CN105673004B - A method of exploitation high pour point oil reservoir - Google Patents
A method of exploitation high pour point oil reservoir Download PDFInfo
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- CN105673004B CN105673004B CN201511024700.5A CN201511024700A CN105673004B CN 105673004 B CN105673004 B CN 105673004B CN 201511024700 A CN201511024700 A CN 201511024700A CN 105673004 B CN105673004 B CN 105673004B
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- oil reservoir
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- pour point
- reservoir
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 claims abstract description 46
- 239000012530 fluid Substances 0.000 claims abstract description 30
- 239000003129 oil well Substances 0.000 claims abstract description 23
- 238000009826 distribution Methods 0.000 claims abstract description 22
- 238000012360 testing method Methods 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 22
- 239000001993 wax Substances 0.000 claims description 10
- 230000008014 freezing Effects 0.000 claims description 8
- 238000007710 freezing Methods 0.000 claims description 8
- 239000012188 paraffin wax Substances 0.000 claims description 6
- 238000001556 precipitation Methods 0.000 claims description 6
- 230000035699 permeability Effects 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 15
- 239000003921 oil Substances 0.000 description 80
- 239000007789 gas Substances 0.000 description 25
- 238000005755 formation reaction Methods 0.000 description 20
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 239000010779 crude oil Substances 0.000 description 5
- 238000011161 development Methods 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 5
- 239000003345 natural gas Substances 0.000 description 4
- 230000001112 coagulating effect Effects 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 239000002199 base oil Substances 0.000 description 1
- 230000003542 behavioural effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000002595 cold damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
- E21B49/087—Well testing, e.g. testing for reservoir productivity or formation parameters
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Lubricants (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The embodiment of the present application discloses a kind of method for developing high pour point oil reservoir, it include: the sample for obtaining geologic information, well-log information and target area oil reservoir fluid, the distribution of the oil reservoir is obtained, determines the geologic feature of the target area and the chemical composition and attribute of the reservoir fluid;Draw the first curve of the target area reservoir fluid;Production method corresponding with the distribution of the oil reservoir of the target area is determined according to the geologic information;The oil well of target area is tested, the test result under different production systems is obtained;The best production system that the target area oil well is determined according to the first curve of the target area carries out the exploitation of high pour point oil reservoir using the best production system to above-mentioned target area.The method of exploitation high pour point oil reservoir provided by the embodiments of the present application, can be improved the recovery ratio of primary oil recovery.
Description
Technical field
This application involves Oil-Gas Field Development Engineering technical field, in particular to a kind of method for developing high pour point oil reservoir.
Background technique
High pour point oil reservoir generally refers to the oil reservoir that crude oil freezing point is greater than 10% greater than 40 degrees Celsius, paraffin content.The solidifying oil of height
Reservoir Crude Oil property has the characteristics that " three high ", i.e., paraffin content is high, freezing point is high, wax precipitation point is high.Paraffin content range 10%~
57%, generally 20%~40%;Freezing point is generally 25~59 degrees Celsius, up to 67 degrees Celsius;Wax precipitation point general 40~
74 degrees Celsius.High pour point oil reservoir is extremely sensitive to temperature, has unique three-stage viscosity-temperature curve feature, therefore general
Waterflooding extraction during easily there is cold damage, cause in-place oil analysis wax, pore constriction blocking, reservoir permeability decline, produce
Measure rapid decrement.
The production technique of high pour point oil reservoir and method with Oil Reservoir Types, the differences of base oil properties and it is different.The solidifying oil of height is being analysed
Nowed forming has apparent difference before and after wax, Newton and non-Newton fluid flow characteristics is presented respectively, therefore lead to height
Solidifying oil oil reservoir and the conventional development scheme of oil reservoir are different, and when temperature influences the deciding factor of high solidifying oil seepage characteristic, while original
Oil viscosity is especially sensitive to temperature change, and as temperature reduces, the solidifying oily percolation ability of height sharply declines, before crude oil wax precipitation point
Afterwards, this variation is more obvious, and the fluid ability under freezing point is almost nil.
When high pour point oil reservoir is developed using natural energy, there are following behavioral characteristics: one, initial stage of development yield
Height, rate of oil production is high, reaches production peak in a short time, stable production period is short, and lapse rate is big.Two, aqueous aobvious with recovery percent of reserves relationship
" three low one is high " feature is shown: anhydrous period recovery percent of reserves is low, low Water-cut Period recovery percent of reserves is low, natural water drive low efficiency, containing waterborne
The rate of liter is high.Three, new well primiparity declines year by year, and stimulation effect has variation trend.Four, excessive use natural energy exploitation makes ground
Stressor layer is lower than crude oil saturation pressure, and crude oil deaeration, light hydrocarbon component are precipitated, and will lead to high pour point oil reservoir analysis wax problem, leads to oil
Natural declining rate is high during the later development of field, aqueous rising is fast, recovery percent of reserves is low, recovery ratio is low.
Summary of the invention
The purpose of the embodiment of the present application is to provide a kind of method for developing high pour point oil reservoir, to improve the harvesting of primary oil recovery
Rate.
In order to solve the above technical problems, a kind of method that the embodiment of the present application provides exploitation high pour point oil reservoir is realized in
:
A method of exploitation high pour point oil reservoir, comprising:
The sample for obtaining geologic information, well-log information and target area oil reservoir fluid, obtains the oil reservoir
Distribution, determines the geologic feature of the target area and the chemical composition and attribute of the reservoir fluid;Draw the target
First curve of region reservoir fluid;
Production method corresponding with the distribution of the oil reservoir of the target area is determined according to the geologic information;
The oil well of target area is tested, the test result under different production systems is obtained;
The best production system that the target area oil well is determined according to the first curve of the target area, utilizes institute
State the exploitation that best production system carries out high pour point oil reservoir to above-mentioned target area.
In preferred embodiment, first curve includes: the viscosity and vs. temperature for describing the reservoir fluid
Curve.
In preferred embodiment, the geologic feature includes: oil area, oil-water interfaces information, permeability and porosity.
In preferred embodiment, the distribution of the oil reservoir includes: that oil reservoir gas-bearing formation is continuously distributed, is divided or, oil reservoir gas-bearing formation intersects
Cloth.
In preferred embodiment, the attribute of the reservoir fluid includes: freezing point, paraffin content and/or wax precipitation point.
In preferred embodiment, the production method comprises determining that the purpose of horizon, perforating depth and shot density of perforation.
In preferred embodiment, the difference production system includes: different choke sizes and/or different production durations.
In preferred embodiment, the test result includes: the thermo parameters method situation of pit shaft, the distribution of the pressure of pit shaft, well head
Temperature, well head pressure and capacity of well.
In preferred embodiment, the method also includes: real-time monitoring is carried out to the first state of the target area oil well.
In preferred embodiment, the first state includes: that oily well yield, the production gas-oil ratio of oil well, oil well fluid contain
Water rate, wellhead temperature and/or well head pressure.
As can be seen from the technical scheme provided by the above embodiments of the present application, a kind of exploitation high pour point oil reservoir of the embodiment of the present application
The temperature and pressure of pit shaft can be maintained at a higher level, adopting for primary oil recovery can be greatly improved by method
Yield greatly reduces the cost of operation, has achieved the purpose that economical and efficient develops high pour point oil reservoir.It is also convenient for simultaneously to oil gas
Collection is defeated and processing is operated.On the other hand, asking for reservoir damage can effectively be avoided using natural gas lift method in situ
Topic, convenient for the adjustment of subsequent production measure.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application, for those of ordinary skill in the art, in the premise of not making the creative labor property
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the flow chart of method one embodiment that the application develops high pour point oil reservoir;
Fig. 2 is the schematic diagram of reservoir distribution in the embodiment of the present application;
Fig. 3 is an example of the first curve in the embodiment of the present application;
Fig. 4 is an example of the embodiment of the present application oil well output and temperature in wellbore.
Specific embodiment
The embodiment of the present application provides a kind of method for developing high pour point oil reservoir.
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
The application protection all should belong in technical staff's every other embodiment obtained without creative efforts
Range.
Fig. 1 is the flow chart of method one embodiment that the application develops high pour point oil reservoir.As shown in Figure 1, shown method
May include:
S101: obtaining the sample of geologic information, well-log information and target area oil reservoir fluid, obtains the oil reservoir storage
The distribution of layer, determines the geologic feature of the target area and the chemical composition and attribute of the reservoir fluid;Described in drafting
First curve of target area reservoir fluid.
Available geologic information, the geologic information may include: the corresponding reservoir distribution feature of oil reservoir.
Well-log information can also be obtained.The ground of the target area can be determined according to the geologic information and well-log information
Matter feature.The geologic feature may include: oil area, oil-water interfaces information, permeability and porosity.
The sample of available target area oil reservoir fluid, and obtain the distribution of the oil reservoir.The oil reservoir
It is continuously distributed that the distribution of reservoir can be oil reservoir gas-bearing formation, it is also possible to oil reservoir gas-bearing formation cross-distribution.Fig. 2 is reservoir point in the application
The schematic diagram of cloth.(a) describes the continuously distributed oil reservoir of oil reservoir gas-bearing formation in Fig. 2, (b) describes oil reservoir gas-bearing formation intersection
The oil reservoir of distribution.
The attribute of the reservoir fluid may include: freezing point, paraffin content and/or wax precipitation point.The attribute of the fluid is also
It may include fluid viscosity, fluid permeability.According to the attribute of the reservoir fluid, the target area reservoir stream can be drawn
First curve of body.
First curve can be the curve of viscosity and vs. temperature for describing the reservoir fluid.Fig. 3
It is an example of the first curve in the application embodiment of the method.In Fig. 3, what abscissa indicated is temperature, and unit is degree Celsius
(℃);What ordinate indicated is viscosity, and unit is mpas (mPa*s).
Further, the method can also include: to judge whether the oil reservoir of the target area meets the first default item
Part.First preset condition may include at least one of following: (1) having continuous or segmentation reservoir, and include
Gas-bearing formation;(2) pressure of gas-bearing formation is greater than the pressure of oil reservoir;(3) reserves of gas-bearing formation are greater than the reserves of oil reservoir;(4) gas-bearing formation is located at oil reservoir
Lower section or gas-bearing formation and oil reservoir cross-distribution.
S102: production method corresponding with the distribution of the oil reservoir of the target area is determined according to the geologic information.
Production method corresponding with the distribution of the oil reservoir of the target area can be determined according to the geologic information.Institute
State the purpose of horizon that production method may include: determining perforation, perforating depth and shot density.
Specifically, the production method may include: that oil reservoir can be penetrated out all.Further, the generating mode is also
It may include: that gas-bearing formation can be with partial penetrating, alternatively, reducing the shot density of the gas-bearing formation.For example, the 1 of gas-bearing formation can only be penetrated out
~2 meters, alternatively, the shot density of the gas-bearing formation can be reduced to 8 holes/rice, alternatively, can be by the shot density of the gas-bearing formation
It is reduced to 8 holes/rice.
By selecting suitable production method, the production capacity of oil reservoir and gas-bearing formation can be made to be optimized and be maximized.
S103: testing the oil well of target area, obtains the test result under different production systems.
It is tested by the oil well to target area, the test result under available difference production method.The survey
Test result may include: the thermo parameters method situation of pit shaft, the distribution of the pressure of pit shaft, the life of wellhead temperature, well head pressure and well
Production capacity power.
The difference production system may include: different choke sizes and/or different production durations.
Table 1 is the generation system of oil well in the application and an example of test result.
Table 1
It is possible to further analyze the test result.It, can be with by analyzing the result of the test
The reasonability of production method in judgment step S102, and can decide whether the necessity with adjustment production method.
S104: the best production system of the target area oil well is determined according to the first curve of the target area fluid
Degree carries out the exploitation of high pour point oil reservoir using the best production system to above-mentioned target area.
The best production system of the target area oil well is determined according to the viscosity temperature curve of the target area fluid
Degree can use the exploitation that the best production system carries out high pour point oil reservoir to above-mentioned target area.
The best producer system can make the mixed oil and gas temperature for giving rise to ground be higher than freezing point, keep good
Mobility, the collection convenient for ground it is defeated and processing.
Further, the method can also include: to carry out real-time monitoring to the first state of the target area oil well;
The first state may include: oily well yield, the production gas-oil ratio of oil well, the moisture content of oil well fluid, well
Mouth temperature and/or well head pressure etc..
Fig. 4 is an example of the application oil well output and temperature in wellbore.In figure, abscissa indicates oil yield, and unit is
Bucket oil/day.
Further, the method can also include: according to the real-time monitoring result to determine whether needing to change life
Production mode.Such as, if needs penetrate out other gas-bearing formations to maintain the production of oil well.
In practical recovery process, after one period of oil reservoir development, when the yield of gas-bearing formation is unable to satisfy lifting, Ke Yixuan
It selects artificial gas injection lifting or thermal recovery mode further produces.Such as it can be in conjunction with oil recovery by heating, carbon dioxide flooding, chemical flooding etc.
Method is exploited.
Using natural gas lift method in situ, it on the one hand can use the spontaneous gas-bearing formation of reservoir and come for the high production supplement for coagulating oil
Energy avoids high solidifying oil degassing;On the other hand, natural gas is dissolved in high solidifying oil, can improve the high oil product for coagulating oil, is reduced solidifying
The problem of solid point reduces the high viscosity for coagulating oil, can slow down high solidifying oil analysis wax.
The temperature and pressure of pit shaft can be maintained at one by a kind of high pour point oil reservoir recovery method provided by the above embodiment
A higher level, it is defeated convenient for the collection to oil gas and processing operates.The cost for greatly reducing operation has reached economic height
The purpose of effect exploitation high pour point oil reservoir.Meanwhile reservoir damage can be effectively avoided the problem that using natural gas lift method in situ,
The recovery ratio of primary oil recovery can be greatly improved, convenient for the adjustment of subsequent production measure.
All the embodiments in this specification are described in a progressive manner, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.
Although depicting the application by embodiment, it will be appreciated by the skilled addressee that the application there are many deformation and
Variation is without departing from spirit herein, it is desirable to which the attached claims include these deformations and change without departing from the application's
Spirit.
Claims (9)
1. a kind of method for developing high pour point oil reservoir characterized by comprising
The sample for obtaining geologic information, well-log information and target area oil reservoir fluid, obtains the distribution of the oil reservoir,
Determine the geologic feature of the target area and the chemical composition and attribute of the reservoir fluid;Draw the target area storage
First curve of layer fluid;
Production method corresponding with the distribution of the oil reservoir of the target area, the producer are determined according to the geologic information
Formula comprises determining that the purpose of horizon, perforating depth and shot density of perforation;
The oil well of target area is tested, the test result under different production systems is obtained;
The best production system that the target area oil well is determined according to the first curve of the target area, using it is described most
Good production system carries out the exploitation of high pour point oil reservoir to above-mentioned target area.
2. a kind of method for developing high pour point oil reservoir as described in claim 1, which is characterized in that first curve includes:
For describing the viscosity of the reservoir fluid and the curve of vs. temperature.
3. a kind of method for developing high pour point oil reservoir as described in claim 1, which is characterized in that the geologic feature includes:
Oil area, oil-water interfaces information, permeability and porosity.
4. a kind of method for developing high pour point oil reservoir as described in claim 1, which is characterized in that the distribution of the oil reservoir
It include: that oil reservoir gas-bearing formation is continuously distributed, or, oil reservoir gas-bearing formation cross-distribution.
5. a kind of method for developing high pour point oil reservoir as described in claim 1, which is characterized in that the attribute of the reservoir fluid
It include: freezing point, paraffin content and/or wax precipitation point.
6. a kind of method for developing high pour point oil reservoir as described in claim 1, which is characterized in that the difference production system packet
It includes: different choke sizes and/or different production durations.
7. a kind of method for developing high pour point oil reservoir as described in claim 1, which is characterized in that the test result includes:
Thermo parameters method situation, the distribution of the pressure of pit shaft, wellhead temperature, well head pressure and the capacity of well of pit shaft.
8. a kind of method for developing high pour point oil reservoir as described in claim 1, which is characterized in that the method also includes: it is right
The first state of the target area oil well carries out real-time monitoring.
9. a kind of method for developing high pour point oil reservoir as claimed in claim 8, which is characterized in that the first state includes:
Oily well yield, the production gas-oil ratio of oil well, the moisture content of oil well fluid, wellhead temperature and/or well head pressure.
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CN107630688B (en) * | 2017-11-09 | 2020-06-02 | 中国石油大港油田勘探开发研究院 | Novel technical evaluation method for dilution-doping cold recovery of high-pour-point oil reservoir stratum |
CN110714749A (en) * | 2019-11-11 | 2020-01-21 | 西安石油大学 | High-pour-point oil reservoir productivity evaluation method considering influence of pressure on viscosity |
CN112465218B (en) * | 2020-11-25 | 2024-03-12 | 中海石油(中国)有限公司 | Offshore thin interbed sandstone oilfield layer system division and perforation scheme optimization method |
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2015
- 2015-12-30 CN CN201511024700.5A patent/CN105673004B/en active Active
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EP0091252A1 (en) * | 1982-04-01 | 1983-10-12 | Mobil Oil Corporation | Two-step catalytic hydrodewaxing-hydrodesulfurization process |
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