CN107724999B - A kind of method that the time is added in determining well wax clearing agent for oil - Google Patents
A kind of method that the time is added in determining well wax clearing agent for oil Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000003129 oil well Substances 0.000 claims abstract description 76
- 239000012188 paraffin wax Substances 0.000 claims abstract description 61
- 239000001993 wax Substances 0.000 claims abstract description 48
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 26
- 238000013178 mathematical model Methods 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims description 17
- 239000000126 substance Substances 0.000 claims description 16
- 238000005086 pumping Methods 0.000 claims description 12
- XMHIUKTWLZUKEX-UHFFFAOYSA-N hexacosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCCCCCCCC(O)=O XMHIUKTWLZUKEX-UHFFFAOYSA-N 0.000 claims description 2
- 208000032366 Oversensing Diseases 0.000 claims 3
- 238000004364 calculation method Methods 0.000 abstract 1
- 238000000605 extraction Methods 0.000 abstract 1
- 239000003208 petroleum Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 238000006467 substitution reaction Methods 0.000 description 5
- 239000000725 suspension Substances 0.000 description 3
- 238000000113 differential scanning calorimetry Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000007483 microbial process Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting, e.g. eliminating, the deposition of paraffins or like substances
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- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Lubricants (AREA)
Abstract
The invention discloses a kind of methods that the time is added in determining well wax clearing agent for oil, belong to technical field of petroleum extraction.This method includes initially setting up mathematical model, then according to the correction factor in oil well motor current after a certain oil well is daily plus paraffin remover, CALCULATION OF MAXIMUM POLISHED ROD LOAD mathematical model, determine that producing well adds the paraffin remover time respectively by oil well motor current, MAXIMUM POLISHED ROD LOAD, taking small value between the two is that the time is added in well wax clearing agent for oil.The present invention determines the method that the time is added in well wax clearing agent for oil by founding mathematical models, determines that the well wax clearing agent for oil addition time provides theoretical foundation to be reasonable, has not only met the needs of the normal wax removal of oil well, but also save paraffin remover dosage.
Description
Technical field
The present invention relates to oilfield exploitation technical field, in particular to a kind of method that the time is added in determining well wax clearing agent for oil.
Background technique
Oil well paraffinication phenomenon is generally existing in oilfield development process, has seriously affected the normal production of oil well.Paraffin removing with chemical method
Agent wax removal is one of common wax removal mode of oilfield daily maintenance.
Peng Jianyun et al. is published in " the high-content wax condensation on " science and technology and engineering " the 12nd phase of volume 15 in April, 2015
A gas well paraffin removing with chemical method technique study " text is pointed out: oil well paraffinication influences oil field and normally produces, and chemical Paraffin Removal is a kind of effective
Method.
Dong Xiaohui is published in the " oil well on " Institutes Of Chifeng's journal: natural science edition " the 5th phase of volume 32 in May, 2016
A method wax control wax removal technical principle and application " text is pointed out: the common paraffin removal and control method in oil field has physical method, chemistry side at present
Method, microbial process etc..This project after the sedimentation mechanism and influence factor of wax, gives chemistry side in Main Analysis oil well
The wax removal anti-wax technique of method, method are mainly heat chemistry wax removal technology, chemical method wax-proofing agent technology and chemical method paraffin remover skill
Art.All there is certain adaptability in every kind of paraffin removal and control method, in conjunction with filed application, give specific wax removal agent prescription and reality
Creation data, and propose feasible technology compound scheme, to preferably provide technical support for the normal production of Waxy Production Wells
And help, it is ensured that high output of oilwell, stable yields.
It opens and is published in " the high-wax oil paraffin removing with chemical method drag reducer on " chemical industry progress " the 12nd phase of volume 32 red in December, 2013
Composition and performance " text by carrying out molten wax to a variety of oil-base paraffin removers, resistance reducing performance is studied, screening, compounding relatively optimize clear
Cerate composition, analyzes influence of the factors such as temperature, solvent type to molten wax effect.As a result, it has been found that the meltage and solvent of paraffin
Volume dependency it is little, paraffin amount should control within the molten wax amount of saturation of solvent, and furthermore the time of molten wax is unsuitable too long, reason
Think between 40~100min of selection of time.0.5g paraffin is dissolved i.e. in 10mL solvent and is more conform with actual conditions, and heats shape
The temperature selection of state is more suitable at 35 DEG C or so.It finds simultaneously, surfactant has solubilization to paraffin, only selects
Surfactant of the HLB value in 13~16 ranges can just be conducive to improve the speed of the molten wax of solvent.Using differential scanning calorimetry
Method (DSC) has investigated the hot property and phase transition property of paraffin.The result shows that the influence of temperature factor is particularly significant, and paraffin is molten
Point is higher, and energy required for phase transformation is also bigger, when 44.30 DEG C of melting point of paraffin wax, phase-change energy 29.28J/g.
Although paraffin removing with chemical method agent wax removal solves the problems, such as oil well paraffinication, oil well adds the time of paraffin removing with chemical method agent, on scene
It is determined by motor current, pumping unit maximum polished rod load, but it is often also technology that electric current and load, which rise much amplitudes,
Personnel carry out by rule of thumb, cause plus the paraffin remover time too early or too late, when oil well adds most economical be applicable in of paraffin removing with chemical method agent to be urgently
Problem to be solved.
Summary of the invention
The technical problem to be solved by the embodiment of the invention is that the time of paraffin remover is added in oil well, a kind of determination is provided
The method of well wax clearing agent for oil addition time.Specific technical solution is as follows:
A kind of method that the time is added in determining well wax clearing agent for oil, which comprises
Step 1, founding mathematical models:
In formula one: YiIndicate target oil well i-th day motor maximum current A；Alternatively, target pumping unit of well suspension point
Maximum load KN；
K, a, b are amendment constant；
tjIndicate the time that paraffin removing with chemical method agent is added into oil well, d；
Step 2 calculates amendment constant k, a, b:
Logarithm is taken to one both sides of formula, obtains formula two；
After the target oil well production predetermined period, the predetermined period is divided into three cross-talk period n, obtains every section
Oil well production data in subcycle, comprising: the oil well obtained from oil well automation collection platform is electronic in continuous subcycle n
Machine maximum current or MAXIMUM POLISHED ROD LOAD data, and be used to obtain k, a, b；
The expression formula of paraffin remover time is added in step 3, true directional aim oil well:
B described in a described in k described in formula five, formula four, formula three is substituted into formula two, obtains adding into oil well
Enter the expression formula of paraffin remover time:
Step 4, according to formula six, determine to the time to which paraffin remover is added in wax removal oil well:
The motor maximum current value or MAXIMUM POLISHED ROD LOAD value to wax removal oil well are obtained, and described in substitution
Formula six, respectively obtains tJ electric current、tJ load；
Take tJ electric current、tJ loadIn small value as to in wax removal oil well be added paraffin remover time.
Technical solution provided in an embodiment of the present invention has the benefit that
The method that the time is added in well wax clearing agent for oil is determined by founding mathematical models, rationally to determine that well wax clearing agent for oil is added
Time provides theoretical foundation, has not only met the needs of the normal wax removal of oil well, but also save paraffin remover dosage.
Specific embodiment
Unless otherwise defined, all technical terms used in the embodiment of the present invention all have usual with those skilled in the art
The identical meaning understood.
A kind of method that the time is added in determining well wax clearing agent for oil, this method comprises:
Step 1, founding mathematical models:
In formula one: YiIndicate target oil well i-th day motor maximum current A；Alternatively, target pumping unit of well suspension point
Maximum load KN；
E is natural number；
K, a, b are amendment constant；
tjIndicate the time that paraffin removing with chemical method agent is added into oil well, d；
Step 2 calculates amendment constant k, a, b:
Logarithm is taken to one both sides of formula, obtains formula two；
After target oil well production predetermined period, predetermined period is divided into three cross-talk period n, is obtained in every cross-talk period
Oil well production data, comprising: the oil well obtained from oil well automation collection platform is in the maximum electricity of continuous subcycle n built-in motor
Stream or MAXIMUM POLISHED ROD LOAD data, and be used to obtain k, a, b；
The expression formula of paraffin remover time is added in step 3, true directional aim oil well:
The b of the k of formula five, a of formula four, formula three is substituted into formula two, obtains that the paraffin remover time is added into oil well
Expression formula:
Step 4, according to formula six, determine to the time to which paraffin remover is added in wax removal oil well:
The motor maximum current value or MAXIMUM POLISHED ROD LOAD value to wax removal oil well are obtained, and substitutes into formula
Six, respectively obtain tJ electric current、tJ load；
Take tJ electric current、tJ loadIn small value as to in wax removal oil well be added paraffin remover time.
According to motor current value as YiWith MAXIMUM POLISHED ROD LOAD value as YiAvailable two formula six,
Then substituting into can be calculated tJ electric current、tJ load.Wherein, the motor maximum current value of substitution is that target oil well was preset in the production cycle
Motor maximum current in three subcycles, MAXIMUM POLISHED ROD LOAD value are that target oil well presets in the production cycle three
MAXIMUM POLISHED ROD LOAD value in subcycle.
The beneficial effects of the present invention are:
The method that the time is added in well wax clearing agent for oil is determined by founding mathematical models, rationally to determine that well wax clearing agent for oil is added
Time provides theoretical foundation, the accurate time for controlling paraffin remover and oil well being added, has not only met the needs of the normal wax removal of oil well, but also section
Paraffin remover dosage is saved.
More than 150 mouth oil well applications, individual well add the paraffin remover period averagely to extend 5.8 days to the present invention at the scene, and annual individual well is flat
It reduces and adds paraffin remover 6.4 times, individual well averagely saves 1.28 tons of paraffin remover.
Predetermined period is divided into three cross-talk period n, obtains every cross-talk period by above-mentioned target oil well production predetermined period
Interior oil well production data refer to a period of time in acquisition actual production process, after this section of time trisection, in every cross-talk
First day plus the paraffin remover of time, record later daily oil well motor maximum current and MAXIMUM POLISHED ROD LOAD, makees
For the data for calculating amendment constant k, a, b.
Specific embodiment: XX-43 well, oil well add paraffin removing with chemical method agent to carry out daily production maintenance, 15 days plus paraffin remover
200kg。
The foundation of step 1, mathematical model:
In formula one: YiIndicate the motor maximum current of a certain oil well some day, A or a certain pumping unit of well suspension point are most
Big load, KN；
E is natural number, is approximately equal to 2.718281828；
K, a, b are amendment constant；
tjIndicate that oil well adds paraffin removing with chemical method agent time, d.
In each plus paraffin remover period, after XX-43 well adds paraffin remover, oil well motor maximum current and pumping unit hanging point are carried
Lotus data are shown in Table 1.
Table 1:XX-43 well adds oil well motor maximum current and oil pumping machine polished rod load data after paraffin remover
Step 2 calculates amendment constant k, a, b:
From above table as can be seen that oil well paraffinication initial stage is slow, with the formation of wax crystalline substance attachment, wax deposition amount is significantly
Increase, rises to the regular period, i.e., should take wax removal measure, oil well paraffinication, wax removal carry out again and again like this.
Logarithm is taken to one both sides of formula.
After target oil well production predetermined period, predetermined period is divided into three cross-talk period n, is obtained in every cross-talk period
Oil well production data, comprising: the oil well obtained from oil well automation collection platform is in the maximum electricity of continuous subcycle n built-in motor
Stream or MAXIMUM POLISHED ROD LOAD data, and be used to obtain k, a, b.
It is respectively as follows: by k, a, b that oil well motor maximum current is calculated according to formula three, formula four, formula five
K, a, b difference being calculated by pumping unit of well maximum polished rod load according to formula three, formula four, formula five
Are as follows:
Step 3 determines that oil well adds the expression formula of paraffin remover time:
K, a, b value being calculated substitution formula two are obtained calculating the expression formula that determining oil well adds the paraffin remover time.
It obtains calculating determining oil well by the substitution formula two that k, a, b value is calculated in oil well motor maximum current and adds wax removal
The expression formula of agent time.
It obtains calculating determining oil well by the substitution formula two that k, a, b value is calculated in pumping unit of well maximum polished rod load and add
The expression formula of paraffin remover time.
Step 4 determines that oil well adds the paraffin remover time
The oil well motor maximum current value of setting, MAXIMUM POLISHED ROD LOAD value are substituted into formula six, obtain tJ electric current、
tJ load；It is d (t that oil well, which adds the paraffin remover time to take the two smaller value,J electric current,tJ load)=(27.69,20.02)=20.02, scene takes
Whole, XX-43 well adds the paraffin remover period 20 days.
XX-43 well adds the paraffin remover period to be 20 days, and than original plus paraffin remover cycle stretch-out 5 days, whole year reduces plus paraffin remover 6
It is secondary, save 1.2 tons of paraffin remover.
The foregoing is merely a prefered embodiment of the invention, the protection scope being not intended to limit the invention, all of the invention
Within spirit and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (1)
1. a kind of method that the time is added in determining well wax clearing agent for oil, which is characterized in that the described method includes:
Step 1, founding mathematical models:
In formula one: YiIndicate target oil well i-th day motor maximum current A；Alternatively, target pumping unit of well maximum polished rod
Load KN；
K, a, b are amendment constant；
tjIndicate the time that paraffin removing with chemical method agent is added into oil well, tjUnit be day；
Step 2 calculates amendment constant k, a, b:
Logarithm is taken to one both sides of formula, obtains formula two；
After the target oil well production predetermined period, the predetermined period is divided into three cross-talk period n, in three cross-talk
First day addition paraffin remover in every cross-talk period in period n, obtains the oil well production data in every cross-talk period, comprising: from
The oil well that oil well automation collection platform obtains is maximum in continuous subcycle n built-in motor maximum current or pumping unit hanging point
Load data, and be used to obtain k, a, b；
In formula three, formula four and formula five: ∑1lnYiIt represents in the three cross-talks period n, first in first segment subcycle
The logarithm of the value of it motor maximum current, until the value of the motor maximum current of the last day in first segment subcycle
The sum of logarithm；Alternatively, the logarithm of the value of first day MAXIMUM POLISHED ROD LOAD in first segment subcycle, until the first cross-talk
The sum of the logarithm of the value of the MAXIMUM POLISHED ROD LOAD of last day in period；
∑2lnYiIt represents in the three cross-talks period n, the value of first day motor maximum current in second segment subcycle
Logarithm, until the sum of the logarithm of the value of the motor maximum current of the last day in second segment subcycle；Alternatively, the second cross-talk is all
The logarithm of the value of first day MAXIMUM POLISHED ROD LOAD in phase, until the pumping unit of the last day in second segment subcycle
The sum of the logarithm of the value of maximum polished rod load；
∑3lnYiIt represents in the three cross-talks period n, the value of first day motor maximum current in the third cross-talk period
Logarithm, until the sum of the logarithm of the value of the motor maximum current of the last day in the third cross-talk period；Alternatively, third cross-talk week
The logarithm of the value of first day MAXIMUM POLISHED ROD LOAD in phase, until the pumping unit of the last day in the third cross-talk period
The sum of the logarithm of the value of maximum polished rod load；
The expression formula of paraffin remover time is added in step 3, true directional aim oil well:
B described in a described in k described in formula five, formula four, formula three is substituted into formula two, obtains being added into oil well clear
The expression formula of cerate time:
Step 4, according to formula six, determine to the time to which paraffin remover is added in wax removal oil well:
The motor maximum current value or MAXIMUM POLISHED ROD LOAD value to wax removal oil well are obtained, and substitutes into the formula
Six, respectively obtain tJ electric current、tJ load；
Take tJ electric current、tJ loadIn small value as to in wax removal oil well be added paraffin remover time.
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| CN108798598B (en) * | 2018-06-06 | 2021-04-30 | 中国石油天然气股份有限公司 | Electric heating method and device for oil well |
| CN111101922A (en) * | 2018-10-26 | 2020-05-05 | 中国石油天然气股份有限公司 | Method and system for evaluating wax-proof effect of solid wax-proof agent |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2274689Y (en) * | 1996-09-09 | 1998-02-18 | 大庆石油管理局第四采油厂 | Wax monitor for sucking oil well |
| RU2186200C2 (en) * | 2000-06-09 | 2002-07-27 | Закрытое акционерное общество "Рэнес" | Method of eliminating asphalt-resinous-paraffin accumulations in well |
| WO2010151176A2 (en) * | 2009-06-25 | 2010-12-29 | Общество С Ограниченной Ответственностью "Ht" | Method and device for eliminating paraffin deposits and hydrate plugs in oil and gas wells |
| CN102287167A (en) * | 2011-07-29 | 2011-12-21 | 中国石油天然气股份有限公司 | Method for removing and preventing wax of mechanical recovery well by microorganism |
| CN102787827A (en) * | 2012-08-30 | 2012-11-21 | 上海减速机械厂有限公司 | Electromagnetic paraffin-inhibiting viscosity reducer |
| CN105089559A (en) * | 2015-07-30 | 2015-11-25 | 中国石油天然气股份有限公司 | Automatic paraffin removing device for oil well |
-
2017
- 2017-09-27 CN CN201710888954.4A patent/CN107724999B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2274689Y (en) * | 1996-09-09 | 1998-02-18 | 大庆石油管理局第四采油厂 | Wax monitor for sucking oil well |
| RU2186200C2 (en) * | 2000-06-09 | 2002-07-27 | Закрытое акционерное общество "Рэнес" | Method of eliminating asphalt-resinous-paraffin accumulations in well |
| WO2010151176A2 (en) * | 2009-06-25 | 2010-12-29 | Общество С Ограниченной Ответственностью "Ht" | Method and device for eliminating paraffin deposits and hydrate plugs in oil and gas wells |
| CN102287167A (en) * | 2011-07-29 | 2011-12-21 | 中国石油天然气股份有限公司 | Method for removing and preventing wax of mechanical recovery well by microorganism |
| CN102787827A (en) * | 2012-08-30 | 2012-11-21 | 上海减速机械厂有限公司 | Electromagnetic paraffin-inhibiting viscosity reducer |
| CN105089559A (en) * | 2015-07-30 | 2015-11-25 | 中国石油天然气股份有限公司 | Automatic paraffin removing device for oil well |
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