CN113236235A - Preparation of tracing ceramsite and method for detecting fracturing seam width by using same - Google Patents
Preparation of tracing ceramsite and method for detecting fracturing seam width by using same Download PDFInfo
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- CN113236235A CN113236235A CN202110657410.3A CN202110657410A CN113236235A CN 113236235 A CN113236235 A CN 113236235A CN 202110657410 A CN202110657410 A CN 202110657410A CN 113236235 A CN113236235 A CN 113236235A
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- ceramsite
- tracer
- neutron
- stratum
- formation
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000000700 radioactive tracer Substances 0.000 claims abstract description 29
- 238000012216 screening Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 238000005469 granulation Methods 0.000 claims abstract description 8
- 230000003179 granulation Effects 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 8
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 4
- 238000000227 grinding Methods 0.000 claims abstract description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 11
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000003475 lamination Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 13
- 239000004576 sand Substances 0.000 description 7
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The invention provides a preparation method of tracing ceramsite, which comprises the steps of feeding a neutron capture material into a ball mill, adding bauxite into the ball mill, and grinding to obtain mixed ground powder; feeding the mixed ground powder into a granulator for granulation, and screening after granulation is finished; and after the screening is finished, feeding the mixture into a rotary kiln for roasting, cooling the roasted mixture, and screening the finished product. The method comprises the steps of injecting prepared tracer ceramsite into a stratum crack to be detected; emitting high-energy fast neutrons into the stratum by using a tracer ceramsite matched detection instrument, and detecting thermal neutrons which are not captured by the stratum after the fast neutrons are decelerated by the stratum; and detecting the 2160us thermal neutron counting rate after the fast neutron beam is emitted by using a long and short source distance detector, and obtaining the macroscopic neutron capture cross section of the stratum according to the neutron data recorded in each channel. The method can effectively, accurately and quantitatively determine the width of the stratum fracture.
Description
Technical Field
The invention belongs to the field of tracing ceramsite, and particularly relates to a preparation method of the tracing ceramsite and a method for detecting a fracture width by using the tracing ceramsite.
Background
The evaluation technology of the fracturing fracture of the tracer ceramsite is mainly used for describing the height of a vertical fracture (the laying height of a propping agent). The tracing ceramsite contains gadolinium (Gd) elements with high neutron capture cross sections and high capture gamma cross sections, neutron-neutron or neutron-gamma logging response is changed, and the artificial fracture height can be identified by comparing logging information before and after fracturing. Although fracturing is an efficient construction process, there is still a need for evaluating the morphology of fractures near the wellbore after fracturing: sometimes certain designed fracturing intervals are not effectively crushed for various reasons (e.g., formation anomalies, plugged perforations, etc.); the fracture may also be over-extended in the vertical direction beyond the designed fracture interval. Accurate evaluation of the fracture location (height) and width is helpful for the formulation of future measure schemes of the well and the adjustment of fracture schemes of other wells in the same block.
In the fracturing process, the tracing ceramsite may appear in abnormal areas sometimes and exist on a cement sheath or a hanging well wall, and the conditions affect the measurement of the logging instrument on the cracks where the tracing ceramsite is located, so that the interference of the abnormal areas where the tracing ceramsite is located needs to be eliminated, and the cracks are monitored.
Therefore, the preparation of the tracing ceramsite and the method for detecting the width of the fracturing seam by using the tracing ceramsite are provided, the width of the fracture of the stratum can be effectively, accurately and quantitatively determined, and the fracturing operation condition is analyzed.
Disclosure of Invention
In order to solve the technical problem, the invention provides a preparation method of tracing ceramsite, which comprises the following steps:
step 1: feeding the neutron capture material into a ball mill, adding bauxite into the ball mill, and grinding to obtain mixed ground powder;
step 2: feeding the mixed ground powder into a granulator for granulation, and screening after granulation is finished;
and step 3: and after screening, feeding the mixture into a rotary kiln for roasting, cooling the roasted mixture, and screening the finished product to obtain the tracing ceramsite with excellent performance.
Preferably, the neutron capture material has a melting point of 1600 ℃.
Preferably, the roasting temperature of the rotary kiln is 1300 ℃.
Preferably, the obtained tracing ceramsite is used for carrying out formation fracturing crack width detection, and the method comprises the following steps:
step A: injecting the prepared tracing ceramsite into a stratum crack to be detected;
and B: emitting high-energy fast neutrons into the stratum by using a tracer ceramsite matched detection instrument, and detecting thermal neutrons which are not captured by the stratum after the fast neutrons are decelerated by the stratum;
and C: detecting the 2160us thermal neutron counting rate after the fast neutron beam is emitted by using a long and short source distance detector, and obtaining the macroscopic neutron capture cross section of the stratum according to the neutron data recorded in each channel;
step D: because the tracing ceramsite is added with the material with super strong capturing capacity for neutrons, the obtained long and short source distance counting rates and neutron capturing cross section curves can correspondingly and obviously change in the stratum filled with the tracing ceramsite, and further the fracturing seam width of the stratum can be conveniently calculated.
Compared with the prior art, the invention has the beneficial effects that:
1. the trace ceramsite can effectively, accurately and quantitatively determine the width of the cracks of the stratum through a detection instrument matched with the trace ceramsite, and analyze the fracturing operation condition.
2. The tracer ceramsite disclosed by the invention has tracer property, but does not have radioactivity, and also has all physical properties of common ceramsite, and tracer elements of the tracer ceramsite can coexist in ceramsite proppant, so that the tracer ceramsite has super-strong neutron capture capacity, does not have residual pollution, does not pollute an operation pipe column, does not have radioactive flowback fluid, is harmless to human bodies and the environment, and is safe and reliable.
Drawings
FIG. 1 is a comparative graph of the capture cross-section of the tracer ceramsite in comparative example 1 according to the present invention;
FIG. 2 is a comparative graph of the capture cross-section of the tracer ceramsite in comparative example 2 according to the present invention;
FIG. 3 is a comparative graph of the capture cross-section of the tracer ceramsite in comparative example 3 according to the present invention;
FIG. 4 is a comparative graph of the capture cross-section of the tracer ceramsite in comparative example 4 according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
example (b):
as shown in the attached figure 1, the invention provides a preparation method of tracing ceramsite, which comprises the following steps:
step 1: feeding a neutron capture material into a ball mill, wherein the melting point of the neutron capture material is 1600 ℃, and then adding bauxite into the ball mill for grinding to obtain mixed ground powder;
step 2: feeding the mixed ground powder into a granulator for granulation, and screening after granulation is finished;
and step 3: and after screening, feeding the mixture into a rotary kiln, roasting at the roasting temperature of 1300 ℃, cooling after roasting, and screening the finished product to obtain the tracing ceramsite with excellent performance.
Specifically, the obtained tracing ceramsite is used for carrying out formation fracturing crack width detection, and the method comprises the following steps:
step A: injecting the prepared tracing ceramsite into a stratum crack to be detected;
and B: emitting high-energy fast neutrons into the stratum by using a tracer ceramsite matched detection instrument, and detecting thermal neutrons which are not captured by the stratum after the fast neutrons are decelerated by the stratum;
and C: detecting the 2160us thermal neutron counting rate after the fast neutron beam is emitted by using a long and short source distance detector, and obtaining the macroscopic neutron capture cross section of the stratum according to the neutron data recorded in each channel;
step D: because the tracing ceramsite is added with the material with super strong capturing capacity for neutrons, the obtained long and short source distance counting rates and neutron capturing cross section curves can correspondingly and obviously change in the stratum filled with the tracing ceramsite, and further the fracturing seam width of the stratum can be conveniently calculated.
Comparative example 1:
in a suburb, for different proportions of tracing ceramsite sand detection experiments, the proportions of the tracing ceramsite sand are respectively 0%, 1%, 3%, 5%, 10%, 30% and 100%.
As shown in the attached figure 1, 10%, 30% and 100% of the labeled ceramsite are subjected to on-site short-source-distance counting rate and capture cross section respectively, and the results show that the capture cross section value of the labeled ceramsite is higher for 100%, the mean value is 16.02c.u, the capture cross section mean values of the labeled ceramsite with the proportion of 30% and the labeled ceramsite with the proportion of 10% are not greatly different, wherein the mean value of the labeled ceramsite with the proportion of 30% is 14.82c.u, and the mean value of the labeled ceramsite with the proportion of 10% is 14.79 c.u.
Comparative example 2:
as shown in the attached figure 2, 0%, 1%, 3% and 5% of the labeled ceramsite are subjected to on-site short-source-distance counting rate and capture cross section respectively, and the results show that the average value of the capture cross section of the labeled ceramsite with the proportion of 5% is 15.24c.u, the average value of the labeled ceramsite with the proportion of 3% is 13.27c.u, the average value of the labeled ceramsite with the proportion of 1% is 13.25c.u, and the average value of the labeled ceramsite with the proportion of 0% is 13.87 c.u.
Comparative example 3:
as shown in figure 3, 10% and 30% of the traced ceramsite are subjected to on-site short-source-distance counting rate and capture cross section, and the result shows that the traced ceramsite sand is 30% and 0% of the captured cross section have certain difference and good correlation.
Comparative example 4:
as shown in the attached figure 4, 100% and 0% of the tracer ceramsite are subjected to on-site short-source-distance counting rate and capture cross section respectively, and the result shows that the difference between the capture cross section values of the tracer ceramsite sand of 100% and the capture cross section values of 0% is larger, and the correlation is better.
In summary, through comparison of comparative examples 1 to 4, it can be known that the capture cross-sectional value is the highest when the tracer ceramsite sand accounts for 100%, but the construction cost is high, the capture cross-sectional value is the lowest when the tracer ceramsite sand accounts for 30%, and the proportion of the tracer ceramsite sand is selected to be between 30% and 100%.
In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second", "third", "fourth" 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, whereby the features defined as "first", "second", "third", "fourth" may explicitly or implicitly include at least one such feature.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110657410.3A CN113236235A (en) | 2021-06-11 | 2021-06-11 | Preparation of tracing ceramsite and method for detecting fracturing seam width by using same |
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| CN202110657410.3A CN113236235A (en) | 2021-06-11 | 2021-06-11 | Preparation of tracing ceramsite and method for detecting fracturing seam width by using same |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114456797A (en) * | 2022-03-18 | 2022-05-10 | 河南天祥新材料股份有限公司 | A ceramic tracer proppant |
| CN118859345A (en) * | 2024-07-08 | 2024-10-29 | 河南省科学院同位素研究所有限责任公司 | A preparation system for non-radioactive tracer ceramsite with stable signal-to-noise ratio |
| CN118884548A (en) * | 2024-07-08 | 2024-11-01 | 河南省科学院同位素研究所有限责任公司 | A method for preparing non-radioactive tracer ceramsite with stable signal-to-noise ratio |
-
2021
- 2021-06-11 CN CN202110657410.3A patent/CN113236235A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114456797A (en) * | 2022-03-18 | 2022-05-10 | 河南天祥新材料股份有限公司 | A ceramic tracer proppant |
| WO2023173576A1 (en) * | 2022-03-18 | 2023-09-21 | 河南天祥新材料股份有限公司 | Ceramic tracing proppant |
| US12466993B2 (en) | 2022-03-18 | 2025-11-11 | Henan Tianxiang New Materials Co., Ltd. | Ceramic tracing proppant |
| CN118859345A (en) * | 2024-07-08 | 2024-10-29 | 河南省科学院同位素研究所有限责任公司 | A preparation system for non-radioactive tracer ceramsite with stable signal-to-noise ratio |
| CN118884548A (en) * | 2024-07-08 | 2024-11-01 | 河南省科学院同位素研究所有限责任公司 | A method for preparing non-radioactive tracer ceramsite with stable signal-to-noise ratio |
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