CN111472745A - Horizontal well tectorial membrane proppant staged fracturing yield testing method - Google Patents
Horizontal well tectorial membrane proppant staged fracturing yield testing method Download PDFInfo
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- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
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- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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Abstract
The invention provides a staged fracturing yield test method for a horizontal well membrane-coated propping agent, which is characterized in that a quantum dot technology is adopted to synthesize nano crystals by a tracer through colloid, then the nano crystals are marked in a polymer, the polymer is adsorbed on the surface of the propping agent to form a polymer coating, a fracturing fluid is used for carrying the quantum dot polymer coating propping agent to be added into a stratum during staged fracturing of the horizontal well, the combination of quantum dot tracer markers is judged by sampling produced stratum fluid and irradiating particles in a liquid flow by laser, and the oil production and water production contributions of each interval are accurately calculated. The quantum dot tracer markers have an effective period of up to 2 years. The polymer simultaneously comprises a water-soluble polymer and an oil-soluble polymer, when the polymer meets formation fluid, the quantum dot tracer marker marked on the oil-soluble polymer exists in an oil phase, the quantum dot tracer marker marked on the water-soluble polymer exists in a water phase, and the oil-water phase partition coefficient is stable.
Description
Technical Field
The invention belongs to the technical field of oil extraction engineering, and particularly relates to a horizontal well tectorial membrane proppant staged fracturing yield testing method.
Background
In oil field development, oil well fracturing technology is continuously developed to achieve higher productivity. In recent years, the staged fracturing technology of the horizontal well becomes a main means for effectively developing compact oil, but the fracturing is all multi-stage commingled production, so that how to evaluate and analyze the fracturing effect and the productivity of each stage is very important, and the staged fracturing technology has important guiding significance for fracturing design and development and adjustment in the later stage of fracturing.
The patent with the patent name of 'a method for monitoring the staged fracturing effect of an oil well', in the patent with the application publication number of CN104018822A, a monitoring material and an oil-soluble material are mixed to prepare particles, the particles are pumped together with a fracturing propping agent, when crude oil flows through the tracer particles, the monitoring material is gradually dispersed into an oil phase and a water phase in the crude oil, and the distribution coefficient of the monitoring material in the oil phase and the water phase is combined, so that the staged fracturing effect is analyzed. Because the used tracer is a water-soluble substance, the tracer is only entrained in oil, and a stable oil-water phase distribution coefficient is not provided, so that great errors can be brought to the analysis of the tracer in the oil. In addition, when the oil flows through the solid particles, the particles can be gradually reduced due to the gradual dissolution of the oil-soluble material, the produced fluid can bring the particles out of the ground, and the monitoring period can be greatly shortened.
The patent name is 'a method for testing oil-water contribution of each section of a volume fracturing horizontal well by using a chemical tracer', and the patent application publication number is CN106014389A of CN 106014389A). after different kinds of oil agents and water agents are injected into each section, sampling analysis is carried out in the fracturing flow-back fluid and the production process, the extraction concentration of the oil agents and the water agents in each section is determined, and the oil-producing and water-producing contribution rate of each section is calculated. The method can only monitor the oil production condition of each section during short-term flowback, and the oil-water tracer can be completely extracted along with the continuous flowback of produced liquid, so that the method has no long-term effect.
In summary, the existing testing methods have the following problems: the concentration difference of the tracer is small, and the technical difficulty in distinguishing is high; the effective period of the test sampling analysis after pressing is short, and the monitoring time is generally 2-3 months.
Disclosure of Invention
The invention aims to provide a method for testing the staged fracturing yield of a horizontal well tectorial membrane proppant, which overcomes the technical problems in the prior art.
Therefore, the technical characteristics provided by the invention are as follows:
a horizontal well tectorial membrane proppant staged fracturing yield test method comprises the following steps:
step 1) selecting different types of tracers for different fracturing sections according to the number of staged fracturing sections of the horizontal well;
step 2) marking different types of tracers in polymers to obtain different types of quantum dot polymers, and forming different types of quantum dot polymer coating proppants by using the different types of quantum dot polymers and the proppants;
step 3) during the fracturing construction of each fracturing section, firstly adding part of the proppant along with the fracturing fluid, then adding one quantum dot polymer coating proppant, and finally adding the rest of the proppant, wherein the concentrations of the quantum dot polymer coating proppants added into each fracturing section are the same;
step 4) during the production of the lower pump-combining layer, measuring the liquid output during the production, and simultaneously sampling the formation fluid;
step 5) treating the collected stratum fluid sample, respectively obtaining a water phase quantum dot sample to be detected and an oil phase quantum dot sample to be detected after oil-water treatment, and obtaining the water production contribution rate of each fracturing section according to the ratio of the quantum dot tracer marker of each layer section to the total quantum dot tracer marker in the water phase quantum dot sample to be detected;
and obtaining the oil production contribution rate of each fracturing segment according to the ratio of the quantum dot tracer marker of each interval to the total quantum dot tracer marker in the oil phase quantum dot sample to be detected.
In the step 3), when the fracturing construction of each fracturing section is carried out, a propping agent is firstly added, when the amount of the added propping agent reaches 80-85% of the total designed supporting amount of the section, the quantum dot polymer coating propping agent is added, and the rest propping agent is added, wherein the quantum dot polymer coating propping agent accounts for 1-5% of the total propping agent by volume.
The polymer in the step 2) comprises an oil-soluble polymer and a water-soluble polymer, and the tracer is respectively marked in the oil-soluble polymer and the water-soluble polymer and then is uniformly mixed to be coated on the surface of the proppant, wherein the molar ratio of the oil-soluble polymer to the water-soluble polymer is 1: 1.
The method for obtaining the water production contribution rate or the oil production contribution rate in the step 5) comprises the following steps:
forming a liquid flow with the diameter of 5 microns by using a water phase quantum dot sample to be detected and an oil phase quantum dot sample to be detected, arranging quantum dot tracer markers (2) in a line in the liquid flow, irradiating the liquid flow by using laser to identify the number N of the oil phase quantum dot tracer markers or the water phase quantum dot tracer markers in a certain layer, knowing the total number M of the oil phase quantum dot tracer markers or the water phase quantum dot tracer markers, and obtaining the oil phase or water phase ratio N/M100, namely the oil production contribution rate or the water production contribution rate.
The treatment process of the collected formation fluid sample in the step 5) comprises the following steps: firstly, oil-water separation is carried out, and the chroma is removed after impurity removal of an obtained water sample, so that a sample to be detected containing water-phase quantum dots is obtained; and extracting the oil phase quantum dots in the oil sample to obtain a sample to be detected containing the oil phase quantum dots.
The concentration of the quantum dot polymer coating proppant in the step 5) is the ratio of the quantum dot polymer coating proppant to the sand-carrying fracturing fluid.
During the period of the combined layer production in the step 4), the formation fluid is sampled by 20-30 samples of 100ml each at the well head.
The specific process of treating the collected formation fluid sample is as follows: treating with ultrasonic equipment at 35 deg.C for 25 min, separating oil and water, centrifuging 10ml water sample in the lower layer at 3000 rpm for 30 min with a centrifuge, and removing impurities in water; filtering the water sample by using a filter material to remove the chroma in the water, and finally obtaining a sample to be detected containing the water-phase quantum dots;
and (3) taking 10ml of oil sample on the upper layer, extracting the oil phase quantum dots into the organic solution, and back-extracting the oil phase quantum dots in the organic solution into water to finally obtain the sample to be detected containing the oil phase quantum dots.
The quantum dot tracer marker in the step 5) is a nanocrystal formed by a tracer through a quantum dot technology.
The construction discharge capacity of the fracturing fluid is 10-12m3/min。
The invention has the beneficial effects that:
according to the horizontal well membrane covering proppant staged fracturing yield test method provided by the invention, a quantum dot technology is adopted to synthesize a nano crystal (quantum dot tracer marker) by a tracer through a colloid, the nano crystal is marked in a polymer, the polymer is adsorbed on the surface of the proppant to form a polymer coating, a fracturing fluid is used for carrying the quantum dot polymer coating proppant to be added into a stratum during staged fracturing of a horizontal well, finally, the combination of the quantum dot tracer markers is judged by sampling produced stratum fluid and irradiating particles in a liquid flow with laser, so that the oil production and water production contributions of each interval are accurately calculated.
The quantum dot technology is adopted to synthesize the nano-crystal by the tracer through colloid, and the nano-crystal has long-term effectiveness in reaction with formation fluid. In actual production, the quantum dot tracer marker can be detected in formation fluid within 400 days, the quantum dot tracer marker is still effective in 1080 days through fitting actual data, the quantum dot tracer marker is produced through gradual digestion and flow of exploitation time, and the service life time is as long as 2 years.
Because the polymer simultaneously comprises the water-soluble polymer and the oil-soluble polymer, when the polymer meets formation fluid, the formation fluid has both an oil phase and a water phase, so that the film coating agent on the surface of the proppant is simultaneously oil-soluble and water-soluble, the quantum dot tracer marker marked on the oil-soluble polymer exists in the oil phase, the quantum dot tracer marker marked on the water-soluble polymer exists in the water phase, and the oil-water phase partition coefficient is stable.
During analysis, the combination of the quantum dot tracer markers is judged by irradiating particles in the liquid flow with laser, so that the oil production and water production contributions of each layer section are accurately calculated, and the analysis is accurate.
In order to make the aforementioned and other objects of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1 is a schematic diagram of the detection process of the sample to be detected for water phase quantum dots or the sample to be detected for oil phase quantum dots according to the present invention.
In the figure:
description of reference numerals:
1. a quantum-tagged indicator; 2. a quantum dot tracer label; 3. an optical probe; 4. a dichroic mirror; 5. a filter; 6. A data processing center.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Example 1:
the embodiment provides a horizontal well tectorial membrane proppant staged fracturing yield testing method, which comprises the following steps:
step 1) selecting different types of tracers for different fracturing sections according to the number of staged fracturing sections of the horizontal well;
step 2) marking different types of tracers in polymers to obtain different types of quantum dot polymers, and forming different types of quantum dot polymer coating proppants by using the different types of quantum dot polymers and the proppants;
step 3) during the fracturing construction of each fracturing section, firstly adding part of the proppant along with the fracturing fluid, then adding one quantum dot polymer coating proppant, and finally adding the rest of the proppant, wherein the concentrations of the quantum dot polymer coating proppants added into each fracturing section are the same;
step 4) during the production of the lower pump-combining layer, measuring the liquid output during the production, and simultaneously sampling the formation fluid;
step 5) treating the collected stratum fluid sample, respectively obtaining a water phase quantum dot sample to be detected and an oil phase quantum dot sample to be detected after oil-water treatment, and obtaining the water production contribution rate of each fracturing section according to the ratio of the quantum dot tracer marker 2 of each layer section in the water phase quantum dot sample to be detected to the total quantum dot tracer marker;
and obtaining the oil production contribution rate of each fracturing segment according to the ratio of the quantum dot tracer marker 2 of each layer segment to the total quantum dot tracer marker in the oil phase quantum dot sample to be detected.
Wherein, lower pump-in layer production means that the lower oil well pump is put into production after the staged fracturing of the horizontal well.
The principle of the invention is as follows:
different tracers are adopted in different fracturing intervals, a nanocrystal (namely quantum dot tracer marker 2) is synthesized by the tracers and colloids, the nanocrystal is marked in a polymer to form a quantum dot polymer, a quantum dot polymer coating is arranged on the surface of a propping agent used in fracturing, the propping agent is carried by fracturing fluid and added into a stratum during staged fracturing of a horizontal well, and finally, the combination of the markers (namely the number of quantum dot tracer markers 2 in each fracturing interval and the ratio of the total quantum dot tracer markers) is judged by using laser to irradiate particles in a liquid flow through sampling of produced stratum fluid, so that the oil production and water production contribution rate of each interval is accurately calculated, and the technical support effect is provided for fracturing a preferred interval and optimizing modification parameters by combining with the geological characteristics of the reservoir.
The nano crystal has good stability and long-acting property, so that the long-term monitoring of the oil production condition of each fracturing section can be achieved.
Example 2:
the embodiment provides a horizontal well tectorial membrane proppant staged fracturing yield testing method, which comprises the following steps:
step 1) selecting the same quantity and types of tracers according to the number of staged fracturing sections of the horizontal well;
step 2) marking different types of tracers in polymers to obtain different types of quantum dot polymers, and then coating the different types of quantum dot polymers on the surface of a proppant to form different types of quantum dot polymer coating proppants;
step 3) during fracturing construction, loading the quantum dot polymer coating propping agent by using a sand tank truck, adding a sand hopper of the sand mixing truck, adding one quantum dot polymer coating propping agent into each fracturing section along with fracturing fluid, wherein the concentrations of the quantum dot polymer coating propping agents added into each fracturing section are the same;
during the fracturing construction of each fracturing segment, adding a conventional proppant, adding a quantum dot polymer coating proppant when the amount of the added proppant reaches 80-85% of the total designed supporting amount of the segment, and finally adding the rest conventional proppant, wherein the quantum dot polymer coating proppant accounts for 1-5% of the total proppant by volume; conventional proppants refer to non-coated proppants such as ceramsite or quartz sand;
the purpose is to ensure that the fluid is fully contacted with the quantum dot polymer coating proppant on one hand; on the other hand, the proppant with the quantum dot polymer coating is prevented from flowing back to a shaft and flowing back;
the concentration of the quantum dot polymer coating proppant is the ratio of the quantum dot polymer coating proppant to the sand-carrying fracturing fluid.
Step 4) during the production of the lower pump-combining layer, measuring the liquid output during the production, and simultaneously sampling the formation fluid; the lower pumping layer production means that the lower oil well pump is put into production after the staged fracturing of the horizontal well;
step 5) treating the collected stratum fluid sample, respectively obtaining a water phase quantum dot sample to be detected and an oil phase quantum dot sample to be detected after oil-water treatment, and obtaining the water production contribution rate of each fracturing section according to the ratio of the quantum dot tracer marker 2 of each layer section in the water phase quantum dot sample to be detected to the total quantum dot tracer marker;
and obtaining the oil production contribution rate of each fracturing segment according to the ratio of the quantum dot tracer marker 2 of each layer segment to the total quantum dot tracer marker in the oil phase quantum dot sample to be detected.
Example 3:
on the basis of embodiment 1, the embodiment provides a staged fracturing yield testing method for a coated horizontal well proppant, wherein the polymer comprises an oil-soluble polymer and a water-soluble polymer, and a tracer is respectively marked in the oil-soluble polymer and the water-soluble polymer and then is uniformly coated on the surface of the proppant in a mixed mode, wherein the molar ratio of the oil-soluble polymer to the water-soluble polymer is 1: 1.
Because the polymer simultaneously comprises the water-soluble polymer and the oil-soluble polymer, the polymer can not be dissolved in the injection process along with the fracturing fluid, and only after the polymer is added into a stratum, the polymer can be slowly dissolved along with the production of an oil well when meeting crude oil and stratum water, so that the film covering agent on the surface of the propping agent is simultaneously oil-soluble and water-soluble, the quantum dot tracer marker 2 marked on the oil-soluble polymer exists in an oil phase, the quantum dot tracer marker 2 marked on the water-soluble polymer exists in a water phase, and the oil-water phase distribution coefficient is stable.
Example 4:
on the basis of embodiment 1, the present embodiment provides a staged fracturing yield testing method for a coated proppant of a horizontal well, and the oil production and water production contribution rates of each interval are obtained through the following processes:
forming a liquid flow with the diameter of 5 microns by using a water phase quantum dot sample to be detected and an oil phase quantum dot sample to be detected, arranging quantum dot tracer markers 2 in a line in the liquid flow, irradiating the liquid flow by using laser, identifying N oil phase quantum dot tracer markers 2 or water phase quantum dot tracer markers 2 in a certain interval, knowing that the total quantity of the oil phase quantum dot tracer markers 2 or the water phase quantum dot tracer markers 2 is M, and obtaining the oil phase or water phase ratio N/M100, namely the oil production contribution rate or the water production contribution rate.
After the pump is put into production, 20-30 samples are taken at the well head, and each sample is 100 ml. Multiple samples were analyzed and the final results averaged.
Example 5:
on the basis of embodiment 1, the embodiment provides a staged fracturing yield testing method for a coated proppant of a horizontal well, and a formation fluid sample treatment process comprises the following steps: treating with ultrasonic equipment at 35 deg.C for 25 min, separating oil and water, centrifuging 10ml water sample in the lower layer at 3000 rpm for 30 min with a centrifuge, and removing impurities in water; filtering the water sample by using a filter material to remove the chroma in the water, and finally obtaining a sample to be detected containing the water-phase quantum dots;
and (3) taking 10ml of oil sample on the upper layer, extracting the oil phase quantum dots into the organic solution, and back-extracting the oil phase quantum dots in the organic solution into water to finally obtain the sample to be detected containing the oil phase quantum dots.
Forming a liquid flow with the diameter of 5 microns by using a water phase quantum dot sample to be detected and an oil phase quantum dot sample to be detected, arranging quantum dot tracer markers 2 in a line in the liquid flow, irradiating the liquid flow by using laser, identifying N oil phase quantum dot tracer markers 2 or water phase quantum dot tracer markers 2 in a certain interval, knowing that the total quantity of the oil phase quantum dot tracer markers 2 or the water phase quantum dot tracer markers 2 is M, and obtaining the oil phase or water phase ratio N/M100, namely the oil production contribution rate or the water production contribution rate.
As shown in fig. 1, a liquid flow with a diameter of 5 microns formed by a water phase quantum dot sample to be measured or an oil phase quantum dot sample to be measured enters a quantum marker indicator 1, markers are arranged in a line in the liquid flow, laser is used for irradiating particles in the liquid flow to generate light scattering, the scattered light enters a light probe 3 after passing through a dichroic mirror 4 and a filter 5, the light probe 3 receives light and converts the light into a signal to be sent to a data processing center 6, and since each quantum dot tracer marker 2 has specific light scattering, a combination of quantum dot tracer markers 2 is finally obtained, so that the oil production contribution rate or the water production contribution rate is obtained. The quantum marker indicator 1 belongs to the prior art.
Example 6:
the embodiment provides a horizontal well tectorial membrane proppant staged fracturing yield testing method, which comprises the following steps:
step 1) selecting the same quantity and types of tracers according to the number of staged fracturing sections of the horizontal well; for example, the construction displacement is 10-12m when the horizontal well A is fractured by 15 sections3Selecting 15 types of quantum dot tracers QD 1-15;
step 2) marking different types of tracers in polymers to obtain different types of quantum dot polymers, and then coating the different types of quantum dot polymers on the surface of a proppant to form different types of quantum dot polymer coating proppants;
step 3) during fracturing construction, loading the quantum dot polymer coating propping agent by using a sand tank truck, adding a sand hopper of the sand mixing truck, adding one quantum dot polymer coating propping agent into each fracturing section along with fracturing fluid, wherein the concentrations of the quantum dot polymer coating propping agents added into each fracturing section are the same; the construction displacement is 10-12m3/min；
Step 4) during the production of the lower pump-combining layer, measuring the liquid output during the production, and simultaneously sampling the formation fluid;
in order to calculate the oil-water ratio of different sampling nodes, the monitoring and the metering are tracked during the production of the lower pumping combination layer, and the liquid outlet amount during normal production is known.
The method comprises the steps of sampling 20-30 samples at a wellhead after a pump is put into production, wherein each sample is 100ml, sampling 10-15 samples at the wellhead when a well is opened and blowout is carried out after horizontal well fracturing, wherein each sample is 50ml, sampling is continued in an oil period, and sampling is carried out 15-20 samples at the wellhead, wherein each sample is 100 ml. The purpose was for comparison. The analytical process is the same.
Step 5) treating the collected stratum fluid sample, respectively obtaining a water phase quantum dot sample to be detected and an oil phase quantum dot sample to be detected after oil-water treatment, and obtaining the water production contribution rate of each fracturing section according to the ratio of the quantum dot tracer marker 2 of each layer section in the water phase quantum dot sample to be detected to the total quantum dot tracer marker;
and obtaining the oil production contribution rate of each fracturing segment according to the ratio of the quantum dot tracer marker 2 of each layer segment to the total quantum dot tracer marker in the oil phase quantum dot sample to be detected.
And (3) calibrating the produced oil-soluble quantum dot tracer marker 2 and the water-soluble quantum dot tracer marker 2 by a laser irradiation method, so as to determine the oil production and the water production in the same section of the horizontal well, namely the contribution of each fracturing section to the production rate of the well.
After the quantum dot polymer coating proppant is subjected to stratum along with fracturing fluid, the quantum dot polymer coating reacts with stratum fluid (the polymer coating is soluble in hydrocarbons and stratum water and is discharged along with produced fluid in the process of producing oil and recovering oil), and the long-term effectiveness is achieved. Experimental results show that in actual production, the quantum dot tracer can be detected in formation fluid within 400 days, the quantum dot tracer is still effective in 1080 days through fitting actual data, the marker is produced through gradual digestion and flow of exploitation time, and the service life is 2 years.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (10)
1. A horizontal well tectorial membrane proppant staged fracturing yield test method is characterized by comprising the following steps:
step 1) selecting different types of tracers for different fracturing sections according to the number of staged fracturing sections of the horizontal well;
step 2) marking different types of tracers in polymers to obtain different types of quantum dot polymers, and forming different types of quantum dot polymer coating proppants by using the different types of quantum dot polymers and the proppants;
step 3) during the fracturing construction of each fracturing section, firstly adding part of the proppant along with the fracturing fluid, then adding one quantum dot polymer coating proppant, and finally adding the rest of the proppant, wherein the concentrations of the quantum dot polymer coating proppants added into each fracturing section are the same;
step 4) during the production of the lower pump-combining layer, measuring the liquid output during the production, and simultaneously sampling the formation fluid;
step 5) treating the collected stratum fluid sample, respectively obtaining a water phase quantum dot sample to be detected and an oil phase quantum dot sample to be detected after oil-water treatment, and obtaining the water production contribution rate of each fracturing section according to the ratio of the quantum dot tracer marker (2) of each layer section in the water phase quantum dot sample to be detected to the total quantum dot tracer marker;
and then obtaining the oil production contribution rate of each fracturing section according to the ratio of the quantum dot tracer marker (2) of each layer section in the oil phase quantum dot sample to be detected to the total quantum dot tracer marker.
2. The horizontal well tectorial membrane proppant staged fracturing yield test method according to claim 1, characterized in that: in the step 3), when the fracturing construction of each fracturing section is carried out, a propping agent is firstly added, when the amount of the added propping agent reaches 80-85% of the total designed supporting amount of the section, the quantum dot polymer coating propping agent is added, and the rest propping agent is added, wherein the quantum dot polymer coating propping agent accounts for 1-5% of the total propping agent by volume.
3. The horizontal well tectorial membrane proppant staged fracturing yield test method according to claim 1, characterized in that: the polymer in the step 2) comprises an oil-soluble polymer and a water-soluble polymer, and the tracer is respectively marked in the oil-soluble polymer and the water-soluble polymer and then is uniformly mixed to be coated on the surface of the proppant, wherein the molar ratio of the oil-soluble polymer to the water-soluble polymer is 1: 1.
4. The horizontal well tectorial membrane proppant staged fracturing yield test method according to claim 1, characterized in that the method for obtaining the water production contribution rate or the oil production contribution rate in step 5) is as follows:
forming a liquid flow with the diameter of 5 microns by using a water phase quantum dot sample to be detected and an oil phase quantum dot sample to be detected, arranging quantum dot tracer markers (2) in a line in the liquid flow, irradiating the liquid flow by using laser to identify the number N of the oil phase quantum dot tracer markers or the water phase quantum dot tracer markers in a certain layer, knowing the total number M of the oil phase quantum dot tracer markers or the water phase quantum dot tracer markers, and obtaining the oil phase or water phase ratio N/M100, namely the oil production contribution rate or the water production contribution rate.
5. The horizontal well tectorial membrane proppant staged fracturing yield test method according to claim 1, characterized in that: the treatment process of the collected formation fluid sample in the step 5) comprises the following steps: firstly, oil-water separation is carried out, and the chroma is removed after impurity removal of a water sample obtained by separation to obtain a sample to be detected containing water-phase quantum dots; and extracting the oil phase quantum dots in the oil sample obtained by separation to obtain a sample to be detected containing the oil phase quantum dots.
6. The horizontal well tectorial membrane proppant staged fracturing yield test method according to claim 1, characterized in that: the concentration of the quantum dot polymer coating proppant in the step 5) is the ratio of the quantum dot polymer coating proppant to the sand-carrying fracturing fluid.
7. The horizontal well tectorial membrane proppant staged fracturing yield test method according to claim 1, characterized in that: during the period of the combined layer production in the step 4), the formation fluid is sampled by 20-30 samples of 100ml each at the well head.
8. The horizontal well tectorial membrane proppant staged fracturing yield testing method according to claim 5, characterized in that the specific process of treating the collected formation fluid sample is as follows: treating with ultrasonic equipment at 35 deg.C for 25 min, separating oil and water, centrifuging 10ml water sample in the lower layer at 3000 rpm for 30 min with a centrifuge, and removing impurities in water; filtering the water sample by using a filter material to remove the chroma in the water, and finally obtaining a sample to be detected containing the water-phase quantum dots;
and (3) taking 10ml of oil sample on the upper layer, extracting the oil phase quantum dots into the organic solution, and back-extracting the oil phase quantum dots in the organic solution into water to finally obtain the sample to be detected containing the oil phase quantum dots.
9. The horizontal well tectorial membrane proppant staged fracturing yield test method according to claim 1, characterized in that: the quantum dot tracer marker (2) in the step 5) is a nanocrystal formed by a tracer through a quantum dot technology.
10. The horizontal well tectorial membrane proppant staged fracturing yield test method according to claim 1, characterized in that: the construction discharge capacity of the fracturing fluid is 10-12m3/min。
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