CN102507582A - Identification method for feldspar crystallinoclastic tuff - Google Patents
Identification method for feldspar crystallinoclastic tuff Download PDFInfo
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- CN102507582A CN102507582A CN2011103249332A CN201110324933A CN102507582A CN 102507582 A CN102507582 A CN 102507582A CN 2011103249332 A CN2011103249332 A CN 2011103249332A CN 201110324933 A CN201110324933 A CN 201110324933A CN 102507582 A CN102507582 A CN 102507582A
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- feldspar
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- tuff
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Abstract
The invention discloses an identification method for feldspar crystallinoclastic tuff, belonging to the technical field of the identification of variety of rocks. The identification method comprises the following steps of: making a rock slice from clastic rock; selecting and using a low-power objective lens to carry out primary measurement on the rock slice; selecting and using a high-power objective lens to carry out further accurate measurement on the rock slice; obtaining a ratio x between the area percentage of feldspar in the rock slice and the area percentage of quartz in the rock slice according to the result of the accurate measurement; and obtaining an identification conclusion according to the size of the value of the x. The method can provide a foundation for the oil detection direction in the exploration and the development of petroleum and the discovery of new oilfields and has practical values.
Description
Technical field
The present invention relates to rock cultivar identification technical field, particularly a kind of method of under polarizing microscope, identifying the feldspar crystal tuff quickly and accurately.
Background technology
Lithology be estimate reservoir electrically, the basis of oiliness and rerum natura relation.
Because forming the chip of feldspar crystal tuff is main with feldspar all with the chip of forming arkosic arenite, therefore, be difficult to feldspar crystal tuff and arkosic arenite are distinguished, cause rock to identify easily and make mistakes.
If lithology is qualitative inaccurate, just can't discuss to the character of whole reservoir, also can't determine lithology, electrically, the relation between oiliness and the rerum natura, thereby, have a strong impact on the discovery of petroleum exploration and development oil prospecting direction and find.
Summary of the invention
In order to address the above problem, the present invention proposes a kind of method of under orthogonal polarizing microscope, identifying the feldspar crystal tuff quickly and accurately.
The authentication method of feldspar crystal tuff provided by the invention comprises:
Produce the petrographic thin section of petroclastic rock;
Select low power objective for use, said petrographic thin section is carried out preliminary survey;
Select high power objective for use, said petrographic thin section is carried out further accurate measurement;
Draw the area percentage composition of said petrographic thin section andesine and the ratio x of the area percentage composition of quartz according to said accurate measurement result;
Size according to the x value draws expert's conclusion.
As preferably, said preliminary survey can draw under the low power objective condition, in the FOV, and the ratio a of the area of feldspar and quartzy area.
As preferably, said accurate measurement can draw under the high power objective condition, in the FOV, and the ratio x of the area of feldspar and quartzy area.
As preferably, the degree of accuracy of said ratio x is higher than the degree of accuracy of said ratio a.
As preferably, when x＞5, the rock that said petrographic thin section is corresponding is the feldspar crystal tuff.
The beneficial effect of the authentication method of feldspar crystal tuff provided by the invention is:
Feldspar in the feldspar crystal tuff is a feldspar mineral crystal chip, the pyroclastic tephra that this feldspar mineral crystal chip falls down from the crater when being volcanic eruption, and mineralogical composition is more single.
Feldspar in the arkosic arenite is the mineral chip in the petroclastic rock; Mineral chip in this petroclastic rock is the normal deposition fragmental products that comes from the parent rock carrying; Except that feldspar, also be mixed with other mineral chips such as quartzy and landwaste in the mineral chip of composition arkosic arenite, the mineralogical composition complicacy is various.
The authentication method of feldspar crystal tuff provided by the invention combines above-mentioned theory can identify the feldspar crystal tuff, can foundation be provided for the discovery of petroleum exploration and development oil prospecting direction and find, has practical value.
Embodiment
In order to understand the present invention in depth, the present invention is elaborated below in conjunction with specific embodiment.
The rock sample of burning 1620.24 meters of oil field, mountain H2452 Jing Pingdiquan groups (P2p) with accurate east is a sample; Method among the employing oil and gas industry standard SY/T 5913-2004 of the People's Republic of China (PRC) " rock flaking method " is produced the petrographic thin section of petroclastic rock; Adopt following steps to identify the content of feldspar crystal tuff, concrete steps comprise:
Step 10: select low power objective for use, petrographic thin section is carried out preliminary survey, draw under the low power objective condition, in the FOV, the ratio a of the area of the area of feldspar and quartz;
Step 20: select high power objective for use, petrographic thin section is carried out further accurate measurement, draw under the high power objective condition, in the FOV, the ratio x of the area of the area of feldspar and quartz, wherein, the degree of accuracy of ratio x is higher than the degree of accuracy of ratio a;
Step 30: the size according to the x value, draw expert's conclusion, when x＞5, the rock that petrographic thin section is corresponding is the feldspar crystal tuff.
In the present embodiment, a ≈ x ≈ 10, therefore, the rock sample that 1620.24 meters of oil field, mountain H2452 Jing Pingdiquan groups (P2p) are burnt in accurate east is the feldspar crystal tuff.
Feldspar in the feldspar crystal tuff is a feldspar mineral crystal chip, the pyroclastic tephra that this feldspar mineral crystal chip falls down from the crater when being volcanic eruption, and mineralogical composition is more single.
Feldspar in the arkosic arenite is the mineral chip in the petroclastic rock; Mineral chip in this petroclastic rock is the normal deposition fragmental products that comes from the parent rock carrying; Except that feldspar, also be mixed with other mineral chips such as quartzy and landwaste in the mineral chip of composition arkosic arenite, the mineralogical composition complicacy is various.
The authentication method of feldspar crystal tuff provided by the invention combines above-mentioned theory can identify the feldspar crystal tuff, can foundation be provided for the discovery of petroleum exploration and development oil prospecting direction and find, has practical value.
Above-described embodiment; The object of the invention, technical scheme and beneficial effect have been carried out further explain, and institute it should be understood that the above is merely embodiment of the present invention; Be not limited to the present invention; All within spirit of the present invention and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. the authentication method of a feldspar crystal tuff comprises:
Produce the petrographic thin section of petroclastic rock;
Select low power objective for use, said petrographic thin section is carried out preliminary survey;
Select high power objective for use, said petrographic thin section is carried out further accurate measurement;
Draw the area percentage composition of said petrographic thin section andesine and the ratio x of the area percentage composition of quartz according to said accurate measurement result;
Size according to the x value draws expert's conclusion.
2. authentication method according to claim 1 is characterized in that, said preliminary survey can draw under the low power objective condition, in the FOV, and the ratio a of the area of the area of feldspar and quartz.
3. authentication method according to claim 2 is characterized in that, said accurate measurement can draw under the high power objective condition, in the FOV, and the ratio x of the area of the area of feldspar and quartz.
4. authentication method according to claim 3 is characterized in that the degree of accuracy of said ratio x is higher than the degree of accuracy of said ratio a.
5. according to arbitrary described authentication method in the claim 1,3,4, it is characterized in that when x＞5, the rock that said petrographic thin section is corresponding is the feldspar crystal tuff.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103249332A CN102507582A (en) | 2011-10-24 | 2011-10-24 | Identification method for feldspar crystallinoclastic tuff |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103249332A CN102507582A (en) | 2011-10-24 | 2011-10-24 | Identification method for feldspar crystallinoclastic tuff |
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| CN102507582A true CN102507582A (en) | 2012-06-20 |
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| CN2011103249332A Pending CN102507582A (en) | 2011-10-24 | 2011-10-24 | Identification method for feldspar crystallinoclastic tuff |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018201A (en) * | 2012-12-24 | 2013-04-03 | 中国石油天然气股份有限公司 | Identification method for neutral extrusive rock-andesite |
| CN104422692A (en) * | 2013-08-30 | 2015-03-18 | 中国石油天然气股份有限公司 | Method for identifying particulate volcanic dust tufaceous mud rocks |
| CN104422670A (en) * | 2013-08-30 | 2015-03-18 | 中国石油天然气股份有限公司 | Method for identifying particle-grade volcanic dust tuff |
Citations (3)
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| DE2713717A1 (en) * | 1976-03-29 | 1977-10-06 | Agip Spa | PROCESS FOR THE PRODUCTION OF THIN SECTIONS FOR MICROSCOPIC EXAMINATIONS |
| CN1525154A (en) * | 2003-02-25 | 2004-09-01 | 朱玉双 | Vadose mechanism of transmission micro oil gas and reservoir bed damage analyzer |
| CN101458217A (en) * | 2007-12-12 | 2009-06-17 | 中国石油天然气股份有限公司 | Method for measuring clay minerals relative content in quasi clastic rock gap filler |
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2011
- 2011-10-24 CN CN2011103249332A patent/CN102507582A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2713717A1 (en) * | 1976-03-29 | 1977-10-06 | Agip Spa | PROCESS FOR THE PRODUCTION OF THIN SECTIONS FOR MICROSCOPIC EXAMINATIONS |
| CN1525154A (en) * | 2003-02-25 | 2004-09-01 | 朱玉双 | Vadose mechanism of transmission micro oil gas and reservoir bed damage analyzer |
| CN101458217A (en) * | 2007-12-12 | 2009-06-17 | 中国石油天然气股份有限公司 | Method for measuring clay minerals relative content in quasi clastic rock gap filler |
Non-Patent Citations (1)
| Title |
|---|
| 国家石油和化学工业局: "《SY/T5368-2000中华人民共和国石油天然气行业标准 岩石薄片鉴定》", 10 March 2000, article "5 鉴定内容" * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018201A (en) * | 2012-12-24 | 2013-04-03 | 中国石油天然气股份有限公司 | Identification method for neutral extrusive rock-andesite |
| CN103018201B (en) * | 2012-12-24 | 2015-05-06 | 中国石油天然气股份有限公司 | Identification method for neutral extrusive rock-andesite |
| CN104422692A (en) * | 2013-08-30 | 2015-03-18 | 中国石油天然气股份有限公司 | Method for identifying particulate volcanic dust tufaceous mud rocks |
| CN104422670A (en) * | 2013-08-30 | 2015-03-18 | 中国石油天然气股份有限公司 | Method for identifying particle-grade volcanic dust tuff |
| 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 |
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Inventor after: Zhang Lixia Inventor after: Chen Chunyong Inventor after: Xie Jianyong Inventor after: Li Peijun Inventor after: Shi Yan Inventor after: Xiang Hui Inventor before: Zhang Lixia Inventor before: Li Peijun Inventor before: Shi Yan Inventor before: Li Jianliang Inventor before: Zhu Xiping |
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Free format text: CORRECT: INVENTOR; FROM: ZHANG LIXIA LI PEIJUN SHI YAN LI JIANLIANG ZHU XIPING TO: ZHANG LIXIA CHENCHUNYONG XIE JIANYONG LI PEIJUN SHI YAN XIANG HUI |
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Application publication date: 20120620 |