CN112282745A - Method for determining fire flooding combustion temperature of heavy oil reservoir by using iron-containing minerals - Google Patents
Method for determining fire flooding combustion temperature of heavy oil reservoir by using iron-containing minerals Download PDFInfo
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 140
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 69
- 239000011707 mineral Substances 0.000 title claims abstract description 69
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 36
- 239000000295 fuel oil Substances 0.000 title claims abstract description 22
- 235000010755 mineral Nutrition 0.000 claims abstract description 66
- 239000011435 rock Substances 0.000 claims abstract description 38
- 229910021646 siderite Inorganic materials 0.000 claims abstract description 33
- 238000001354 calcination Methods 0.000 claims abstract description 24
- 238000004458 analytical method Methods 0.000 claims abstract description 12
- 238000011160 research Methods 0.000 claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 10
- 239000011573 trace mineral Substances 0.000 claims abstract description 8
- 235000013619 trace mineral Nutrition 0.000 claims abstract description 8
- 230000008859 change Effects 0.000 claims abstract description 6
- 238000004445 quantitative analysis Methods 0.000 claims abstract description 3
- 229910052683 pyrite Inorganic materials 0.000 claims description 21
- 239000011028 pyrite Substances 0.000 claims description 21
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 claims description 21
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 18
- 239000011019 hematite Substances 0.000 claims description 13
- 229910052595 hematite Inorganic materials 0.000 claims description 13
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 claims description 13
- 238000013178 mathematical model Methods 0.000 claims description 6
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 2
- 229910052601 baryte Inorganic materials 0.000 claims description 2
- 239000010428 baryte Substances 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 claims description 2
- -1 titanomagnetite Chemical compound 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract 1
- 238000011161 development Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000006864 oxidative decomposition reaction Methods 0.000 description 3
- 229910052952 pyrrhotite Inorganic materials 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011158 quantitative evaluation Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052626 biotite Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052613 tourmaline Inorganic materials 0.000 description 1
- 239000011032 tourmaline Substances 0.000 description 1
- 229940070527 tourmaline Drugs 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/243—Combustion in situ
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/02—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Soil Sciences (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The invention provides a method for determining the fireflood combustion temperature of a heavy oil reservoir by using iron-containing minerals, which comprises the steps of carrying out a calcination test on a rock core of a target research area under different temperature conditions, carrying out whole-rock quantitative analysis on the rock core after the rock core is cooled, and obtaining the siderite content in the rock core and the relationship between the siderite content and the temperature under different calcination temperature conditions; carrying out heavy mineral analysis on the cooled rock core to determine the content of iron-containing minerals in the heavy minerals under different calcination temperature conditions and the relationship between the content of the iron-containing minerals and the temperature; analyzing the trace elements of the cooled rock core to determine the total iron and Fe in the iron-containing minerals under different calcining temperature conditions2+And Fe3+The contents and their respective temperature dependence; analysis ofEstablishing a core color code chart according to the change rule of the core color after cooling; according to the siderite content, the iron-containing mineral content, the total iron and the total Fe in the rock core2+And Fe3+And determining the combustion temperature of the heavy oil reservoir fireflood by one or more of the relationship between the content and the temperature and a core color code chart.
Description
Technical Field
The invention relates to a method for determining the fire flooding combustion temperature of a heavy oil reservoir by using iron-containing minerals, belonging to the technical field of petroleum development.
Background
Fire flooding is a thermal oil recovery method which generates heat in an oil layer, enables crude oil and injected air or oxygen to generate high-temperature oxidation reaction, releases a large amount of heat and gas, and displaces unburned crude oil to a production well for recovery. The method has no heat loss along the shaft, has the advantages of high recovery ratio, low cost and wide application range, and can be used as an effective replacing technology after the steam huff and puff of the heavy oil reservoir. In the process of fireflooding, the underground combustion temperature is determined, so that the fireflood combustion state (high-temperature combustion or low-temperature combustion) can be known, production adjustment and control can be carried out in time, and the method has great significance for oilfield fireflood development. The conventional fireflood temperature monitoring means is to arrange a thermocouple in a development well to monitor the temperature of an ignition well or a certain depth of the well, but the method has high cost and single monitoring object, and cannot monitor the temperature of the reservoir of each production interval of the fireflood.
Therefore, providing a novel method for determining the fire flooding combustion temperature of the heavy oil reservoir by using the iron-containing minerals has become an urgent technical problem to be solved in the field.
Disclosure of Invention
In order to solve the disadvantages and shortcomings, the invention aims to provide a method for determining the combustion temperature of a heavy oil reservoir fireflood by using iron-containing minerals. The method utilizes rock core data, develops indoor high-temperature physical simulation tests at different temperatures, comprehensively applies the relationship between the type and content of iron-containing minerals in rocks and the temperature under different temperature conditions, and establishes the method for determining the combustion temperature of the heavy oil reservoir fireflood by utilizing the iron-containing minerals. The method can be used for distinguishing the underground combustion temperature in the fireflood development process, and the determination of the combustion temperatures of different depths of fireflood sections is realized.
In order to achieve the above object, the present invention provides a method for determining the fireflood combustion temperature of a heavy oil reservoir by using iron-containing minerals, wherein the method comprises the following steps:
carrying out calcination tests on the rock core of the target research area under different temperature conditions, and carrying out total rock quantitative analysis on the rock core after the rock core is cooled to obtain the siderite content and the relationship between the siderite content and the temperature in the rock core under different calcination temperature conditions;
carrying out heavy mineral analysis on the cooled rock core to determine the content of iron-containing minerals in the heavy minerals under different calcination temperature conditions and the relationship between the content of the iron-containing minerals and the temperature;
analyzing the trace elements of the cooled rock core to determine the total iron and Fe in the iron-containing minerals under different calcining temperature conditions2+And Fe3+The contents and their respective temperature dependence;
analyzing the change rule of the color of the cooled rock core, and establishing rock core color code charts under different calcining temperature conditions;
according to the relationship between the siderite content in the core and the temperature, the relationship between the iron-containing mineral content in the heavy mineral and the temperature, and the total iron and Fe in the iron-containing mineral2+And Fe3+And determining the combustion temperature of the heavy oil reservoir fireflood by using the relationship between the content and the temperature and one or more of core color scale charts.
As a specific embodiment of the above method of the present invention, the method further includes: establishing Fe in iron-containing minerals under the conditions of different calcination temperatures3+A mathematical model of the relation between the content and the temperature, and Fe according to the mathematical model and the core Fe of the target research area3+And determining the fire flooding combustion temperature of the heavy oil reservoir in the target research area by the content.
In a specific embodiment of the above method of the present invention, the calcination temperature in the calcination test is 100 ℃ to 850 ℃.
As a specific embodiment of the above method of the present invention, the relationship between the siderite content in the core and the temperature includes:
when the temperature is lower than 350 ℃, the siderite content is stable, when the temperature is higher than 350 ℃, the siderite is oxidized and decomposed so that the siderite content is reduced, and when the temperature reaches 550 ℃, the siderite is completely decomposed and the siderite content is basically 0.
As an embodiment of the above method of the present invention, a relationship curve of siderite content and temperature in the core is established in the range of 350-550 ℃ with the temperature as the abscissa and the siderite content as the ordinate.
As a specific embodiment of the above method of the present invention, the iron-containing minerals include pyrite, barite, titanomagnetite, and hematite and limonite.
In the present invention, the heavy minerals include iron-containing minerals (e.g., FeS and FeS)2) Oxidative decomposition occurs during heating, the oxidative decomposition starting and ending temperatures of different iron-containing minerals are different, taking pyrite as an example, the pyrite is basically stable when the temperature is below 250 ℃, and when the temperature is higher than 250 ℃, the pyrite starts oxidative decomposition and the content thereof is gradually reduced. Thus, the fireflood combustion temperature can be determined by the iron-containing mineral content.
As a specific embodiment of the above method of the present invention, the relationship between the content of the iron-containing minerals in the heavy minerals and the temperature includes:
when the temperature is below 250 ℃, the content of the pyrite is stable, when the temperature is higher than 250 ℃, the pyrite starts to be oxidized and decomposed, the content of the pyrite is gradually reduced, and when the temperature reaches 550 ℃, the pyrite is completely oxidized, and the content is basically 0;
when the temperature is lower than 450 ℃, the content of the hematite and the limonite slightly changes, and when the temperature is higher than 450 ℃, the content of the hematite and the limonite sharply increases.
In the present invention, iron-containing minerals (such as pyrite, titanomagnetite, etc.) are easily oxidized during heating, and Fe2+Conversion of minerals to Fe3+And (4) minerals. Such as pyrite (FeS)2) Oxidation reaction is carried out under the action of high temperature to generate hematite (Fe)2O3) And SO2To form Fe in the core2+Reduced content of Fe3+The content is increased. Therefore, Fe in trace elements can be passed through2+Content and Fe3+And (4) determining the combustion temperature of the fireflood.
As a specific embodiment of the above method of the present invention, wherein the iron-containing mineral contains total iron and Fe2+And Fe3+The relationship between the content and the temperature comprises the following steps:
as the temperature rises, the total iron content in the rock iron-bearing mineral is kept constant, Fe2+With a gradually decreasing content of Fe3+The content gradually increases.
In the present invention, Fe is oxidized at high temperature3+The content is gradually increased to causeThe color of the rock changes, e.g. hematite (Fe)2O3) The increase in the content causes the core color to gradually change to yellow and orange. Thus, the fireflood combustion temperature can also be determined by rock color.
As a specific embodiment of the above method of the present invention, determining the fireflood combustion temperature of the heavy oil reservoir according to the core color scale chart includes:
determining that the color of the core is gradually changed from green gray to bright orange along with the temperature rise from the core color scale plate;
and determining the fire flooding combustion temperature of the heavy oil reservoir in the target research area according to the core color scale chart and the core color of the target research area.
The method provided by the invention utilizes core or well wall coring acquired by a coring well to analyze the relationship between the type and content of iron-containing minerals in a reservoir and the fireflood temperature, determine the combustion temperature of each interval in the longitudinal direction of each fireflood and recognize the sweep rule of a fire wire; the method provided by the invention can determine the fireflood temperatures of different depths and different intervals of the fireflood production well, the depth monitoring precision can reach centimeter level, the fireflood combustion temperature and the affected interval can be effectively determined, and the method has important significance for the evaluation of the fireflood development effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a graph showing the relationship between the siderite content and the temperature in example 1 of the present invention.
FIG. 2 is a graph showing the relationship between the content of iron-containing minerals in the heavy minerals and the temperature in example 1 of the present invention.
FIG. 3 shows total Fe and Fe in example 1 of the present invention2+Content and Fe3+Content versus temperature graph.
Detailed Description
In order to clearly understand the technical features, objects and advantages of the present invention, the following detailed description of the technical solutions of the present invention will be made with reference to the following specific examples, which should not be construed as limiting the implementable scope of the present invention.
Example 1
The embodiment provides a method for determining the fireflood combustion temperature of a heavy oil reservoir by using iron-containing minerals for a Liaohe oilfield D block, wherein the method comprises the following specific steps of:
the method comprises the following steps: indoor core high-temperature physical simulation test
Taking a certain amount of core of a research area, dividing the core into a plurality of parts, respectively carrying out calcination tests on the D block core of the Liaohe oilfield at 8 temperatures of 150 ℃, 250 ℃, 350 ℃, 450 ℃, 550 ℃, 650 ℃, 750 ℃ and 850 ℃ within the range of 100-850 ℃ by using a fire flooding physical simulation test device, and after the core is cooled, analyzing the types and the contents of iron-containing minerals in the calcined core at different temperatures.
Step two: core whole rock analysis
And analyzing the siderite content in the whole rock on the basis of the step one. The analysis result shows that when the temperature is lower than 350 ℃, the siderite content in the reservoir is relatively stable, and when the temperature is higher than 350 ℃, the siderite is oxidized and decomposed to generate Fe2O3And CO2So that the siderite content is reduced, and when the temperature is 550 ℃, the siderite is completely decomposed and the content is basically 0 (a graph of the relationship between the siderite mass percentage content and the temperature is shown in figure 1). Therefore, the siderite content and the temperature have good correlation within the range of 350-550 ℃, and can be used as a marker mineral for judging fire flooding high-temperature combustion.
Step three: analysis of heavy minerals
And (4) carrying out heavy mineral analysis on the basis of the first step and the second step to determine the content of the iron-containing minerals. The analysis result shows that: the land-source clastic minerals in the heavy minerals in the D-block reservoir are mainly zircon, tourmaline, agalmatolite, biotite garnet and titanomagnetite (FeTiO)3) And albeite, the authigenic mineral is mainly pyrite (FeS)2) Recrystallization of the crystalsHematite, hematite (Fe)2O3). Wherein, Fe2+Is transition metal, has strong chemical adsorption strength, is easy to adsorb oxygen molecules, and generates oxidation reaction to generate Fe3+And (4) minerals. The data analysis result shows that the content of the pyrite is stable when the temperature is below 250 ℃, the content of the pyrite is gradually reduced when the temperature is higher than 250 ℃, and the pyrite is completely oxidized and basically disappears when the temperature reaches 550 ℃. When the temperature is lower than 450 ℃, the content of the hematite and the limonite is slightly changed; when the temperature is higher than 450 ℃, the content of the hematite and the limonite is increased sharply. Therefore, the reservoir fire flooding temperature can be determined according to the content change of the pyrite and the limonite in the reservoir after the fire flooding. The graph of the relationship between the mass percentage of the iron-containing minerals in the heavy minerals and the temperature is shown in fig. 2.
Step four: analysis of trace elements
Carrying out trace element analysis on the basis of the first step, the second step and the third step to determine total iron and Fe2+And Fe3+And (4) content. Total iron (mass percent), Fe2+Mass percentage and Fe3+The graph of the relationship between the mass percentage and the temperature is shown in FIG. 3.
The trace element analysis result shows that the total iron content in the rock is basically kept unchanged and Fe is added along with the increase of the temperature2+Oxidation reaction occurs, the content is gradually reduced, and Fe3+The content gradually increases.
Step five: core color
And analyzing the color change rule of the rock core on the basis of the first step, the second step, the third step and the fourth step. Table 1 below is a color scale plot of the core after calcination at different temperatures, from which it can be seen that the core color gradually changes from green gray to bright orange as the temperature increases. In particular, pyrite (FeS) in the reservoir at temperatures below 350 ℃2) And oxidizing to generate pyrrhotite (FeS), wherein the pyrrhotite is dark black copper yellow, so that the core gradually transits from green gray in the original state to light yellow gray. Pyrrhotite is not easily detected because it is very unstable and easily oxidized to hematite and limonite. At temperatures above 350 ℃ with a reddish brown colourThe content of the hematite and the limonite is gradually increased, and the color of the core is gradually changed from yellow gray to bright orange. Through this experiment, D piece of burning core color code chart has been established, and the core is advanced the contrast with core color code chart after the fireflood, can infer the fireflood affected zone section temperature.
TABLE 1
Step six: establishing a mathematical model of the relationship between the iron-containing mineral content and the temperature
On the basis of the first step, the second step, the third step, the fourth step and the fifth step, the Matlab mathematical modeling software is utilized to establish Fe3+Content versus temperature mathematical model: t isZ＝-3349.3x3+10518x2-9589.2x +2960.9, in which Tz is temperature, expressed in ° c, and x is Fe3+The mass percentage of (B) is in%.
Step seven: heavy oil reservoir fire flooding combustion temperature discrimination
On the basis of the first step, the second step, the third step, the fourth step, the fifth step and the sixth step, according to the color of the reservoir rock after the fireflood, carrying out qualitative-semi-quantitative evaluation on the fireflood combustion temperature, and carrying out the quantitative evaluation on the trace element Fe in the iron-containing mineral of the reservoir rock core after the fireflood of the heavy oil reservoir to be analyzed3+And (5) substituting the content (0.95%) into the temperature discrimination mathematical model in the step six, and calculating to obtain the fireflood underground combustion temperature of 472 ℃.
In summary, the method provided by the embodiment of the invention utilizes core or wall coring acquired by the coring well to analyze the relationship between the type and content of iron-containing minerals in the reservoir and the fireflood temperature, determine the combustion temperature of each section in the longitudinal direction of each fireflood, and recognize the sweep law of the fire line; the method provided by the invention can determine the fireflood temperatures of different depths and different intervals of the fireflood production well, the depth monitoring precision can reach centimeter level, the fireflood combustion temperature and the affected interval can be effectively determined, and the method has important significance for the evaluation of the fireflood development effect.
The above description is only exemplary of the invention and should not be taken as limiting the scope of the invention, so that the invention is intended to cover all modifications and equivalents of the embodiments described herein. In addition, the technical features and the technical inventions of the present invention, the technical features and the technical inventions, and the technical inventions can be freely combined and used.
Claims (10)
1. A method for determining the fire flooding combustion temperature of a heavy oil reservoir by using iron-containing minerals is characterized by comprising the following steps:
carrying out calcination tests on the rock core of the target research area under different temperature conditions, and carrying out total rock quantitative analysis on the rock core after the rock core is cooled to obtain the siderite content and the relationship between the siderite content and the temperature in the rock core under different calcination temperature conditions;
carrying out heavy mineral analysis on the cooled rock core to determine the content of iron-containing minerals in the heavy minerals under different calcination temperature conditions and the relationship between the content of the iron-containing minerals and the temperature;
analyzing the trace elements of the cooled rock core to determine the total iron and Fe in the iron-containing minerals under different calcining temperature conditions2+And Fe3+The contents and their respective temperature dependence;
analyzing the change rule of the color of the cooled rock core, and establishing rock core color code charts under different calcining temperature conditions;
according to the relationship between the siderite content in the core and the temperature, the relationship between the iron-containing mineral content in the heavy mineral and the temperature, and the total iron and Fe in the iron-containing mineral2+And Fe3+And determining the combustion temperature of the heavy oil reservoir fireflood by using the relationship between the content and the temperature and one or more of core color scale charts.
2. The method of claim 1, further comprising: establishing Fe in iron-containing minerals under the conditions of different calcination temperatures3+Content versus temperature relationshipA mathematical model according to which the target study zone core Fe3+And determining the fire flooding combustion temperature of the heavy oil reservoir in the target research area by the content.
3. The method of claim 1, wherein the calcination temperature of the calcination test is in the range of 100 ℃ to 850 ℃.
4. The method according to claim 2, wherein the calcination temperature of the calcination test is 100 ℃ to 850 ℃.
5. The method of claim 1 or 2, wherein the relationship of siderite content in the core to temperature comprises:
when the temperature is lower than 350 ℃, the siderite content is stable, when the temperature is higher than 350 ℃, the siderite is oxidized and decomposed so that the siderite content is reduced, and when the temperature reaches 550 ℃, the siderite is completely decomposed and the siderite content is basically 0.
6. The method as claimed in claim 5, wherein the relationship between siderite content and temperature in the core is established in the range of 350-550 ℃ using temperature as abscissa and siderite content as ordinate.
7. The method according to claim 1 or 2, wherein the iron-containing minerals comprise pyrite, barite, titanomagnetite, hematite.
8. The method of claim 7, wherein the relationship of the iron-containing mineral content of the heavy minerals to temperature comprises:
when the temperature is below 250 ℃, the content of the pyrite is stable, when the temperature is higher than 250 ℃, the pyrite starts to be oxidized and decomposed, the content of the pyrite is gradually reduced, and when the temperature reaches 550 ℃, the pyrite is completely oxidized, and the content is basically 0;
when the temperature is lower than 450 ℃, the content of the hematite and the limonite slightly changes, and when the temperature is higher than 450 ℃, the content of the hematite and the limonite sharply increases.
9. The method of claim 1 or 2, wherein the iron-containing minerals contain total iron and Fe2+And Fe3+The relationship between the content and the temperature comprises the following steps:
as the temperature rises, the total iron content in the rock iron-bearing mineral is kept constant, Fe2+With a gradually decreasing content of Fe3+The content gradually increases.
10. The method according to claim 1 or 2, wherein determining the heavy oil reservoir fire flooding combustion temperature according to a core color scale chart comprises:
determining that the color of the core is gradually changed from green gray to bright orange along with the temperature rise from the core color scale plate;
and determining the fire flooding combustion temperature of the heavy oil reservoir in the target research area according to the core color scale chart and the core color of the target research area.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4369842A (en) * | 1981-02-09 | 1983-01-25 | Occidental Oil Shale, Inc. | Analyzing oil shale retort off-gas for carbon dioxide to determine the combustion zone temperature |
| CN103670356A (en) * | 2013-11-26 | 2014-03-26 | 里群 | Temperature-variable tracer composite for combustion in situ, distribution map of temperature fields of combustion in situ, production method of distribution map and development method of combustion in situ |
| CN104594887A (en) * | 2014-12-01 | 2015-05-06 | 中国石油天然气股份有限公司 | Reagent for detecting whether oil layer enters high-temperature oxidation stage or not, application and equipment |
| CN110924915A (en) * | 2019-10-21 | 2020-03-27 | 中国石油天然气股份有限公司 | Gravel heavy oil reservoir fire flooding front edge discrimination method |
-
2020
- 2020-10-29 CN CN202011179610.4A patent/CN112282745B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4369842A (en) * | 1981-02-09 | 1983-01-25 | Occidental Oil Shale, Inc. | Analyzing oil shale retort off-gas for carbon dioxide to determine the combustion zone temperature |
| CN103670356A (en) * | 2013-11-26 | 2014-03-26 | 里群 | Temperature-variable tracer composite for combustion in situ, distribution map of temperature fields of combustion in situ, production method of distribution map and development method of combustion in situ |
| CN104594887A (en) * | 2014-12-01 | 2015-05-06 | 中国石油天然气股份有限公司 | Reagent for detecting whether oil layer enters high-temperature oxidation stage or not, application and equipment |
| CN110924915A (en) * | 2019-10-21 | 2020-03-27 | 中国石油天然气股份有限公司 | Gravel heavy oil reservoir fire flooding front edge discrimination method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115142826A (en) * | 2021-03-30 | 2022-10-04 | 中国石油天然气股份有限公司 | Method for predicting heat release of thick oil combustion |
| CN115142826B (en) * | 2021-03-30 | 2023-12-22 | 中国石油天然气股份有限公司 | Prediction method for thickened oil combustion heat release quantity |
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