CN103529487A - Method for judging mantle-derived CO2 charging time - Google Patents
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Abstract
The invention provides a method for judging mantle-derived CO2 charging time, and belongs to the field of oil and gas geology. According to the invention, the cause of formation of dawsonite is judged by creating a diagenetic intergrowth sequence of sandstone containing dawsonite, so as to determine the sequential relationship of charging of mantle-derived CO2 and oil and gas, judge the charging time of oil in sandstone containing different types of dawsonite and finally judge the mantle-derived CO2 charging time to obtain the mantle-derived CO2 charging time. According to the invention, the mantle-derived CO2 charging time is judged according to the dawsonite, so that an effective and accurate method is provided for judging the charging time of the mantle-derived CO2 in a petroliferous basin having multi-phase volcanic activities and filled with fluid.
Description
Technical field
The invention belongs to oil and gas geology field, be specifically related to a kind of curtain source CO
2the method of discrimination of infilling time.
Background technology
Curtain source CO in sedimentary basin
2infilling time be to carry out CO
2-sandstone interacts and CO
2the basis of-crude oil repercussion study.Most CO in the world
2the formation in gas (Tibetan) field is relevant with magmation, and, CO
2gas (Tibetan) field and the volcanics that has genetic relationship with it are mostly spatially contiguous or have the passage of transporting and link up, and the former is developing or discarded CO as 9 on Colorade USA plateau
2gas field (non-patent literature 1), Bohai gulf basin spend 17, positive 25 gas reservoirs and Gaoqing gas field (non-patent literature 2), the latter is as square atmosphere of being king Zang He Pingnan County gas reservoir (non-patent literature 3) of Bohai gulf basin.The inorganic CO with commercial value that Eastern China is found at present
2gas field all belongs to the volcanic-mantle origin cause of formation (non-patent literature 4), basin as distant in pine south ten thousand quintar CO
2the prosperous moral east gas reservoir in gas reservoir, the north, Jiyang Depression, The Bohaiwan Basin square king CO
2huang Qiao CO of gas reservoir, Subei Basin
2gas reservoir and three piece of water CO
2gas reservoir etc.These volcanic-mantles CO
2the distribution of gas reservoir (seedling) and northern west basaltic magma mobile belt spread consistent (non-patent literature 5) in 9 Neogene period to Quaternary period, as Jiyang depression CO
2gas reservoir is mainly distributed in Yangxin area that Cenozoic volcanic rocks grows and Gaoqing, Pingnan County, flower ditch one band; HUANGHUA DEPRESSION CO
2the Zhai village that gas accumulations distribution is grown in Cenozoic basalt, friendly village, big-and-middle prosperous and neat housework area (non-patent literature 6); The distant basin of pine ten thousand Jinta area 10,000 wells bore meets the volcanics that cumulative thickness is 937m; Wuerxun Sag in Hailaer Basin CO
2near copper 1 well gas reservoir bores meets geochemistry of Yanshanian granitoids, revives 8, revives 3, the high yield CO such as 16 revive
2well also bore volcanics such as meeting trachyte and eruptive tuff; And inorganic CO
2(non-patent literature 7) on crater is just located in Tian Chi Lake of Mountain Baitou and Wudalianchi that gas seepage is grown.Above statement of facts volcanics and inorganic CO
2the distribution relation of gas reservoir (seedling) is close, is curtain source CO
2the gas source rock of gas reservoir.
Based on this understanding, some researchers will with CO
2there is the eruption age of the volcanics of genetic relationship to be considered as CO
2the infilling time of gas reservoir, for example, the Bravo fornix CO on Colorade USA plateau
2the infilling time in gas field is (10～8ka), McElmo fornix CO
2the infilling time in gas field is 70～42Ma (non-patent literature 1); Australia Otway basin Ladbroke Grove natural-gas field (CO
2content is 26～57mol%) infilling time be 1Ma～4500a (non-patent literature 8).The method is current CO
2the main method of discrimination of gas reservoir infilling time.
Said method is easy-to-understand, and application is simple, is the method that Chinese scholars generally adopts.But when basin and periphery have the volcanicity of many phases and when fluid-filled, simply quote the volcanic eruption age and can not really determine curtain source CO
2infilling time, two phase hydrocarbon charge events once occurred south, as distant in pine basin middle-shallow layer, its infilling time is respectively 85～65Ma and 50～25Ma(non-patent literature 9); There is to take respectively the three phases volcanicity that Upper Cretaceous Datun Huoshanqun (92.3Ma), Paleogene Period Shuangliao volcanic cluster (51.0～41.6Ma) (non-patent literature 10) and Wudalianchi Huoshanqun in the Quaternary period (0.56～0.27Ma, 1719-1721a and 1721a) (non-patent literature 11) are representative in pine inside, distant basin and surrounding area.Therefore, must look for another way, find a kind of curtain source CO that indirectly, effectively determines
2the approach of infilling time.
Summary of the invention
Problem to be solved by this invention is too much phase to occur during hydrocarbon charge event in stratum, how effectively to determine curtain source CO
2infilling time.
The present invention is by CO
2" tracing mineral "-dawsonite solve this difficult problem, emphasis has been found out the CO of dawsonite record
2the origin cause of formation and infilling time.
Concrete steps of the present invention comprise:
1, set up the diagenesis paragenetic sequence of lozenge sodium aluminium stone sand rock: the X-ray diffraction analysis, JSM-6700 type scanning electron microscope, the CL8200MK3& that adopt ﹤ 2 μ m parts in polarizing microscope, carbonate mineral dyeing, sandstone; The analysis test methods such as 4 type optics cathodeluminescence platforms, image analysis software, determine classification and the content of sandstone skeleton composition, determine type and the content of cementing matter and authigenic mineral, determine the mutual relationship between diagenesis types, identify CO<sub TranNum="104">2</sub>fill front and CO<sub TranNum="105">2</sub>diagenesis paragenetic association after filling, and then set up the diagenesis paragenetic sequence of lozenge sodium aluminium stone sand rock.
2, the origin cause of formation of dawsonite is differentiated: utilize polarizing microscope or scanning electron microscope to find out the mineral with dawsonite symbiosis, then dawsonite is carried out to carbon oxygen isotope analysis, described carbon oxygen isotope analysis is to adopt Within Monominerals mass spectrometry or laser microprobe mass spectrometer analytic approach, by kalzit-CO
2fractionation factor as being equivalent to synthermal lower dawsonite-CO
2fractionation factor calculate the CO with dawsonite balance
2after the carbon isotope value of gas, utilize organic or inorganic CO
2differentiate plate (referring to Fig. 1) method, differentiate the CO with dawsonite balance
2the origin cause of formation of gas, the i.e. origin cause of formation of dawsonite.
3, determine curtain source CO
2sequential relationship with hydrocarbon charge: judge that dawsonite is as inorganic, with the CO of dawsonite balance
2gas is curtain source CO
2afterwards, with oil-containing CO
2in gas reservoir and oil reservoir, lozenge sodium aluminium stone sand rock is research object, take polarizing microscope and fluorescent microscope as Main Means, carries out following observation and analysis: (1) utilizes polarizing microscope, with spike CO
2filled dawsonite, for sign, identifies CO in diagenesis paragenetic sequence
2fill front and CO
2diagenesis paragenetic association after filling; (2) utilize polarizing microscope, fluorescent microscope, at CO
2fill front and CO
2in the authigenic mineral forming after filling and in healing crack, find oil gas inclusion, intergranular oil stain and pitch; (3) comprehensive definite CO on the basis of above-mentioned observation
2the precedence filled with oil, if at CO
2in the authigenic mineral forming before filling and in healing crack, find oil gas inclusion, intergranular oil stain and pitch, hydrocarbon charge formerly; Vice versa.
4, the differentiation of the oil infilling time in dissimilar lozenge sodium aluminium stone sand rock: (1) oil-containing CO
2gas reservoir lozenge sodium aluminium stone sand rock PetroChina Company Limited. infilling time, first, utilizes cold and hot of THMS600 and TS1500 type to measure oil-containing CO
2the homogenization temperature of salt solution inclusion in gas reservoir (with oil gas inclusion symbiosis); Then, according to peak value homogenization temperature, determine the phase time of hydrocarbon charge; Finally, in conjunction with buried history and thermal evolution history curve, determine the infilling time of each phase time oil.(2) the oil infilling time in oil reservoir lozenge sodium aluminium stone sand rock, according to the authigenic illite K/Ar age determination data in oil reservoir, determines the infilling time of oil.
5, curtain source CO
2the differentiation of infilling time: the position according to dawsonite in diagenesis paragenetic sequence, in conjunction with the hydrocarbon charge time in this diagenesis paragenetic sequence, can determine curtain source CO
2filled the range of age.(1) CO during first phase hydrocarbon charge
2the differentiation of infilling time: first, according to the authigenic illite K/Ar age determination data in oil reservoir, determine the infilling time of oil; Then, determine curtain source CO
2with the sequential relationship of hydrocarbon charge, constraint curtain source CO
2(curtain source CO of filled upper and lower limit time
2fill and be later than hydrocarbon charge, this age data is the lower limit time; Otherwise it is the upper limit time); Finally, in conjunction with appearing and drilling well age of volcanic rock data, determine curtain source CO
2the suitable age filling.(2) CO during hydrocarbon charge of many phases
2the differentiation of infilling time: first utilize fluid inclusion homogenization temperature, determine the phase time of hydrocarbon charge; Then, the position according to dawsonite in diagenesis paragenetic sequence, determines curtain source CO
2sequential relationship with hydrocarbon charge; Finally, according to oil infilling time, determine curtain source CO
2filled the range of age.(3) with the quasi-instantaneous CO of hydrocarbon charge
2the differentiation of infilling time: according to paragenetic sequence and Fluid-inclusion analysis, if confirm curtain source CO
2infilling time and the quasi-instantaneous words of certain phase hydrocarbon charge, utilize fixed year of illite K/Ar or fluid inclusion homogenization temperature comprehensively to analyze this hydrocarbon charge time phase that (in conjunction with buried history and thermal history) draw and be curtain source CO
2infilling time.
Within Monominerals mass spectrometry in described carbon oxygen isotope analysis is: for the high sample of dawsonite content, adopt physical separation method to obtain dawsonite Within Monominerals and carry out carbon oxygen isotope analysis.Than silicate mineral and the low feature of other carbonate minerals, first that lozenge sodium aluminium stone sand rock dust is broken, slightly grind according to dawsonite proportion; Then, utilize heavy-fluid isolation technics to obtain dawsonite Within Monominerals, finally, utilize the purity of X-ray diffraction analytical control dawsonite.
Laser microprobe mass spectrometer analytic approach in described carbon oxygen isotope analysis is: for the lower sample of dawsonite content, will adopt " laser microprobe mass spectrometer analytic approach " to measure.Under the microscope, utilize laser beam heats object carbonate mineral, make it decomposite CO
2gas.By the CO obtaining
2gas send the micro-sampling system of mass spectrometer (MAT251/MAT252 etc.) to test its carbon oxygen isotope after vacuum refrigeration purifying.Its great advantage is to have higher spatial resolution.
Described dawsonite-CO
2fractionation factor to calculate be to adopt following equation to calculate:
The fixed year more conventional source rock Ding Nianfa of method of mineral of the present invention has following advantage:
(1) method application of the present invention is wider.Curtain source CO
2source rock Ding Nianfa is applicable to CO
2only there is first phase volcanicity gas reservoir development area, or has that volcano of many phases is movable but which phase volcanicity and CO the restriction of the migration pathway such as can rupture judges
2gas reservoir be formed with direct relation.And curtain source CO
2mineral Ding Nianfa has broken away from above-mentioned restriction, for there being curtain source CO in the volcanicity of many phases and fluid-filled petroliferous basin
2the judgement of infilling time provides effective ways.
(2) method precision of the present invention is higher.Curtain source CO
2source rock Ding Nianfa be with CO
2it is its infilling time that gas reservoir has the age of volcanic rock of genetic relationship, these age of volcanic rock data and curtain source CO
2infilling time can be in full accord (the fast rapid-result Tibetan same period), also may differ large (later stage repeatedly becomes to hide).And curtain source CO
2mineral Ding Nianfa is by curtain source CO
2with the sequential relationship of hydrocarbon charge, by oil infilling time, differentiate curtain source CO
2infilling time, error is little, precision is high.
Accompanying drawing explanation:
Fig. 1: organic or inorganic CO
2differentiate plate
Fig. 2: south, loose distant basin forms the CO of dawsonite
2the origin cause of formation is differentiated figure
Embodiment:
The experimental technique using in embodiment below if no special instructions, is conventional method.
Below by curtain source CO
2the mineral Ding Nianfa of infilling time is in the further instruction that should be used in south, the distant basin of pine.
1, determine the diagenesis paragenetic sequence of lozenge sodium aluminium stone sand rock
In south, the distant basin of pine, dawsonite authigenic mineral is mainly distributed in four sections of the spring head groups of magnificent word well terrace and Fuxin uplift, in Qingshankou group-Yao Jia group on the terrace, Qingshankou group San Duanhehong hilllock of Changling Sag and three sections of sandstone of Nenjiang group.The rock type of lozenge sodium aluminium stone sand rock is mainly arkosic arenite, feldspar rock-fragment sandstone and landwaste arkosic arenite.Polarizing microscope and scanning electron microscopic observation show, CO
2the authigenic mineral combination forming after filling be mainly dawsonite, ferrodolomite and late period kalzit.Except with authigenic mineral form output, at Fuxin uplift, dawsonite is also distributed in sandstone crack.In crack, dawsonite is half filling shape, and part, crack is seen oil-impregnation phenomenon.
2, the origin cause of formation of dawsonite is differentiated
Utilize polarizing microscope or scanning electron microscope to find out the mineral with dawsonite symbiosis, then dawsonite is carried out to carbon oxygen isotope analysis, find the δ of dawsonite in magnificent word well terrace, terrace, Changling Sag He Hong hilllock sandstone
13c distribution range is-5.30 ‰～3.29 ‰ (PDB), and wherein 82.8% data are distributed in-2 ‰～2 ‰ (PDB) interval; δ
18the distribution range of O is wider, is 8.95 ‰～21.04 ‰ (SMOW).Generally,, δ wide with sample distribution
13c data distribute and concentrate as feature.According to dawsonite-CO
2fractionation factor accounting equation show the δ with dawsonite balance
13c
cO2scope be-11.7 ‰～-4.2 ‰.Further analyze and find, the CO in loose distant basin
2take inorganic as main, its δ
13c
cO2between-2 ‰～-10 ‰, mean value is-5 ‰ left and right, is the volcanic-mantle origin cause of formation.According to this standard, the dawsonite in south, loose distant basin main (89.6%) is formed at inorganic CO
2background, a small amount of (10.4%) is formed at organic C O
2background (referring to Fig. 2).Illustrate that south, loose distant basin causes the CO that dawsonite forms
2with the CO in gas reservoir
2there is identical carbon source, be the volcanic-mantle origin cause of formation.
3, determine curtain source CO
2sequential relationship with hydrocarbon charge
(1) differentiation of Oil and gas charging period
According to the Hydrocarbon Property in the oil gas inclusion of south, the distant basin of pine, in conjunction with its host minerals or occurrence, the hydrocarbon charge in lozenge sodium aluminium stone sand rock was obviously divided into for two phases.
First phase inclusion is mainly liquid hydrocarbon inclusion, is gas-liquid hydrocarbon inclusion on a small quantity.Inclusion is composed and is stored in early stage quartz overgrowth limit, early stage kalzit and cuts and do not cut in the crack of wearing quartz overgrowth limit.In early days in quartz overgrowth limit, inclusion is fragmentary or one-tenth band distribution along inner side, secondary enlargement limit, growth abundance differs greatly, low abundance (GOI < 0.5%), medium abundance (GOI is about 1%～3%) and high abundance (GOI is about 10%) person all have output, being mainly liquid hydrocarbon inclusion, is gas-liquid hydrocarbon inclusion on a small quantity.The inclusion that tax is stored in early stage kalzit distributes in groups, is brown, auburn liquid hydrocarbon inclusion.In cutting and do not cut the crack of wearing quartz overgrowth limit, inclusion is zonal arrangement, is mainly liquid hydrocarbon inclusion, is individually gas-liquid hydrocarbon inclusion.With the homogenization temperature peak value different regions of the salt solution inclusion of first phase oil gas inclusion symbiosis difference slightly, wherein terrace, ，Hong hilllock is 70～90 ℃, and Qianan depression is 70～80 ℃, and magnificent word well terrace is 70～100 ℃.
Second phase inclusion is mainly gas-liquid hydrocarbon inclusion (accounting for 60%～90%), is secondly liquid hydrocarbon inclusion (accounting for 40%～9%), is extremely individually gas hydrocarbon inclusion (accounting for 1% left and right).Inclusion is composed and is stored in kalzit in late period, quartz overgrowth in late period limit, dawsonite and wears in the microfissure of cutting clastic quitz and secondary enlargement limit thereof and in chip feldspar.Tax is stored in inclusion in quartz overgrowth in late period limit and grows abundance medium (GOI is about 3%), inclusion in groups, become band to distribute.Tax be stored in late period kalzit and dawsonite in inclusion in groups or isolated shape distribute, wherein, the inclusion in late period kalzit is grown abundance high (see and have inclusion in kalzit approximately 70%～80% late period).In wearing the microfissure of cutting clastic quitz and secondary enlargement limit thereof, inclusion is zonal arrangement.In detrital feldspar, inclusion also in groups, become band to distribute.The homogenization temperature peak value of the salt solution inclusion of Hong Gang terrace and second phase oil gas inclusion symbiosis is 100～120 ℃, and Qianan depression is 90～100 ℃, and magnificent word well terrace is 110～120 ℃.
(2) curtain source CO
2sequential relationship with hydrocarbon charge
Diagenesis paragenetic sequence and the Study of fluid inclusions of lozenge sodium aluminium stone sand rock show, loose distant basin, in middle-shallow layer stratum, south, the fluid-filled process of three phase resources had once occurred.The first phase take liquid hydrocarbon and fills as main, and the second phase take gas-liquid hydrocarbon and fills as main, and the third phase is curtain source CO
2fill.Curtain source CO
2fill be slightly later than second phase hydrocarbon charge or with its roughly simultaneously, material evidence is:
1. first phase oil gas inclusion (take liquid hydrocarbon inclusion as main) is grown in the inner side on quartz overgrowth limit, and second phase oil gas inclusion (take gas hydrocarbon inclusion as main) is grown in outside, and spike CO
2the general filling of filled dawsonite remaining pore space after the crystallization of quartz overgrowth limit, illustrates CO
2fill and to be slightly later than second phase hydrocarbon charge.
2. in dawsonite, compose and deposit second phase oil gas inclusion (gas liquid inclusion), hint is when dawsonite crystallization, and pore fluid is with CO
2and the component that is dissolved in local water is main, oil gas is auxiliary.
3. in wearing the inclusion of cutting in clastic quitz and secondary enlargement limit microfissure thereof, gas phase CO not only detected
2, liquid phase CO
2and CO
3 2-, and CH detected
4component, illustrates CO
2extraction to hydro carbons had once occurred in migration process, although can not get rid of the possibility of the hydro carbons that extracts early origin, the possibility of filled hydro carbons is larger simultaneously with its standard in extraction.
4, the differentiation of oil infilling time
Fixed year of illite K/Ar that Zou Caineng etc. (non-patent literature 9) carry out for Fuxin uplift Fuyu Reservoirs and fluid inclusion homogenization temperature are comprehensively analyzed the two phase oil gas injection lengths that (in conjunction with buried history and thermal history) draw and are followed successively by 85～65Ma and 50～25Ma, the former is equivalent to Nenjiang-open fire phase, and the latter's main body is Paleogene Period.
5, curtain source CO
2the differentiation of infilling time
By the research in crack, south, the distant basin of pine is found, in macroscopic fracture, both seen and had drusy dawsonite stuff, see again and have oil-containing phenomenon, illustrate that crack and microfissure are all formed at CO
2before second phase hydrocarbon charge.Although be Nenjiang phase-open fire phase Nenjiang end of term still to have different understanding or statement for south, the distant basin of pine first phase oil gas injection length, but second phase hydrocarbon charge betides Cretaceous period end (the open fire end of term)-Paleogene Period and has but obtained general approval.In view of second phase hydrocarbon charge and curtain source CO
2filled accurate simultaneously, therefore, curtain source CO
2fill also should betide Cretaceous period end (the open fire end of term)) Paleogene Period.
List of references
[1]Gilfillan?S?M?V,Ballentine?C?J,Holland?G,et?al.The?noble?gas?geochemistry?of?natural?CO2gas?reservoirs?from?The?Colorado?Plateau?and?Rocky?Mountain?provinces,USA.Geochimica?et?Cosmochimica?Acta,200872:1174–1198.
[2] once spattering brightness. Dongying Depression hot fluid is movable and on the interactional impact of water-rock. the journal .2000 of geoscience-China University of Geosciences, 25 (2): 133-142.
[3] Hu Anping, wears Venus, Yang Chun, Zhou Qinghua, Ni Yunyan. Bohai gulf basin C0
2gas field (Tibetan) Geochemical Characteristics and distribution. petroleum prospecting and exploitation, 2009,36(2): 181-189.
[4] Zhang Shuichang, Zhu Guangyou. Sedimentary Basins of China medium gas fields distributes and Natural Gas Origin. and Chinese science D collects: geoscience .2007,37 (supplementary issue II): 1-11.
[5] wear Venus, Hu Guoyi, Ni Yunyan etc. Eastern China Distribution of Natural feature. rock gas geoscience .2009,20 (4): 471-487.
[6] Wang Xingmou, Xia Bin, Chen Genwen etc. East China Cenozoic magmation is to regional CO
2the restriction of formation time. macrotectonics and metallogeny, 2004a, 28 (3): 338-344.
[7] Qu Xiyu, Liu Li, high jade is skilful etc. Northeast Area of China volcanic-mantle CO
2the geologic record that tax is deposited. petroleum journal .2010,31 (1): 74-80.
[8]Watson?M?N,Zwingmann?N,Lemon?N?M.The?ladbroke?grove-katnook?carbon?dioxide?natural?laboratory:a?recent?CO
2accumulation?in?a?lithic?sandstones?reservoir.Energy,2004,29:1457-1466.
[9] Zou Caineng, Tao Shizhen, Zhang Youyu. the distant southern lithologic character stratum Hydrocarbon Accumulation age research of pine and exploration meaning thereof. Science Bulletin, 2007,52 (19): 2319-2329.
[10] Zhang Huihuang, Xu Yigang, Ge Wenchun, Ma Jinlong. Yitong Jilin-collect greatly Geochemical Characteristics and the meaning thereof of Late Mesozoic-Cenozoic basalt. rock journal, 2006,22(6): 1579-1596
[11] Liu Jiaqi. the Chronologic Study of East China Cenozoic volcanic rocks. rock journal, 1987,3 (4): 21-31.
Claims (10)
1. a curtain source CO
2the method of discrimination of infilling time, is characterized in that the method comprises the following steps:
A. set up the diagenesis paragenetic sequence of lozenge sodium aluminium stone sand rock;
B. the origin cause of formation of dawsonite is differentiated;
C. determine curtain source CO
2sequential relationship with hydrocarbon charge;
D. the differentiation of the oil infilling time in dissimilar lozenge sodium aluminium stone sand rock:
E. curtain source CO
2the differentiation of infilling time.
2. method of discrimination as claimed in claim 1, the described diagenesis paragenetic sequence of setting up lozenge sodium aluminium stone sand rock is X-ray diffraction analysis, JSM-6700 type scanning electron microscope, the CL8200MK3& that adopts ﹤ 2 μ m parts in polarizing microscope, carbonate mineral dyeing, sandstone; 4 type optics cathodeluminescence platform or image analysis software analysis test methods, determine type and the content of sandstone skeleton clastic constituents, determine type and the content of cementing matter and authigenic mineral, determine the mutual relationship between diagenesis types, identify CO<sub TranNum="250">2</sub>fill front and CO<sub TranNum="251">2</sub>diagenesis paragenetic association after filling, and then set up the diagenesis paragenetic sequence of lozenge sodium aluminium stone sand rock.
3. method of discrimination as claimed in claim 1, it is to utilize polarizing microscope or scanning electron microscope to find out the mineral with dawsonite symbiosis that the origin cause of formation of described dawsonite is differentiated, then dawsonite is carried out to carbon oxygen isotope analysis, described carbon oxygen isotope analysis is to adopt Within Monominerals mass spectrometry or laser microprobe mass spectrometer analytic approach, by kalzit-CO
2fractionation factor be considered as being equivalent to synthermal lower dawsonite-CO
2fractionation factor calculate the CO with dawsonite balance
2after the carbon isotope value of gas, utilize organic or inorganic CO
2differentiate plate method, differentiate the CO with dawsonite balance
2the origin cause of formation of gas, the i.e. origin cause of formation of dawsonite.
4. method of discrimination as claimed in claim 1, described definite curtain source CO
2with the sequential relationship of hydrocarbon charge be with oil-containing CO
2in gas reservoir and oil reservoir, lozenge sodium aluminium stone sand rock is research object, take polarizing microscope and fluorescent microscope as Main Means, carries out following observation and analysis: (1) utilizes polarizing microscope, with spike CO
2filled dawsonite, for sign, identifies CO in diagenesis paragenetic sequence
2fill front and CO
2diagenesis paragenetic association after filling; (2) utilize polarizing microscope, fluorescent microscope, at CO
2fill front and CO
2in the authigenic mineral forming after filling and in healing crack, find oil gas inclusion, intergranular oil stain and pitch; (3) comprehensive definite CO on the basis of above-mentioned observation
2the precedence filled with oil, if at CO
2in the authigenic mineral forming before filling and in healing crack, find oil gas inclusion, intergranular oil stain and pitch, hydrocarbon charge formerly; Vice versa.
5. method of discrimination as claimed in claim 1, the differentiation of the oil infilling time in dissimilar lozenge sodium aluminium stone sand rock is: (1) is for oil-containing CO
2gas reservoir lozenge sodium aluminium stone sand rock PetroChina Company Limited. infilling time, first, utilizes cold and hot of THMS600 and TS1500 type to measure oil-containing CO
2the homogenization temperature of salt solution inclusion in gas reservoir (with oil gas inclusion symbiosis); Then, according to peak value homogenization temperature, determine the phase time of hydrocarbon charge; Finally, in conjunction with buried history and thermal evolution history curve, determine the infilling time of each phase time oil; (2) the oil infilling time in oil reservoir lozenge sodium aluminium stone sand rock, according to the authigenic illite K/Ar age determination data in oil reservoir, determines the infilling time of oil.
6. method of discrimination as claimed in claim 1, described curtain source CO
2the differentiation of infilling time is the position in diagenesis paragenetic sequence according to dawsonite, in conjunction with the hydrocarbon charge time in this diagenesis paragenetic sequence, determines curtain source CO
2filled the range of age.
7. method of discrimination as claimed in claim 3, the Within Monominerals mass spectrometry in described carbon oxygen isotope analysis is for the high sample of dawsonite content, first, lozenge sodium aluminium stone sand rock dust is broken, slightly grind; Then, utilize heavy-fluid isolation technics to obtain dawsonite Within Monominerals, finally, utilize the purity of X-ray diffraction analytical control dawsonite.
8. method of discrimination as claimed in claim 3, the laser microprobe mass spectrometer analytic approach in described carbon oxygen isotope analysis is: for the lower sample of dawsonite content, under the microscope, utilize laser beam heats object carbonate mineral, make it decomposite CO
2gas, by the CO obtaining
2gas send the micro-sampling system of mass spectrometer to test its carbon oxygen isotope after vacuum refrigeration purifying.
9. method of discrimination as claimed in claim 3, described dawsonite-CO
2fractionation factor calculate to adopt equation
Calculate.
10. method of discrimination as claimed in claim 1, wherein said curtain source CO
2the differentiation of infilling time is: CO during for first phase hydrocarbon charge
2the differentiation of infilling time: first, according to the authigenic illite K/Ar age determination data in oil reservoir, determine the infilling time of oil; Then, determine curtain source CO
2with the sequential relationship of hydrocarbon charge, constraint curtain source CO
2the filled upper and lower limit time, curtain source CO
2fill and be later than hydrocarbon charge, this age data is the lower limit time; Otherwise be the upper limit time, last, in conjunction with appearing and drilling well age of volcanic rock data, determine curtain source CO
2the suitable age filling; For CO during hydrocarbon charge of many phases
2the differentiation of infilling time: first utilize fluid inclusion homogenization temperature, determine the phase time of hydrocarbon charge; Then, the position according to dawsonite in diagenesis paragenetic sequence, determines curtain source CO
2sequential relationship with hydrocarbon charge; Finally, according to oil infilling time, determine curtain source CO
2filled the range of age; For with the quasi-instantaneous CO of hydrocarbon charge
2the differentiation of infilling time: according to paragenetic sequence and Fluid-inclusion analysis, if confirm curtain source CO
2infilling time and the quasi-instantaneous words of certain phase hydrocarbon charge, utilize that fixed year of illite K/Ar or fluid inclusion homogenization temperature are comprehensive to be analyzed this hydrocarbon charge time phase drawing in conjunction with buried history and thermal history and be curtain source CO
2infilling time.
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| CN105911259A (en) * | 2016-07-07 | 2016-08-31 | 中国石油大学(华东) | Method for judging evolution process of rock fluid forming after carbon dioxide injected into sandstone |
| CN106932832A (en) * | 2015-12-30 | 2017-07-07 | 核工业北京地质研究院 | One kind contains CO2Fluid inclusion light microscope recognition methods |
| CN109060928A (en) * | 2018-07-18 | 2018-12-21 | 中国石油天然气股份有限公司 | Method and device for quantitatively judging carbonate cement formation and oil gas filling time sequence |
| CN110018528A (en) * | 2019-04-24 | 2019-07-16 | 西安幔源油气勘探开发研究有限公司 | Curtain source oil and gas composite geological analysis |
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| CN110018528A (en) * | 2019-04-24 | 2019-07-16 | 西安幔源油气勘探开发研究有限公司 | Curtain source oil and gas composite geological analysis |
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| CN110412204B (en) * | 2019-06-28 | 2021-10-12 | 中国石油大学(华东) | Visualization method for simulating influence of multi-stage oil filling on carbonate cementation |
| CN114047559A (en) * | 2021-10-29 | 2022-02-15 | 核工业北京地质研究院 | Method for determining uranium ore distribution area |
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