CN113049442A - High-temperature and high-pressure cement slurry density testing device and method - Google Patents
High-temperature and high-pressure cement slurry density testing device and method Download PDFInfo
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- CN113049442A CN113049442A CN202110250348.6A CN202110250348A CN113049442A CN 113049442 A CN113049442 A CN 113049442A CN 202110250348 A CN202110250348 A CN 202110250348A CN 113049442 A CN113049442 A CN 113049442A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/02—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume
Abstract
The invention discloses a high-temperature and high-pressure cement slurry density testing device and a method, wherein the testing device comprises a sealing container, a cement slurry injection device, a pressurizing device, a heating device and a detecting device which are respectively connected with the sealing container, and a pressure monitoring device I is arranged on the sealing container; the cement paste injection device comprises a cement paste storage tank and a cement paste injection pump which are connected, the output end of the cement paste injection pump is connected with the sealing container through a first pipeline, and a first valve is arranged on the first pipeline; the pressurizing device comprises an air inlet pump and an air storage bottle which are connected, an air outlet of the air storage bottle is communicated with the sealed container through a second pipeline, and a second pressure monitoring device and a second valve are sequentially arranged on the second pipeline; the detection device comprises a volume measuring instrument and a weight measuring instrument. The invention can more accurately measure the cement slurry density under the stratum condition and provide technical support for oilfield site construction.
Description
Technical Field
The invention relates to the technical field of cement slurry detection in well cementation operation, in particular to a high-temperature and high-pressure cement slurry density testing device and method.
Background
The well cementation operation is an indispensable important link in the well drilling and completion operation and comprises casing running and cementing. The well cementation technology is a comprehensive application technology of multiple disciplines and has the characteristics of systematicness, disposability and short time. The cementing is a key process after the casing is put into the well, and is used for sealing the annular space between the casing and the well wall so as to seal an oil-gas water layer and enable the casing to become a channel for oil gas to enter the well. The density of the cement slurry has great influence on the rheological property, sedimentation stability, water loss, compressive strength and other aspects of the cement slurry, and the performances determine the success of well cementation operation. Therefore, the accurate control of the density of the underground cement slurry has important significance on the successful execution of well cementation operation.
At present, in the aspect of well cementation cement slurry density testing, no unique execution standard exists in China, and meanwhile, no portable testing tool suitable for an oil field site and a corresponding testing method are available. Particularly, the prior domestic related experimental device is not complete in the aspect of measuring the density of the cement slurry under the conditions of high temperature and high pressure, and has larger lifting space. Meanwhile, the existing devices and methods for testing the density of the well cementation cement slurry are few in number, the well cementation cement slurry is mostly tested in a common environment, and an actual stratum environment is not simulated, so that the real density of the cement slurry is difficult to calculate truly, and the testing accuracy and reliability are low.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a high-temperature and high-pressure cement slurry density testing device and method, which are used for simulating a high-temperature and high-pressure environment of a stratum based on the condition of the existing well cementation cement slurry density test, testing the density of the well cementation cement slurry under the condition and ensuring the authenticity and accuracy of an experiment.
The technical scheme of the invention is as follows:
on one hand, the device and the method for testing the density of the high-temperature and high-pressure cement slurry comprise a sealing container, a cement slurry injection device, a pressurizing device, a heating device and a detection device which are respectively connected with the sealing container, wherein a first pressure monitoring device is arranged on the sealing container; the cement paste injection device comprises a cement paste storage tank and a cement paste injection pump which are connected, the output end of the cement paste injection pump is connected with the sealing container through a first pipeline, and a first valve is arranged on the first pipeline; the pressurizing device comprises an air inlet pump and an air storage bottle which are connected, an air outlet of the air storage bottle is communicated with the sealed container through a second pipeline, and a second pressure monitoring device and a second valve are sequentially arranged on the second pipeline; the detection device comprises a volume measuring instrument and a weight measuring instrument.
Preferably, the first pressure monitoring device and the second pressure monitoring device respectively adopt a pressure gauge or a pressure sensor.
Preferably, a third valve and a fourth valve are further arranged on the first pipeline and the second pipeline respectively, and the third valve and the fourth valve are adjacent to the sealed container.
Preferably, the outer surface of the sealed container is also provided with an insulating layer.
Preferably, the sealed container is a high-temperature and high-pressure resistant glass container, a high-temperature and high-pressure resistant glass container II with scales and an opening at the top is arranged in the sealed container, the opening is over against the output end of the pipeline I, and a heat-conducting medium is arranged in an annular space between the sealed container and the high-temperature and high-pressure resistant glass container II.
Preferably, the monitoring device further comprises a monitor and a camera which are connected.
On the other hand, the method for testing the density of the high-temperature high-pressure cement paste by adopting the device for testing the density of the high-temperature high-pressure cement paste comprises the following steps:
s1: checking the sealing performance of the test device;
s2: opening the heating device to raise the temperature of the sealed container to the simulated formation temperature;
s3: opening the cement paste injection device, pumping cement paste into the sealed container and then closing the sealed container;
s4: opening the pressurizing device and the heating device, and closing the pressurizing device and the heating device after the temperature and the pressure are both increased to the simulated formation temperature and the simulated formation pressure;
s5: obtaining, by the detection device, a cement slurry volume and a weight under conditions of the simulated formation temperature and the simulated formation pressure;
s6: and according to the volume and the weight obtained in the step S5, calculating the density of the cement slurry under the conditions of the simulated formation temperature and the simulated formation pressure by combining a density formula.
The invention has the beneficial effects that:
the invention can improve the difficult situation that the field test of the high-temperature and high-pressure cement slurry density is inconvenient, and can effectively relieve a series of engineering and technical problems caused by inaccurate calculation of the cement slurry density in the high-temperature and high-pressure environment; meanwhile, the testing device is small in size, cheap to carry, suitable for complex construction environments of oil field sites and high in adaptability; the invention simplifies the complicated procedures of testing cement slurry on the oil field site, saves time and cost, and makes certain contribution to the performance of other processes.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of a high-temperature high-pressure cement slurry density testing device according to the present invention.
Reference numbers in the figures: 1-a sealed container, 2-a cement slurry injection pump, 3-a valve I, 4-an air inlet pump, 5-an air storage bottle, 6-a pressure monitoring device II, 7-a valve II, 8-a weight measuring instrument, 9-a valve III, 10-a valve IV, 11-a heating layer, 12-a heat insulation layer, 13-a high temperature and high pressure resistant glass container II, 14-a monitor and 15-a camera.
Detailed Description
The invention is further illustrated with reference to the following figures and examples. It should be noted that, in the present application, the embodiments and the technical features of the embodiments may be combined with each other without conflict. It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the present invention, the terms "first", "second", and the like are used for distinguishing similar objects, but not for describing a particular order or sequence order, unless otherwise specified. It is to be understood that the terms so used; the terms "upper", "lower", "left", "right", and the like are used generally with respect to the orientation shown in the drawings, or with respect to the component itself in a vertical, or gravitational orientation; likewise, "inner", "outer", and the like refer to the inner and outer relative to the contours of the components themselves for ease of understanding and description. The above directional terms are not intended to limit the present invention.
On one hand, as shown in fig. 1, the invention provides a high-temperature and high-pressure cement slurry density testing device, which comprises a sealed container 1, a cement slurry injection device, a pressurizing device, a heating device and a detection device, wherein the cement slurry injection device, the pressurizing device, the heating device and the detection device are respectively connected with the sealed container 1, and a first pressure monitoring device (not shown in the figure) is arranged on the sealed container 1; the cement paste injection device comprises a cement paste storage tank (not shown in the figure) and a cement paste injection pump 2 which are connected, the output end of the cement paste injection pump 2 is connected with the sealing container 1 through a first pipeline, and a first valve 3 is arranged on the first pipeline; the pressurizing device comprises an air inlet pump 4 and an air storage bottle 5 which are connected, an air outlet of the air storage bottle 5 is communicated with the sealed container 1 through a second pipeline, a second pressure monitoring device 6 and a second valve 7 are sequentially arranged on the second pipeline, and the first pressure monitoring device and the second pressure monitoring device 6 respectively adopt a pressure gauge or a pressure sensor; the detection means comprise a volume measuring instrument and a weight measuring instrument 8.
In a specific embodiment, a valve three 9 and a valve four 10 are further disposed on the first pipeline and the second pipeline, respectively, and the valve three 9 and the valve four 10 are adjacent to the sealed container 1.
In a specific embodiment, the heating device of the sealed container 1 uses a heating layer 11 composed of resistance wires for heating, and optionally, in order to avoid heat loss and reduce waste, an insulating layer 12 is further provided outside the heating layer 11.
In a specific embodiment, the sealed container 1 is a high-temperature and high-pressure resistant glass container, a second high-temperature and high-pressure resistant glass container 13 with scales and an open top is arranged in the sealed container 1, the opening is over against the output end of the first pipeline, and a heat conducting medium is arranged in an annular space between the sealed container 1 and the second high-temperature and high-pressure resistant glass container 13. Optionally, the heat transfer medium is heat transfer oil.
Optionally, in the above embodiment, the testing device further comprises a monitoring device, and the monitoring device comprises a monitor 14 and a camera 15 which are connected. Through monitoring devices, the change condition of the cement paste under the high temperature and high pressure condition can be observed in real time.
On the other hand, the invention also provides a high-temperature high-pressure cement slurry density testing method, which adopts the high-temperature high-pressure cement slurry density testing device to test and comprises the following steps:
s1: checking the sealing performance of the test device;
s2: opening the heating device to raise the temperature of the sealed container to the simulated formation temperature;
s3: opening the cement paste injection device, pumping cement paste into the sealed container and then closing the sealed container;
s4: opening the pressurizing device and the heating device, and closing the pressurizing device and the heating device after the temperature and the pressure are both increased to the simulated formation temperature and the simulated formation pressure;
s5: obtaining, by the detection device, a cement slurry volume and a weight under conditions of the simulated formation temperature and the simulated formation pressure;
s6: and calculating the density of the cement slurry under the conditions of the simulated formation temperature and the simulated formation pressure according to the volume and the weight obtained in the step S5 and by combining a density formula rho-M/V.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. The high-temperature and high-pressure cement slurry density testing device is characterized by comprising a sealing container, a cement slurry injection device, a pressurizing device, a heating device and a detecting device, wherein the cement slurry injection device, the pressurizing device, the heating device and the detecting device are respectively connected with the sealing container; the cement paste injection device comprises a cement paste storage tank and a cement paste injection pump which are connected, the output end of the cement paste injection pump is connected with the sealing container through a first pipeline, and a first valve is arranged on the first pipeline; the pressurizing device comprises an air inlet pump and an air storage bottle which are connected, an air outlet of the air storage bottle is communicated with the sealed container through a second pipeline, and a second pressure monitoring device and a second valve are sequentially arranged on the second pipeline; the detection device comprises a volume measuring instrument and a weight measuring instrument.
2. The device for testing the density of the high-temperature and high-pressure cement slurry as claimed in claim 1, wherein the first pressure monitoring device and the second pressure monitoring device respectively adopt a pressure gauge or a pressure sensor.
3. The device for testing the density of the high-temperature and high-pressure cement slurry as claimed in claim 1, wherein a third valve and a fourth valve are further arranged on the first pipeline and the second pipeline respectively, and the third valve and the fourth valve are adjacent to the sealed container.
4. The device for testing the density of the high-temperature and high-pressure cement slurry as claimed in claim 1, wherein an insulating layer is further arranged on the outer surface of the sealed container.
5. The device for testing the density of the high-temperature and high-pressure cement slurry according to any one of claims 1 to 4, wherein the sealing container is a high-temperature and high-pressure resistant glass container, a second high-temperature and high-pressure resistant glass container with scales and an open top is arranged in the sealing container, the opening is over against the output end of the first pipeline, and a heat conducting medium is arranged in an annular space between the sealing container and the second high-temperature and high-pressure resistant glass container.
6. The high-temperature high-pressure cement slurry density testing device according to claim 5, further comprising a monitoring device, wherein the monitoring device comprises a monitor and a camera which are connected.
7. A method for testing the density of high-temperature high-pressure cement slurry, which is characterized by adopting the device for testing the density of the high-temperature high-pressure cement slurry as claimed in any one of claims 1 to 6, and comprises the following steps:
s1: checking the sealing performance of the test device;
s2: opening the heating device to raise the temperature of the sealed container to the simulated formation temperature;
s3: opening the cement paste injection device, pumping cement paste into the sealed container and then closing the sealed container;
s4: opening the pressurizing device and the heating device, and closing the pressurizing device and the heating device after the temperature and the pressure are both increased to the simulated formation temperature and the simulated formation pressure;
s5: obtaining, by the detection device, a cement slurry volume and a weight under conditions of the simulated formation temperature and the simulated formation pressure;
s6: and according to the volume and the weight obtained in the step S5, calculating the density of the cement slurry under the conditions of the simulated formation temperature and the simulated formation pressure by combining a density formula.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110250348.6A CN113049442A (en) | 2021-03-08 | 2021-03-08 | High-temperature and high-pressure cement slurry density testing device and method |
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| CN202110250348.6A CN113049442A (en) | 2021-03-08 | 2021-03-08 | High-temperature and high-pressure cement slurry density testing device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114324059A (en) * | 2022-01-11 | 2022-04-12 | 西南石油大学 | Device and method for accurately testing apparent density of light material in well cementation cement slurry system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1676873A (en) * | 2005-04-19 | 2005-10-05 | 西南石油学院 | High temperature high pressure oil well cement paste coagulation instrument and its coagulation time measuring method |
| CN209971128U (en) * | 2019-04-18 | 2020-01-21 | 中国三峡建设管理有限公司 | Cement slurry preparation device adopting flow meter and weighing method |
| CN110749626A (en) * | 2019-10-29 | 2020-02-04 | 西南石油大学 | Device and method for measuring initial and final setting time of cement paste at high temperature and high pressure |
| CN111579875A (en) * | 2020-06-28 | 2020-08-25 | 西南石油大学 | High-temperature and high-pressure cement slurry conductivity testing device and method |
-
2021
- 2021-03-08 CN CN202110250348.6A patent/CN113049442A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1676873A (en) * | 2005-04-19 | 2005-10-05 | 西南石油学院 | High temperature high pressure oil well cement paste coagulation instrument and its coagulation time measuring method |
| CN209971128U (en) * | 2019-04-18 | 2020-01-21 | 中国三峡建设管理有限公司 | Cement slurry preparation device adopting flow meter and weighing method |
| CN110749626A (en) * | 2019-10-29 | 2020-02-04 | 西南石油大学 | Device and method for measuring initial and final setting time of cement paste at high temperature and high pressure |
| CN111579875A (en) * | 2020-06-28 | 2020-08-25 | 西南石油大学 | High-temperature and high-pressure cement slurry conductivity testing device and method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114324059A (en) * | 2022-01-11 | 2022-04-12 | 西南石油大学 | Device and method for accurately testing apparent density of light material in well cementation cement slurry system |
| CN114324059B (en) * | 2022-01-11 | 2023-11-03 | 西南石油大学 | Device and method for accurately testing apparent density of light material in well cementation cement slurry system |
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