Aquifer segmentation method for pumping test
By finely segmenting the aquifer and identifying aquitards and non-aquifers based on sedimentary facies and well logging curves, the problem of parameter discrepancies caused by equidistant segmentation was solved, enabling accurate acquisition of hydrogeological parameters and fine exploration.
Patent Information
- Application Number
- CN202410770938.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2044-06-14
AI Technical Summary
In existing technologies, when pumping tests are conducted at equal intervals to divide aquifers, the hydrogeological parameters obtained differ significantly from the actual parameters, resulting in insufficient accuracy in exploration.
By exposing the aquifer, the aquitard is identified based on sedimentary facies, lithology, water-bearing capacity, and water-impermeability. Non-aquifers are analyzed using well logging curves and finely divided into multiple Class I, Class II, and Class III aquifers for precise pumping tests.
It enabled precise exploration of the thick aquifer, obtained accurate hydrogeological parameters, enhanced the pertinence of water control measures, and ensured production safety.
Smart Images
Figure CN118855445B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of hydrogeology, and particularly relates to a method for segmenting an aquifer for pumping test. BACKGROUND
[0002] Pumping test is a main method for determining hydrogeological parameters of an aquifer and understanding hydrogeological conditions, and has great significance for hydrogeological exploration and research. At present, the pumping test of an aquifer includes pumping test of the whole aquifer or segmenting pumping test of the aquifer in the case of thick aquifer.
[0003] In actual conditions, the segmenting pumping test of an aquifer is equal-distance division of pumping segments, for example, the segmenting pumping test of a 200m-thick aquifer is divided into four segments of 50m-thick aquifer, i.e. 0-50m, 50m-100m, 100m-150m and 150m-200m. The above equal-distance division of pumping segments does not consider the actual distribution of the aquifer in hydrogeology, resulting in a large difference between the hydrogeological parameters of each segment obtained by the pumping test and the actual parameters.
[0004] Therefore, how to reasonably divide the pumping segments of an aquifer to obtain accurate hydrogeological parameters during pumping test becomes a problem to be solved at present. SUMMARY
[0005] The present application provides a method for segmenting an aquifer for pumping test, to solve the defect that the hydrogeological parameters of each pumping segment obtained by the equal-distance division of pumping segments in the prior art are greatly different from the actual parameters, and to achieve the purpose of obtaining accurate hydrogeological parameters and finely exploring the aquifer.
[0006] The present application provides a method for segmenting an aquifer for pumping test, comprising the following steps.
[0007] The aquifer is uncovered, the uncovered stratum is divided into a plurality of I-level aquifer segments according to the sedimentary facies of the uncovered stratum, a water-resisting layer is identified in each I-level aquifer segment according to the lithology, water-bearing property and water-resisting property of the uncovered stratum, at least one layer of the water-resisting layer divides the I-level aquifer segment in which the water-resisting layer is located into a plurality of first sub-aquifer segments, and each first sub-aquifer segment is taken as a II-level aquifer segment, whether a non-aquifer layer exists in each II-level aquifer segment is analyzed according to the logging curve, at least one layer of the non-aquifer layer divides the II-level aquifer segment in which the non-aquifer layer is located into a plurality of second sub-aquifer segments, and each second sub-aquifer segment is taken as a III-level aquifer segment, and pumping test is performed on each III-level aquifer segment.
[0008] According to the water-bearing layer segmentation method for pumping test provided by the application, the I-level water-bearing section without the aquiclude is taken as the II-level water-bearing section before analyzing whether the non-water-bearing layer exists according to the logging curve.
[0009] According to the water-bearing layer segmentation method for pumping test provided by the application, the II-level water-bearing section without the non-water-bearing layer is taken as the III-level water-bearing section before pumping test is performed on each III-level water-bearing section.
[0010] According to the water-bearing layer segmentation method for pumping test provided by the application, the thickness of the aquiclude is greater than 3 m and the aquiclude is stably developed.
[0011] According to the water-bearing layer segmentation method for pumping test provided by the application, the logging curve comprises the apparent resistivity curve.
[0012] According to the water-bearing layer segmentation method for pumping test provided by the application, the non-water-bearing layer is analyzed according to the logging curve in each II-level water-bearing section, and the water-bearing section corresponding to the target section curve of the apparent resistivity curve is taken as the non-water-bearing layer in the apparent resistivity curve of each II-level water-bearing section, wherein the change range of the target section curve in the apparent resistivity is greater than a preset range compared with the adjacent section curve.
[0013] According to the water-bearing layer segmentation method for pumping test provided by the application, the disclosed stratum is divided into a plurality of I-level water-bearing sections according to the sedimentary facies of the disclosed stratum, and the disclosed stratum is divided into a plurality of I-level water-bearing sections according to the sedimentary facies of the disclosed stratum.
[0014] According to the water-bearing layer segmentation method for pumping test provided by the application, the disclosed stratum is divided into a plurality of I-level water-bearing sections according to the sedimentary facies of the disclosed stratum, and the disclosed stratum is divided into a plurality of I-level water-bearing sections according to the sedimentary facies of the disclosed stratum.
[0015] According to the water-bearing layer segmentation method for pumping test provided by the application, the disclosed stratum is divided into a plurality of I-level water-bearing sections according to the sedimentary facies of the disclosed stratum, and the disclosed stratum is divided into a plurality of I-level water-bearing sections according to the sedimentary facies of the disclosed stratum.
[0016] According to the water-bearing layer segmentation method for pumping test provided by the application, the thickness of the water-bearing layer is greater than 200 m.
[0017] The application provides a water-bearing layer segmentation method for pumping test, which comprises the following steps: uncovering a water-bearing layer; according to the sedimentary facies of the uncovered stratum, the uncovered stratum is divided into a plurality of I-level water-bearing segments; in each I-level water-bearing segment, a water-resisting layer is identified according to the lithology, water-bearing property and water-resisting property of the uncovered stratum; in the I-level water-bearing segment with at least one water-resisting layer, the I-level water-bearing segment is divided into a plurality of first sub water-bearing segments by the at least one water-resisting layer, and each first sub water-bearing segment is taken as a II-level water-bearing segment; in each II-level water-bearing segment, whether a non-water-bearing layer exists is analyzed according to a well logging curve; in the II-level water-bearing segment with at least one non-water-bearing layer, the II-level water-bearing segment is divided into a plurality of second sub water-bearing segments by the at least one non-water-bearing layer, and each second sub water-bearing segment is taken as a III-level water-bearing segment; and finally, pumping test is carried out on each III-level water-bearing segment. Therefore, the water-bearing layer to be subjected to pumping test can be precisely segmented, pumping test is carried out on each water-bearing segment in the segmentation result, and accurate hydrogeological parameters are obtained, so that the problem that the hydrogeological parameters of each pumping segment obtained by pumping test with equal distance segmentation are greatly different from the actual parameters is effectively solved, the accurate hydrogeological parameters are obtained, and the purpose of fine exploration of the water-bearing layer is achieved. In addition, based on the hydrogeological parameters of each water-bearing segment obtained in the application, targeted water prevention and control measures can be formulated in combination with the hydrogeological characteristics, the targeting of the water prevention and control measures is enhanced, and the production safety is effectively ensured. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.
[0019] Figure 1 is a flowchart of the water-bearing layer segmentation method for pumping test provided by the application.
[0020] Figure 2 is a schematic diagram of the I-level water-bearing segment being divided to obtain a plurality of II-level water-bearing segments in the water-bearing layer segmentation method for pumping test provided by the application.
[0021] Figure 3 is a schematic diagram of the I-level water-bearing segment being divided to obtain a II-level water-bearing segment in the water-bearing layer segmentation method for pumping test provided by the application.
[0022] Figure 4 is a schematic diagram of the II-level water-bearing segment being divided to obtain a plurality of III-level water-bearing segments in the water-bearing layer segmentation method for pumping test provided by the application.
[0023] Figure 5 Figure 2 is a schematic diagram of the method for segmenting aquifer for pumping test according to the present application, which shows the division of a II-level aquifer segment into one III-level aquifer segment. DETAILED DESCRIPTION
[0024] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.
[0025] The method for segmenting aquifer for pumping test according to the present application will be described below with reference to the drawings in the present application. Figures 1-5
[0026] Figure 1 Figure 1 is a schematic diagram of the method for segmenting aquifer for pumping test according to the present application. As shown in Figure 1, the method for segmenting aquifer for pumping test according to the present application includes the following S110-S170. Figure 1
[0027] S110: Uncovering the aquifer.
[0028] For example, the core drilling technology is used to drill to the bottom of the aquifer and uncover the aquifer.
[0029] In some embodiments, the thickness of the aquifer to be uncovered by the present application is greater than or equal to 200m. In actual cases, the greater the thickness of the aquifer, the more complex the actual distribution of the aquifer may be, and the greater the difference between the hydrogeological parameters of each segment obtained by equal-distance division of the pumping segment and the actual difference. Based on this, the present application mainly segments the aquifer with a thickness greater than 200m to achieve the purpose of accurately exploring the thick aquifer (i.e., the aquifer with a thickness greater than 200m).
[0030] S120: Dividing the uncovered stratum into a plurality of I-level aquifer segments according to the sedimentary facies of the uncovered stratum.
[0031] In some embodiments, there are multiple sedimentary facies of the uncovered stratum, in which case the stratum corresponding to each sedimentary facies is taken as one I-level aquifer segment to obtain the above-mentioned plurality of I-level aquifer segments.
[0032] In some embodiments, there is only one sedimentary facies of the uncovered stratum, in which case the uncovered stratum is divided into a plurality of I-level aquifer segments according to the sedimentary subfacies in the uncovered stratum.
[0033] In some embodiments, the exposed stratum has only one sedimentary facies, and in this case, the exposed stratum is divided into a plurality of I-level aquifer sections according to sedimentary microfacies in the exposed stratum.
[0034] A sedimentary subfacies refers to a more specific sedimentary unit that is further subdivided from a sedimentary facies according to the type of sediment, the characteristics of the sedimentary environment, and the accumulation mode of the sediment, and the like. The subdivision of these subfacies helps to better understand the formation process of the sedimentary environment and the accumulation law of the sediment.
[0035] For example, the thickness of the aquifer to be explored is 400 m. From the perspective of sedimentary facies, after the aquifer is exposed, the exposed stratum is a desert facies deposit, that is, the exposed stratum has only one kind of desert facies, and therefore the sedimentary subfacies of the exposed stratum needs to be identified next. From the perspective of sedimentary subfacies, the exposed stratum contains three kinds of sedimentary subfacies, 0-155 m below the top of the aquifer is a dune subfacies deposit, the main lithology is dune sandstone quartz, high content of feldspar, less mica sheet and clay, clean and no impurities; the 155-350 m section below the top of the aquifer is mainly a dune interdune subfacies deposit, and the 350-400 m section below the top of the aquifer is a dry ancient subfacies deposit. Therefore, the exposed stratum is divided into three I-level aquifer sections, which are I1 section of 0-155 m below the top of the aquifer, I2 section of 155-350 m below the top of the aquifer, and I3 section of 350-400 m below the top of the aquifer.
[0036] In some embodiments, the exposed stratum has only one sedimentary subfacies, and in this case, the exposed stratum is divided into a plurality of I-level aquifer sections according to sedimentary microfacies in the exposed stratum.
[0037] In the case where the exposed stratum has only one sedimentary subfacies, the exposed stratum can have a plurality of sedimentary microfacies. Sedimentary microfacies refers to the smallest unit that has unique rock structure, structure, thickness, rhythmicity, and other profile sedimentary characteristics and certain planar configuration law within the range of a sedimentary subfacies belt. The sedimentary microfacies is a division result obtained by further dividing the sedimentary subfacies.
[0038] In the case where the exposed stratum has only one sedimentary subfacies, the stratum corresponding to each sedimentary microfacies in the sedimentary subfacies is taken as an I-level aquifer section, and the above-mentioned plurality of I-level aquifer sections is obtained.
[0039] S130: In each I-level aquifer section, a water-resisting layer is identified according to the lithology, water-bearing property, and water-resisting property of the exposed stratum.
[0040] The lithology, water-bearing property, and water-resisting property of the exposed stratum are analyzed, and a stably developed water-resisting layer is identified.
[0041] In some embodiments, the aquifuge has a thickness of 3m or more (i.e., greater than or equal to 3m), and the stable development is present.
[0042] Figure 2 is one of the schematic diagrams of the method for segmenting the aquifer in the segment pumping test method of the aquifer provided by the present application, in which the I-level aquifer segment is divided into a plurality of II-level aquifer segments, as shown in the figure, for the I1 segment of 0-155m below the top of the aquifer in the above example, the I1 segment has two segments of mudstone with a developed thickness of 3m or more, which are the segment of 88-95m below the top of the aquifer and the segment of 146-155m below the top of the aquifer. In this case, both the segment of 88-95m below the top of the aquifer and the segment of 146-155m below the top of the aquifer are aquifuges. Figure 2
[0043] The thickness of the aquifuge includes but is not limited to 3m or more, for example, it can also be 5m or more, 6m or more, etc.
[0044] S140: In the I-level aquifer segment with at least one aquifuge, the at least one aquifuge divides the I-level aquifer segment in which it is located into a plurality of first sub-aquifer segments, and each first sub-aquifer segment is taken as a II-level aquifer segment.
[0045] For example, as shown in the figure, for the I1 segment of 0-155m below the top of the aquifer in the above example, the I1 segment has two segments of mudstone with a developed thickness of 3m or more, which are the segment of 88-95m below the top of the aquifer and the segment of 146-155m below the top of the aquifer, which divide the I1 segment into two segments, which are the II1 segment of 0-88m below the top of the aquifer and the II2 segment of 95-146m below the top of the aquifer. Figure 2
[0046] For example, corresponding to the I2 segment of 155-350m below the top of the aquifer in the above example, the I2 segment has two segments of mudstone with a developed thickness of 3m or more, which are the segment of 210-220m below the top of the aquifer and the segment of 280-286m below the top of the aquifer. These two segments divide the I2 segment into three segments, which are the II3 segment of 155-210m below the top of the aquifer, the II4 segment of 220-280m below the top of the aquifer, and the II5 segment of 286-350m below the top of the aquifer.
[0047] In some embodiments, the I-level aquifer segment does not have an aquifuge. In this case, the I-level aquifer segment without an aquifuge is taken as a II-level aquifer segment.
[0048] Figure 3 is one of the schematic diagrams of the method for segmenting the aquifer in the segment pumping test method of the aquifer provided by the present application, in which the I-level aquifer segment is divided into a plurality of II-level aquifer segments, as shown in the figure, for the I1 segment of 0-155m below the top of the aquifer in the above example, the I1 segment has two segments of mudstone with a developed thickness of 3m or more, which are the segment of 88-95m below the top of the aquifer and the segment of 146-155m below the top of the aquifer. In this case, both the segment of 88-95m below the top of the aquifer and the segment of 146-155m below the top of the aquifer are aquifuges. Figure 3 As shown, corresponding to the I3 section of 350m-400m below the top of the aquifer in the above example, no stable 3m or more mudstone develops therein, therefore the I3 section is not divided, and the I3 section is taken as a II-level aquifer section II6 section, and the II6 section is an aquifer section of 350m-400m below the top of the aquifer.
[0049] S150: In each II-level aquifer section, whether a non-aquifer layer exists is analyzed according to a logging curve.
[0050] The logging curve characteristic refers to a curve formed during logging and reflecting different lithology and horizon characteristics, and then judging specific lithology, horizon and the like according to the obtained curve. The logging curve may be, for example, a apparent resistivity curve or other characteristic curve capable of reflecting hydrogeological water abundance. For example, it may also be a resistivity curve. In the embodiment of the present application, the water abundance similar sections are divided into an aquifer section according to the logging curve characteristic.
[0051] The relationship between the apparent resistivity and the water abundance is that the lower the apparent resistivity, the better the water abundance, and the higher the apparent resistivity, the worse the water abundance. Based on this, if the apparent resistivity of a certain section of stratum is very high compared with other sections of stratum, it can be considered that the water abundance of the section of stratum is not similar to that of other sections, and the section of stratum is a non-aquifer layer.
[0052] In the apparent resistivity curve of each II-level aquifer section, the aquifer section corresponding to the target section curve of the apparent resistivity curve is taken as a non-aquifer layer. The change amplitude of the target section curve in the apparent resistivity is greater than a preset amplitude compared with the adjacent section curve.
[0053] In the embodiment of the present application, the identification of the target section curve can be directly identified by human observation. For example, the apparent resistivity curve of any II-level aquifer section is analyzed, and the aquifer section corresponding to the obviously higher target section curve in the apparent resistivity curve is taken as a non-aquifer layer by human observation.
[0054] The identification of the target section curve can also be realized by calculating the related values of the apparent resistivity curve. For example, the difference between the apparent resistivity in the target section and the bottom end apparent resistivity in the apparent resistivity curve where the target section is located is greater than a preset difference, and the bottom end apparent resistivity is less than other apparent resistivities in the apparent resistivity curve where the target section is located.
[0055] S160: In the II-level aquifer section with at least one non-aquifer layer, the at least one non-aquifer layer divides the II-level aquifer section into a plurality of second sub-aquifer sections, and each second sub-aquifer section is taken as a III-level aquifer section.
[0056] Figure 4This is one of the schematic diagrams illustrating the division of aquifer II into multiple aquifer III sections in the segmented pumping test method provided by this invention. Figure 4 As shown, in the example above, within section II1 (0-88m below the top of the aquifer), the apparent resistivity of the section 36m-55m below the top of the aquifer is significantly higher than that of other sections in section II1. The section 36m-55m below the top of the aquifer divides section II1 into two sections: section III1 (0-36m below the top of the aquifer) and section III2 (55m-88m below the top of the aquifer). Thus, two Class III aquifer sections, III1 and III2, can be obtained.
[0057] In some embodiments, based on the logging curve, it can be determined that there is no non-aquifer in a certain Class II aquifer. In this case, the Class II aquifer without a non-aquifer is regarded as a Class III aquifer.
[0058] Figure 5 This is one of the schematic diagrams illustrating the division of a Class II aquifer into a Class III aquifer in the segmented pumping test method provided by this invention. Figure 5 As shown, in the above example, the apparent resistivity of the II2 section (95m-146m below the top of the aquifer) is low, and there is no obviously high aquifer section. Therefore, the II2 section is not divided, but is regarded as a Class III aquifer section III3. The III3 section is the aquifer section 95m-146m below the top of the aquifer.
[0059] Continuing the example, in the II3 section (155m-210m below the top of the aquifer) in the above example, the apparent resistivity of the section 172m-179m below the top of the aquifer is significantly higher than that of other sections in the II3 section. The section 172m-179m below the top of the aquifer divides the II3 section into two sections: the III4 section (155m-172m below the top of the aquifer) and the III5 section (179m-210m below the top of the aquifer). Thus, we can obtain two Class III aquifer sections, III4 and III5.
[0060] Continuing with the example, in the II4 section (220m-280m below the top of the aquifer) in the above example, the apparent resistivity is low and there is no obviously high aquifer section. Therefore, the II4 section is not divided. Instead, the II4 section is regarded as a Class III aquifer section III6, which is the aquifer section 220m-280m below the top of the aquifer.
[0061] Continuing the example, within the II5 segment (286m-350m below the top of the aquifer) in the above example, the apparent resistivity within the 296m-302m segment below the top of the aquifer, and the apparent resistivity within the 326m-330m segment below the top of the aquifer are relatively high, which divide the II5 segment into three segments, namely the III7 segment (280m-296m below the top of the aquifer), the III8 segment (302m-326m below the top of the aquifer), and the III9 segment (330m-350m below the top of the aquifer), thus obtaining the III7 segment, the III8 segment, and the III9 segment as three III-level aquifer segments.
[0062] Continuing the example, within the II6 segment (350m-400m below the top of the aquifer) in the above example, the apparent resistivity is relatively low, and there is no obviously higher aquifer segment, thus the II6 segment is not divided, and the II6 segment is taken as a III-level aquifer segment III 10 segment, the III 10 segment is an aquifer segment (350m-400m below the top of the aquifer).
[0063] Based on the data in the above example, the 400m aquifer can be divided into the following 10 III-level aquifer segments.
[0064] III1: 0-36m below the top of the aquifer.
[0065] III2: 55m-88m below the top of the aquifer.
[0066] III3: 95m-146m below the top of the aquifer.
[0067] III4: 155m-172m below the top of the aquifer.
[0068] III5: 179m-210m below the top of the aquifer.
[0069] III6: 220m-280m below the top of the aquifer.
[0070] III7: 280m-296m below the top of the aquifer.
[0071] III8: 302m-326m below the top of the aquifer.
[0072] III9: 330m-350m below the top of the aquifer.
[0073] III 10 : 350m-400m below the top of the aquifer.
[0074] S170: Perform a pumping test on each III-level aquifer segment.
[0075] For example, the above III1-III 10 The water pumping test is carried out on each III level water-bearing section. Through S110-S170, the aquifer section in the thick aquifer is screened more accurately by excluding the aquifuge and non-aquifer from the exposed stratum after the aquifer is uncovered, and the purpose of fine hydrogeological exploration of the aquifer is achieved.
[0076] The present application has the following beneficial effects:
[0077] (1) A segmentation method of thick aquifer is proposed, and the purpose of accurate segmentation of thick aquifer water pumping test section is achieved.
[0078] (2) After the thick aquifer is segmented according to this method, the water pumping test is carried out on each section, and the purpose of fine exploration of thick aquifer is achieved.
[0079] (3) It is beneficial to formulate targeted water prevention and control measures according to the hydrogeological parameters and characteristics of each water-bearing section, and to enhance the pertinence of water prevention and control measures.
[0080] (4) The accuracy of hydrogeological exploration of thick aquifer is enhanced, and the benefit is increased.
[0081] The water-bearing layer segmentation method for water pumping test provided by the present application, by uncovering the aquifer, then according to the sedimentary facies of the exposed stratum, the exposed stratum is divided into a plurality of I level water-bearing sections, in each I level water-bearing section, according to the lithology, water-bearing property and water-resisting property of the exposed stratum, the aquifuge is identified, in the I level water-bearing section with at least one aquifuge, the I level water-bearing section is divided into a plurality of first sub water-bearing sections by at least one aquifuge, and each first sub water-bearing section is taken as a II level water-bearing section, in each II level water-bearing section, whether there is a non-aquifer layer is analyzed according to the logging curve, in the II level water-bearing section with at least one non-aquifer layer, the II level water-bearing section is divided into a plurality of second sub water-bearing sections by at least one non-aquifer layer, and each second sub water-bearing section is taken as a III level water-bearing section, and finally the water pumping test is carried out on each III level water-bearing section. As can be seen, the present application can accurately segment the water-bearing layer to be pumped, and the water pumping test is carried out on each water-bearing section in the segmentation result, so as to obtain accurate hydrogeological parameters, effectively solve the problem that the hydrogeological parameters of each pumping section obtained by pumping test at equal distance are greatly different from the actual parameters, achieve the purpose of obtaining accurate hydrogeological parameters and fine exploration of the aquifer. In addition, based on the hydrogeological parameters of each water-bearing section obtained in the present application, targeted water prevention and control measures can be formulated combined with the hydrogeological characteristics, the pertinence of water prevention and control measures is enhanced, and the production safety is effectively guaranteed.
[0082] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features therein can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A method for segmenting aquifers for pumping tests, characterized in that, include: Expose the aquifer; Based on the sedimentary facies of the exposed strata, the exposed strata are divided into multiple Class I aquifers; In each Class I aquifer, the aquitard is identified based on the lithology, water-bearing capacity, and aquitard properties of the exposed strata. In a Class I aquifer with at least one water-proof layer, the water-proof layer divides the Class I aquifer into multiple first sub-aquifers, and each first sub-aquifer is regarded as a Class II aquifer. In each Class II aquifer, the presence of non-aquifers is analyzed based on well logging curves; The logging curves include: apparent resistivity curves; The analysis of whether non-aquifers exist in each Class II aquifer based on well logging curves includes: In the apparent resistivity curve of each Class II aquifer, the aquifer corresponding to the target segment of the apparent resistivity curve is taken as the non-aquifer. Wherein, the target segment curve has a greater change in apparent resistivity than the adjacent segment curves; In a Class II aquifer with at least one non-aquifer, the at least one non-aquifer divides the Class II aquifer into multiple second sub-aquifers, and each second sub-aquifer is treated as a Class III aquifer. Pumping tests were conducted on each Class III aquifer.
2. The aquifer segmentation method for pumping tests according to claim 1, characterized in that, Before analyzing the presence of non-aquifers based on well logging curves in each Class II aquifer, the process also includes: The Class I aquifer that does not have the impermeable layer is considered as the Class II aquifer.
3. The aquifer segmentation method for pumping tests according to claim 1, characterized in that, Before conducting pumping tests on each Class III aquifer, the following steps are also included: The Class II aquifer that does not have the aforementioned non-aquifer is considered as the Class III aquifer.
4. The aquifer segmentation method for pumping tests according to claim 1, characterized in that, The thickness of the waterproof layer is more than 3m and it is stably developed.
5. The aquifer segmentation method for pumping tests according to claim 1, characterized in that, The process of dividing the exposed strata into multiple Class I aquifers based on their sedimentary facies includes: When the exposed strata have multiple sedimentary facies, each sedimentary stratum is considered as a Class I aquifer, thus obtaining the multiple Class I aquifers.
6. The aquifer segmentation method for pumping tests according to claim 1, characterized in that, The process of dividing the exposed strata into multiple Class I aquifers based on their sedimentary facies includes: When the exposed strata contain only one sedimentary facies, the exposed strata are divided into multiple Class I aquifers based on the sedimentary subfacies within them.
7. The aquifer segmentation method for pumping tests according to claim 6, characterized in that, The exposed strata are divided into multiple Class I aquifers based on the sedimentary subfacies within them, including: When the exposed strata contain only one sedimentary subfacies, the exposed strata are divided into multiple Class I aquifers based on the sedimentary microfacies within them.
8. The aquifer segmentation method for pumping tests according to any one of claims 1-7, characterized in that, The thickness of the aquifer is over 200m.