CN114086942B - Construction method of water layer identification chart of metamorphic rock down-the-hill in the Taigu kingdom at sea - Google Patents
Construction method of water layer identification chart of metamorphic rock down-the-hill in the Taigu kingdom at sea Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 239000011435 rock Substances 0.000 title claims abstract description 27
- 238000010276 construction Methods 0.000 title claims abstract description 9
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 52
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 52
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 52
- 238000005259 measurement Methods 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims description 25
- 238000012360 testing method Methods 0.000 claims description 19
- 239000012530 fluid Substances 0.000 claims description 15
- 238000011161 development Methods 0.000 claims description 13
- 238000005070 sampling Methods 0.000 claims description 12
- 238000004590 computer program Methods 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 4
- 238000012795 verification Methods 0.000 claims description 3
- 238000001506 fluorescence spectroscopy Methods 0.000 abstract 1
- 230000000704 physical effect Effects 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 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
- E21B47/00—Survey of boreholes or wells
- E21B47/001—Survey of boreholes or wells for underwater installation
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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
- E21B49/001—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 specially adapted for underwater installations
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
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Abstract
The invention relates to a construction method of a water layer identification plate of a metamorphic rock down-the-shelf mountain in the Taigu kingdom at sea, which comprises the following steps: counting the total hydrocarbon content of the gas measurement corresponding to each crack section of the target well and the fluorescence peak value in the three-dimensional fluorescence logging; dividing the total hydrocarbon content and the fluorescence peak value of each crack section by the porosity of the crack section to obtain a value of gas measurement total hydrocarbon content/porosity and a value of fluorescence peak value/porosity; drawing a gas measurement total hydrocarbon content/porosity-depth line graph and a fluorescence peak value/porosity-depth line graph, wherein the depth positions where the gas measurement total hydrocarbon content/porosity-depth line graph and the fluorescence peak value/porosity-depth line graph suddenly decrease are oil-water interfaces. The construction method of the identifying plate of the water layer of the downhill of the metamorphic rock in the Taigu kingdom at sea can utilize conventional gas logging data and three-dimensional fluorescence data to judge and identify the water layer of the downhill, so as to determine an oil-water interface.
Description
Technical Field
The invention relates to the technical field of petroleum exploration, in particular to a construction method of a water layer identification plate of a metamorphic rock down-the-hill of the deep Taigu kingdom at sea.
Background
In the development and research of the metamorphic rock-submersible mountain fractured hydrocarbon reservoir in the Taigu kingdom at sea, the water body has great influence on the development mode, well pattern deployment and the like of the metamorphic rock-submersible mountain hydrocarbon reservoir. However, the metamorphic rock type is mainly high-resistance minerals such as quartz and feldspar, and the resistivity curve is more of the response of the high-resistance rock, so that the fluid property cannot be well identified.
At present, the method for judging the fluid properties of the metamorphic rock and the down-the-country rock at sea mainly comprises the methods of DST test, PLT test, fluid sampling and the like. However, as the metamorphic rock down-the-hill reservoir is communicated up and down through the cracks, the DST test result cannot accurately judge the water outlet position if water is produced. PLT tests can identify and judge fluid interfaces, but are affected by factors such as offshore construction limitations, economy and the like, and the number of wells for PLT tests is limited, so that the requirements of oil field development scheme programming can not be met completely. The number of fluid samples is limited, meanwhile, the fluid samples can only reflect the fluid information of a certain point, and the accurate development position of the water layer cannot be determined. In summary, the existing methods for judging the fluid properties applied to the sea metamorphic rock down-the-road mountain have certain defects.
In order to accurately judge whether the development water layer and the development position of the water layer in the development scheme preparation stage, lay a foundation for the reserve utilization of the oil field of the submarine mountain, the well position deployment and the development mode selection, reduce the development risk and urgently establish a simple, convenient and rapid water layer judgment and identification method.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a method for constructing a map for identifying a water layer of a downhill water layer of metamorphic rock in the ancient Taigu kingdom at sea, which can judge and identify the water layer of the downhill water layer by utilizing conventional gas logging data and three-dimensional fluorescent data, thereby determining an oil-water interface, reducing the testing cost, improving the efficiency, providing geological basis for reserve utilization and well pattern deployment, and reducing the development risk.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the invention provides a construction method of a water layer identification plate of a metamorphic rock down-the-country in the ancient kingdom at sea, which comprises the following steps:
counting the total hydrocarbon content of the gas measurement corresponding to each crack section of the target well and the fluorescence peak value in the three-dimensional fluorescence logging;
dividing the total hydrocarbon content and the fluorescence peak value of each crack section by the porosity of the crack section to obtain a value of gas measurement total hydrocarbon content/porosity and a value of fluorescence peak value/porosity;
drawing a gas-measurement total hydrocarbon content/porosity-depth line graph, wherein the gas-measurement total hydrocarbon content/porosity is taken as an abscissa, and the depth is taken as an ordinate;
drawing a fluorescence peak value/porosity-depth line graph, wherein the fluorescence peak value/porosity is taken as an abscissa, and the depth is taken as an ordinate;
and determining the position of the water layer, wherein when the gas detection total hydrocarbon content/porosity-depth line graph and the fluorescence peak value/porosity-depth line graph are suddenly reduced, the depth positions corresponding to the reduced positions are the oil-water interface.
Further, the method further comprises the steps of: and verifying the oil-water interface.
Further, the verifying the oil-water interface includes the steps of:
selecting a key well, logging, testing and sampling the key well to obtain logging data and testing and sampling data, wherein the key well is tested or sampled to verify a development water layer and obtain an oil-water interface depth;
and if the depth of the oil-water interface obtained in the determined water layer position is consistent with the depth of the oil-water interface obtained by testing or sampling the key well, the verification is passed.
Further, the method includes counting log interpretation results of the target well.
Further, the logging interpretation results include a fracture section interpretation result, a tight section interpretation result, and a porosity of the fracture section.
Further, the fracture segment interpretation comprises a fluid interpretation.
Further, the fluid interpretation includes interpretation of oil, gas and water layers.
In a second aspect, the invention also provides a device for constructing a water layer identification plate of a metamorphic rock down-the-country in the ancient kingdom at sea, which comprises:
the first processing unit is used for counting the total hydrocarbon content of the gas measurement corresponding to each crack section of the target well and the fluorescence peak value in the three-dimensional fluorescence logging;
the second processing unit divides the total hydrocarbon content and the fluorescence peak value of each crack section by the porosity of the crack section to obtain a value of gas measurement total hydrocarbon content/porosity and a value of fluorescence peak value/porosity;
the third processing unit is used for drawing a gas-measurement total hydrocarbon content/porosity-depth line graph, wherein the gas-measurement total hydrocarbon content/porosity is taken as an abscissa, and the depth is taken as an ordinate; and drawing a fluorescence peak value/porosity-depth line graph, wherein the fluorescence peak value/porosity is taken as an abscissa, and the depth is taken as an ordinate;
and the fourth processing unit is used for determining the position of the water layer, and when the gas detection total hydrocarbon content/porosity-depth line graph and the fluorescence peak value/porosity-depth line graph are suddenly reduced, the depth positions corresponding to the reduced positions are the oil-water interface.
In a third aspect, the present invention further provides a computer readable storage medium storing a computer program, where the computer program is configured to implement the method for creating a map for identifying a water layer of metamorphic rock and a mountain in the sea when the computer program is executed by a processor.
In a fourth aspect, the invention also provides a computer device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor realizes the method for constructing the water layer identification pattern of the metamorphic rock and the down-the-hill water layer in the sea of the Taigu kingdom when executing the computer program.
Due to the adoption of the technical scheme, the invention has the following advantages: the invention provides a method for constructing a water layer identification chart of a buried hill water layer of a deep Taigu kingdom metamorphic rock buried hill condensate gas field at sea, which can judge and identify the buried hill water layer by utilizing conventional gas logging data and three-dimensional fluorescent data, so as to determine an oil-water interface, provide geological basis for reserve utilization and well pattern deployment, reduce development risk, reduce test cost and improve efficiency.
Drawings
FIG. 1 is a graph of the value-depth relationship of total hydrocarbon content/porosity for A3 well gas measurements;
FIG. 2 is a plot of fluorescence peak/porosity versus depth for the A3 well;
FIG. 3 is a graph of the value-depth relationship of total hydrocarbon content/porosity for the A4 well gas measurement;
FIG. 4 is a plot of fluorescence peak/porosity versus depth for the A4 well.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Moreover, the use of the terms first, second, etc. to define elements is merely for convenience in distinguishing the elements from each other, and the terms are not specifically meant to indicate or imply relative importance unless otherwise indicated.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The embodiment of the invention provides a method for identifying a water layer of a metamorphic rock down-the-road mountain in the sea of the Taigu kingdom, which comprises the following steps:
s1, selecting a key well, logging and testing and sampling the key well to obtain logging data and testing and sampling data, wherein the key well is tested or sampled to prove a developing water layer.
The key well is required to be provided with logging data and testing, sampling data, gas logging data, three-dimensional fluorescent logging data and testing or sampling data Ji Quandeng, wherein the logging data comprises fracture section and compact section interpretation results, the fracture section interpretation results comprise fluid interpretation results and physical property interpretation results, and the fluid interpretation results comprise oil layers, gas layers, water layers and the like; physical properties explain the results, such as porosity, permeability, etc. Meanwhile, the critical well is tested or sampled to verify the developing water layer.
S2, counting logging interpretation results of the target well, wherein the logging interpretation results comprise interpretation conclusions of fracture sections and tight zones, and the interpretation conclusions of the fracture sections comprise fluid interpretation conclusions, such as oil layers, gas layers, water layers and the like and porosity of reservoir sections;
s3, counting the total hydrocarbon content of the gas measurement corresponding to each fracture section (namely the reservoir section) and the fluorescence peak value in the three-dimensional fluorescence logging, wherein the total hydrocarbon content of the gas measurement corresponding to the compact zone and the fluorescence peak value in the three-dimensional fluorescence logging are not counted in the counting process;
s4, dividing the total hydrocarbon content of each crack section by the porosity of the crack section to obtain a value of the total hydrocarbon content/porosity of the gas measurement in order to eliminate the influence of physical properties, such as porosity, permeability and the like on the gas measurement;
s5, dividing the fluorescence peak value of each crack section by the porosity of the crack section to obtain a fluorescence peak value/porosity value in order to eliminate the influence of physical properties on the fluorescence peak value;
and S6, drawing a gas-measurement total hydrocarbon content/porosity-depth line graph, and taking the gas-measurement total hydrocarbon content/porosity as an abscissa and the depth as an ordinate to obtain a gas-measurement total hydrocarbon content/porosity value-depth line graph, wherein the gas-measurement total hydrocarbon content/porosity value-depth line graph is shown in FIG. 1.
And S7, drawing a fluorescence peak value/porosity-depth line graph, and obtaining the fluorescence peak value/porosity-depth line graph by taking the fluorescence peak value/porosity as an abscissa and the depth as an ordinate, wherein the fluorescence peak value/porosity-depth line graph is shown in FIG. 2.
S8, determining the position of the water layer, wherein the total hydrocarbon content and the fluorescence peak value of the oil layer are far larger than those of the water layer, finding the position where the total hydrocarbon content and the fluorescence peak value suddenly decrease in the gas measurement total hydrocarbon content/porosity-depth line graph and the fluorescence peak value/porosity-depth line graph, and judging that the depth position is possibly very large as an oil-water interface when the two parameter line graphs suddenly decrease and the depths corresponding to the decreasing positions are basically the same and coincide with the test or sampling results.
9) After verification of the critical well, the same method can be applied directly to other wells.
The method for constructing the map for identifying the water layer of the submerged mountain of the metamorphic rock in the ancient kingdom at sea can utilize the conventional gas logging data and the three-dimensional fluorescent data to judge and identify the water layer of the submerged mountain, so that an oil-water interface is determined.
Example 1
By adopting the method, the depth of an oil-water interface of a target well with the number A3 of 19-6 in Bohai sea is calculated, parameters such as the top depth, the total hydrocarbon content, the fluorescence peak value and the porosity are firstly obtained through logging and other means, then the total hydrocarbon content/porosity and the fluorescence peak value/porosity under different depth conditions are calculated, and then a line graph is obtained through data fitting, wherein the line graph is shown in the following figures 1 and 2. And finding out the position where the total hydrocarbon content and the fluorescence peak value are suddenly reduced simultaneously in the gas measurement total hydrocarbon content/porosity-depth line graph and the fluorescence peak value/porosity-depth line graph, and verifying to pass through when the two parameter line graphs suddenly reduce and the depth corresponding to the reduced position is basically the same and is 5229.8m, and the data are basically consistent with the key well test data.
Example 2
By adopting the method, the depth of an oil-water interface of a target well with the number A4 of 19-6 in Bohai sea is calculated, parameters such as the top depth, the total hydrocarbon content, the fluorescence peak value and the porosity are firstly obtained through logging and other means, then the total hydrocarbon content/porosity and the fluorescence peak value/porosity under different depth conditions are calculated, and then a line graph is obtained through data fitting, wherein the line graph is shown in the following figures 3 and 4. And finding the position where the total hydrocarbon content and the fluorescence peak value suddenly decrease simultaneously in the gas measurement total hydrocarbon content/porosity-depth line graph and the fluorescence peak value/porosity-depth line graph, wherein when the two parameter line graphs suddenly decrease and the depths corresponding to the decreasing positions are basically the same, the depth is 5065.7m.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The construction method of the water layer identification plate of the metamorphic rock down-the-shelf in the Taigu kingdom at sea is characterized by comprising the following steps:
counting the total hydrocarbon content of the gas measurement corresponding to each crack section of the target well and the fluorescence peak value in the three-dimensional fluorescence logging;
dividing the total hydrocarbon content and the fluorescence peak value of each crack section by the porosity of the crack section to obtain a value of gas measurement total hydrocarbon content/porosity and a value of fluorescence peak value/porosity;
drawing a gas-measurement total hydrocarbon content/porosity-depth line graph, wherein the gas-measurement total hydrocarbon content/porosity is taken as an abscissa, and the depth is taken as an ordinate;
drawing a fluorescence peak value/porosity-depth line graph, wherein the fluorescence peak value/porosity is taken as an abscissa, and the depth is taken as an ordinate;
and determining the position of the water layer, and when the gas detection total hydrocarbon content/porosity-depth line graph and the fluorescence peak value/porosity-depth line graph are suddenly reduced, the depth positions corresponding to the reduced positions with the same depth are oil-water interfaces.
2. The method for constructing the water layer identification plate of the sea Taigu metamorphic rock down-the-hill of the sea according to claim 1, further comprising the steps of: and verifying the oil-water interface position.
3. The method for constructing a water layer identification plate of a metamorphic rock down-the-shelf in the ancient tai kingdom at sea according to claim 2, wherein the verifying the oil-water interface position comprises the steps of:
selecting a key well, logging, testing and sampling the key well to obtain logging data and testing and sampling data, wherein the key well is tested or sampled to verify a development water layer and obtain an oil-water interface depth;
and if the depth of the oil-water interface obtained in the determined water layer position is consistent with the depth of the oil-water interface obtained by testing or sampling the key well, the verification is passed.
4. The method for constructing the water layer identification plate of the sea Taigu metamorphic rock down-the-hole mountain according to claim 1, wherein the method comprises the step of counting logging interpretation results of a target well.
5. The method for constructing the water layer identification plate of the sea-related Taigu metamorphic rock down-the-hill of the Taiggu kingdom according to claim 4, wherein the well logging interpretation results comprise a fracture section interpretation result, a compact section interpretation result and the porosity of the fracture section.
6. The method for constructing a water layer identification plate of a metamorphic rock down-the-hill at sea according to claim 5, wherein the fracture section interpretation conclusion comprises a fluid interpretation conclusion.
7. The method for constructing the water layer identification plate of the sea-related Taigu metamorphic rock down-the-hill of the Taigu kingdom according to claim 6, wherein the fluid interpretation conclusion comprises interpretation conclusion of an oil layer, an air layer and a water layer.
8. The utility model provides a marine taigu world metamorphic rock down-the-country water layer discernment drawing board construction device which characterized in that includes:
the first processing unit is used for counting the total hydrocarbon content of the gas measurement corresponding to each crack section of the target well and the fluorescence peak value in the three-dimensional fluorescence logging;
the second processing unit divides the total hydrocarbon content and the fluorescence peak value of each crack section by the porosity of the crack section to obtain a value of gas measurement total hydrocarbon content/porosity and a value of fluorescence peak value/porosity;
the third processing unit is used for drawing a gas-measurement total hydrocarbon content/porosity-depth line graph, wherein the gas-measurement total hydrocarbon content/porosity is taken as an abscissa, and the depth is taken as an ordinate; and drawing a fluorescence peak value/porosity-depth line graph, wherein the fluorescence peak value/porosity is taken as an abscissa, and the depth is taken as an ordinate;
and the fourth processing unit is used for determining the position of the water layer, and when the gas detection total hydrocarbon content/porosity-depth line graph and the fluorescence peak value/porosity-depth line graph are suddenly reduced, the depth positions with the same depth corresponding to the reduced positions are oil-water interfaces.
9. A computer-readable storage medium, wherein a computer program is stored, the computer program being configured to implement the method for creating a map of identifying a sea-related metamorphic rock-down hill water layer according to any one of claims 1 to 7 when executed by a processor.
10. A computer device comprising a memory, a processor and a computer program stored on the memory and running on the processor, wherein the processor, when executing the computer program, implements the method for creating a water layer identification map of a metamorphic rock-down hill at sea according to any one of claims 1 to 7.
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