CN112211618B - Method and device for acquiring height of oil column - Google Patents
Method and device for acquiring height of oil column Download PDFInfo
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- CN112211618B CN112211618B CN201910553664.3A CN201910553664A CN112211618B CN 112211618 B CN112211618 B CN 112211618B CN 201910553664 A CN201910553664 A CN 201910553664A CN 112211618 B CN112211618 B CN 112211618B
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Abstract
The invention provides a method and a device for acquiring the height of an oil column, wherein the method comprises the following steps: firstly, obtaining the static temperature T corresponding to the preset depth in the well to be measured before or at the initial stage of production 1 The method comprises the steps of carrying out a first treatment on the surface of the Then obtaining the flow temperature T corresponding to the preset depth in the well after the production of the oil well to be tested is started for a preset period 2 A ground temperature gradient t; finally according to the flow temperature T 2 Said static temperature T 1 The method for acquiring the height of the oil column of the oil well to be measured has strong operability, the acquired result of the height of the oil column of the oil well to be measured is accurate, the method has strong guidance on oil reservoir development, the purpose of accurately acquiring the height of the oil column of the carbonate oil reservoir is achieved, and the technical problem that the accuracy of the value of the height of the oil column of the carbonate oil reservoir is low in the prior art is solved.
Description
Technical Field
The invention relates to the technical field of oil field reservoir engineering, in particular to a method and a device for acquiring oil column height.
Background
The carbonate reservoir oil column height refers to the vertical distance from the bottom boundary to the top boundary of oil in the reservoir, and is an important parameter for judging the size of the reservoir and calculating the reservoir reserves. The accuracy of the carbonate reservoir oil column height has extremely important significance for calculating the reservoir reserve, which is an important parameter for judging the potential of an oil well and guiding later development, so how to obtain a more accurate oil column height is an important subject for the research of oil reservoir researchers.
At present, the height of the carbonate reservoir oil column is judged in the industry by adopting a carving method and a reference adjacent well, but the accuracy of judging the height of the carbonate reservoir oil column by adopting the carving method and the reference adjacent well is often not high, so that the accuracy of reservoir reserve calculation can be influenced. Specifically, the carving method is difficult to deduct the influence of stratum water body when judging the height of the oil column, the height of the oil column is usually larger, and the error is larger when the method of referencing the adjacent well due to the extremely strong heterogeneity of the carbonate reservoir.
Thus, for carbonate reservoirs, a method is needed that can accurately obtain the height of the carbonate reservoir oil column.
Disclosure of Invention
The invention provides a method and a device for acquiring the height of an oil column, which solve the technical problem of low accuracy of the value of the height of the oil column of a carbonate reservoir in the prior art.
In a first aspect, an embodiment of the present invention provides a method for acquiring an oil column height, including:
acquiring static temperature T corresponding to preset depth in an oil well to be tested before or at the initial stage of production 1 ；
Acquiring a flow temperature T corresponding to the preset depth in the well after the production of the oil well to be tested is started for a preset period 2 And a ground temperature gradient t, wherein the ground temperature gradient t is an elevation value of the temperature of each 100m of stratum deepening;
according to the flow temperature T 2 Said static temperature T 1 And determining the oil reservoir oil column height of the oil well to be tested by the ground temperature gradient t.
The method for acquiring the oil column height as described above, optionally, the step of acquiring the geothermal gradient t in the well after the production scheduled period of the oil well to be tested includes:
acquiring flow temperature data corresponding to different well depths in the well after the oil well to be tested is put into production for a preset period;
and obtaining the ground temperature gradient t according to the flow temperature data and the different well depths.
The method for obtaining the oil column height as described above, optionally, the obtaining the ground temperature gradient t according to the flow temperature data and the different well depths includes:
performing linear fitting by taking the flow temperature data as an abscissa and the different well depths as an ordinate to obtain a flow temperature linear fitting line;
and obtaining the ground temperature gradient t according to the slope of the flow temperature linear fitting line.
The method for acquiring the oil column height as described above, optionally, comprises acquiring the preset depth in the well after the production of the oil well to be tested for a preset periodCorresponding flow temperature T 2 Comprising:
obtaining the flow temperature T corresponding to the preset depth according to a fitting formula corresponding to the flow temperature linear fitting line 2 。
The method for acquiring the height of the oil column comprises the following steps of, optionally, according to the flow temperature T 2 Said static temperature T 1 And determining the oil reservoir oil column height of the oil well to be measured by the ground temperature gradient t, wherein the method comprises the following steps:
the height of the reservoir oil column of the oil well to be measured is determined by adopting the following formula:
h＝100×(T 2 －T 1 )/t，
wherein h is the height of an oil reservoir oil column, and T is 2 For the flow temperature, T is 1 And the temperature is static temperature, and t is the ground temperature gradient.
The method for acquiring the oil column height as described above, optionally, the acquiring flow temperature data corresponding to different depths in the well after the predetermined period of production of the oil well to be measured includes:
carrying out a flow temperature flow pressure gradient test on the oil well to be tested after a production scheduled period;
and obtaining flow temperature data corresponding to different well depths in the well according to the flow temperature and flow pressure gradient test.
According to the method for acquiring the oil column height, the static temperature T corresponding to the preset depth in the well before or at the initial stage of production of the oil well to be detected is optionally acquired 1 Comprising:
acquiring static temperature data corresponding to different well depths in the well before or at the beginning of production of the oil well to be measured;
performing linear fitting on the static temperature data as an abscissa and the different well depths as an ordinate to obtain a static temperature linear fitting line;
obtaining the static temperature T corresponding to the preset depth in the well according to a fitting formula corresponding to the static temperature linear fitting line 1 。
The method for acquiring the oil column height as described above, optionally, the acquiring the static temperature data corresponding to different depths in the well before or during the initial production of the oil well to be measured includes:
carrying out static temperature and static pressure gradient test on the oil well to be tested before or at the initial stage of production;
and obtaining static temperature data corresponding to different well depths in the well according to the static temperature and static pressure gradient test.
In the method for obtaining the oil column height, optionally, the preset depth is a middle depth of a production layer, and the middle depth of the production layer is a middle depth of a contact position between a bottom hole and the production layer in the well.
In a second aspect, an embodiment of the present invention provides an oil column height acquiring apparatus for performing the above-described acquiring method, where the apparatus includes:
the system comprises a thermometer with a signal remote transmission function, a pressure gauge, a time timer, a display unit and a processing unit, wherein the thermometer is used for obtaining temperature values of different well depths in a well;
the display unit is connected with the processing unit, and the processing unit is used for performing fitting on the static temperature and the flow temperature obtained by the thermometer and the well depth corresponding to the static temperature and the flow temperature to respectively obtain a static temperature linear fitting line and a flow temperature linear fitting line, obtaining the static temperature corresponding to the preset depth according to the static temperature linear fitting line, obtaining the flow temperature corresponding to the preset depth and the ground temperature gradient according to the flow temperature linear fitting line, and obtaining the reservoir oil column height of the oil well to be tested according to the ground temperature gradient and the static temperature and the flow temperature corresponding to the preset depth;
the display unit is used for displaying the static temperature linear fitting line, the flow temperature linear fitting line and the reservoir oil column height.
The invention provides a method and a device for acquiring the height of an oil column, wherein the method comprises the following steps: firstly, obtaining the static temperature T corresponding to the preset depth in the well to be measured before or at the initial stage of production 1 The method comprises the steps of carrying out a first treatment on the surface of the Secondly, obtaining the flow temperature T corresponding to the preset depth in the well after the production scheduled period of the oil well to be tested 2 And a ground temperature gradient t, wherein the ground temperature gradient t is an elevation value of the temperature of each 100m of stratum deepening; finally according to the instituteThe flow temperature T 2 Said static temperature T 1 And determining the oil reservoir oil column height of the oil well to be tested by the ground temperature gradient t. Therefore, the method for acquiring the height of the oil column provided by the embodiment of the invention passes through the flow temperature T 2 Said static temperature T 1 And the ground temperature gradient t can accurately determine the height of the oil reservoir oil column of the oil well to be measured, so that the method has strong operability, the obtained result of the height of the oil reservoir oil column is accurate, the method has strong guidance on oil reservoir development, the purpose of accurately obtaining the height of the oil reservoir oil column of the carbonate reservoir is realized, and the technical problem of low accuracy of the value of the height of the oil reservoir oil column of the carbonate reservoir in the prior art is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
Fig. 1 is a flow chart of a method for acquiring a height of an oil column according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the height of an oil column according to a first embodiment of the present invention;
FIG. 3 is a flow chart of a method for obtaining a geothermal gradient of an oil well to be tested after a predetermined period of production in accordance with the second embodiment of the present invention;
fig. 4 is a flow chart of a method for obtaining static temperature of an oil well to be tested before or at the initial stage of production according to the second embodiment of the present invention;
FIG. 5 is a line graph of a stationary temperature linear fit line provided by a second embodiment of the present invention;
fig. 6 is a line graph of a linear fit line for flow temperature according to a second embodiment of the present invention.
The attached drawings are used for identifying and describing:
1-an oil well to be tested;
2-depth of middle of the producing zone.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present 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 order to have a certain guidance before the development of the carbonate reservoir, the size of the reservoir is required to be judged and the reservoir reserve is required to be calculated, and the height of the oil column of the carbonate reservoir is an important parameter for judging the size of the reservoir and calculating the reservoir reserve. At present, an engraving method and a reference adjacent well are generally adopted for judging the height of the carbonate reservoir oil column in the industry, but the engraving method is difficult to deduct the influence of stratum water body when judging the height of the oil column, the height of the oil column is usually larger, the accuracy of reservoir reserve calculation is influenced, and because the heterogeneity of the carbonate reservoir is extremely strong, larger errors often exist when judging the height of the oil column by referring to the adjacent well. Therefore, in order to achieve accurate acquisition of the height of the oil column of the carbonate reservoir, the embodiment of the invention provides an oil column height acquisition method and device.
Example 1
Fig. 1 is a flow chart of a method for obtaining a height of an oil column according to an embodiment of the present invention, and fig. 2 is a schematic diagram of a height of an oil column according to an embodiment of the present invention.
The method for acquiring the height of the oil column can be used for acquiring the height of the oil column of an oil field oil reservoir, is particularly suitable for acquiring the height of the oil column of a carbonate oil reservoir, achieves the aim of accurately acquiring the height of the oil column of the carbonate oil reservoir, and solves the technical problem that the accuracy of the value of the height of the oil column of the carbonate oil reservoir is low in the prior art.
As shown in fig. 1, a method for acquiring the height of an oil column includes:
step S101: obtaining to-be-testedStatic temperature T corresponding to preset depth in oil well 1 before or at the beginning of production 1 ；
Step S102: acquiring the flow temperature T corresponding to the preset depth in the well after the production of the oil well 1 to be tested for a preset period 2 And a ground temperature gradient t, wherein the ground temperature gradient t is an elevation value of the temperature of each 100m of stratum deepening;
step S103: according to the flow temperature T 2 Static temperature T 1 And determining the reservoir oil column height h of the oil well 1 to be tested by the ground temperature gradient t.
In this example, the static temperature is the wellbore temperature measured in the state where the oil well is stationary, and the wellbore temperature, i.e., the static temperature, also represents the surrounding formation temperature because the oil well is stationary.
In this embodiment, it should be noted that, the flow temperature is the wellbore temperature measured by the oil well in the flowing state, and for the oil production well, the fluid flowing out of the stratum is not enough to be dissipated in the wellbore, but is extracted from the ground, so that the flow temperature measured by the same depth of the producing zone is greater than the static temperature, and the static temperature and flow temperature gradient curve contrast analysis is generally used on the mine to judge the producing horizon and the water absorbing horizon; because the temperature of the oil reservoir is related to the burial depth and the ground temperature gradient, the embodiment obtains the static temperature T corresponding to the preset depth of the oil well to be measured 1 Stream temperature T corresponding to preset depth 2 And the ground temperature gradient t, according to the ground temperature gradient t, the oil column height of the oil reservoir can be accurately obtained or predicted.
In this embodiment, the preset depth is the middle depth 2 of the producing zone, and in this embodiment, the middle depth 2 of the producing zone is the middle depth of the contact position between the bottom of the well and the producing zone, in other words, the middle depth 2 of the producing zone is one middle depth of the upper and lower interfaces where the bottom of the well contacts the producing zone, and for the well of carbonate rock, this depth can be understood as the depth of the bottom of the well.
In this embodiment, the predetermined period may be 6 months of production of the oil well to be tested, or 7 months of production of the oil well to be tested or other production month number, that is, in this embodiment, the predetermined period includes, but is not limited to, 6 months of production of the oil well to be tested.
The formation temperature (ground temperature) increases with the depth. According to the change of the underground temperature, the crust is often divided into three zones: a temperature changing belt, a constant temperature belt and a temperature increasing belt. In order to study the change rule of the stratum temperature along with the depth, two concepts of the ground temperature gradient and the ground temperature level are commonly used. The formation temperature has important effects on the generation, migration, aggregation and the like of oil gas, and also has non-negligible influence on the physical properties of oil, gas, water and rock. The deeper the stratum is, the deeper the corresponding stratum temperature is, and when the fluid flowing out of the production layer is in the rising process, the heat dissipation in the shaft is insufficient, so that the measured fluid temperature at the position corresponding to the same production layer depth is larger than the measured static temperature at the position corresponding to the same production layer depth.
It should be noted that, as shown in fig. 2, when the preset depth is the depth of the middle of the producing zone, the temperature change of the well bore corresponding to the same position of the depth of the producing zone (the depth of the middle of the producing zone) can obtain the height of the fluid flowing out of the corresponding producing zone when the temperature of the well bore at the same corresponding position changes by the amount (the difference between the flowing temperature and the static temperature of the same depth), and the depth of the middle of the producing zone in this embodiment is one middle depth of the upper and lower interfaces where the bottom of the well contacts with the producing zone, and for the well of carbonate rock, the depth can be understood as the depth of the bottom of the well. For carbonate rock, because the lower pressure of the production layer is higher, the elastic energy is stronger, after a pressure release channel (namely the bottom of an oil well is communicated with the production layer), namely after the oil well is put into production, oil at the bottom of the production layer can preferentially go to the bottom of the well to form a dominant channel, the oil can conically rise, and the structure of the production layer of the carbonate rock is very complex, so that after the crude oil at the bottom of the production layer flows upward to form the dominant channel, the process can last for a long time, and therefore, the change of temperature can be monitored after the preset period of production. As shown in fig. 2, the present embodiment can obtain the rising height of crude oil at the bottom of the production zone (i.e. the height of the oil column along the carbonate edge in the present embodiment) when the temperature change (the difference between the flowing temperature and the static temperature at the bottom depth of the well) can occur according to the ratio of the difference between the flowing temperature and the static temperature of the well at the bottom of the well (i.e. the middle part of the production zone of the carbonate rock in the present embodiment) to the ground temperature gradient, so that the present embodiment can accurately budget the height of the oil column according to the flowing temperature, the static temperature and the ground temperature gradient at the bottom of the well.
Therefore, the invention provides a method and a device for acquiring the height of an oil column, wherein the method comprises the following steps: firstly, obtaining the static temperature T corresponding to the preset depth in the well before or at the initial stage of production of the oil well 1 to be measured 1 The method comprises the steps of carrying out a first treatment on the surface of the Secondly, acquiring the flow temperature T corresponding to the preset depth in the well after the production preset period of the oil well to be tested 2 And a ground temperature gradient t, wherein the ground temperature gradient t is an elevation value of the temperature of each 100m of stratum deepening; finally according to the flow temperature T 2 Static temperature T 1 And determining the oil reservoir column height of the oil well to be tested by the ground temperature gradient t. Therefore, the method for acquiring the height of the oil column provided in the embodiment passes through the flow temperature T 2 Static temperature T 1 And the ground temperature gradient t can accurately determine the height of the oil reservoir oil column of the oil well to be measured, so that the method has strong operability, the obtained result of the height of the oil reservoir oil column is accurate, the method has strong guidance on oil reservoir development, the purpose of accurately obtaining the height of the oil reservoir oil column of the carbonate reservoir is realized, and the technical problem of low accuracy of the value of the height of the oil reservoir oil column of the carbonate reservoir in the prior art is solved.
Example two
Fig. 3 is a schematic flow chart of a method for obtaining a ground temperature gradient of an oil well to be measured after a production scheduled period according to the second embodiment of the present invention, fig. 4 is a schematic flow chart of a method for obtaining a static temperature of the oil well to be measured before or at an initial stage of production according to the second embodiment of the present invention, fig. 5 is a line graph of a static temperature linear fit line according to the second embodiment of the present invention, and fig. 6 is a line graph of a flow temperature linear fit line according to the second embodiment of the present invention.
Further, based on the above embodiment, as shown in fig. 3, in this embodiment, obtaining the geothermal gradient t in the well after the production scheduled period of the oil well to be measured includes:
step S104: acquiring flow temperature data corresponding to different well depths in an oil well to be tested after a production scheduled period;
step S105: and obtaining the ground temperature gradient t according to the flow temperature data and different well depths.
In this embodiment, it should be noted that, according to different well depths in the well after the production of the oil well to be measured in a predetermined period and flow temperature data corresponding to the different well depths, a change rule of flow temperature along with the change of the well depths may be obtained, so as to obtain an increase value of the temperature of each 100m of the stratum, that is, a ground temperature gradient t.
In this embodiment, as shown in fig. 3, obtaining the geothermal gradient t according to the flow temperature data and different well depths includes:
step a: performing linear fitting by taking the flow temperature data as an abscissa and different well depths as an ordinate to obtain a flow temperature linear fitting line;
step b: and obtaining the ground temperature gradient t according to the slope of the flow temperature linear fitting line.
In this embodiment, a line graph is made with different well depths as ordinate and flow temperatures as abscissa for the obtained flow temperature data and different well depth data, linear fitting is performed on the higher end of the line graph to obtain a linear fitting formula, the flow temperature linear fitting line obtained by fitting can obtain a change rule of temperature along with depth, and the flow temperature T in the middle of the production zone can be obtained according to the middle depth 2 of the production zone of the corresponding oil well 2 Whereas the slope of the fitted equation for the flow temperature linear fit line is 100 times the ground temperature gradient t.
It should be noted that, the linear fitting of the obtained flow temperature data and the different well depth data is in the prior art, and may be performed by using some data processing software, which is not further described in this embodiment.
In this embodiment, the flow temperature T corresponding to the preset depth in the well after the production scheduled period of the oil well to be measured is obtained 2 Comprising:
obtaining the flow temperature T corresponding to the preset depth according to a fitting formula corresponding to the flow temperature linear fitting line 2 。
It should be noted that, the flow temperature T corresponding to the preset depth can be obtained by substituting the preset depth value into the fitting formula corresponding to the linear fitting line of the flow temperature 2 Flow temperature T 2 The method is obtained by prediction according to a fitting formula of a linear fitting line of the flow temperature.
Wherein, the embodimentIn accordance with the flow temperature T 2 Static temperature T 1 And determining the reservoir oil column height of the oil well to be measured by the ground temperature gradient t, comprising:
the height of the reservoir oil column of the oil well to be measured is determined by adopting the following formula:
h＝100×(T 2 －T 1 )/t，
wherein h is the height of an oil reservoir oil column, T 2 Is the flow temperature, T 1 The static temperature and t is the ground temperature gradient.
It should be noted that, as shown in fig. 2, the preset depth may be a depth corresponding to the depth 2 of the middle zone of the oil well 1 to be measured, and the flow temperature T 2 Static temperature T 1 The temperature of the well corresponding to the middle depth of the producing layer in the well 1 to be measured is in different states, the heat dissipation in the well bore is insufficient in the rising process of the fluid flowing out of the producing layer, namely, the measured flow temperature is the well bore temperature measured by the well in the flowing state, the static temperature represents the well bore temperature measured by the well in the static state and also represents the surrounding stratum temperature, so that the rising height of the fluid flowing out of the producing layer corresponding to the temperature of the well bore at the same corresponding position corresponding to the same producing layer depth (the middle depth 2 of the producing layer) can be obtained through the temperature change of the well bore at the corresponding position, namely, the height of the oil column.
In this embodiment, it should be noted that, because the on-site actual measurement of the temperature in the oil well to be measured is performed by pulling the wire (e.g. steel wire) into the oil pipe of the oil well with the temperature measuring device (e.g. thermometer), however, the depth of the oil pipe in the oil well is not in the border, if the on-site measurement method is used to perform the temperature of the middle depth of the oil well to be measured, the position of the temperature measuring device will be shallower than the actual position of the middle depth of the oil well to be measured, which may cause a certain error, and affect the final obtained result of the oil column height.
In this embodiment, as shown in fig. 3, obtaining flow temperature data corresponding to different well depths in a well to be measured after a production scheduled period includes:
step c: carrying out a flow temperature and pressure gradient test on the oil well to be tested after the production scheduled period;
step d: and obtaining flow temperature data corresponding to different well depths in the well according to the flow temperature and flow pressure gradient test.
In this embodiment, the predetermined period may be 6 months of production, and the flow temperature, flow pressure and gradient test includes measuring different depths of the well bore and temperatures of the well bore point by point in a flowing state of the oil well to obtain different depths of the well bore and corresponding flow temperature data thereof.
In this embodiment, as shown in fig. 4, a static temperature T corresponding to a preset depth in the well to be measured is obtained before or during the initial production period of the well to be measured 1 Comprising:
step S106: acquiring static temperature data corresponding to different well depths in an oil well to be tested before or at the beginning of production;
step S107: performing linear fitting on the static temperature data as an abscissa and different well depths as an ordinate to obtain a static temperature linear fitting line;
step S108: obtaining the static temperature T corresponding to the preset depth in the well according to a fitting formula corresponding to the static temperature linear fitting line 1 。
In this embodiment, the obtained static temperature data and different well depth data are plotted with different well depths as ordinate and static temperature as abscissa, and linear fitting is performed on the higher temperature end of the plot to obtain a linear fitting formula, the change rule of the static temperature along with the depth can be obtained by fitting the obtained static temperature linear fitting line, and the static temperature T in the middle of the production zone can be obtained according to the depth in the middle of the production zone of the corresponding oil well 1 . Similarly, the obtained static temperature data and different well depth data are linearly fitted as in the prior art, and may be fitted by using some data processing software, which is not further described in this embodiment.
In this embodiment, obtaining static temperature data corresponding to different well depths in an oil well to be measured before or during an initial production stage includes:
step e: carrying out static temperature static pressure gradient test on the oil well to be tested before or at the initial stage of production;
step f: and obtaining static temperature data corresponding to different well depths in the well according to a static temperature and static pressure gradient test.
In this embodiment, the static temperature and static pressure gradient test includes measuring different depths of a well and corresponding temperatures of the well point by point in a static state of the well to obtain different depths of the well and corresponding static temperature data thereof, and it should be noted that the static temperature and static pressure gradient test is in the prior art, and in this embodiment, further description thereof is omitted.
Examples: taking 7237.55m as an example of the depth of the middle part of a production layer of a certain oil well to be measured
Taking 7237.55m as an example of the depth 2 of the middle part of a production layer of a certain oil well 1 to be measured, the method for obtaining the height of an oil column comprises the following steps: static temperature and static pressure gradient test is carried out on the oil well 1 to be tested before or at the beginning of production, the well depth range is 0-7100m, static temperature data corresponding to different well depths of the oil well 1 to be tested are measured, the static temperature data are taken as abscissa, different well depths are taken as ordinate, a line diagram is taken as ordinate, linear fitting is carried out on the higher end (circled position in fig. 5) of the temperature of the line diagram to obtain a linear fitting formula, as shown in fig. 5, the fitting formula for obtaining the static temperature linear fitting line is T=0.0182h+18.5004, the depth 7237.55m of a production layer part is brought into the formula T=0.0182h+18.5004, and the depth temperature T of the middle part of the production layer can be calculated 1 ＝150.22℃；
Carrying out a flow temperature and flow pressure gradient test on the oil well to be tested after 6 months before production, wherein the range of the well depth is 0-7100m, measuring flow temperature data corresponding to different well depths of the oil well to be tested, taking the flow temperature data as an abscissa and the different well depths as an ordinate as a line diagram, carrying out linear fitting on the higher end (circled position in FIG. 6) of the line diagram to obtain a linear fitting formula, and obtaining the fitting formula of the linear fitting line of the flow temperature as shown in FIG. 6, wherein the fitting formula of the linear fitting line of the flow temperature is T=0.0084 h+94.93, h is 6400-7100m, and the depth 7237.55m of the production zone is brought into the formula, so that the depth temperature T of the middle part of the production zone can be calculated 2 = 155.73 ℃, while the ground temperature gradientt=0.84 ℃/m, according to the formula h=100× (T 2 －T 1 ) And/t, the height of the oil column of the oil well to be detected is 655.95m.
Example III
Further, on the basis of the above embodiment, the present embodiment provides an oil column height acquiring device, which is configured to execute the above acquiring method, where the device includes:
the system comprises a thermometer with a signal remote transmission function, a pressure gauge, a time timer, a display unit and a processing unit, wherein the thermometer is used for obtaining temperature values of different well depths in a well;
the display unit is connected with the processing unit, and the processing unit is used for fitting the static temperature and the flow temperature obtained by the thermometer and the well depth corresponding to the static temperature and the flow temperature to respectively obtain a static temperature linear fitting line and a flow temperature linear fitting line, obtaining the static temperature corresponding to the preset depth according to the static temperature linear fitting line, obtaining the flow temperature corresponding to the preset depth and the ground temperature gradient according to the flow temperature linear fitting line, and obtaining the oil reservoir oil column height of the oil well to be tested according to the ground temperature gradient and the static temperature and the flow temperature corresponding to the preset depth;
the display unit is used for displaying the static temperature linear fitting line, the flow temperature linear fitting line and the oil reservoir oil column height.
In this embodiment, the manometer is used for obtaining different depth values in the well, obtains static temperature data and flow temperature data that the different depths of the oil well that awaits measuring correspond respectively through thermometer and manometer, and the fitting of data of being convenient for, and wherein manometer and thermometer link to each other with processing unit for send the data that obtain to processing unit, processing unit carries out final demonstration through display unit after the data fitting that will obtain, is convenient for the staff's of looking over.
In this embodiment, the time timer is connected to the processor, and displays the corresponding time through the display unit.
In this embodiment, the processor may be a single chip microcomputer, or may be other devices with control, calculation and control functions. The display unit includes, but is not limited to, a display.
Embodiments of the present invention provideBy the flow temperature T 2 Said static temperature T 1 And the ground temperature gradient t can accurately determine the height of the oil reservoir oil column of the oil well to be measured, so that the method has strong operability, the obtained result of the height of the oil reservoir oil column is accurate, the method has strong guidance on oil reservoir development, the purpose of accurately obtaining the height of the oil reservoir oil column of the carbonate reservoir is realized, and the technical problem of low accuracy of the value of the height of the oil reservoir oil column of the carbonate reservoir in the prior art is solved.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the terms "comprises" and "comprising," and any variations thereof, as used herein, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements that are expressly listed or inherent to such process, method, article, or apparatus.
Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can lead the interior of two elements to be communicated or lead the two elements to be in interaction relationship. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; 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 or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (9)
1. The method for acquiring the height of the oil column is characterized by comprising the following steps of:
acquiring static temperature T corresponding to preset depth in an oil well to be tested before or at the initial stage of production 1 ；
Acquiring a flow temperature T corresponding to the preset depth in the well after the production of the oil well to be tested is started for a preset period 2 And a ground temperature gradient t, wherein the ground temperature gradient t is an elevation value of the temperature of each 100m of stratum deepening;
according to the flow temperature T 2 Said static temperature T 1 Determining the oil reservoir oil column height of the oil well to be tested by the ground temperature gradient t;
said temperature T according to said flow 2 Said static temperature T 1 And determining the oil reservoir oil column height of the oil well to be measured by the ground temperature gradient t, wherein the method comprises the following steps:
the height of the reservoir oil column of the oil well to be measured is determined by adopting the following formula:
h＝100×(T 2 －T 1 )/t，
wherein h is the height of an oil reservoir oil column, and T is 2 For the flow temperature, T is 1 And the temperature is static temperature, and t is the ground temperature gradient.
2. The method for acquiring the oil column height according to claim 1, wherein the step of acquiring the ground temperature gradient t in the well after the production scheduled period of the oil well to be tested comprises the steps of:
acquiring flow temperature data corresponding to different well depths in the well after the oil well to be tested is put into production for a preset period;
and obtaining the ground temperature gradient t according to the flow temperature data and the different well depths.
3. The method for obtaining the oil column height according to claim 2, wherein the obtaining the ground temperature gradient t according to the flow temperature data and the different well depths comprises:
performing linear fitting by taking the flow temperature data as an abscissa and the different well depths as an ordinate to obtain a flow temperature linear fitting line;
and obtaining the ground temperature gradient t according to the slope of the flow temperature linear fitting line.
4. The method for obtaining the height of an oil column according to claim 3, wherein the obtaining the flow temperature T corresponding to the preset depth in the well after the production of the oil well to be measured is performed for a preset period 2 Comprising:
obtaining the flow temperature T corresponding to the preset depth according to a fitting formula corresponding to the flow temperature linear fitting line 2 。
5. The method for obtaining the oil column height according to any one of claims 2 to 4, wherein the obtaining the flow temperature data corresponding to different depths in the well after the production scheduled period of the oil well to be measured comprises:
carrying out a flow temperature flow pressure gradient test on the oil well to be tested after a production scheduled period;
and obtaining flow temperature data corresponding to different well depths in the well according to the flow temperature and flow pressure gradient test.
6. The method for obtaining the height of an oil column according to any one of claims 1 to 4, wherein the obtaining the oil well to be measured corresponds to a preset depth in the well before or at an initial stage of productionStatic temperature T 1 Comprising:
acquiring static temperature data corresponding to different well depths in the well before or at the beginning of production of the oil well to be measured;
performing linear fitting on the static temperature data as an abscissa and the different well depths as an ordinate to obtain a static temperature linear fitting line;
obtaining the static temperature T corresponding to the preset depth in the well according to a fitting formula corresponding to the static temperature linear fitting line 1 。
7. The method for obtaining the oil column height according to claim 6, wherein the obtaining the static temperature data corresponding to different depths in the well before or during the initial production of the oil well to be measured comprises:
carrying out static temperature and static pressure gradient test on the oil well to be tested before or at the initial stage of production;
and obtaining static temperature data corresponding to different well depths in the well according to the static temperature and static pressure gradient test.
8. The method of any one of claims 1-4, wherein the predetermined depth is a mid-zone depth, and the mid-zone depth is a depth of a well bottom and a zone contact location.
9. An oil column height acquisition device for performing the acquisition method according to any one of the preceding claims 1-8, wherein the device comprises:
the system comprises a thermometer with a signal remote transmission function, a pressure gauge, a time timer, a display unit and a processing unit, wherein the thermometer is used for obtaining temperature values of different well depths in a well;
the display unit is connected with the processing unit, and the processing unit is used for performing fitting on the static temperature and the flow temperature obtained by the thermometer and the well depth corresponding to the static temperature and the flow temperature to respectively obtain a static temperature linear fitting line and a flow temperature linear fitting line, obtaining the static temperature corresponding to the preset depth according to the static temperature linear fitting line, obtaining the flow temperature corresponding to the preset depth and the ground temperature gradient according to the flow temperature linear fitting line, and obtaining the reservoir oil column height of the oil well to be tested according to the ground temperature gradient and the static temperature and the flow temperature corresponding to the preset depth;
the display unit is used for displaying the static temperature linear fitting line, the flow temperature linear fitting line and the reservoir oil column height.
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| CN1766284A (en) * | 2005-11-29 | 2006-05-03 | 大庆石油管理局 | Stratum pressure recognition method by abnormal fluid immersing into well bore |
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| CN108825218A (en) * | 2018-04-27 | 2018-11-16 | 中国石油天然气股份有限公司 | formation temperature testing method and device |
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| CN1766284A (en) * | 2005-11-29 | 2006-05-03 | 大庆石油管理局 | Stratum pressure recognition method by abnormal fluid immersing into well bore |
| CN103590818A (en) * | 2013-10-21 | 2014-02-19 | 中国石油天然气股份有限公司 | Method and device for semi-analytically determining temperature distribution in shaft |
| CN108825218A (en) * | 2018-04-27 | 2018-11-16 | 中国石油天然气股份有限公司 | formation temperature testing method and device |
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