CN115614028A - Tracer water finding tool and tracer liquid production profile water finding method - Google Patents
Tracer water finding tool and tracer liquid production profile water finding method Download PDFInfo
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- CN115614028A CN115614028A CN202110790399.8A CN202110790399A CN115614028A CN 115614028 A CN115614028 A CN 115614028A CN 202110790399 A CN202110790399 A CN 202110790399A CN 115614028 A CN115614028 A CN 115614028A
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- 239000000700 radioactive tracer Substances 0.000 title claims abstract description 157
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 107
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 51
- 239000007788 liquid Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000012530 fluid Substances 0.000 claims abstract description 24
- 238000012360 testing method Methods 0.000 claims abstract description 12
- 238000005070 sampling Methods 0.000 claims abstract description 11
- 239000002390 adhesive tape Substances 0.000 claims description 15
- 229920000642 polymer Polymers 0.000 claims description 15
- 230000015572 biosynthetic process Effects 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 229920003169 water-soluble polymer Polymers 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 235000020681 well water Nutrition 0.000 description 3
- 239000002349 well water Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 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
- E21B47/10—Locating fluid leaks, intrusions or movements
- E21B47/11—Locating fluid leaks, intrusions or movements using tracers; using radioactivity
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Abstract
The invention relates to a tracer water finding tool and a tracer production fluid profile water finding method, wherein the water finding method comprises the following steps: s1, selecting different kinds of tracers according to the number of sections of a fracturing section; s2, respectively preparing the different types of tracers into the tracer water finding tool; s3, connecting the tracer water-finding tool with an oil pipe, putting the tracer water-finding tool into a target layer, and then performing well opening production to release the tracer, wherein the target layer corresponds to a perforation section of the fracturing section; and S4, sampling at a wellhead, analyzing and testing the sample, and determining the water outlet condition of the liquid production profile of each fracturing section. According to the water finding method, the produced fluid tracer is analyzed and tested, the water producing conditions of all sections are analyzed by combining a shaft model and a geological model, the operation is simple and convenient, the water finding of the horizontal well can be realized quickly, the water finding period is within 10 days, and the technical requirements of the horizontal well on quickness, economy and high efficiency are met.
Description
Technical Field
The invention belongs to the technical field of underground rapid water exploration, and particularly relates to a tracer water exploration tool and a tracer production fluid profile water exploration method.
Background
In recent years, with the progress of well drilling and completion and reservoir transformation technologies, the application scale of highly deviated wells and horizontal wells is enlarged year by year at home and abroad in unconventional oil and gas reservoirs, the horizontal wells increase the oil drainage area of a producing zone, and the horizontal wells can develop oil reservoirs under low production pressure difference, so that the horizontal wells become important technical means for accelerating the production capacity construction speed, improving the oil extraction efficiency and increasing the recoverable reserves. The biggest defect of the horizontal well is that the well body of the horizontal well is parallel to an oil reservoir, so that the horizontal well can easily produce a large amount of water, the oil production of the horizontal well can be reduced suddenly due to the water production of the horizontal well, the water content of the horizontal well is increased rapidly, and even the whole oil well is flooded. How to effectively find water becomes a very critical problem in the production of the horizontal well.
At present, the water exploration test process technology of highly deviated wells and horizontal wells at home and abroad mainly determines the water outlet part of the stratum by putting related test instruments, and the technology has the problems of large influence by instrument deployment capacity, shaft and fluid conditions, long construction period, low efficiency, high comprehensive cost and the like, so that the technical requirements of the horizontal wells for rapid, efficient and economic water exploration are urgently needed to be met.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a tracer water finding tool and a tracer production profile water finding method. The technical problem to be solved by the invention is realized by the following technical scheme:
the embodiment of the invention provides a tracer water-finding tool, which is used for monitoring the water production conditions of liquid production profiles of horizontal wells and highly-deviated wells, and comprises: a base pipe, tracer tape and a screen pipe, wherein,
the tracer adhesive tape is arranged on the outer layer of the base pipe, and the sieve pipe is arranged on the outer layer of the tracer adhesive tape.
In one embodiment of the invention, the tracer tape is made of a tracer and a polymer in a preset ratio.
In one embodiment of the invention, the polymer is a water soluble polymer or an oil soluble polymer and the tracer tape is a water soluble tape or an oil soluble tape.
In one embodiment of the invention, the screen has an opening ratio of greater than or equal to 55%.
Another embodiment of the present invention provides a tracer liquid production profile water exploration method, wherein a tracer water exploration tool as described in the above embodiments is used to explore water for highly deviated wells and horizontal wells, and the water exploration method includes the steps of:
s1, selecting different types of tracers according to the number of sections of a fracturing section;
s2, respectively preparing the different types of tracers into the tracer water finding tool;
s3, connecting the tracer water-finding tool with an oil pipe, putting the tracer water-finding tool into a target layer, and then performing well opening production to release the tracer, wherein the target layer corresponds to a perforation section of the fracturing section;
and S4, sampling at a wellhead, analyzing and testing the sample, and determining the water outlet condition of the liquid production profile of each fracturing section.
In one embodiment of the invention, the tracer is of a type number consistent with the number of segments of the fracture.
In one embodiment of the present invention, step S2 comprises:
preparing the different types of tracers and polymers into tracer tapes according to a preset proportion;
the tracer adhesive tape is arranged on the outer layer of the base pipe;
and installing a screen pipe on the outer layer of the tracer adhesive tape to form the tracer water finding tool.
In one embodiment of the invention, the tracer water-finding tool has a diameter that coincides with the diameter of the tubing.
In one embodiment of the present invention, step S3 comprises:
the original well pipe column is lifted out, and the target layer position is determined according to the geological parameters of the fracturing section;
connecting the tracer water exploration tool with an oil pipe of the original well pipe string through a joint hoop;
the connected pipe column is lowered into the target horizon, and a well is opened for production;
and after the formation fluid is contacted with the tracer water-searching tool of each perforation section, the tracer water-searching tool releases the tracer, the formation fluid carrying the tracer flows to a target liquid inlet section by section from the last fracturing section, enters an oil pipe from the target liquid inlet and is finally taken out of the borehole.
In one embodiment of the present invention, step S4 comprises:
sampling is started after the 48 th hour of well opening production, the continuous stable sampling time is longer than or equal to 72 hours, the number of samples is longer than or equal to 2 every time, and the volume of each sample is larger than or equal to 1000mL;
and detecting the concentration of the tracer in the sample, and analyzing the water outlet condition of each fracturing section according to the variety and quantity change of the detected tracer.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the horizontal well water exploration is carried out by the tracer water exploration tool, a packer does not need to be put in the horizontal well, the construction is simple, and the safety of the horizontal well operation is improved.
2. The water finding method provided by the invention analyzes and tests the produced fluid tracer, analyzes the water producing condition of each section by combining the shaft model and the geological model, is simple and convenient to operate, can realize quick water finding of the horizontal well, has a water finding period within 10 days, and meets the technical requirements of the horizontal well on quickness, economy and high efficiency.
Drawings
Fig. 1 is a schematic structural diagram of a tracer water exploration tool provided in an embodiment of the present invention;
fig. 2 is a schematic flow chart of a tracer liquid production profile water detection method provided by an embodiment of the invention;
FIG. 3 is a schematic illustration of a tubing string incorporating a tracer water-exploration tool according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a horizontal well water producing section provided by the embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.
Example one
Referring to fig. 1, fig. 1 is a schematic structural diagram of a tracer water-exploration tool provided in an embodiment of the present invention, where the tracer water-exploration tool is used for monitoring water production conditions of a fluid production profile of a horizontal well or a highly deviated well in real time, and includes: base pipe 61, tracer tape 62 and screen 63.
Wherein, the tracer adhesive tape 62 is arranged on the outer layer of the base pipe 61, and the screen pipe 63 is arranged on the outer layer of the tracer adhesive tape 62; namely, the tracer water finding tool comprises a base pipe 61, a tracer tape 62 and a sieve pipe 63 from inside to outside in sequence, wherein the tracer tape 62 is arranged between the base pipe 62 and the sieve pipe 63.
In this embodiment, install the screen pipe at the tracer sticky tape outer layer, the screen pipe plays the effect of protection sticky tape, avoids the silt in the formation fluid to cause sand blocking to the tracer sticky tape.
In one embodiment, the tracer tape 62 is made from a tracer and a polymer in a predetermined ratio. The prepared tracer adhesive tape is an elastic solid material, and can be randomly customized according to the size of an oil pipe nipple in an original well pipe column, namely the length, the width and the thickness of the tracer adhesive tape can be customized according to actual requirements.
Specifically, the tracer is a solid tracer, which is a nano tracer, the sizes of the three dimensions are all below 100 nanometers, and the tracers with different sizes can emit light with different frequencies under the condition of applying an electric field or light pressure, so that the tracer can be used for tracing by utilizing the principle of light emission.
In the embodiment, the tracer has the advantages of multiple types, no toxicity, no harm, no radioactivity, no reaction with formation fluid, and slow and controllable release speed.
Specifically, the polymer is a water-soluble polymer or an oil-soluble polymer, and the prepared tracer tape 62 is also a water-soluble tape or an oil-soluble tape.
In this embodiment, the polymer is a water soluble polymer or an oil soluble polymer, so that the tracer tape can be dissolved when contacting with formation fluid, thereby releasing the tracer.
Further, the preset ratio of the tracer to the polymer is determined according to the release time of the tracer in the formation fluid, and the longer the release time of the tracer is, the larger the ratio of the tracer is, the shorter the release time of the tracer is, and the smaller the ratio of the tracer is.
In one embodiment, the screen 63 has an opening ratio of greater than or equal to 55%, which ensures that the tracer in the tracer tape can be completely released and protects the tape to prevent sand from blocking the tracer tape.
The tracer water exploration tool of the embodiment is easy to manufacture, low in cost, compatible with oil pipes of any size and capable of being used for rapid water exploration of highly deviated wells and horizontal wells.
Example two
Referring to fig. 2, fig. 2 is a schematic flow chart of a tracer production fluid profile water detection method according to an embodiment of the present invention, where the tracer production fluid profile water detection method includes the steps of:
s1, selecting different kinds of tracers according to the number of the sections of the fracturing section.
In particular, the number of tracer types is consistent with the number of stages in the fracturing stage, and each tracer has different, distinguishable properties, e.g., the plurality of tracers have different colors. Taking the number of the fracturing segments as 5 segments as an example, at this time, the number of the types of the tracers is 5, and the colors of the 5 tracers can be purple, blue, light green, dark green and orange respectively; however, the tracer in this embodiment is not limited to distinguishing the tracer by color, and may be other information such as a code of the tracer.
And S2, respectively preparing the different types of tracers into the tracer water exploration tool.
And preparing a tracer adhesive tape from each selected tracer and polymer according to a preset proportion, mounting the tracer adhesive tape on the base pipe, and mounting a sieve pipe on the outer layer of the tracer adhesive tape to obtain the tracer water finding tool.
Furthermore, the number of the types of the tracers is consistent with the number of tracer water-finding tools, namely, one water-finding tool is prepared by each tracer, and a plurality of tracers are prepared into a plurality of tracer water-finding tools.
For a specific structure of the tracer water-finding tool, please refer to embodiment one, which is not described in detail in this embodiment.
And S3, connecting the tracer water-finding tool with an oil pipe, putting the tracer water-finding tool into a target horizon, and then performing well opening production to release the tracer, wherein the target horizon corresponds to the perforation section of the fracturing section.
Firstly, the original well pipe column is lifted out, and a target layer position is determined according to geological parameters of a fracturing section. Specifically, a target horizon of a tracer water exploration tool is determined according to the reservoir physical properties of a fracturing section, fracturing modification parameters and the position of a perforation section; in this embodiment, the target horizon is located at the position of the corresponding perforation section of the fracturing section, for example, when the target fluid inlet position is located at the heel of the horizontal section, the tracer water exploration tool is 20m ahead of the perforation section, and when the target fluid inlet position is located at the toe of the horizontal section, the tracer water exploration tool is 20m behind the perforation section.
And then, connecting the tracer water-exploration tool with the oil pipe of the original well pipe string through the joint hoop. Specifically, the diameter of the tracer water finding tool is consistent with the diameter of the oil pipe.
And then, running the connected pipe column into a target horizon, and opening a well for production. Referring to fig. 3, fig. 3 is a schematic diagram of a tubing string with a tracer water-exploration tool installed therein, which is run into a fracturing segment perforation interval according to an embodiment of the present invention. The wellbore string includes: well head 1, oil pipe 2, pump string 3, inlet 4, a plurality of perforation section 5, a plurality of spike agent water-finding instrument 6, wherein, oil pipe 2 comprises vertical section and horizontal segment, and well head 1 sets up the tip at 2 vertical sections of oil pipe, and pump string 3 sets up in the inside of 2 vertical sections of oil pipe, and inlet 4 sets up the junction at 2 vertical sections of oil pipe and horizontal segment, and every spike agent water-finding instrument 6 is connected through the oil pipe of festival hoop with the horizontal segment.
After the tracer water-finding tool is put into a target layer, the well is opened for production, after a formation fluid is contacted with the tracer water-finding tool of each perforation section, the tracer adhesive tape is an oil-soluble or water-soluble adhesive tape, the tracer adhesive tape releases the tracer, the tracer enters the formation fluid and flows to a target liquid inlet section by section from the last fracturing section along with the formation fluid, the target liquid inlet is a unique liquid inlet and enters the oil pipe from the target liquid inlet, the flowing direction is unidirectional, and finally the formation fluid carries the tracer to flow out of the perforation.
And S4, sampling at a wellhead, analyzing and testing the sample, and determining the water outlet condition of the liquid production profile of each fracturing section.
Specifically, sampling is started at the 48 th hour of open-well production, the continuous stable sampling time is greater than or equal to 72 hours, the number of samples is greater than or equal to 2 each time, and the volume of each sample is greater than or equal to 1000mL.
And after the sample is taken out, detecting the concentration of the tracer in the sample, and analyzing the water outlet condition of each fracturing segment according to the variety and quantity change of the detected tracer. Specifically, according to the detected variety and quantity change of the over-tracer, a well bore model and a geological model are combined to obtain a water production profile of the water production section of each fracturing section, and then the water yield and the water yield of the water production profile of each fracturing section are calculated.
Furthermore, the specific process of analyzing the water outlet condition of each section through the variety and the quantity change of the tracer agent is as follows: and analyzing the tracer in the liquid at the sampling moment, including the total amount of the produced liquid and the types and the contents of all the tracers in the produced liquid, calculating the proportion of the water yield of the water outlet section corresponding to each tracer in the produced liquid, and then calculating the water yield of each section.
In a specific embodiment, the tracer production profile water exploration method described in the above embodiment is used for testing the water production condition of a horizontal well, and the specific structure of the horizontal well is shown in fig. 3, which has 5 test sections, and correspondingly adopts 5 tracer water exploration tools. Referring to fig. 4, fig. 4 is a schematic diagram of a water producing section of a horizontal well according to an embodiment of the present invention, wherein a main water producing section is a 4 th section and produces 66% of water; the secondary water production section comprises: the 1 st and 5 th sections produce 15% and 17% of water respectively, the 3 rd section produces only 1% of water, and the 2 nd section is a section without water production.
The horizontal well water exploration is carried out through the tracer water exploration tool, a packer does not need to be put in the horizontal well, construction is simple, and safety of horizontal well operation is improved. The water finding method of the embodiment analyzes the water producing conditions of each section by analyzing and testing the produced fluid tracer and combining the shaft model and the geological model, is simple and convenient to operate, can realize the quick water finding of the horizontal well, has a water finding period within 10 days, and meets the technical requirements of the horizontal well on quickness, economy and high efficiency.
In conclusion, the tracer water exploration tool is adopted to test the liquid production profile of the water outlet section of the horizontal well, the water production condition of each fracturing section of the horizontal well is quantitatively detected through the type and distribution of the tracer in the wellhead sample, the packer is not used for water exploration of the horizontal well, the technical pipe column is simple and convenient to operate, the water exploration testing precision of the horizontal well is improved according to an interpretation system combining a shaft model and a geological model, more than 5 fracturing sections can be simultaneously tested by the method, the water exploration period of the horizontal well is short, and the method has the characteristics of being fast and efficient.
The foregoing is a further detailed description of the invention in connection with specific preferred embodiments and it is not intended to limit the invention to the specific embodiments described. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. A tracer water-finding tool for monitoring water production conditions in horizontal wells, highly deviated wells, fluid production profiles, the tracer water-finding tool comprising: a base pipe (61), tracer tape (62) and a screen (63), wherein,
the tracer tapes (62) are mounted on the outer layer of the base pipe (61), and the screen pipe (63) is mounted on the outer layer of the tracer tapes (62).
2. Tracer water exploration tool according to claim 1, characterized in that the tracer tape (62) is made of tracer and polymer in a preset ratio.
3. Tracer water detection tool according to claim 2, characterized in that the polymer is a water soluble polymer or an oil soluble polymer and the tracer tape (62) is a water soluble tape or an oil soluble tape.
4. Tracer water exploration tool according to claim 1, characterized in that the screen (63) has an opening rate of greater than or equal to 55%.
5. A tracer liquid production profile water exploration method, which is characterized in that the tracer water exploration tool as claimed in any one of claims 1 to 4 is used for exploring water in highly deviated wells and horizontal wells, and the water exploration method comprises the following steps:
s1, selecting different kinds of tracers according to the number of sections of a fracturing section;
s2, respectively preparing the different types of tracers into the tracer water finding tool;
s3, connecting the tracer water-finding tool with an oil pipe, putting the tracer water-finding tool into a target layer, and then performing well opening production to release the tracer, wherein the target layer corresponds to a perforation section of the fracturing section;
and S4, sampling at a wellhead, analyzing and testing the sample, and determining the water outlet condition of the liquid production profile of each fracturing section.
6. The tracer production profile water exploration method of claim 5, wherein the number of types of tracers is consistent with the number of segments of the fracturing segment.
7. The tracer production profile water exploration method according to claim 5, wherein step S2 comprises:
preparing the different types of tracers and polymers into tracer tapes according to a preset proportion;
installing the tracer tape on an outer layer of a base pipe;
and installing a screen pipe on the outer layer of the tracer adhesive tape to form the tracer water finding tool.
8. The tracer production profile water exploration method of claim 5, wherein the diameter of the tracer water exploration tool is consistent with the diameter of the tubing.
9. The tracer production profile water exploration method according to claim 5, wherein step S3 comprises:
the original well pipe column is lifted out, and the target layer position is determined according to the geological parameters of the fracturing section;
connecting the tracer water exploration tool with an oil pipe of the original well pipe string through a joint hoop;
the connected pipe column is lowered into the target horizon, and a well is opened for production;
and after the formation fluid is contacted with the tracer water-searching tool of each perforation section, the tracer water-searching tool releases the tracer, the formation fluid carrying the tracer flows to a target liquid inlet section by section from the last fracturing section, enters an oil pipe from the target liquid inlet and is finally taken out of the borehole.
10. The tracer production profile water exploration method according to claim 5, wherein step S4 comprises:
sampling is started after the 48 th hour of well opening production, the continuous stable sampling time is longer than or equal to 72 hours, the number of samples is longer than or equal to 2 every time, and the volume of each sample is larger than or equal to 1000mL;
and detecting the concentration of the tracer in the sample, and analyzing the water outlet condition of each fracturing segment according to the variety and quantity change of the detected tracer.
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| CN202110790399.8A CN115614028A (en) | 2021-07-13 | 2021-07-13 | Tracer water finding tool and tracer liquid production profile water finding method |
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