CN109856329A - A kind of measuring method of oil-sand to foaming agent adsorbance - Google Patents
A kind of measuring method of oil-sand to foaming agent adsorbance Download PDFInfo
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- CN109856329A CN109856329A CN201910061130.9A CN201910061130A CN109856329A CN 109856329 A CN109856329 A CN 109856329A CN 201910061130 A CN201910061130 A CN 201910061130A CN 109856329 A CN109856329 A CN 109856329A
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- foaming agent
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Abstract
The invention discloses a kind of oil-sands to the measuring method of foaming agent adsorbance, measuring method include foaming agent blistering front and back concentration difference determination, oil-sand absorption and adsorbance calculate and etc.；Wherein the determination of foaming agent blistering front and back concentration difference is to determine experimental material and the operating process loss caused by foaming agent concentration, oil-sand absorption is to immerse oil-sand in the foaming agent after blistering, and measure the concentration of foaming agent after oil-sand absorption, adsorbance calculating is the test data measured according to front, calculates oil-sand to the adsorbance of foaming agent by specific formula.Using the method in the present invention, purpose of the Accurate Determining oil-sand to the adsorbance of foaming agent to control effectively to the dosage of foaming agent may be implemented.
Description
Technical field
The invention belongs to technology of reservoir sweep fields, and in particular to a kind of measuring method of oil-sand to foaming agent adsorbance.
Background technique
In the recovery process of existing crude oil, the recovery ratio of crude oil is the product of sweep efficiency and displacement efficiency, therefore, is improved
There are mainly two ways for recovery ratio, first is that improving sweep efficiency, mainly can improve aperture by blocking high permeability formation and macropore
The swept volume in road, or displacing agent mobility etc. is reduced to realize；Second is that improving displacement efficiency, main method is to change rock table
The wetability in face and the adverse effect for reducing capillarity, generally utilize foaming agent (surfactant) Lai Shixian.But
During changing the wetability of rock surface and reducing capillarity, foaming agent when porous oil reservoir by rock by that may be inhaled
It is attached, be detained and lose, this not only declines the effective concentration of foaming agent, but also may cause foam formulation deviation and meticulously screen
Optimum range, to influence oil displacement efficiency.Therefore, Accurate Determining oil-sand has the adsorbance of foaming agent to tar productivity is improved
Active promoting function.
Summary of the invention
For the above-mentioned prior art, the present invention provides a kind of oil-sand to the measuring method of foaming agent adsorbance, to reach quasi-
Really purpose of the measurement oil-sand to the adsorbance of foaming agent to control effectively to the dosage of foaming agent.
In order to achieve the above object, the technical scheme adopted by the invention is that: provide a kind of oil-sand to foaming agent adsorbance
Measuring method, comprising the following steps:
(1) determination of foaming agent solution blistering front and back concentration difference: taking initial concentration is C0Foaming agent solution V mL, with
The rate stirring 20 of 500~1000rpm~for 24 hours, complete blistering；Oil-sand carrier is immersed in foam again, with oil-sand carrier base
Subject to just being contacted with the foaming agent solution that bottom does not blister, 20~for 24 hours afterwards measure bottom foaming agent solution concentration C1, blistering
Agent solution blistering front and back concentration difference Cc=C0-C1；The oil-sand carrier is followed successively by polyester layer and red copper silk screen from top to bottom；
(2) it blisters by the method in step (1) to foaming agent solution, then carries the oil-sand for being placed with m g oil-sand
Body immerses in foam, and oil-sand carrier base of being subject to just is contacted with the foaming agent solution that bottom does not blister, 20~measure afterwards for 24 hours
The concentration C of bottom foaming agent solution2；The ratio of the volume V of the quality m and foaming agent solution of oil-sand is 1:1~10g/mL；
(3) adsorbance calculates: calculating oil-sand adsorbance P (mg/g) according to the data that step (1) and step (2) measure, inhales
Attached amount P is calculated according to the following formula:
In formula, M is the molal weight of foaming agent.
Based on the above technical solution, the present invention can also be improved as follows.
Further, the solute of foaming agent solution is XYH-4 type foaming agent, and solvent is that salinity is 10000~170000mg/
The water of L；Its initial concentration C0For 0.03wt%~0.08wt%.
Further, C1And C2It is measured using benzyl chloride Soviet Union standard solution by diphasic titration.
Further, the ratio of the volume V of the quality m and foaming agent of oil-sand is 1:4g/mL in step (2).
Further, the partial size of oil-sand is 100~200 mesh.
The beneficial effects of the present invention are: the present invention is by designing a kind of oil-sand to the adsorption experiment of foaming agent, by foaming agent
Contacted after blistering with oil-sand, can accurate simulation oil-sand is to the absorption situation of foaming agent under ground environment, to practical oil recovery process
The selection of middle foaming agent type, concentration, dosage etc. provides theoretical direction, can increase substantially tar productivity.
Detailed description of the invention
Fig. 1 is the influence that solid-liquid compares foaming agent adsorbance；
Fig. 2 is influence of the foaming agent initial concentration to adsorbance；
Fig. 3 is influence of the oil-sand salinity to adsorbance.
Specific embodiment
Experimental method
1. configuring foaming agent solution:
XHY-4 type foaming agent is selected, initial concentration C is respectively configured with the water that salinity is 10000~170000mg/L0For
The foaming agent solution of 0.03wt% and 0.08wt%.
2. blank test:
Taking initial concentration is C0Foaming agent solution V mL be put into bubbling container, then stirred with magnetic stirring apparatus or machinery
Device is mixed with the rate of 500~1000rpm stirring 20~for 24 hours, until the depth of foam in bubbling container is 10cm or so, is completed
Bubble；Oil-sand carrier is immersed in foam again, oil-sand carrier base of being subject to just is contacted with the foaming agent solution that bottom does not blister,
20~for 24 hours afterwards measure bottom foaming agent solution concentration C1, C1Standard solution (the 0.00003944mol/ to be revived using benzyl chloride
L it) is measured by diphasic titration；The size and shape of oil-sand carrier and the opening of bubbling container are suitable comprising upper layer
Polyester layer and lower layer red copper silk screen.Foaming agent solution blistering front and back concentration difference CcAre as follows:
Cc=C0-C1
The concentration difference C of foaming agent solutioncThe influence of bubbling process and experimental material to foaming agent concentration is reflected,
During finally calculating adsorbance, the concentration difference is deducted, as oil-sand is to the accurate adsorbance of foaming agent, and the result measured is more
It is accurate to add.
2. oil-sand adsorbs:
Taking initial concentration is C0Foaming agent solution V mL be put into bubbling container, then stirred with magnetic stirring apparatus or machinery
Device is mixed with the rate of 500~1000rpm stirring 20~for 24 hours, until the depth of foam in bubbling container is 10cm or so, is completed
Bubble；Then the oil-sand (100~200 mesh) that quality is m g is placed on oil-sand carrier and is immersed in foam, and by oil-sand carrier and
Oil-sand is totally immersed in foam, and oil-sand carrier base of being subject to just is contacted with the foaming agent solution that bottom does not blister, 20~
Measure the concentration C of bottom foaming agent solution afterwards for 24 hours2, C2Standard solution (0.00003944mol/L) using benzyl chloride Soviet Union is logical
Diphasic titration is crossed to be measured；The ratio of the volume V of the quality m and foaming agent of oil-sand is 1:1~10g/mL.
3. calculating adsorbance:
Summarize all data measured, and calculate the adsorbance P (mg/g) of oil-sand according to these data, adsorbance P according to
Following formula calculates:
In formula, M is the molal weight (g/mol) of foaming agent.
Below with reference to embodiment, specific embodiments of the present invention will be described in detail.
The influence of the ratio between embodiment one, oil-sand quality m (g) and foaming agent solution volume V (mL) (solid-liquid ratio) to adsorbance
XHY-4 type foaming agent is selected, and initial concentration C is respectively configured0Foaming agent for 0.03wt% and 0.08wt% is molten
Liquid.During the experiment, the solid-to-liquid ratio of 1:1,1:2,1:3,1:4,1:6,1:8 and 1:10 is respectively adopted, investigates solid-liquid and compares
The influence of adsorbance, other experiment conditions are constant.
Tables 1 and 2 lists foaming agent solution initial concentration C respectively0It is when for 0.03wt% and 0.08wt% as a result, from
In it can be seen that solid-liquid compare adsorbance also have certain influence.When the effective concentration of foaming agent solution is 0.03wt%,
When solid-liquid ratio is less than 1:4, as the increase adsorbance of solid-to-liquid ratio is stepped up, but reaches the later adsorbance of 1:4 and is basically unchanged,
This explanation has reached saturation absorption, and the adsorbance of foaming agent XHY-4 is 0.3023mg/g at this time.It is effective dense when foaming agent solution
When degree is 0.08%, the adsorbance trend of foaming agent XHY-4 is in first to rise to decline afterwards, reaches maximum when solid-liquid ratio reaches 1:3
Value, adsorbance is 0.3365mg/g at this time.Adsorption curve is obviously bent downwardly after solid-liquid ratio 1:3, i.e., under large amount of adsorption amplitude
Drop.The influence that solid-liquid compares foaming agent adsorbance is as shown in Figure 1.
When 1 foaming agent concentration of table is 0.03%, solid-liquid compares the influence of foaming agent adsorbance
When 2 foaming agent concentration of table is 0.08%, solid-liquid compares the influence of foaming agent adsorbance
Embodiment two, foaming agent solution initial concentration C0Influence to adsorbance
In order to accurately determine the adsorbance of foaming agent, it is necessary to be demarcated to foaming agent concentration.Table 3 gives titration experiments
In calibration result.
3 foaming agent XHY-4 calibration experiment data of table
Table 4 and Fig. 2 give foaming agent solution initial concentration C0To its Adsorption experimental results on oil reservoir rock sand.Thus
Known to: initial concentration C0Have an impact to adsorbance, and adsorbance is small at low concentrations, as the concentration adsorbance that becomes larger becomes larger, but
It is instead in reduction trend more than no longer becoming larger after a certain concentration.When concentration is 0.20wt%, corresponding rock core absorption is maximum,
For 0.4028mg/g.When concentration is more than 0.20wt%, adsorption curve is obviously bent downwardly, i.e. adsorbance sharp fall.This
It is because there is a large amount of micella in the surfactant solution of high concentration, these micellas have the oil on rock forming mineral surface
There is solubilization, so that oil be dissolved out and feed them into liquid phase.In experiment after solution centrifugation, supernatant liquor is low in solution concentration
When be it is colourless, with the increase of solution concentration, supernatant liquor becomes faint yellow from colourless, eventually becomes brown color, this and suction
Attached isothermal decreasing trend is identical.
Influence of the 4 foaming agent initial concentration of table to adsorbance
The influence of embodiment three, oil-sand salinity to adsorbance
The foaming agent solution that two concentration of 0.08wt% and 0.03wt% is prepared with the simulated formation water of different salinities, into
Experiment of the row salinity as influence factor, other experiment conditions are constant.
The result shows that: salinity is not the principal element for influencing rock core and adsorbing to foaming agent XHY-4.Experimental result is shown in respectively
Table 5 and table 6, Fig. 3 are drawn according to this two tables data.
When 5 foaming agent XHY-4 effective concentration of table is 0.08wt%, influence of the salinity to foaming agent adsorbance
When 6 foaming agent XHY-4 effective concentration of table is 0.03wt%, influence of the salinity to foaming agent adsorbance
Although be described in detail to a specific embodiment of the invention in conjunction with the embodiments, should not be construed as to this
The restriction of the protection scope of patent.In range described by claims, those skilled in the art are without creative work
The various modifications and deformation that can make still belong to the protection scope of this patent.
Claims (5)
1. a kind of oil-sand is to the measuring method of foaming agent adsorbance, which comprises the following steps:
(1) determination of foaming agent solution blistering front and back concentration difference: taking initial concentration is C0Foaming agent solution VmL, with 500~
The rate stirring 20 of 1000rpm~for 24 hours, complete blistering；Again by oil-sand carrier immerse foam in, with oil-sand carrier base just with
Subject to the contact of foaming agent solution that bottom does not blister, 20~measure the concentration C of bottom foaming agent solution afterwards for 24 hours1, foaming agent solution
Blistering front and back concentration difference Cc=C0-C1；The oil-sand carrier is followed successively by polyester layer and red copper silk screen from top to bottom；
(2) oil-sand adsorbs: blistering by the method in step (1) to foaming agent solution, then will be placed with the oil of m g oil-sand
Sand carrier immerse foam in, oil-sand carrier base of being subject to just is contacted with the foaming agent solution that bottom does not blister, 20~for 24 hours after
Measure the concentration C of bottom foaming agent solution2；The ratio of the volume V of the quality m and foaming agent solution of oil-sand is 1:1~10 (g/mL)；
(3) adsorbance calculates: calculating oil-sand adsorbance P (mg/g) according to the data that step (1) and step (2) measure, adsorbance P
It calculates according to the following formula:
In formula, M is the molal weight of foaming agent.
2. measuring method according to claim 1, it is characterised in that: the solute of the foaming agent solution rises for XYH-4 type
Infusion, solvent are the water that salinity is 10000~170000mg/L；Its initial concentration C0For 0.03wt%~0.08wt%.
3. measuring method according to claim 1, it is characterised in that: C1And C2Passed through using benzyl chloride Soviet Union standard solution
Diphasic titration is measured.
4. measuring method according to claim 1, it is characterised in that: the quality m and foaming agent solution of oil-sand in step (2)
Volume V ratio be 1:4g/mL.
5. measuring method according to claim 1, it is characterised in that: the partial size of the oil-sand is 100~200 mesh.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1524921A (en) * | 2003-02-28 | 2004-09-01 | 中国石油天然气股份有限公司 | Foaming agent and acidic cross-linking foam breakdown fluid |
| CN102031103A (en) * | 2010-11-18 | 2011-04-27 | 陕西延长石油(集团)有限责任公司研究院 | Fracturing fluid system of CO2 cleaning foam |
| CN102478483A (en) * | 2010-11-22 | 2012-05-30 | 袁连海 | Foaming agent half life period determination method |
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2019
- 2019-01-23 CN CN201910061130.9A patent/CN109856329A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1524921A (en) * | 2003-02-28 | 2004-09-01 | 中国石油天然气股份有限公司 | Foaming agent and acidic cross-linking foam breakdown fluid |
| CN102031103A (en) * | 2010-11-18 | 2011-04-27 | 陕西延长石油(集团)有限责任公司研究院 | Fracturing fluid system of CO2 cleaning foam |
| CN102478483A (en) * | 2010-11-22 | 2012-05-30 | 袁连海 | Foaming agent half life period determination method |
Non-Patent Citations (2)
| Title |
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| 牛忠晓 等: "泡沫体系下起泡剂在河间东营油砂上的吸附", 《科学技术与工程》 * |
| 申乃敏: "华北高温油田泡沫驱提高采收率可行性研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
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Application publication date: 20190607 |