CN104422670B - A kind of authentication method of microsize grade volcanic ash tuff - Google Patents
A kind of authentication method of microsize grade volcanic ash tuff Download PDFInfo
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- CN104422670B CN104422670B CN201310389139.5A CN201310389139A CN104422670B CN 104422670 B CN104422670 B CN 104422670B CN 201310389139 A CN201310389139 A CN 201310389139A CN 104422670 B CN104422670 B CN 104422670B
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Abstract
A kind of authentication method of microsize grade volcanic ash tuff, belongs to rock cultivar identification technical field.In the ken that the petrographic thin section of clastic rock rock sample is located to orthogonal polarizing microscope, choose 5 times of object lens, turn left and rotate 45 degree of objective table, mineral to be measured are placed in two in microscope ocular, four-quadrant, insert gypsum plate, the interference colours of the two, mineral to be measured of four-quadrant are determined for the greyish white interference colours of one-level, two, the greyish white interference colours x1 of one-level of four-quadrant mineral to be measured percentage composition in the visual estimation ken；Objective table is turn 90 degrees to the right, mineral to be measured is placed in one in microscope ocular, three quadrants；The interference colours for determining one, three quadrant mineral to be measured are the greyish white interference colours of one-level；The greyish white interference colours x2 of one-level of one, three quadrant mineral to be measured percentage composition in the visual estimation ken；If x1 and x2 interference colours are the greyish white interference colours of one-level, and x1=x2>When 50%, the clastic rock rock sample is microsize grade volcanic ash tuff.
Description
Technical field
The present invention relates to rock cultivar identification technical field, more particularly to one kind under petrographic microscope quickly and accurately
The method for identifying microsize grade volcanic ash tuff.
Background technology
The authentication method for the microsize grade volcanic ash tuff that the country is used is natural with People's Republic of China's oil at present
Gas professional standard SY/T5368--2000《Petrographic thin section is identified》Based on carry out.
The shortcoming of this method is that identification microsize grade volcanic ash tuff and argillaceous rocks are difficult to distinguish.Due to composition microsize grade
The clay mineral chip of chip and composition mud stone in volcanic ash tuff is all very thin, and particle diameter is respectively less than 0.0313mm, in polarisation
It is distributed under microscope into aggregate, each monomer is tip-like.The form of single Separate Fine-grained Minerals is cannot be distinguished by all and is done
Color is related to, therefore is difficult to distinguish microsize grade volcanic ash tuff and mud stone, rock identification error is easily caused.
Lithology is to evaluate the basis of electrical reservoir, oiliness and physical property relation.
If lithology is qualitative inaccurate, the property of whole reservoir can not just be discussed, can not also determine lithology, electricity
Relation between property, oiliness and physical property, so that, have a strong impact on the discovery in petroleum exploration and development oil searching direction and new oil field.
The content of the invention
In order to solve the above problems, the present invention proposes one kind and quickly and accurately identifies micro- under orthogonal polarizing microscope
The method of grade volcanic ash tuff.
A kind of authentication method of microsize grade volcanic ash tuff, it is characterised in that using following steps identification microsize grade fire
The method of mountain dirt tufa stone, the step includes：
Step 1, by the petrographic thin section of clastic rock rock sample be located at orthogonal polarizing microscope the ken in；
Step 2,5 times of object lens of selection；
Step 3, objective table is turned left 45 degree, mineral to be measured are placed in two in microscope ocular, four-quadrant；
Step 4, plug gypsum plate；
Step 5, measure two, the mineral x1 to be measured of four-quadrant interference colours are the greyish white interference colours of one-level；
The percentage composition of two, the four-quadrant mineral x1 to be measured greyish white interference colours of one-level in step 6, the visual estimation ken；
Step 7, objective table turn 90 degrees to the right, mineral to be measured are placed in one in microscope ocular, three quadrants；
Step 8, one, three quadrants of measure mineral x2 to be measured interference colours are the greyish white interference colours of one-level；
The percentage composition of one, the three quadrants mineral x2 to be measured greyish white interference colours of one-level in step 9, the visual estimation ken；
If the interference colours of step 10, x1 and x2 are the greyish white interference colours of one-level, and x1=x2>When 50%, the clastic rock rock
Sample is microsize grade volcanic ash tuff；
Percentage composition in method is entirely area percentage composition.
The beneficial effect of the authentication method for the microsize grade volcanic ash tuff that the present invention is provided is：
Because the mineral of countless composition volcanic ash tuffs and the nanoclay mineral of countless composition argillaceous rocks are inclined
It is distributed under light microscope into aggregate, each Separate Fine-grained Minerals cannot be distinguished by single Separate Fine-grained Minerals at all in a tip-like
Form and interference colours.Easily obscure, easily cause lithology identification error.Argillaceous rocks belongs to parent rocks and carries the normal sedimentation of coming
Rock, and volcanic ash tuff is the pyroclastic rock that volcanic eruption is fallen down from volcanic crater.Precise Identification volcanic ash tuff is outstanding
To be important.
The present invention can it is accurately quick, identify microsize grade volcanic ash tuff.It is accurate to judge rock class, particularly with accurate
This kind of problem of volcanic ash tuff that parent rock is carried and next normal sedimentation thing or volcanic eruption fall down from volcanic crater is distinguished,
Accurate distinguishing rule is provided.Lithology is the basis of petroleum geology research, and lithology is fixed, for whole petroleum reservoir property and four property
Relation（Lithology, electrical, oiliness and physical property）Key effect is played, whole oil prospecting and the discovery in new oil field are provided and correctly referred to
Lead direction.
The advantage for the authentication method that the present invention is provided is：Operating method is simple, can accurately and rapidly identify particulate
Level volcanic ash tuff, can provide accurate foundation, with reality for the discovery in petroleum exploration and development oil searching direction and new oil field
With value.
Embodiment
In order to understand the present invention in depth, with reference to specific embodiment, the present invention is described in detail.
Rock sample using accurate eastern 1450.38 meters of Huo Shao Shan Oil-Field H065 wells flat-bottomed water gate (P2p) is sample, using following steps
Microsize grade volcanic ash tuff in the petrographic thin section is identified, specific steps include：
1st, the petrographic thin section of clastic rock rock sample is located in the ken of orthogonal polarizing microscope；
2nd, 5 times of object lens are chosen；
3rd, objective table is turned left 45 degree, mineral to be measured is placed in two in microscope ocular, four-quadrant；
4th, gypsum plate is plugged；
5th, the interference colours for determining two, the mineral x1 to be measured of four-quadrant are the greyish white interference colours of one-level；
6th, in the visual estimation ken two, the four-quadrant mineral x1 to be measured greyish white interference colours of one-level percentage composition, x1=98%；
7th, objective table is turn 90 degrees to the right, mineral to be measured is placed in one in microscope ocular, three quadrants；
8th, the interference colours for determining one, three quadrants mineral x2 to be measured are the greyish white interference colours of one-level；
9th, in the visual estimation ken the greyish white interference colours x2 of one-level of one, three quadrant mineral to be measured percentage composition, x2=98%；
10th, above-mentioned x1 and x2 interference colours are the greyish white interference colours of one-level, and x1=x2=98%, in x1=x2>50% scope
Interior, therefore, the rock sample of quasi- 1450.38 meters of east Huo Shao Shan Oil-Field H065 wells flat-bottomed water gate (P2p) is microsize grade volcanic ash tuff.
Microsize grade volcanic ash tuff is to belong to pyroclastic rock.Pyroclastic rock is the detrital buildups by volcano eruption
Afterwards by formed by the diagenesis such as consolidation or clinkering.
Mud stone is to belong to terrigenous clastic deposit.The authentication method for the microsize grade volcanic ash tuff that the present invention is provided is combined
Above-mentioned theory can identify microsize grade volcanic ash tuff, can be petroleum exploration and development oil searching direction and the hair in new oil field
Foundation is now provided, with practical value.
Above-described embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not limited to this hair
Bright, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc. should be included in the present invention
Protection domain within.
Claims (1)
1. a kind of authentication method of microsize grade volcanic ash tuff, it is characterised in that step includes：
Step 1, by the petrographic thin section of clastic rock rock sample be located at orthogonal polarizing microscope the ken in；
Step 2,5 times of object lens of selection；
Step 3, objective table is turned left 45 degree, mineral to be measured are placed in two in microscope ocular, four-quadrant；
Step 4, plug gypsum plate；
Step 5, measure two, the mineral x1 to be measured of four-quadrant interference colours are the greyish white interference colours of one-level；
The percentage composition of two, the four-quadrant mineral x1 to be measured greyish white interference colours of one-level in step 6, the visual estimation ken；
Step 7, objective table turn 90 degrees to the right, mineral to be measured are placed in one in microscope ocular, three quadrants；
Step 8, one, three quadrants of measure mineral x2 to be measured interference colours are the greyish white interference colours of one-level；
The percentage composition of one, the three quadrants mineral x2 to be measured greyish white interference colours of one-level in step 9, the visual estimation ken；
If the interference colours of step 10, x1 and x2 are the greyish white interference colours of one-level, and x1=x2>When 50%, the clastic rock rock sample is
Microsize grade volcanic ash tuff；
Percentage composition in method is entirely area percentage composition.
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| CN201310389139.5A CN104422670B (en) | 2013-08-30 | 2013-08-30 | A kind of authentication method of microsize grade volcanic ash tuff |
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| CN201310389139.5A CN104422670B (en) | 2013-08-30 | 2013-08-30 | A kind of authentication method of microsize grade volcanic ash tuff |
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| CN104422670A CN104422670A (en) | 2015-03-18 |
| CN104422670B true CN104422670B (en) | 2017-10-17 |
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| CN111189830B (en) * | 2020-01-19 | 2022-08-19 | 山东省地质矿产勘查开发局第一地质大队 | Identification method of neutral volcanic rock-andesite |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101424600A (en) * | 2007-11-01 | 2009-05-06 | 中国石油天然气股份有限公司 | Method for making high smectite sandstone casting slice |
| CN102346130A (en) * | 2010-08-05 | 2012-02-08 | 中国石油天然气股份有限公司 | Method for identifying clay in micro-deposit (rock) |
| CN102346139A (en) * | 2010-08-05 | 2012-02-08 | 中国石油天然气股份有限公司 | Identification method of andesine in fine settlement (sedimentary rock) |
| CN102507582A (en) * | 2011-10-24 | 2012-06-20 | 中国石油天然气股份有限公司 | Identification method for feldspar crystallinoclastic tuff |
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2013
- 2013-08-30 CN CN201310389139.5A patent/CN104422670B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101424600A (en) * | 2007-11-01 | 2009-05-06 | 中国石油天然气股份有限公司 | Method for making high smectite sandstone casting slice |
| CN102346130A (en) * | 2010-08-05 | 2012-02-08 | 中国石油天然气股份有限公司 | Method for identifying clay in micro-deposit (rock) |
| CN102346139A (en) * | 2010-08-05 | 2012-02-08 | 中国石油天然气股份有限公司 | Identification method of andesine in fine settlement (sedimentary rock) |
| CN102507582A (en) * | 2011-10-24 | 2012-06-20 | 中国石油天然气股份有限公司 | Identification method for feldspar crystallinoclastic tuff |
Non-Patent Citations (1)
| Title |
|---|
| 《微细沉积物中黏土矿物鉴定新方法》;张丽霞等;《新疆石油地质》;20120831;第33卷(第4期);第491-492页 * |
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