CN104929626A - Method for identifying lithologic characters of oil reservoirs of carboniferous volcanic rock - Google Patents
Method for identifying lithologic characters of oil reservoirs of carboniferous volcanic rock Download PDFInfo
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- CN104929626A CN104929626A CN201510295343.XA CN201510295343A CN104929626A CN 104929626 A CN104929626 A CN 104929626A CN 201510295343 A CN201510295343 A CN 201510295343A CN 104929626 A CN104929626 A CN 104929626A
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Abstract
The invention relates to a method for identifying lithologic characters of oil reservoirs of carboniferous volcanic rock. The method includes steps of 1), sampling drilled wells; 2), acquiring preliminary data; 3), drawing cross-section graphs of rock debris; 4), creating lithologic relational graphs; 5), classifying lithologic faces; 6), identifying the lithologic characters of the oil reservoirs. The method for identifying the lithologic characters of the oil reservoirs of the carboniferous volcanic rock has the advantages that the lithologic characters of the oil reservoirs of the carboniferous volcanic rock can be quickly and accurately identified, the accurate data can be provided, oil reservoir development risks in later periods can be reduced, and the exploration and development efficiency can be improved.
Description
Technical field
The present invention relates to a kind of Carboniferous System Volcanic Reservoir Lithology Identification Methods.
Background technology
China territory is vast, the a large amount of volcanic reservoirs of underground storage, particularly Karamay, Xinjiang, accurate Ge Er basin one are with, reserves are huge, scale is from millions of ton to hundred million tonnes (oil gas equivalents), but although these oil-gas reservoirs are found very early, but due to the complexity of Potential Volcanic Reservoir, reserves error of calculation is larger, certain risk is brought to oil reservoir development, have impact on the overall efficiency of exploration and development, a kind of effective Carboniferous System Volcanic Reservoir Lithology Identification Methods, is also that current scientific worker is always in the problem of research.
Summary of the invention
The technical problem to be solved in the present invention is: in order to overcome the deficiencies in the prior art, provides a kind of Carboniferous System Volcanic Reservoir Lithology Identification Methods.
The technical solution adopted for the present invention to solve the technical problems is: a kind of Carboniferous System Volcanic Reservoir Lithology Identification Methods, comprises the following steps:
1) well-sampling: dig exploratory well, the method returning row by pressure break constantly obtains the chip in shaft bottom, carries out interval sampling, and make depth correction by landwaste lagged time by certain depth to chip;
2) preliminary data obtains: select the sample that mixes obtained at every turn, after getting rid of the sillar caved in, carry out geologic observations under naked eyes or microscope, describe, name, obtain quality or the percent by volume of various chip sample respectively, determine the rock category of depth selection;
3) draw landwaste sectional drawing: coordinate other log datas, make downhole debris stratigraphic section;
4) lithology graph of a relation is set up: according to step 1) to step 3) data that obtain, by analyzing dissimilar lava to the sensitiveness of log parameter and response characteristic, with the corresponding relation between statistical method research conventional logging parameter and dissimilar lava, establish the graph of a relation of resistivity, natural gamma and lithology;
5) petrofacies divide: according to the macroscopic features of the distribution spatially of volcanic action, volcanism product, output mode and product, in conjunction with landwaste sectional drawing and lithology graph of a relation, realize dividing the petrofacies of lava;
6) oil reservoir Lithology Discrimination: according to petrofacies division result, in conjunction with the lava thickness of well log interpretation, makes Carboniferous System advantage lithology, petrographic map, analyzes the rock stratum oil reservoir of Carboniferous System lava.
As preferably, step 2) in, adopt thin section identification method, mineral or rock sample are ground flakiness, at the Crystallization Characteristics of polarized light microscopy Microscopic observation mineral, measure its optical property, determine the mineralogical composition of rock, study its structure, structure, the genesis sequence of assaying, determine rock type and genetic feature thereof, finally make the title of rock.
As preferably, step 2) in, by interting, explanation, encirclement, intergranular position, illusion and these six kinds of marks of structure determine mineral genesis sequence.
As preferably, step 5) in, lava is divided into subvolcano mouth parfacies, lava plateau parfacies and volcanic deposit parfacies.
The invention has the beneficial effects as follows, this Carboniferous System Volcanic Reservoir Lithology Identification Methods can identify the oil reservoir lithology of Carboniferous System lava rapidly and accurately, provide data comparatively accurately, reduce the risk of later stage oil reservoir development, improve the efficiency of exploration and development.
Detailed description of the invention
A kind of Carboniferous System Volcanic Reservoir Lithology Identification Methods, comprises the following steps:
1) well-sampling: dig exploratory well, the method returning row by pressure break constantly obtains the chip in shaft bottom, carries out interval sampling, and make depth correction by landwaste lagged time by certain depth to chip;
2) preliminary data obtains: select the sample that mixes obtained at every turn, after getting rid of the sillar caved in, carry out geologic observations under naked eyes or microscope, describe, name, obtain quality or the percent by volume of various chip sample respectively, determine the rock category of depth selection;
3) draw landwaste sectional drawing: coordinate other log datas, make downhole debris stratigraphic section;
4) lithology graph of a relation is set up: according to step 1) to step 3) data that obtain, by analyzing dissimilar lava to the sensitiveness of log parameter and response characteristic, with the corresponding relation between statistical method research conventional logging parameter and dissimilar lava, establish the graph of a relation of resistivity, natural gamma and lithology;
5) petrofacies divide: according to the macroscopic features of the distribution spatially of volcanic action, volcanism product, output mode and product, in conjunction with landwaste sectional drawing and lithology graph of a relation, realize dividing the petrofacies of lava;
6) oil reservoir Lithology Discrimination: according to petrofacies division result, in conjunction with the lava thickness of well log interpretation, makes Carboniferous System advantage lithology, petrographic map, analyzes the rock stratum oil reservoir of Carboniferous System lava.
As preferably, step 2) in, adopt thin section identification method, mineral or rock sample are ground flakiness, at the Crystallization Characteristics of polarized light microscopy Microscopic observation mineral, measure its optical property, determine the mineralogical composition of rock, study its structure, structure, the genesis sequence of assaying, determine rock type and genetic feature thereof, finally make the title of rock.
As preferably, step 2) in, by interting, explanation, encirclement, intergranular position, illusion and these six kinds of marks of structure determine mineral genesis sequence.
Wherein, intert: mineral intert another mineral or mineral assemblage, generated comparatively early by interspersed person;
Explanation: the mineral of XianCheng hand over by the mineral of rear one-tenth, often aobvious metasomatic relict texture;
Surround: all or part of of preexisting mineral surround by guest;
Intergranular position: guest is created between the particle of preexisting mineral;
Illusion: after preexisting mineral is handed over by guest, still retains its original crystalline form, as magnetic iron ore become martite after still retain the crystalline form of its isometric system;
Structure: in symmetric(al) banded structure, outer mineral are early than internal layer mineral: the mineral in miarolitic structure are generally later than the mineral of hole wall.
As preferably, step 5) in, lava is divided into subvolcano mouth parfacies, lava plateau parfacies and volcanic deposit parfacies.
Compared with prior art, this Carboniferous System Volcanic Reservoir Lithology Identification Methods can identify the oil reservoir lithology of Carboniferous System lava rapidly and accurately, provide data comparatively accurately, reduce the risk of later stage oil reservoir development, improve the efficiency of exploration and development.
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on manual, must determine its technical scope according to right.
Claims (4)
1. a Carboniferous System Volcanic Reservoir Lithology Identification Methods, is characterized in that, comprises the following steps:
1) well-sampling: dig exploratory well, the method returning row by pressure break constantly obtains the chip in shaft bottom, carries out interval sampling, and make depth correction by landwaste lagged time by certain depth to chip;
2) preliminary data obtains: select the sample that mixes obtained at every turn, after getting rid of the sillar caved in, carry out geologic observations under naked eyes or microscope, describe, name, obtain quality or the percent by volume of various chip sample respectively, determine the rock category of depth selection;
3) draw landwaste sectional drawing: coordinate other log datas, make downhole debris stratigraphic section;
4) lithology graph of a relation is set up: according to step 1) to step 3) data that obtain, by analyzing dissimilar lava to the sensitiveness of log parameter and response characteristic, with the corresponding relation between statistical method research conventional logging parameter and dissimilar lava, establish the graph of a relation of resistivity, natural gamma and lithology;
5) petrofacies divide: according to the macroscopic features of the distribution spatially of volcanic action, volcanism product, output mode and product, in conjunction with landwaste sectional drawing and lithology graph of a relation, realize dividing the petrofacies of lava;
6) oil reservoir Lithology Discrimination: according to petrofacies division result, in conjunction with the lava thickness of well log interpretation, makes Carboniferous System advantage lithology, petrographic map, analyzes the rock stratum oil reservoir of Carboniferous System lava.
2. Carboniferous System Volcanic Reservoir Lithology Identification Methods as claimed in claim 1, it is characterized in that, step 2) in, adopt thin section identification method, mineral or rock sample are ground flakiness, at the Crystallization Characteristics of polarized light microscopy Microscopic observation mineral, measure its optical property, determine the mineralogical composition of rock, study its structure, structure, the genesis sequence of assaying, determines rock type and genetic feature thereof, finally makes the title of rock.
3. Carboniferous System Volcanic Reservoir Lithology Identification Methods as claimed in claim 2, is characterized in that, step 2) in, determine mineral genesis sequence by interspersed, explanation, encirclement, intergranular position, illusion and these six kinds of marks of structure.
4. Carboniferous System Volcanic Reservoir Lithology Identification Methods as claimed in claim 1, is characterized in that, step 5) in, lava is divided into subvolcano mouth parfacies, lava plateau parfacies and volcanic deposit parfacies.
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Cited By (5)
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| CN106777707A (en) * | 2016-12-21 | 2017-05-31 | 山东科技大学 | A kind of method that WELL LITHOLOGY quantitative judge is carried out using improved spider diagram |
| CN106930777A (en) * | 2017-04-14 | 2017-07-07 | 中铁六局集团有限公司 | The construction method of the lining of Bored Section of Metro main track assembled two |
| CN107435537A (en) * | 2016-05-26 | 2017-12-05 | 中石化石油工程技术服务有限公司 | The method and device that a kind of well logging destination layer divides automatically |
| CN112541607A (en) * | 2019-09-23 | 2021-03-23 | 中国石油天然气股份有限公司 | Volcanic oil reservoir productivity prediction method and device |
| CN116184527A (en) * | 2023-04-25 | 2023-05-30 | 西南石油大学 | Magma rock lithology discrimination method and device based on element logging and imaging logging |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107435537A (en) * | 2016-05-26 | 2017-12-05 | 中石化石油工程技术服务有限公司 | The method and device that a kind of well logging destination layer divides automatically |
| CN106777707A (en) * | 2016-12-21 | 2017-05-31 | 山东科技大学 | A kind of method that WELL LITHOLOGY quantitative judge is carried out using improved spider diagram |
| CN106930777A (en) * | 2017-04-14 | 2017-07-07 | 中铁六局集团有限公司 | The construction method of the lining of Bored Section of Metro main track assembled two |
| CN106930777B (en) * | 2017-04-14 | 2018-08-24 | 中铁六局集团有限公司 | The construction method that Bored Section of Metro main track assembled two serves as a contrast |
| CN112541607A (en) * | 2019-09-23 | 2021-03-23 | 中国石油天然气股份有限公司 | Volcanic oil reservoir productivity prediction method and device |
| CN116184527A (en) * | 2023-04-25 | 2023-05-30 | 西南石油大学 | Magma rock lithology discrimination method and device based on element logging and imaging logging |
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