CN101424600B - Method for making high smectite sandstone casting slice - Google Patents
Method for making high smectite sandstone casting slice Download PDFInfo
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- CN101424600B CN101424600B CN2007101766836A CN200710176683A CN101424600B CN 101424600 B CN101424600 B CN 101424600B CN 2007101766836 A CN2007101766836 A CN 2007101766836A CN 200710176683 A CN200710176683 A CN 200710176683A CN 101424600 B CN101424600 B CN 101424600B
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Abstract
The invention relates to a method for preparing casting body slices of high steatite sandstone. Firstly, high steatite sandstone samples without containing oil are selected, are drilled by saturated brine into cylindrical or cubic samples without containing oil, and are cut into sandstone samples of 25mm*25mm*25mm, and the sandstone samples are eluted for removing oil and aired at a normal temperature. In a normal temperature state, in a vacuum oven, negative pressure is continuously kept at -0.08MPa, and the sandstone samples are dried in vacuum for 48 hours so that toluene and water molecules are drawn out by the negative pressure, die casting is carried out to the sandstone samples by a blowhole casting body instrument at the normal temperature, die-casting liquid of epoxy resin, a 593curing agent and a pigment in the mass ratio of 100 : 35 : 1 is poured in the conditions that die-casting time is 1 hour, pressure is 30MPa, and a vacuum value is greater than 8*10 <-2> torr. After the die casting, the casting body is ground into slices without cooking glue. The invention truly reflects blowhole structure parameters in strata and takes important effect on the right judgment of the quality of a reservoir property.
Description
Technical field:
The present invention relates to a kind of flaking method of high smectite class clay mineral casting body flake.
Background technology:
The casting body flake flaking method of present domestic employing is to be background technology with the general rock flaking method in the oil and gas industry standard SY/T 5913-2004 of the People's Republic of China (PRC) rock flaking method.Be to carry out film-making by standard at general rock.
The shortcoming of this flaking method is during the casting body flake rock sample body of casting, to use body of casting instrument to carry out the rock sample hole epoxy resin body of casting.Whatsoever rock sample all needs temperature during the body of casting, and the such clay mineral of image height smectite is met water, heats dehydration to expand, and destroys pore texture.Hole, venturi and microfracture have artificially been increased.The face rate of hole is artificially enlarged.What reflect is not hole real in the stratum.
Summary of the invention:
The objective of the invention is to work out a kind of preparation method of casting body flake, go to proofread and correct with the measured pore texture data of general flaking method, obtain the true parameter of pore structure in stratum at last with the measured pore texture data of casting body flake that this method is made.
The flaking method of high smectite sandstone casting body flake of the present invention:
(1) at first chooses high smectite sandstone and do not contain oil samples with the core description data;
(2) will be defined as not the high smectite sample of sandstone of oil-containing drills through by People's Republic of China's oil and gas industry standard SY/T 5336-1996 rock core conventional method of analysis standard with saturated brine and is shaped as the cylindrical or cuboidal oil samples that do not contain, after the sampling, cut the rock sample of 25mm * 25mm * 5mm;
(3) with the rock sample that cuts with toluene washing oil at normal temperatures, airing;
(4) in vacuum drying oven, under the normal temperature state, keep negative pressure continuously about-0.08MPa, dry vacuum 48 hours is released toluene in the rock and hydrone by negative pressure;
(5) with the blowhole body of casting instrument die casting at normal temperatures of dry rock sample, die casting liquid is pressed 100 parts of epoxy resin: 35 parts in 593 hardening agent: the mass ratio that pigment is 1 part injects, and the die casting time is 1 hour, and pressure is 30MPa, vacuum tightness value 〉=8 * 10
-2Torr;
(6) after die casting finishes, by People's Republic of China's oil and gas industry standard, SY/T5913-1994, the rock flaking method grinds the body of casting under the situation of not boiling glue in blocks.
The effect of invention
The present invention has avoided existing the characteristics of artificial destruction rock texture, truly reflects the parameter of pore structure in the stratum.Proofread and correct the parameter of pore structure that flaking method is routinely measured with not containing measured data of slice, thin piece that oil samples makes, avoided data to have manifestation of dishonesty.To the quality of correct judgement reservoir quality, the exploration oil prospecting is played an important role.
Embodiment
Embodiment 1-5
Burn room ditch group at B701 well and B703 well, do not contain well section and chosen 5 samples, with the piece sample respectively by the washing oil the inventive method of not heating) and the washing oil of heating (conventional method) do parameter of pore structure (face rate etc.) respectively.
High smectite sandstone casting body flake flaking method processing step is as follows:
1 sampling
1.1 the preliminary work before the sampling
Describe according to core, judge sample earlier and be not oil-bearing sand.
1.2. sampling
Require: must get not oil-bearing sand.It is exactly for the washing oil of not heating that this method choosing does not contain the oil samples purpose.General all mensuration factor of porosity, the isoparametric oil-containing rock sample of permeability must washing oil before measuring.
2 do not contain the sampling of oil samples
Available diamond coring crown and saw blade are cut into rock core drill cylindrical or cube.Get the small column sample, general diameter is 2.5cm or 3.8cm, and minimum length is 1 with the diameter ratio.
During boring sample, be noted that especially: what shale index was high must drill through with saturated brine.
2.1 the sampling of body of casting sample
Get 25mm * 25mm * two samples of 5mm (the method washing oil of not heating with invention comes the die casting film-making, and another piece is heated behind the washing oil, and flaking method die casting film-making is stand-by routinely).
2.2 on every rock sample, indicate pound sign, rock sample number with burnt black ink.
3 washing oil of not heating
Washing oil method: get 25mm * 25mm * sample of 5mm and be put in the flask, toluene solvant is annotated 2/3 place of people to flask, rock sample is put in people's exhausting cabinet, the sealing bottleneck.Soak not oil-bearing sand sample with toluene, changed once new toluene in one day, change two to three times, during the toluene water white transparency till.
The sample of washing oil 3.1 will not heat, cool last one day.
3.2 sample drying
Use boulton process, its method is: in vacuum drying oven, under the normal temperature state, keep negative pressure continuously about-0.08MPa, dry vacuum 48 hours.Purpose is by negative pressure toluene in the rock and hydrone to be released, and does not destroy the structure of clay mineral itself again.
Put into exsiccator 3.3 will vacuumize dry good sample.
3.4 preparation die casting liquid
By following prescription, (injectant 100: hardening agent 35: the preparation mass ratio of pigment 1) fully stirs evenly under the normal temperature now to prepare die casting liquid.Injectant is a low viscosity epoxy resin, and hardening agent is 593 hardening agent, and pigment is transparent indigo plant.
4 die casting
Use JS-3 type blowhole body of casting instrument, carry out the rock sample hole epoxy resin body of casting
Contain in the sample test tube 4.1 rock sample packed in order, again test tube is put into vacuum system, and tighten rubber plug, close the vacuum liquid-absorbing valve.
4.2 set the working time of this die casting is 1 hour (the panel closed condition is fixed time).
4.3 power supply on the connection panel.
4.4 open total power switch and vacuum power switch on the instrument panel, to find time 1 hour, the vacuum tightness value is not less than 8 * 10
-2Torr.
4.5 will fully stir evenly under the 3.4 die casting liquid normal temperature that configure.
4.6 open liquid sucting valve, die casting liquid is sucked in the test tube automatically, die casting liquid liquid level will exceed more than the rock sample 3cm, finds time 15 minutes again.
4.7 close the vacuum power switch, open the logical atmosphere of liquid sucting valve.
Contain the sample test tube 4.8 take out, put into a new test tube simultaneously, and clean liquid sucting valve with ethanol.
5 open hyperbaric chamber nut and loam cake, and put into and contain the sample test tube.
5.1 open pressurizing valve and bleed-off valve, open the oil pump power switch, make oil rise to certain position, close the oil pump power switch.
5.2 cover top cover, jam nut and dead stifled closes bleed-off valve.
Close pressurizing valve 5.3 open after the oil pump power supply makes pressure rise to 30MPa, and lift and compress again after unloading depression bar on the oil pump.
6. close the temperature-controlled power switch, normal temperature die casting.
7 film-makings
After die casting finishes, again by People's Republic of China's oil and gas industry standard, SY/T5913-1994, the rock flaking method grinds body of casting sheet, but does not boil glue.
8, rock sample that step 2.1 is standby, according to conventional rerum natura, after the method for the washing oil of heating, the baking sample of heating is handled, die casting according to a conventional method, film-making again.
9, two thin slices at the same position that two kinds of methods are made carry out the parameter of pore structure contrast, as: the face rate.Find out difference and identical point.How many real face rates in quantification directly perceived explanation stratum is and finds out the reason that causes false data.
In order to study high smectite sandstone dehydration reservoir quality there are much influences.Get high smectite sandstone real face rate in the stratum clear what are.Die casting film-making new method and conventional body of casting flaking method with invention have carried out the problem experiment.Data see Table 1.
Room ditch group the heat face rate parameter comparison of washing oil die casting film-making of washing oil die casting film-making (the present invention) and routine of not heating is burnt in northern 80 wellblocks of table 1
| Pound sign | Well depth | Layer position | Factor of porosity % | Permeability * 10 -3 μm 2 | The face rate | Smectite % | Ferroan calcite % | Remarks | Factor of porosity % | Permeability * 10 -3 μm 2 | Face rate % | Smectite % | Ferroan calcite % | Remarks |
| B703 | 2088.1 | T1s | 19.7 | 5.06 | There are not 2 of the hole of showing seams | 20 | Washing oil is heated | 9.811 | (3.48 the crack is arranged) | There is not 1 of the hole of showing seam | 20 | The washing oil of not heating | ||
| B703 | 2106.9 | T1s | There is not 1 of the hole of showing seam | 20 | Washing oil is heated | It is seamless not have the hole of showing | 20 | The washing oil of not heating |
| Pound sign | Well depth | Layer position | Factor of porosity % | Permeability * 10 -3 μm 2 | The face rate | Smectite % | Ferroan calcite % | Remarks | Factor of porosity % | Permeability * 10 -3 μm 2 | Face rate % | Smectite % | Ferroan calcite % | Remarks |
| B703 | 2122.8 | T1s | 22.1 | 12.2 | It is seamless not have the hole of showing | 20 | Washing oil is heated | 18.36 | 7.78 | It is seamless not have the hole of showing | 20 | The washing oil of not heating | ||
| B701 | 2237.9 | T1s | 13.8 | 0.142 | It is seamless not have the hole of showing | 30 | Washing oil is heated | 7.44 | 0.06 | It is seamless not have the hole of showing | 30 | The washing oil of not heating | ||
| B701 | 2230.9 | T1s | 17.9 | 2.36 | There are not 6 of the hole of showing seams | 15 | Washing oil is heated | 13.45 | 1 | It is seamless not have the hole of showing | 15 | The washing oil of not heating |
Observe down by the mirror to 5 block casting body thin slices, there is not apparent hole in the sample face rate of the new method of invention (washing oil of not heating) die casting film-making, does not have microfracture yet.The sheet of die casting system behind the washing oil but out-of-date methods are heated, the face rate does not have apparent hole yet, but that microfracture has increased is many, and microfracture is all arranged on the every sample, and maximum microfractures has increased by 6 (seeing Table 1).
The thin slice that the washing oil die casting of heating is routinely made is described, bigger to the inner structure destruction of smectite clay mineral, cause the distortion of data.The reason that causes data distortion is to heat to have caused a lot of microfractures.
Make sheet data of coming and the thin slice that the conventional washing oil die casting of heating of correction is made with the inventive method die casting and measure next data contrast.The one, illustrated that intuitively the washing oil of heating, baking sample have destruction really to the structure of high smectite sandstone.The 2nd, with data-measuring the washing oil of heating, the structure of high smectite sandstone is destroyed on earth is what to the baking sample, how much quantity is.Find high smectite sandstone real face rate value in the stratum.
Claims (1)
1. the flaking method of one kind high smectite sandstone casting body flake is characterized in that:
(1) at first chooses high smectite sandstone and do not contain oil samples with the core description data;
(2) with diamond coring crown and saw blade high smectite sandstone not the sample drilling of oil-containing become cylindrical or cube, during boring sample, be noted that especially: what shale index was high must drill through with saturated brine, after the sampling, cuts the rock sample of 25mm * 25mm * 5mm;
(3) with the rock sample that cuts with toluene washing oil at normal temperatures, airing;
(4) in vacuum drying oven, under the normal temperature state, keep negative pressure continuously at-0.08MPa, dry vacuum 48 hours is released toluene in the rock sample and hydrone by negative pressure;
(5) with the blowhole body of casting instrument die casting at normal temperatures of dry rock sample, die casting liquid is pressed 100 parts of epoxy resin: 35 parts in 593 hardening agent: the mass ratio that pigment is 1 part injects, and the die casting time is 1 hour, and pressure is 30MPa, vacuum tightness value 〉=8 * 10
-2Holder;
(6) after die casting finishes, by People's Republic of China's oil and gas industry standard, SY/T5913-1994, the rock flaking method grinds the body of casting under the situation of not boiling glue in blocks.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101766836A CN101424600B (en) | 2007-11-01 | 2007-11-01 | Method for making high smectite sandstone casting slice |
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| CN2007101766836A CN101424600B (en) | 2007-11-01 | 2007-11-01 | Method for making high smectite sandstone casting slice |
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| CN101424600A CN101424600A (en) | 2009-05-06 |
| CN101424600B true CN101424600B (en) | 2010-09-01 |
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| CN102758621B (en) * | 2011-04-28 | 2015-05-13 | 中国石油天然气集团公司 | Preparation method for density logger graduation high density value standard die block |
| CN104212124A (en) * | 2013-06-05 | 2014-12-17 | 中国石油天然气股份有限公司 | Cementing agent for preparation of geological rock slice |
| CN104422670B (en) * | 2013-08-30 | 2017-10-17 | 中国石油天然气股份有限公司 | A kind of authentication method of microsize grade volcanic ash tuff |
| CN104422692B (en) * | 2013-08-30 | 2017-10-17 | 中国石油天然气股份有限公司 | A kind of authentication method of microsize grade volcanic dust tufaceous mud stone |
| CN106153413B (en) * | 2015-04-23 | 2019-08-02 | 中国石油天然气股份有限公司 | Carbonate rock detritus microscopic void molding method |
| CN104833562A (en) * | 2015-05-08 | 2015-08-12 | 成都理工大学 | Rapid manufacturing method for rock casting body slice |
| CN110715887B (en) * | 2018-07-12 | 2022-07-15 | 中国石油化工股份有限公司 | Method for measuring porosity of bituminous sand |
| CN108956423A (en) * | 2018-07-19 | 2018-12-07 | 中国石油大学(华东) | Determine rock two dimension porosity-three-dimensional apertures porosity quantitative relationship method |
| CN111829842B (en) * | 2019-04-18 | 2023-05-26 | 中国石油天然气股份有限公司 | Rock sample rack and rock pouring method for cast body |
| CN111157310A (en) * | 2019-12-31 | 2020-05-15 | 中国石油天然气股份有限公司 | Rock casting body slice die-casting preparation method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2906587Y (en) * | 2006-04-03 | 2007-05-30 | 大庆油田有限责任公司 | Quick rock core oil washing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2906587Y (en) * | 2006-04-03 | 2007-05-30 | 大庆油田有限责任公司 | Quick rock core oil washing device |
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