CN106771080B - Tight sand different existence state classification of crude oil extracts and scale new method - Google Patents
Tight sand different existence state classification of crude oil extracts and scale new method Download PDFInfo
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- CN106771080B CN106771080B CN201710022984.7A CN201710022984A CN106771080B CN 106771080 B CN106771080 B CN 106771080B CN 201710022984 A CN201710022984 A CN 201710022984A CN 106771080 B CN106771080 B CN 106771080B
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- crude oil
- hydro carbons
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; viscous liquids; paints; inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2823—Oils, i.e. hydrocarbon liquids raw oil, drilling fluid or polyphasic mixtures
Abstract
The invention discloses a kind of extraction of tight sand different existence state classification of crude oil and scale new methods, this method combination temperature and pressure fluid controls instrument for crude oil carries out classification extraction in free state in tight sand, closing state, physical absorption state, chemical adsorption states, carbonate cements and in feldspar quartz altogether, and has carried out precise calibration according to different phase light hydrocarbons extent of damage difference and content ratio is demarcated.Static observations and Dynamic Extraction have been carried out effective combination by this method, it ensure that each quasi-oil extracts the accurate errorless of content by visual observation and Temperature-pressure Conditions control, by free state, the practical geological conditions of oil reservoir is separated in conjunction with closing state crude oil for the first time, and physical absorption state and chemical adsorption states crude oil have been carried out accurate extraction for the first time and content is demarcated.Accurate extraction of this method for different existence state crude oil in tight sand ensure that the reliability for subsequently changing Parameter analysis.
Description
Technical field
The invention belongs to chemical technology fields, and in particular to a kind of tight sand different existence state classification of crude oil extract and
Scale new method.
Background technique
Fine and close oil refer to adsorb or free state preservation in oil source rock or with oil source rock alternating layers, adjacent fine and close sand
It is a kind of non-conventional oil money without the oil accumulation of extensive long-distance migration in the reservoir rocks such as rock, dense carbonate
Source.Compared with the low porosity and low permeability reservoir developed in the past, reservoiring mechanism is more complicated, pore throat is subtleer, chink content is higher, surveys
It is bigger to visit difficulty.After Bakken group fine and close oil in the oil field Elmcoulee of the basin Williston in 2008 realizes scale development,
The U.S. starts to pay much attention to fine and close exploration activity exploitation.2010, the fine and close oily producing well of United States was 2362 mouthfuls existing, individual well oil-producing
12t has added up oil-producing 3192 × 104T, it is contemplated that densification oil yield in the year two thousand twenty the whole America is up to 1.5 × 108t.Currently, China is causing
Have good beginning in terms of close exploration activity, fine and close oil is found in 5 basins, illustrates good Exploration Potential, wherein E Er
This more basin extension group take the lead in having built up the fine and close oily area of maturation of domestic first industrialized production, the cause of Sichuan Basin Jurassic system
It is more than ten thousand tons of oil well that close reservoir, which has 146 mouthfuls of cumulative productions, is that domestic reality takes over fine and close oil area.
Crude oil occurrence status multiplicity in tight sand, the effective extraction and class test evaluation pair of different existence state crude oil
Tight sand Hydrocarbon Accumulation mechanism study is formulated significant with development decision-making.Use in the prior art " sandstone substep is broken
There are many deficiencies for broken soxhlet extraction methods ".
Summary of the invention
It is extracted the purpose of the present invention is to provide a kind of tight sand different existence state classification of crude oil and scale is new
Method, this method combination temperature and pressure fluid control altogether instrument by free state in tight sand, closing state, physical absorption state, chemical adsorption states,
Crude oil carries out classification extraction in carbonate cements and in feldspar quartz mineral particle, and is lost according to different phase light hydrocarbons
Degree difference has carried out precise calibration and content ratio calibration.
Itself the specific technical proposal is:
Tight sand different existence state classification of crude oil extracts and scale new method, comprising the following steps:
Step 1, to by pretreated tight sand core column under normal temperature and pressure conditions with two that volume ratio is 93:7
Chloromethanes-methanol solvate soxhlet type obtains the free hydro carbons in the system of reservoir interconnected pore；
Step 2 by formation temperature of step 1 treated rock sample during crude oil development and is less than threshold pressure item
The methylene chloride-methanol solvent for being 93:7 with volume ratio under part is controlled in instrument altogether in temperature and pressure fluid and obtains the free hydro carbons of two classes；
Step 3 keeps the temperature sample and boosts, the methylene chloride-first for being 93:7 with volume ratio under the conditions of being greater than threshold pressure
Alcoholic solvent controls the physical absorption hydro carbons obtained in the following reservoir space of reservoir minimal flow pore throat radius in instrument in temperature and pressure fluid altogether；
Step 4 will complete the rock core cryogenic pulverization of step 3 to 1-2mm, the methylene chloride-methanol for being 93:7 with volume ratio
Solvent soxhlet type obtains the closing hydro carbons in the non-interconnected dead-end pore system of reservoir；
Step 5 continues cryogenic pulverization sample to individual particles, is observed with microscope, to control separation degree, is used at any time
The methylene chloride-methanol solvent soxhlet type that volume ratio is 93:7 obtains mineral surface chemistry and adsorbs hydro carbons；
Step 6 handles 6% hydrochloric acid solution of Within Monominerals sample of step 5 processing, and treated, and solution is extracted with solvent
It takes, obtains the hydro carbons in carbonate cements；
Step 7, acid treated sample distilled water flushing to neutrality, the dichloromethane for being 93:7 using volume ratio after dry
Alkane-methanol solvate soxhlet type obtains the remaining chemisorption hydro carbons of part mineral particle surface；
Step 8, with after rock sample of the potassium bichromate-concentrated sulfuric acid solution and dioxygen water process newly configured after step 7, use
Rock sample, without hydro carbons, is then 10: 1 in volume ratio to surface by the methylene chloride-methanol solvent soxhlet type that volume ratio is 93:7
Methylene chloride-methanol solvent in it is levigate and obtain inclusion hydrocarbon component in individual particles with soxhlet type, to this six kinds of hydrocarbon
After the completion of class extracting, Hydrocarbon type composition analysis is carried out respectively, and according to corresponding reservoir Crude Oil composition analysis as a result, carrying out lighter hydrocarbons school
Just, horizontal in light hydrocarbons composition characteristic according to the lighter hydrocarbons degree difference correction lost in this six kinds of hydro carbons extraction process, and count
Calculate six kinds of hydrocarbon content ratios.
Further, the size of tight sand core column described in step 1 is 25 × 25mm.
Compared with prior art, beneficial effects of the present invention:
Technical solution of the present invention combination temperature and pressure fluid controls instrument for free state, closing state, physical absorption in tight sand altogether
State, chemical adsorption states, crude oil carries out classification extraction in carbonate cements and in feldspar quartz, and light according to different phase crude oil
Hydrocarbon extent of damage difference has carried out precise calibration and content ratio calibration.This method is had static observations and Dynamic Extraction
Effect combines, and ensure that each quasi-oil extracts the accurate errorless of content by visual observation and Temperature-pressure Conditions control, for the first time will
Free state practical geological conditions of oil reservoir in conjunction with closing state crude oil is separated, for the first time by physical absorption state and chemical adsorption states
Crude oil has carried out accurate extraction and content calibration.Accurate extraction of this method for different existence state crude oil in tight sand,
It ensure that the reliability for subsequently changing Parameter analysis, compensate for and crude oil Filling process is only analyzed by hydrocarbon inclusion in mineral
Deficiency is analyzed the filling timing of different existence state crude oil (hydro carbons) in tight sand comprehensively and is contributed at hiding, and opens to be subsequent
The formulation of temperature and pressure parameter provides important references in hair measure.
Detailed description of the invention
Fig. 1 is that tight sand different existence state classification of crude oil of the present invention extracts and the process of scale new method is illustrated
Figure.
Specific embodiment
Technical solution of the present invention is described in more detail with specific embodiment with reference to the accompanying drawing.
Referring to Fig.1, the extraction of tight sand different existence state classification of crude oil and scale new method, including following step
It is rapid: 1. to use methylene chloride-methanol (body under normal temperature and pressure conditions to by pretreated tight sand core column (25 × 25mm)
Product than 93:7) solvent soxhlet type obtain reservoir interconnected pore system in free hydro carbons (abbreviation free hydrocarbon)；2. by above-mentioned
Formation temperature during crude oil development of treated rock sample and it is less than under the conditions of threshold pressure and uses methylene chloride-methanol (body
Product than 93:7) solvent temperature and pressure fluid controlled in instrument altogether obtain two classes dissociate hydro carbons；It boosts 3. being kept the temperature to sample, is being greater than boundary pressure
Acquisition reservoir minimal flow pore throat in instrument is controlled altogether in temperature and pressure fluid with methylene chloride-methanol (volume ratio 93:7) solvent under the conditions of power
Absorption hydro carbons (abbreviation physical absorption hydrocarbon) in the following reservoir space of radius；4. by the rock core cryogenic pulverization of complete process 3. to 1-
2mm obtains the closing in the non-interconnected dead-end pore system of reservoir with methylene chloride-methanol (volume ratio 93:7) solvent soxhlet type
Hydro carbons (referred to as closing hydrocarbon)；5. continuing cryogenic pulverization sample to individual particles (to be observed at any time with microscope, to control separation journey
Degree), mineral surfaces, which are obtained, with methylene chloride-methanol (volume ratio 93:7) solvent soxhlet type adsorbs hydro carbons (abbreviation chemisorption
Hydrocarbon)；6. handling 5. 6% hydrochloric acid solution of Within Monominerals sample that step is handled, solution solvent extraction that treated is obtained
Hydro carbons (abbreviation cement hydrocarbon) in calcite cement；7. acid treated sample distilled water flushing is to neutrality, after dry
The remaining chemisorption hydrocarbon of part mineral particle surface is obtained using methylene chloride-methanol (volume ratio 93:7) solvent soxhlet type
Class；8. using dichloromethane after rock sample of the potassium bichromate-concentrated sulfuric acid solution and dioxygen water process newly configured after 7. step
Alkane-methanol (volume ratio 93: 7) solvent soxhlet type is to surface without hydro carbons.Then by rock sample in methylene chloride-methanol (volume ratio
10: 1) levigate in solvent and obtain inclusion hydrocarbon component in individual particles (abbreviation inclusion hydrocarbon) with soxhlet type.To this six
After the completion of kind hydrocarbon extraction, Hydrocarbon type composition analysis is carried out respectively, and according to corresponding reservoir Crude Oil composition analysis as a result, carrying out light
Hydrocarbon correction, it is horizontal in light hydrocarbons composition characteristic according to the lighter hydrocarbons degree difference correction lost in this six kinds of hydro carbons extraction process,
And calculate six kinds of hydrocarbon content ratios.
The foregoing is only a preferred embodiment of the present invention, the scope of protection of the present invention is not limited to this, it is any ripe
Know those skilled in the art within the technical scope of the present disclosure, the letter for the technical solution that can be become apparent to
Altered or equivalence replacement are fallen within the protection scope of the present invention.
Claims (2)
1. a kind of tight sand different existence state classification of crude oil extracts and scale new method, which is characterized in that including with
Lower step:
Step 1, the dichloromethane for being under normal temperature and pressure conditions 93:7 with volume ratio to the pretreated tight sand core column of process
Alkane-methanol solvate soxhlet type obtains the free hydro carbons in the system of reservoir interconnected pore；
Step 2 by formation temperature of step 1 treated rock sample during crude oil development and is less than under the conditions of threshold pressure
The methylene chloride-methanol solvent for being 93:7 with volume ratio is controlled in instrument altogether in temperature and pressure fluid and obtains the free hydro carbons of two classes；
Step 3 keeps the temperature sample and boosts, and the methylene chloride-methanol for being 93:7 with volume ratio under the conditions of being greater than threshold pressure is molten
The physical absorption hydro carbons obtained in the following reservoir space of reservoir minimal flow pore throat radius in instrument is controlled in agent in temperature and pressure fluid altogether；
Step 4 will complete the rock core cryogenic pulverization of step 3 to 1-2mm, the methylene chloride-methanol solvent for being 93:7 with volume ratio
Soxhlet type obtains the closing hydro carbons in the non-interconnected dead-end pore system of reservoir；
Step 5 continues cryogenic pulverization sample to individual particles, is observed at any time with microscope, to control separation degree, uses volume
Mineral surface chemistry, which is obtained, than the methylene chloride-methanol solvent soxhlet type for 93:7 adsorbs hydro carbons；
Step 6 is handled 6% hydrochloric acid solution of Within Monominerals sample of step 5 processing, solution solvent extraction that treated,
Obtain the hydro carbons in carbonate cements；
Step 7, acid treated sample distilled water flushing to neutrality, the methylene chloride-for being 93:7 using volume ratio after dry
Methanol solvate soxhlet type obtains the remaining chemisorption hydro carbons of part mineral particle surface；
Step 8, with after rock sample of the potassium bichromate-concentrated sulfuric acid solution and dioxygen water process newly configured after step 7, use volume
Than the methylene chloride-methanol solvent soxhlet type for 93:7 to surface without hydro carbons, then by rock sample in two that volume ratio is 10: 1
It is levigate and obtain inclusion hydrocarbon component in individual particles with soxhlet type in chloromethanes-methanol solvate, it is taken out to this seven kinds of hydro carbons
After the completion of mentioning, Hydrocarbon type composition analysis is carried out respectively, and according to corresponding reservoir Crude Oil composition analysis as a result, carry out lighter hydrocarbons correction,
It is horizontal in light hydrocarbons composition characteristic according to the lighter hydrocarbons degree difference correction lost in this seven kinds of hydro carbons extraction process, and calculate
Seven kinds of hydrocarbon content ratios.
2. tight sand different existence state classification of crude oil according to claim 1 extracts and scale new method,
It is characterized in that, the size of tight sand core column described in step 1 is 25 × 25mm.
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| CN110058000B (en) * | 2018-01-15 | 2022-03-01 | 中国石油天然气股份有限公司 | Method and device for obtaining volume coefficient of crude oil |
| CN108982286B (en) * | 2018-08-28 | 2021-09-03 | 同济大学 | Separation and quantification method for soluble organic matters in different occurrence states in shale |
| CN111577265B (en) * | 2020-02-17 | 2023-08-01 | 中国石油化工股份有限公司 | Method for quantitatively restoring reservoir fluid filling process |
| CN113740454A (en) * | 2021-09-02 | 2021-12-03 | 中国石油大学(北京) | Pre-treatment method for analyzing primitiveness of precambrian biomarker compound |
| CN117949548A (en) * | 2022-10-19 | 2024-04-30 | 中国石油天然气股份有限公司 | Shale oil occurrence evaluation method and shale oil geological recoverable reserve evaluation method |
Citations (1)
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| CN101788410A (en) * | 2010-02-10 | 2010-07-28 | 中国石油天然气股份有限公司 | Method for extracting oil sample inside hydrocarbon inclusion in groups |
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| CN101788410A (en) * | 2010-02-10 | 2010-07-28 | 中国石油天然气股份有限公司 | Method for extracting oil sample inside hydrocarbon inclusion in groups |
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| Molecular correlation of free oil and inclusion oil of reservoir rocks in the Junggar Basin, China;Changchun Pan等;《Organic Geochemistry》;20031231;第34卷;全文 * |
| 不同赋存状态轻烃的分析技术及石油地质意义;李广之等;《天然气地球科学》;20070228;第18卷(第1期);全文 * |
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