraffin wax Substances 0.000 claims description 21
- 238000002347 injection Methods 0.000 claims description 14
- 239000007924 injection Substances 0.000 claims description 14
- 230000000704 physical effect Effects 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 13
- 238000007710 freezing Methods 0.000 claims description 13
- 230000008014 freezing Effects 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 7
- 239000003921 oil Substances 0.000 description 49
- 238000004090 dissolution Methods 0.000 description 14
- 230000009467 reduction Effects 0.000 description 8
- 239000007788 liquid Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000000740 bleeding effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
Abstract
The invention provides an evaluation device and an evaluation method of a solid wax inhibitor, wherein the evaluation device comprises: a condensate drive unit, a first test section and a second test section; the first testing part comprises a first solid wax-proofing agent containing unit, a first condensate oil recovering unit and a first heating unit, and the first solid wax-proofing agent containing unit is respectively communicated with the first condensate oil recovering unit and the first heating unit; the condensate oil driving unit is communicated with the first solid wax-proofing agent containing unit through a first driving pipeline; the second testing part comprises a second solid wax-proofing agent containing unit, a second condensate oil recovery unit, a second heating unit and a pressure supply unit, wherein the second solid wax-proofing agent containing unit is respectively communicated with the second condensate oil recovery unit, the second heating unit and the pressure supply unit; the condensate driving unit is communicated with the second solid wax-proofing agent containing unit through a second driving pipeline. The invention can realize the accurate evaluation of the solid wax inhibitor.
Description
Technical Field
The invention relates to a performance evaluation technology of chemical agents in petroleum exploitation, in particular to an evaluation device and an evaluation method of a solid wax inhibitor, and belongs to the technical field of petroleum exploitation.
Background
The problem of paraffin deposition in crude oil has been a serious problem faced by the petroleum industry, and paraffin deposition occurs in surface pipelines and submarine pipelines. In recent years, as the formation pressure of each oil field decreases and the production system changes, paraffin deposition problems are increasing. At present, the research on chemical liquid wax-proofing agents is mature, and each large oil field has independently developed liquid wax-proofing agents, but the filling of some high-pressure packer wells has problems, and (1) the existence of the packer enables the liquid wax-proofing agents not to be added from the oil sleeve annulus; (2) The drip adding method has higher performance requirements on the air tightness and the like of the device; (3) the risk of high tripping frequency of the tubular column exists by using a dosing valve.
In recent years, research on solid wax-proofing agents has been favored because of the above problems with conventional liquid wax-proofing agents, but there are certain problems with the evaluation of solid wax-proofing agents, (1) the measurement of the effective concentration of solid wax-proofing agents is not possible; (2) The dissolution rate of the solid wax inhibitor cannot be measured, and (3) the performance of the solid wax inhibitor cannot be evaluated under high-temperature and high-pressure conditions, etc., which restrict the development of the solid wax inhibitor technology.
Disclosure of Invention
The invention provides an evaluation device and an evaluation method of a solid wax inhibitor, which are used for overcoming the defect that the solid wax inhibitor cannot be comprehensively evaluated in the prior art.
The invention provides an evaluation device of a solid wax inhibitor, comprising: a condensate drive unit, a first test section and a second test section;
the first testing part comprises a first solid wax-proofing agent containing unit, a first condensate oil recovery unit and a first heating unit, and the first solid wax-proofing agent containing unit is respectively communicated with the first condensate oil recovery unit and the first heating unit; the condensate oil driving unit is communicated with the first solid paraffin inhibitor containing unit through a first driving pipeline and is used for injecting condensate oil into the first solid paraffin inhibitor containing unit, and a first valve is arranged on the first driving pipeline;
the second testing part comprises a second solid wax-proofing agent containing unit, a second condensate oil recovery unit, a second heating unit and a pressure supply unit, wherein the second solid wax-proofing agent containing unit is respectively communicated with the second condensate oil recovery unit, the second heating unit and the pressure supply unit; the condensate driving unit is communicated with the second solid wax-proofing agent containing unit through a second driving pipeline and is used for injecting condensate into the second solid wax-proofing agent containing unit, and a second valve is arranged on the second driving pipeline.
In a specific embodiment, the second solid wax inhibitor holding unit comprises a first core holder and a second core holder;
the condensate driving unit is respectively communicated with the first core holder and the second core holder and is used for respectively injecting condensate into the first core holder and the second core holder, a first injection valve is arranged between the condensate driving unit and the first core holder, and a second injection valve is arranged between the condensate driving unit and the second core holder;
a first discharge valve is arranged between the second condensate recovery unit and the first core holder, and a second discharge valve is arranged between the second condensate recovery unit and the second core holder.
In a specific embodiment, the pressure supply unit comprises a confining pressure supply unit and a back pressure supply unit, wherein the confining pressure supply unit respectively provides confining pressure for the first core holder and the second core holder, and the back pressure supply unit respectively provides back pressure for the first core holder and the second core holder;
a first confining pressure valve is arranged between the confining pressure supply unit and the first core holder, and a second confining pressure valve is arranged between the confining pressure supply unit and the second core holder.
In a specific embodiment, the second condensate recovery unit is communicated with the first core holder and the second core holder respectively through a back pressure valve, and the second condensate recovery unit is used for receiving condensate discharged by the first core holder and the second core holder;
the back pressure valve is also in communication with the back pressure supply unit.
In a specific embodiment, the first condensate recovery unit includes a bottom recovery tank and a top recovery tank, the bottom recovery tank is in communication with the bottom of the first solid wax inhibitor holding unit through a bottom drain valve, and the top recovery tank is in communication with the top of the first solid wax inhibitor holding unit through a top drain valve.
In one embodiment, the device further comprises a communicating pipe and a flowmeter;
the communicating pipe is communicated with the first solid wax-proofing agent containing unit; the flowmeter is arranged between the back pressure valve and the second condensate recovery unit.
In a specific embodiment, the second test part further comprises a first pressure gauge, a second pressure gauge, a third pressure gauge, a fourth pressure gauge and a fifth pressure gauge;
the first pressure gauge is arranged between the second valve and the second solid wax-proofing agent containing unit, and the second pressure gauge is arranged between the first confining pressure valve and the first core holder; the third pressure gauge is arranged between the confining pressure supply unit and the second confining pressure valve; the fourth pressure gauge is arranged between the back pressure supply unit and the back pressure valve; the fifth pressure gauge is in communication with the first and second discharge valves, respectively.
The invention also provides a method for evaluating the solid wax inhibitor, which is performed by using any one of the evaluation devices.
In a specific embodiment, the condensate is injected into the first solid wax-proofing agent containing unit by using the condensate driving unit, wherein the first solid wax-proofing agent containing unit contains the solid wax-proofing agent and the propping agent; heating the first solid wax-proofing agent containing unit to a first preset temperature through the first heating unit, and measuring a first physical property parameter of the condensate oil after a first preset time;
in a specific embodiment, the condensate is injected into the second solid wax-proofing agent containing unit by using the condensate driving unit, wherein the second solid wax-proofing agent containing unit contains the solid wax-proofing agent and the propping agent; heating the second solid wax-proofing agent containing unit to a second preset temperature and preset pressure through the second heating unit and the pressure supply unit respectively, and measuring a second physical property parameter of the condensate oil after a second preset time; and establishing a change relation curve of the second physical parameter and the pressure/temperature.
The evaluation device and the evaluation method of the solid wax-proofing agent can quantitatively measure the performance parameters of the solid wax-proofing agent in a laboratory and realize accurate evaluation of the solid wax-proofing agent for various oil fields.
Drawings
FIG. 1 is a schematic diagram of an embodiment of an apparatus for evaluating a solid wax inhibitor according to the present invention;
FIG. 2 is a schematic structural view of another embodiment of the evaluation device for a solid wax-proofing agent of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Fig. 1 is a schematic structural diagram of an embodiment of an apparatus for evaluating a solid wax inhibitor according to the present invention, please refer to fig. 1, wherein the apparatus for evaluating a solid wax inhibitor includes: a condensate drive unit 0, a first test section and a second test section; the first testing part comprises a first solid wax-proofing agent containing unit 10, a first condensate oil recovering unit 11 and a first heating unit 12, wherein the first solid wax-proofing agent containing unit 10 is respectively communicated with the first condensate oil recovering unit 11 and the first heating unit 12; the condensate oil driving unit 0 is communicated with the first solid wax-proofing agent containing unit 10 through a first driving pipeline for injecting condensate oil into the first solid wax-proofing agent containing unit 10, and the first driving pipeline is provided with a first valve 011; the second testing part comprises a second solid wax-proofing agent containing unit 20, a second condensate oil recovery unit 21, a second heating unit 22 and a pressure supply unit 23, wherein the second solid wax-proofing agent containing unit 20 is respectively communicated with the second condensate oil recovery unit 21, the second heating unit 22 and the pressure supply unit 23, and the condensate oil driving unit 0 is communicated with the second solid wax-proofing agent containing unit 20 through a second driving pipeline for injecting condensate oil into the second solid wax-proofing agent containing unit 20, and a second valve 021 is arranged on the second driving pipeline.
Specifically, the evaluation device of the invention comprises two parts, namely a first test part and a second test part, wherein the first test part is used for normal pressure test of the solid wax inhibitor, the second test part is used for high pressure test of the solid wax inhibitor, and the condensate oil driving unit 0 is controlled by the opening and closing states of the first valve 011 and the second valve 021 to respectively supply condensate oil to the two parts so as to supply working mediums of the solid wax inhibitor.
In the first test portion, the first solid wax-proofing agent containing unit 10 is used for containing solid wax-proofing agent and other materials, when the condensate oil is injected into the first solid wax-proofing agent containing unit 10 by the condensate oil driving unit 0, the first heating unit 12 heats the first solid wax-proofing agent containing unit 10 to a preset temperature, when the solid wax-proofing agent in the first solid wax-proofing agent containing unit 10 reaches the preset temperature and is preserved for a preset time, the condensate oil in the first solid wax-proofing agent containing unit 10 can be discharged to the first condensate oil recovery unit 11, and the condensate oil in the first condensate oil recovery unit 11 is subjected to related parameter measurement, so that the wax-proofing effect of the solid wax-proofing agent under the preset temperature and the preset time can be obtained through the change value of the related parameters of the condensate oil before and after the reaction with the solid wax-proofing agent. The first heating unit 12 may be a resistive heating device, and the first heating unit 12 may be disposed inside the first solid wax-inhibitor containing unit 10 or may be disposed outside the first solid wax-inhibitor containing unit 10, which is not limited by the specific connection relationship between the first heating unit 12 and the first solid wax-inhibitor containing unit 10. It is conceivable that there should be a controllable valve between the first condensate recovery unit 11 and the first solid wax-inhibitor holding unit 10 to control condensate drainage.
In the second test part, the working principle and the connection relationship are substantially similar to those of the first test part, except that the second test part is required to press the solid wax-proofing agent in the second solid wax-proofing agent containing unit 20 to a preset pressure by the pressure supply unit 23, so as to obtain the wax-proofing effect of the solid wax-proofing agent at a preset temperature, a preset pressure and a preset time.
In the specific evaluation test, the preset time and the preset temperature in the first test section may be the same as or different from those in the second test section.
Example two
Fig. 2 is a schematic structural diagram of another embodiment of the apparatus for evaluating a solid wax inhibitor according to the present invention, please refer to fig. 2, and based on the implementation of the first embodiment, the second solid wax inhibitor containing unit 20 includes a first core holder 201 and a second core holder 202; the condensate driving unit 0 is respectively communicated with the first core holder 201 and the second core holder 202 and is used for respectively injecting condensate into the first core holder 201 and the second core holder 202, a first injection valve 201a is arranged between the condensate driving unit 0 and the first core holder 201, and a second injection valve 202a is arranged between the condensate driving unit 0 and the second core holder 202; a first drain valve 201b is disposed between the second condensate recovery unit 21 and the first core holder 201, and a second drain valve 202b is disposed between the second condensate recovery unit 21 and the second core holder 202.
Because the second testing portion needs to be tested under the high pressure condition, the second solid wax-proofing agent containing unit 20 may be a core holder, where, in order to prevent the core holder from malfunctioning during the experiment, two core holders may be used in parallel, and the first injection valve 201a and the second injection valve 202a are respectively added at the inlets of the two core holders, so as to control the condensate driving unit 0 to inject condensate into the two core holders respectively, so that the two core holders work independently without affecting each other. It is conceivable that by providing a first drain valve 201b at the outlet of the first core holder 201 and a second drain valve 202b at the outlet of the second core holder 202, the draining operations of the two core holders are controlled independently of each other.
Further, the pressure supply unit 23 includes a confining pressure supply unit 231 and a back pressure supply unit 232, the confining pressure supply unit 231 providing confining pressure to the first core holder 201 and the second core holder 202, respectively, and the back pressure supply unit 232 providing back pressure to the first core holder 201 and the second core holder 202, respectively; a first confining pressure valve 201c is arranged between the confining pressure supply unit 231 and the first core holder 201, and a second confining pressure valve 202c is arranged between the confining pressure supply unit 231 and the second core holder 202.
The above arrangement may specifically complete the respective confining pressure supply by arranging confining pressure pipes between the confining pressure supply unit 231 and the first core holder 201 and the second core holder 202, respectively, and it is conceivable that the first confining pressure valve 201c and the second confining pressure valve 202c are provided on the confining pressure pipes connected respectively. Likewise, the respective back pressure supplies are accomplished by providing back pressure conduits between the back pressure supply unit 232 and the first and second core holders 201, 202, respectively. Of course, in consideration of safety operation, a total confining pressure valve 231a and a total back pressure valve 232a may be provided for controlling the open and closed states of the confining pressure supply unit 231 and the back pressure supply unit 232, respectively. Specifically, both the confining pressure supply unit 231 and the back pressure supply unit 232 may be displacement pumps.
Accordingly, the evaluation device of the present invention can accomplish pressure control of the first core holder 201 and the second core holder 202, respectively, by the open/close states of the confining pressure total valve 231a, the back pressure total valve 232a, the first confining pressure valve 201c, and the second confining pressure valve 202c.
Further, the second condensate recovery unit 21 is communicated with the first core holder 201 and the second core holder 202 through a back pressure valve 24, and the second condensate recovery unit 21 is used for receiving condensate discharged by the first core holder 201 and the second core holder 202; the back pressure valve 24 is also in communication 232 with a back pressure supply unit. Specifically, the second condensate recovery unit 21 is connected to the outlets of the first core holder 201 and the second core holder 202 through a back pressure valve 24, and when condensate in a certain core holder needs to be discharged, a discharge valve of the corresponding core holder is opened, and then the pressure is regulated through the back pressure valve 24, so that the condensate in the corresponding core holder is discharged into the second condensate recovery unit 21, thereby facilitating sampling and detection of the condensate. To facilitate metering the volume of condensate discharged in the core holder, a flow meter 25 may be provided between the back pressure valve 24 and the second condensate recovery unit 21. In order to further ensure the safety of the operation, a total discharge valve 26 may be provided between the back pressure valve 24 and the discharge valve of the core holder, and a recovery valve 21a may be provided between the flow meter 25 and the second condensate recovery unit 21.
It will be appreciated that the control and coordination between the units described above may be performed by connecting pipes between the units and valves on the corresponding pipes.
Further, in the first test part, the first condensate recovery unit 11 may include a bottom recovery tank 110 and a top recovery tank 111, the bottom recovery tank 110 being in communication with the bottom of the first solid wax-inhibitor containing unit 10 through a bottom drain valve 110a, and the top recovery tank 111 being in communication with the top of the first solid wax-inhibitor containing unit 10 through a top drain valve 111 a. In the experiment, the condensate driving unit 0 drives the condensate into the first solid wax-inhibitor containing unit 10 until the condensate is filled in the first solid wax-inhibitor containing unit 10, then when the first heating unit 12 heats the first solid wax-inhibitor containing unit 10, the condensate in the first solid wax-inhibitor containing unit 10 expands in volume, at this time, the top discharge valve 111a can be opened to discharge the excess condensate into the top recovery tank 111, and the bottom recovery tank 110 is used for receiving the condensate reacted with the solid wax-inhibitor. It should be noted that, in order to determine the condensate volume in the first solid wax-inhibitor containing unit 10, a communicating pipe 13 may be provided in communication with the first solid wax-inhibitor containing unit 10, so as to facilitate observation of the liquid level in the first solid wax-inhibitor containing unit 10.
In addition, an injection valve 10a may be further disposed on the first driving pipe, specifically disposed between the first valve 011 and the condensate inlet of the first solid wax-inhibitor containing unit 10, for further controlling the driving of the condensate of the first solid wax-inhibitor containing unit 10 by the condensate driving unit 0. In this embodiment, the condensate driving unit 0 and the bottom recovery tank 110 are connected to the condensate inlet of the first solid wax-inhibitor containing unit 10, and the injection and discharge of the condensate of the first solid wax-inhibitor containing unit 10 are controlled by controlling different valves.
Further, the second test section further includes a first pressure gauge 27a, a second pressure gauge 27b, a third pressure gauge 27c, a fourth pressure gauge 27d, and a fifth pressure gauge 27e; the first pressure gauge 27a is arranged between the second valve 021 and the second solid wax inhibitor containing unit 20, and the second pressure gauge 27b is arranged between the first confining pressure valve 201c and the first core holder 201; a third pressure gauge 27c is provided between the confining pressure supply unit 231 and the second confining pressure valve 202 c; the fourth pressure gauge 27d is provided between the back pressure supply unit 232 and the back pressure valve 24; the fifth pressure gauge 27e communicates with the first and second discharge valves 201b and 202b, respectively.
Example III
This embodiment is a method for evaluating a solid wax-proofing agent using the evaluation apparatus of the second embodiment, the method comprising:
1) Injecting condensate into the first solid wax-proofing agent containing unit 10 by utilizing the condensate driving unit 0, wherein the first solid wax-proofing agent containing unit 10 is filled with solid wax-proofing agent and propping agent;
2) Heating the first solid wax-inhibitor containing unit 10 to a first preset temperature by a first heating unit 12, and measuring a first physical property parameter of condensate oil after a first preset time;
3) And establishing a change relation curve of the first physical property parameter and time/temperature.
The above method is a method for evaluating a solid wax inhibitor under normal pressure using the first test section.
The specific operation of the step 1) is as follows: the second valve 021 is closed, the first valve 011 is opened, the injection valve 10a is opened, the condensate driving unit 0 is opened to enable condensate to be injected into the first solid paraffin inhibitor containing unit 10 until the liquid level in the communicating pipe 13 is at the highest position (namely, the first solid paraffin inhibitor containing unit 10 is filled), the first valve 011 is closed, and the injection valve 10a is opened. Wherein, the first solid wax-proofing agent containing unit 10 contains a mixture of solid wax-proofing agent and propping agent, and the solid wax-proofing agent accounts for 2% of the propping agent by mass.
The wax content of the condensate also needs to be measured before step 1).
The specific operation of the step 2) is as follows: the first heating unit 12 is turned on to heat the first solid wax-inhibitor holding unit 10 to a first preset temperature (greater than the wax bleeding point of the condensate), and the heated and expanded gas is introduced into the top recovery tank 111 during the heating process so that the top discharge valve 111a can be properly opened. After the first preset temperature is maintained for a first preset time, the injection valve 10a and the bottom discharge valve 110a are opened, and the condensate in the first solid wax-preventing agent containing unit 10 is discharged to the bottom recovery tank 110.
The condensate in the bottom recovery tank 110 is sampled and a first physical property parameter of the oil sample is measured, which may include values of wax control rate, freezing point depression, etc. of the oil sample. The specific measurement method can refer to the standard Q/SY 158-2013 technical Specification for oil recovery and wax control and SY/T6300-2009 technical Condition for oil recovery and wax control.
After the measurement is completed, the condensate oil in the bottom recovery tank 110 is emptied, and steps 1) to 2) are repeated N times until the measured paraffin control rate and the measured freezing point reduction value change, wherein the first preset times of N times are different, the first preset temperatures of N times are the same, or the first preset times of N times are the same, and the first preset temperatures of N times are different (the first preset temperatures of N times are all greater than the paraffin release point of the condensate oil).
Thus, wax control rate-time/temperature data of N groups of oil samples, and freezing point depression value-time/temperature data of N groups of oil samples were obtained
In step 3), a corresponding relation curve is made according to the data, and the method comprises the following steps: the wax-preventing rate-time curve, the wax-preventing rate-temperature curve, the freezing point reduction value-time curve and the freezing point reduction value-temperature curve can obtain the wax-preventing effect of the solid wax-preventing agent at a certain temperature or within a certain service time, thereby providing a referent data base for future application in oil fields.
Example IV
This embodiment is a method for evaluating a solid wax-proofing agent using the evaluation apparatus of the second embodiment, the method comprising:
1) Injecting condensate into the first solid paraffin inhibitor containing unit 10 by using the condensate driving unit 0, wherein the first solid paraffin inhibitor containing unit 10 is filled with solid paraffin inhibitor and propping agent, and recording the volume of the condensate driven in;
2) Heating the first solid wax-preventing agent containing unit 10 to a first preset temperature by the first heating unit 12, and discharging condensate in the first solid wax-preventing agent containing unit 10 after a first preset time;
3) Repeating the steps 1) -2) for N times, wherein the first preset time of the N times is different, and N is a positive integer greater than or equal to 1;
4) And obtaining the dissolution rate of the solid wax-proofing agent in unit time at the first preset temperature through the difference value of the condensate volumes driven in for N times.
The above method is a method for evaluating a solid wax inhibitor under normal pressure using the first test section.
Step 1) is the same as step 1) of example three, except that the volume of condensate displaced needs to be recorded each time.
Step 2) is identical to the operation of step 2) in example three, except that the physical property parameters of the relevant condensate are not required to be tested.
In step 3), the above steps 1) -2) are repeated a total of N times.
In step 4), the first solid wax-inhibitor containing unit 10 is gradually dissolved under the condition of repeatedly injecting the condensate and heating, that is, the volume of the condensate contained in the first solid wax-inhibitor containing unit 10 is smaller and smaller each time the condensate is driven in, that is, the volume of the driven condensate is reduced compared with the previous time, and the difference between the volumes of the two condensate is the dissolved solid wax-inhibitor. Thus, the dissolution rate of the solid wax-proofing agent per unit time at the first preset temperature can be obtained.
Example five
This embodiment is a method for evaluating a solid wax-proofing agent using the evaluation apparatus of the second embodiment, the method comprising:
1) Injecting condensate into the first solid paraffin inhibitor containing unit 10 by using the condensate driving unit 0, wherein the first solid paraffin inhibitor containing unit 10 is filled with solid paraffin inhibitor and propping agent, and recording the volume of the condensate driven in;
2) Heating the first solid wax-preventing agent containing unit 10 to a first preset temperature by the first heating unit 12, and discharging condensate in the first solid wax-preventing agent containing unit 10 after a first preset time;
3) Repeating the steps 1) -2) for N times, wherein the first preset time of the N times is different, and N is a positive integer greater than or equal to 1;
4) Obtaining the dissolution rate of the solid wax-proofing agent in unit time at a first preset temperature through the difference value of the condensate oil volumes driven in for N times;
5) Repeating the steps 1) -4) for M times, wherein the first preset temperatures of the M times are different, and M is a positive integer greater than or equal to 1;
6) A temperature-dissolution rate profile of the solid wax inhibitor was established.
The above method is a method for evaluating a solid wax inhibitor under normal pressure using the first test section.
The above steps 1) to 5) are the same as those of the fourth embodiment. In step 5), M sets of temperature-dissolution rate data are obtained for the solid wax inhibitor.
In step 6), a temperature-dissolution rate curve of the solid wax-proofing agent is established according to M groups of temperature-dissolution rate data of the solid wax-proofing agent, and the dissolution rate of the solid wax-proofing agent at a certain temperature can be obtained from the curve, so that a referent data basis is provided for future application in oil fields.
Example six
And (3) taking N groups of time-paraffin control rate data and time-freezing point reduction value data of the third embodiment at the same temperature, multiplying the time data by the dissolution rate data of the fifth embodiment at the same temperature to obtain N groups of dissolution concentration-paraffin control rate data and dissolution concentration-freezing point reduction value data, and establishing a dissolution concentration-paraffin control rate curve and a dissolution concentration-freezing point reduction value curve according to the two groups of data, so as to provide a referenceable data base for the application of the solid paraffin control agent in the field in the future.
Example seven
This embodiment is a method for evaluating a solid wax-proofing agent using the evaluation apparatus of the second embodiment, the method comprising:
1) Injecting condensate into the second solid wax-proofing agent containing unit 20 by using the condensate driving unit 0, wherein the second solid wax-proofing agent containing unit 20 contains solid wax-proofing agent and propping agent;
2) Heating the second solid wax-proofing agent containing unit 20 to a second preset temperature and preset pressure through the second heating unit 22 and the pressure supply unit 23 respectively, and measuring a second physical property parameter of condensate after a second preset time;
3) And establishing a change relation curve of the second physical property parameter and the pressure/temperature.
The method is a method for evaluating a solid wax inhibitor by using the second test section.
The specific operation of step 1) is (using the first core holder 201 in the second solid wax inhibitor holding unit 20): the first valve 011 is closed, the second valve 021 is opened, the first injection valve 201a is opened, and the condensate driving unit 0 is started to inject condensate into the first core holder 201. Wherein, the first core holder 201 contains a mixture of solid wax inhibitor and propping agent, and the solid wax inhibitor accounts for 2% of the propping agent by mass.
The wax content of the condensate also needs to be measured before step 1).
The specific operation of the step 2) is as follows: the second heating unit 22 is turned on to heat the first core holder 201 to a second preset temperature (greater than the wax precipitation point of the condensate), and the confining pressure supply unit 231 and the back pressure supply unit 232 and the corresponding pressure valves of the first core holder 201 are turned on to enable the pressure in the first core holder 201 to reach the preset pressure. After the first preset temperature and the preset pressure are maintained for the second preset time, the back pressure valve 24 is adjusted, the total discharge valve 26 and the recovery valve 21a are opened, and the condensate in the first core holder 201 is discharged to the second condensate recovery unit 21.
The condensate in the second condensate recovery unit 21 is sampled and a second physical property parameter of the oil sample is measured, which may include a value such as the freezing point depression value of the oil sample. The specific measurement method can refer to the standard Q/SY 158-2013 technical Specification for oil recovery and wax control and SY/T6300-2009 technical Condition for oil recovery and wax control.
After the measurement is completed, the condensate oil in the second condensate oil recovery unit 21 is drained, and steps 1) to 2) are repeated N times until the measured freezing point depression value changes, wherein the second preset temperatures of N times are different, the preset pressures of N times are the same, or the second preset temperatures of N times are the same, and the preset pressures of N times are different (the second preset temperatures of N times are all greater than the wax bleeding point of the condensate oil).
Thus, N sets of freezing point depression value-time/pressure data were obtained
In step 3), a corresponding relation curve is made according to the data, and the method comprises the following steps: the solidifying point reduction value-pressure curve and the solidifying point reduction value-temperature curve can obtain the wax-preventing effect of the solid wax-preventing agent in a certain temperature or pressure, thereby providing a referent data base for future application in oil fields.
Of course, the evaluation method of the present invention is not limited to the above-mentioned ones, and any method that can measure data of the relevant condensate and the solid wax inhibitor by using the apparatus of the present invention can be used as the method for evaluating the solid wax inhibitor.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (8)
1. A method for evaluating a solid wax-proofing agent, characterized in that the evaluation is performed by a solid wax-proofing agent evaluation device comprising: a condensate drive unit, a first test section and a second test section;
the first testing part comprises a first solid wax-proofing agent containing unit, a first condensate oil recovery unit and a first heating unit, and the first solid wax-proofing agent containing unit is respectively communicated with the first condensate oil recovery unit and the first heating unit; the condensate oil driving unit is communicated with the first solid paraffin inhibitor containing unit through a first driving pipeline and is used for injecting condensate oil into the first solid paraffin inhibitor containing unit, and a first valve is arranged on the first driving pipeline;
the second testing part comprises a second solid wax-proofing agent containing unit, a second condensate oil recovery unit, a second heating unit and a pressure supply unit, wherein the second solid wax-proofing agent containing unit is respectively communicated with the second condensate oil recovery unit, the second heating unit and the pressure supply unit; the condensate driving unit is communicated with the second solid wax-proofing agent containing unit through a second driving pipeline and is used for injecting condensate into the second solid wax-proofing agent containing unit, and a second valve is arranged on the second driving pipeline;
the second solid wax-proofing agent containing unit comprises a first core holder and a second core holder;
the condensate driving unit is respectively communicated with the first core holder and the second core holder and is used for respectively injecting condensate into the first core holder and the second core holder, a first injection valve is arranged between the condensate driving unit and the first core holder, and a second injection valve is arranged between the condensate driving unit and the second core holder;
a first discharge valve is arranged between the second condensate recovery unit and the first core holder, and a second discharge valve is arranged between the second condensate recovery unit and the second core holder.
2. The evaluation method according to claim 1, wherein the pressure supply unit includes a confining pressure supply unit that supplies confining pressure to the first core holder and the second core holder, respectively, and a back pressure supply unit that supplies back pressure to the first core holder and the second core holder, respectively;
a first confining pressure valve is arranged between the confining pressure supply unit and the first core holder, and a second confining pressure valve is arranged between the confining pressure supply unit and the second core holder.
3. The method of evaluation of claim 2, wherein the second condensate recovery unit is in communication with the first and second core holders, respectively, via a back pressure valve, the second condensate recovery unit being configured to receive condensate discharged by the first and second core holders;
the back pressure valve is also in communication with the back pressure supply unit.
4. The evaluation method according to claim 3, wherein the first condensate recovery unit includes a bottom recovery tank and a top recovery tank, the bottom recovery tank being in communication with the bottom of the first solid wax-inhibitor holding unit through a bottom drain valve, the top recovery tank being in communication with the top of the first solid wax-inhibitor holding unit through a top drain valve.
5. The evaluation method according to claim 4, wherein the solid wax control agent evaluation device further comprises a communicating pipe and a flow meter;
the communicating pipe is communicated with the first solid wax-proofing agent containing unit; the flowmeter is arranged between the back pressure valve and the second condensate recovery unit.
6. The evaluation method according to claim 5, wherein the second test section further comprises a first pressure gauge, a second pressure gauge, a third pressure gauge, a fourth pressure gauge, a fifth pressure gauge;
the first pressure gauge is arranged between the second valve and the second solid wax-proofing agent containing unit, and the second pressure gauge is arranged between the first confining pressure valve and the first core holder; the third pressure gauge is arranged between the confining pressure supply unit and the second confining pressure valve; the fourth pressure gauge is arranged between the back pressure supply unit and the back pressure valve; the fifth pressure gauge is in communication with the first and second discharge valves, respectively.
7. The evaluation method according to any one of claims 1 to 6, comprising the steps of:
injecting condensate into the first solid wax-proofing agent containing unit by utilizing the condensate driving unit, wherein the solid wax-proofing agent and propping agent are contained in the first solid wax-proofing agent containing unit;
heating the first solid wax-proofing agent containing unit to a first preset temperature through the first heating unit, and measuring a first physical property parameter of the condensate oil after a first preset time; the first physical property parameter comprises a wax control rate and a freezing point depression value;
and establishing a change relation curve of the first physical property parameter and time/temperature.
8. The evaluation method according to any one of claims 1 to 6, comprising the steps of:
injecting condensate oil into the second solid wax-proofing agent containing unit by utilizing the condensate oil driving unit, wherein the second solid wax-proofing agent containing unit is filled with the solid wax-proofing agent and the propping agent;
heating the second solid wax-proofing agent containing unit to a second preset temperature and pressurizing to a preset pressure through the second heating unit and the pressure supply unit respectively, and measuring a second physical property parameter of the condensate oil after a second preset time; the second physical property parameter includes a freezing point depression value;
and establishing a change relation curve of the second physical parameter and the pressure/temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710637132.9A CN109307737B (en) | 2017-07-28 | 2017-07-28 | Evaluation device and evaluation method for solid wax inhibitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710637132.9A CN109307737B (en) | 2017-07-28 | 2017-07-28 | Evaluation device and evaluation method for solid wax inhibitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109307737A CN109307737A (en) | 2019-02-05 |
| CN109307737B true CN109307737B (en) | 2024-03-26 |
Family
ID=65204977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710637132.9A Active CN109307737B (en) | 2017-07-28 | 2017-07-28 | Evaluation device and evaluation method for solid wax inhibitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109307737B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101217735B1 (en) * | 2011-10-17 | 2013-01-02 | 한국해양대학교 산학협력단 | Apparatus for formation of solid matter from oil |
| CN203037230U (en) * | 2012-12-08 | 2013-07-03 | 辽宁石油化工大学 | Insulation pipe wax deposition experiment apparatus |
| CN105277659A (en) * | 2015-09-24 | 2016-01-27 | 西南石油大学 | Apparatus and method for dynamic simulation of petroleum pipe scaling and wax precipitation |
| CN105954471A (en) * | 2016-06-27 | 2016-09-21 | 中国石油天然气股份有限公司 | Evaluation device and evaluation method for wax-proofing effect of wax-proofing agent |
| CN106018156A (en) * | 2016-06-23 | 2016-10-12 | 中国石油大学胜利学院 | Dynamic simulation and evaluation device for chemical paraffin remover and evaluation method |
| CN207096213U (en) * | 2017-07-28 | 2018-03-13 | 中国石油天然气股份有限公司 | The evaluating apparatus of solid antiwax agent |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9377392B2 (en) * | 2013-09-05 | 2016-06-28 | Proptester, Inc. | Methods and systems for testing fluids on crushed formation materials under conditions of stress |
-
2017
- 2017-07-28 CN CN201710637132.9A patent/CN109307737B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101217735B1 (en) * | 2011-10-17 | 2013-01-02 | 한국해양대학교 산학협력단 | Apparatus for formation of solid matter from oil |
| CN203037230U (en) * | 2012-12-08 | 2013-07-03 | 辽宁石油化工大学 | Insulation pipe wax deposition experiment apparatus |
| CN105277659A (en) * | 2015-09-24 | 2016-01-27 | 西南石油大学 | Apparatus and method for dynamic simulation of petroleum pipe scaling and wax precipitation |
| CN106018156A (en) * | 2016-06-23 | 2016-10-12 | 中国石油大学胜利学院 | Dynamic simulation and evaluation device for chemical paraffin remover and evaluation method |
| CN105954471A (en) * | 2016-06-27 | 2016-09-21 | 中国石油天然气股份有限公司 | Evaluation device and evaluation method for wax-proofing effect of wax-proofing agent |
| CN207096213U (en) * | 2017-07-28 | 2018-03-13 | 中国石油天然气股份有限公司 | The evaluating apparatus of solid antiwax agent |
Non-Patent Citations (3)
| Title |
|---|
| 中国石油天然气总公司.《采油用清、防蜡剂技术条件》.1997,(第1997版),第1-12页. * |
| 塔河凝析油防蜡剂的研制及防蜡效果评价;梁光川;杨林;蒋宏业;于彦彬;贾振旭;辜启刚;;西安石油大学学报(自然科学版)(06);第58-61, 66页 * |
| 梁光川 ; 杨林 ; 蒋宏业 ; 于彦彬 ; 贾振旭 ; 辜启刚 ; .塔河凝析油防蜡剂的研制及防蜡效果评价.西安石油大学学报(自然科学版).2009,(06),第58-61,66页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109307737A (en) | 2019-02-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2019095800A1 (en) | Fracture conductivity assessment device and method based on gas-liquid two-phase flow in shale fractures | |
| CN106896043B (en) | True triaxial stress Imitating crack initiation and the device for evaluating fisstured flow | |
| CN110296921B (en) | Testing device and testing method for shale gas permeability under reservoir conditions in steady state method | |
| CN110907334B (en) | Device and method for measuring radial flow oil-water relative permeability of conglomerate full-diameter core | |
| CN207379891U (en) | Fractured shale gas-water phases flowing fracture condudtiviy evaluating apparatus | |
| CN108240953B (en) | Device and method for evaluating performance of barite blocking remover | |
| CN103161455B (en) | HTHP shale well wall stability evaluation device | |
| CN108119132B (en) | Tight sandstone gas reservoir near-wellbore-zone radial seepage water saturation simulation device and method | |
| CN107339097B (en) | Leak stoppage evaluation device and method | |
| CN113324889B (en) | Device for evaluating shale oil in-situ pyrolysis exploitation displacement efficiency and testing method | |
| CN107725046A (en) | The apparatus and method of capillary force during a kind of evaluation reservoir water | |
| CN105388254A (en) | High-temperature high-pressure foam fracturing fluid leak-off damage experiment system | |
| CN112798494A (en) | Long core drying seepage experiment device and experiment method | |
| CN105784567A (en) | Equipment and method for testing relative permeability of rock cores | |
| CN105403503A (en) | High-temperature corrosion and erosion testing device of bent pipe column of oil well pipe | |
| CN202381087U (en) | Device for evaluating borehole stability of mud shale at high temperature and high pressure | |
| CN106872329B (en) | Testing device and testing method for measuring liquid permeability of high permeability rock | |
| CN105954471A (en) | Evaluation device and evaluation method for wax-proofing effect of wax-proofing agent | |
| CN108267391A (en) | A kind of experimental provision and method of the evaluation of machine-pumped oil well underground gas-tight tool | |
| CN113310867B (en) | Experimental test method for simulating gas reservoir high-temperature high-pressure stratum reverse osmosis water absorption lock damage | |
| CN205138983U (en) | High temperature corrosion and erosion test device of oil well pipe bucking tubular column | |
| CN204419149U (en) | A kind of proppant and acid etching flow conductivity evaluating apparatus | |
| CN109307737B (en) | Evaluation device and evaluation method for solid wax inhibitor | |
| CN114459974A (en) | Evaluation device and evaluation method for stability of acid fracturing high-temperature temporary plugging agent | |
| CN108196002A (en) | A kind of fracture acidizing is with temporary stall to liquid device for evaluating performance and its test method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |