Water identification system and method based on multi-parameter joint discrimination

Abstract

The invention relates to a water identification method based on multi-parameter joint discrimination. The method comprises the following steps: respectively determining respective water identification sensitive parameters of a gas logging technology, an ion chromatography technology, a light hydrocarbon technology and a non-hydrocarbon technology; respectively establishing interpretation standards corresponding to the water identification sensitive parameters of the gas logging technology, the water identification sensitive parameters of the ion chromatography technology, the water identification sensitive parameters of the light hydrocarbon technology and the water identification sensitive parameters of the non-hydrocarbon technology; determining a water identification reliability sequence of a gas logging technology, an ion chromatography technology, a light hydrocarbon technology and a non-hydrocarbon technology; and judging the water layer based on the determined water identification reliability sequence and the established interpretation standard corresponding to each water identification sensitive parameter. According to the method, fusion and integration of the advantages of emerging and traditional water identification technologies are realized, the reservoir water content identification accuracy is improved, the coincidence rate of fluid property interpretation of the tight sandstone oil and gas reservoir and the carbonate rock oil and gas reservoir is improved, efficient exploration and development of the two types of oil and gas reservoirs are facilitated, and a large amount of funds are saved.

Description

Technical Field

[0001] The present invention generally belongs to the low permeability oil and gas reservoir development technology in the field of petroleum development, and more specifically, relates to a water identification system and method based on multi-parameter joint discrimination. Background Art

[0002] Tight sandstone oil and gas reservoirs and carbonate oil and gas reservoirs have become the focus of domestic oil and gas exploration and development. A notable feature of this type of oil and gas exploration and development is the high accuracy requirement for reservoir fluid property evaluation, because the accuracy of the evaluation is directly related to whether the subsequent oil and gas testing work worth hundreds of thousands, millions or even tens of millions of investments can produce economically considerable oil and gas output. However, the actual situation shows that the exploration and development of tight sandstone oil and gas reservoirs and carbonate oil and gas reservoirs still face the problem of low compliance rate in reservoir fluid property identification and evaluation, which is particularly reflected in the difficulty of identifying water, which has greatly interfered with the decision-making of the construction party and caused a large amount of invalid investment. Therefore, the rapid and accurate identification and evaluation of whether the reservoir contains water is a key technical problem that needs to be solved in the exploration and development of tight sandstone oil and gas reservoirs and carbonate oil and gas reservoirs.

[0003] Identifying water content in tight sandstone and carbonate reservoirs is an industry-wide problem. Due to the influence of the lithology and physical properties of such reservoirs, logging technology is almost "incapable" of identifying water content in such reservoirs. Therefore, the industry currently mainly relies on some scattered and unsystematic logging techniques combined with some logging curves to roughly judge whether the reservoir contains water. Commonly used sporadic logging techniques include gas logging and drilling fluid performance monitoring. By observing the changes in the abnormal height of gas logging and the relationship between the composition ratios, combined with the changes in the temperature, density, and conductivity of the drilling fluid, it is possible to judge whether the reservoir contains water. However, the technical solution has low accuracy and the effect is not ideal, which is not satisfactory to the oilfield construction party.

[0004] Therefore, the prior art needs to be improved. Summary of the invention

[0005] The present invention aims to solve the problem of whether the reservoir contains water during the exploration and development of tight sandstone oil and gas reservoirs and carbonate oil and gas reservoirs. This problem seriously restricts the efficient exploration and development of tight sandstone oil and gas reservoirs and carbonate oil and gas reservoirs, resulting in a large amount of ineffective investment. Based on this, the present invention proposes a water identification system and method based on multi-parameter joint discrimination. The inventor of the present invention introduces emerging water identification technical means and combines traditional water identification technical means to invent and innovate, forming a water identification method based on multi-technology, multi-parameter, and joint discrimination. The technology involved in the system and method of the present invention includes gas measurement, ion chromatography, light hydrocarbon and non-hydrocarbon detection technology, and the parameters involved include humidity ratio, hydrocarbon slope, relative methane content, relative carbon dioxide content, toluene index, total mineralization, water type, etc. These technologies have certain water identification capabilities in principle, and these parameters are sensitive to water. This is also the fundamental reason why the system and method of the present invention can better solve the water identification problem, and it is also the technical support of the system and method of the present invention.

[0006] The technical solution adopted by the present invention is as follows:

[0007] According to one aspect of the present invention, a water identification method based on multi-parameter joint discrimination is provided, comprising the following steps:

[0008] 1) Determine the water identification sensitive parameters of gas detection technology, ion chromatography technology, light hydrocarbon technology and non-hydrocarbon technology respectively;

[0009] 2) Establish corresponding interpretation standards for water identification sensitive parameters of gas detection technology, water identification sensitive parameters of ion chromatography technology, water identification sensitive parameters of light hydrocarbon technology and water identification sensitive parameters of non-hydrocarbon technology;

[0010] 3) Establish the reliability ranking of water identification among gas testing technology, ion chromatography technology, light hydrocarbon technology, and non-hydrocarbon technology;

[0011] 4) Identify water layers based on the established water identification reliability ranking and the interpretation criteria corresponding to each water identification sensitive parameter.

[0012] In one embodiment of the present invention, in step 1), the water identification sensitive parameters of the gas measurement technology include the moisture ratio change rate and the hydrocarbon slope change rate.

[0013] In one embodiment of the present invention, the humidity ratio change rate and the hydrocarbon slope change rate are calculated by the following formulas:

[0014] Humidity ratio = air measurement C 2+ / Gas Test C 1+ ;

[0015] Hydrocarbon slope = gas-tested C2 / gas-tested C3;

[0016] Humidity ratio change rate = (humidity ratio - base value) / base value;

[0017] Hydrocarbon slope change rate = (hydrocarbon slope - base value) / base value,

[0018] wherein, in the above formula, C 1+ represents the sum of the contents of C1 to C5, C 2+ represents the sum of the contents of C2 to C5, C1 represents the content of methane, C2 represents the content of ethane, C3 represents the content of propane, C4 represents the content of butane, and C5 represents the content of pentane.

[0019] In an embodiment of the present invention, in step 1), the water identification sensitive parameters of the ion chromatography technique include the absolute value of the total salinity change rate and the water type.

[0020] In an embodiment of the present invention, the water type is determined by calculation according to the Schoeller classification based on the ion chromatography analysis results, and the absolute value of the total salinity change rate is calculated by the following formula:

[0021] Total salinity = the sum of the contents of each ion analyzed by ion chromatography;

[0022] Absolute value of total salinity change rate = |(total salinity - base value) / base value|.

[0023] In an embodiment of the present invention, in step 1), the water identification sensitive parameters of the light hydrocarbon technique include the change amount of the relative content of methane and the change amount of the toluene index.

[0024] In an embodiment of the present invention, the change amount of the relative content of methane and the change amount of the toluene index are calculated by the following formulas respectively:

[0025] Relative content of methane = content of methane / total hydrocarbon content;

[0026] Change amount of relative content of methane = relative content of methane - base value;

[0027] Change amount of toluene index = toluene index - base value.

[0028] In an embodiment of the present invention, in step 1), the water identification sensitive parameters of the non-hydrocarbon technique include the content of CO2 and the change rate of the content of CO2.

[0029] In an embodiment of the present invention, the change rate of the content of CO2 is calculated by the following formula:

[0030] Change rate of CO2 content = (content of CO2 - base value) / base value.

[0031] In an embodiment of the present invention, in step 2), the interpretation standard corresponding to the water identification sensitive parameters of the gas logging technique is:

[0032] If the moisture ratio change rate is ≤-40% and the hydrocarbon slope change rate is ≥35%, it is determined to be an aquifer, otherwise it is determined to be a non-aquifer.

[0033] In one embodiment of the present invention, in step 2), the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is:

[0034] If the absolute value of the total mineralization change rate is greater than 100% and the calculated water type is consistent with the regional formation water type, it is determined to be an aquifer, otherwise it is determined to be a non-aquifer.

[0035] In one embodiment of the present invention, in step 2), the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is:

[0036] If the change in relative methane content is greater than 0 and the change in toluene index is greater than 1, it is determined to be an aquifer, otherwise it is determined to be a non-aquifer.

[0037] In one embodiment of the present invention, in step 2), the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is:

[0038] If the CO2 content change rate is ≥ 5 and 5% ≤ CO2 content ≤ 50%, it is determined to be an aquifer, otherwise it is determined to be a non-aquifer.

[0039] In one embodiment of the present invention, in step 3), the reliability ranking of water identification of the established gas detection technology, ion chromatography technology, light hydrocarbon technology and non-hydrocarbon technology is: ion chromatography technology > gas detection technology > light hydrocarbon technology > non-hydrocarbon technology.

[0040] In one embodiment of the present invention, in step 4), determining the water layer includes determining the aquifer, determining the suspected aquifer, and determining the non-aquifer.

[0041] In one embodiment of the present invention, determining the aquifer includes:

[0042] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is non-aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is aquifer, then the comprehensive interpretation conclusion is aquifer;

[0043] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is aquifer, then the comprehensive interpretation conclusion is aquifer;

[0044] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is non-aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is aquifer, then the comprehensive interpretation conclusion is aquifer;

[0045] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is aquifer, then the comprehensive interpretation conclusion is aquifer;

[0046] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is non-aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is aquifer, then the comprehensive interpretation conclusion is aquifer;

[0047] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is non-aquifer, then the comprehensive interpretation conclusion is aquifer;

[0048] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is aquifer, then the comprehensive interpretation conclusion is aquifer;

[0049] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is non-aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is aquifer, then the comprehensive interpretation conclusion is aquifer;

[0050] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is an aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is an aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is an aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is a non-aquifer, then the comprehensive interpretation conclusion is an aquifer;

[0051] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the gas detection technology is an aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the non-hydrocarbon technology is an aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the light hydrocarbon technology is an aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the ion chromatography technology is an aquifer, then the comprehensive interpretation conclusion is an aquifer.

[0052] In one embodiment of the present invention, determining a suspicious aquifer includes:

[0053] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is non-aquifer, then the comprehensive interpretation conclusion is a suspected aquifer;

[0054] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is non-aquifer, then the comprehensive interpretation conclusion is a suspected aquifer;

[0055] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is non-aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is non-aquifer, then the comprehensive interpretation conclusion is a suspected aquifer;

[0056] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the gas detection technology is an aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the non-hydrocarbon technology is an aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the light hydrocarbon technology is a non-aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the ion chromatography technology is a non-aquifer, then the comprehensive interpretation conclusion is a suspected aquifer.

[0057] In one embodiment of the present invention, determining the non-aquifer comprises:

[0058] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is non-aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is non-aquifer, then the comprehensive interpretation conclusion is non-aquifer;

[0059] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the gas detection technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the non-hydrocarbon technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the light hydrocarbon technology is non-aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the ion chromatography technology is non-aquifer, then the comprehensive interpretation conclusion is non-aquifer.

[0060] According to another aspect of the present invention, there is provided a water identification system based on multi-parameter joint discrimination, comprising:

[0061] A first module, the first module is configured to respectively determine water identification sensitive parameters of gas detection technology, ion chromatography technology, light hydrocarbon technology and non-hydrocarbon technology;

[0062] The second module is configured to respectively establish interpretation standards corresponding to water identification sensitive parameters of gas detection technology, water identification sensitive parameters of ion chromatography technology, water identification sensitive parameters of light hydrocarbon technology, and water identification sensitive parameters of non-hydrocarbon technology;

[0063] A third module configured to establish a water identification reliability ranking of the gas detection technology, the ion chromatography technology, the light hydrocarbon technology, and the non-hydrocarbon technology; and

[0064] The fourth module is configured to identify the water layer based on the established water identification reliability ranking and the established interpretation standards corresponding to each water identification sensitive parameter.

[0065] By adopting the above technical solution, the present invention has at least the following beneficial effects:

[0066] The present invention integrates gas measurement, ion chromatography, light hydrocarbon and non-hydrocarbon detection technologies, deeply analyzes the response characteristics of relevant parameters of various technologies on changes in fluid properties in tight sandstone oil and gas reservoirs and carbonate oil and gas reservoirs, screens water identification sensitive parameters, and comprehensively determines the reliability ranking of various technical parameters in water identification and judgment, and establishes a water identification method based on the joint judgment of multiple parameters of the above four technologies.

[0067] The present invention applies more, broader and newer technologies, and the coordination and comprehensive analysis of various technologies are more systematic and logical, and is more sophisticated, complex, rigorous and strict than the existing technology.

[0068] The present invention realizes for the first time the integration of the advantages of emerging and traditional water identification technologies, improves the accuracy of reservoir water identification (from 50.6% to 88.7%), and improves the consistency of fluid property interpretation in tight sandstone oil and gas reservoirs and carbonate oil and gas reservoirs (from 76.3% to 83.5%), which is beneficial to promoting the efficient exploration and development of these two types of oil and gas reservoirs and saving a large amount of funds; and the present invention has a good application effect in water identification in the tight sandstone gas reservoirs of Changqing Oilfield and the carbonate oil and gas reservoirs of Dagang Oilfield. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0070] Figure 1 A schematic flow chart of a water identification method based on multi-parameter joint discrimination provided by the present invention is shown;

[0071] Figure 2 This is a diagram of the comprehensive interpretation and evaluation results of the well logging in the Qiantan 2 well in an embodiment of the present invention. DETAILED DESCRIPTION

[0072] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0073] like Figure 1 As shown, the present invention provides a water identification method based on multi-parameter joint discrimination, comprising the following steps:

[0074] Step S101: respectively determining water identification sensitive parameters of gas detection technology, ion chromatography technology, light hydrocarbon technology and non-hydrocarbon technology;

[0075] Step S102: establishing interpretation standards corresponding to water identification sensitive parameters of gas detection technology, water identification sensitive parameters of ion chromatography technology, water identification sensitive parameters of light hydrocarbon technology, and water identification sensitive parameters of non-hydrocarbon technology respectively;

[0076] Step S103: establishing the reliability ranking of water identification among gas detection technology, ion chromatography technology, light hydrocarbon technology and non-hydrocarbon technology;

[0077] Step S104: Determine the water layer based on the established ranking of water identification reliability and the established interpretation criteria corresponding to each water identification sensitive parameter.

[0078] The present invention integrates gas logging, ion chromatography, light hydrocarbon and non-hydrocarbon detection technologies, deeply analyzes the response characteristics of relevant parameters of each technology to the changes in fluid properties in tight sandstone oil and gas reservoirs and carbonate rock oil and gas reservoirs, screens water identification sensitive parameters, comprehensively judges the reliability of each technology parameter in water identification, and establishes a water identification method based on the joint discrimination of multiple parameters of the above four technologies. The present invention realizes the integration of the advantages of emerging and traditional water identification technologies, improves the accuracy of reservoir water content identification, increases the coincidence rate of fluid property interpretation in tight sandstone oil and gas reservoirs and carbonate rock oil and gas reservoirs, effectively promotes the profitable exploration and development of the two types of oil and gas reservoirs, and saves a large amount of funds.

[0079] In the above method, in step S101:

[0080] The water identification sensitive parameters of gas logging technology include the humidity ratio change rate and the hydrocarbon slope change rate, where the humidity ratio change rate and the hydrocarbon slope change rate are calculated by the following formulas respectively:

[0081] Humidity ratio = Gas logging C 2+ / Gas logging C 1+ ;

[0082] Hydrocarbon slope = Gas logging C2 / Gas logging C3;

[0083] Humidity ratio change rate = (Humidity ratio - Base value) / Base value;

[0084] Hydrocarbon slope change rate = (Hydrocarbon slope - Base value) / Base value,

[0085] where, in the above formulas, C 1+ represents the sum of the contents of C1 to C5, C 2+ represents the sum of the contents of C2 to C5, C1 represents the content of methane, C2 represents the content of ethane, C3 represents the content of propane, C4 represents the content of butane, and C5 represents the content of pentane.

[0086] The water identification sensitive parameters of ion chromatography technology include the absolute value of the total salinity change rate and the water type, where the water type is calculated and determined according to the Schilling classification based on the ion chromatography analysis results, and the absolute value of the total salinity change rate is calculated by the following formula:

[0087] Total salinity = The sum of the contents of each ion analyzed by ion chromatography;

[0088] Absolute value of total salinity change rate = 丨(Total salinity - Base value) / Base value丨.

[0089] The water identification sensitive parameters of light hydrocarbon technology include the change in relative methane content and the change in toluene index, where the change in relative methane content and the change in toluene index are calculated by the following formulas:

[0090] Relative methane content = methane content / total hydrocarbon content;

[0091] Change in relative methane content = relative methane content - base value;

[0092] Toluene index change = toluene index - base value.

[0093] The water identification sensitive parameters of non-hydrocarbon technology include CO2 content and CO2 content change rate, where the CO2 content change rate is calculated by the following formula:

[0094] CO2 content change rate = (CO2 content - base value) / base value.

[0095] In the above method, in step S102:

[0096] The interpretation standards corresponding to the water identification sensitive parameters of gas measurement technology are:

[0097] If the moisture ratio change rate is ≤-40% and the hydrocarbon slope change rate is ≥35%, it is determined to be an aquifer, otherwise it is determined to be a non-aquifer.

[0098] The interpretation standards corresponding to the water identification sensitive parameters of ion chromatography technology are:

[0099] If the absolute value of the total mineralization change rate is greater than 100% and the calculated water type is consistent with the regional formation water type, it is determined to be an aquifer, otherwise it is determined to be a non-aquifer.

[0100] The interpretation standards corresponding to the water identification sensitive parameters of light hydrocarbon technology are:

[0101] If the change in relative methane content is greater than 0 and the change in toluene index is greater than 1, it is determined to be an aquifer, otherwise it is determined to be a non-aquifer.

[0102] The interpretation criteria corresponding to the water identification sensitive parameters of non-hydrocarbon technology are:

[0103] If the CO2 content change rate is ≥ 5 and 5% ≤ CO2 content ≤ 50%, it is determined to be an aquifer, otherwise it is determined to be a non-aquifer.

[0104] In the above method, in step S103:

[0105] The established reliability ranking of water identification among gas detection technology, ion chromatography technology, light hydrocarbon technology and non-hydrocarbon technology is: ion chromatography technology > gas detection technology > light hydrocarbon technology > non-hydrocarbon technology.

[0106] In the above method, in step S104:

[0107] Identification of water layers includes identification of aquifers, identification of suspected aquifers and identification of non-aquifers, among which:

[0108] Aquifer determination includes:

[0109] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is non-aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is aquifer, then the comprehensive interpretation conclusion is aquifer;

[0110] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is aquifer, then the comprehensive interpretation conclusion is aquifer;

[0111] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is non-aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is aquifer, then the comprehensive interpretation conclusion is aquifer;

[0112] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is aquifer, then the comprehensive interpretation conclusion is aquifer;

[0113] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is non-aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is aquifer, then the comprehensive interpretation conclusion is aquifer;

[0114] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is non-aquifer, then the comprehensive interpretation conclusion is aquifer;

[0115] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is aquifer, then the comprehensive interpretation conclusion is aquifer;

[0116] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is non-aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is aquifer, then the comprehensive interpretation conclusion is aquifer;

[0117] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is an aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is an aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is an aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is a non-aquifer, then the comprehensive interpretation conclusion is an aquifer;

[0118] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the gas detection technology is an aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the non-hydrocarbon technology is an aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the light hydrocarbon technology is an aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the ion chromatography technology is an aquifer, then the comprehensive interpretation conclusion is an aquifer.

[0119] Suspicious aquifers include:

[0120] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is non-aquifer, then the comprehensive interpretation conclusion is a suspected aquifer;

[0121] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is non-aquifer, then the comprehensive interpretation conclusion is a suspected aquifer;

[0122] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is non-aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is non-aquifer, then the comprehensive interpretation conclusion is a suspected aquifer;

[0123] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the gas detection technology is an aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the non-hydrocarbon technology is an aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the light hydrocarbon technology is a non-aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the ion chromatography technology is a non-aquifer, then the comprehensive interpretation conclusion is a suspected aquifer.

[0124] The determination of non-aquifers includes:

[0125] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is non-aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is non-aquifer, then the comprehensive interpretation conclusion is non-aquifer;

[0126] If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the gas detection technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the non-hydrocarbon technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the light hydrocarbon technology is non-aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the ion chromatography technology is non-aquifer, then the comprehensive interpretation conclusion is non-aquifer.

[0127] In addition, the present invention also relates to a water identification system using the above method, comprising:

[0128] A first module, the first module is configured to respectively determine water identification sensitive parameters of gas detection technology, ion chromatography technology, light hydrocarbon technology and non-hydrocarbon technology;

[0129] The second module is configured to respectively establish interpretation standards corresponding to water identification sensitive parameters of gas detection technology, water identification sensitive parameters of ion chromatography technology, water identification sensitive parameters of light hydrocarbon technology, and water identification sensitive parameters of non-hydrocarbon technology;

[0130] A third module configured to establish a water identification reliability ranking of the gas detection technology, the ion chromatography technology, the light hydrocarbon technology, and the non-hydrocarbon technology; and

[0131] The fourth module is configured to identify the water layer based on the established water identification reliability ranking and the established interpretation standards corresponding to each water identification sensitive parameter.

[0132] More specifically, the above method of the present invention was implemented, and the method of the present invention was not only tested and applied in the Sulige gas field, but also applied on-site in the Paleozoic carbonate formation in the Qiantan 2 well of the Qianmiqiao buried hill in the Dagang Oilfield, and achieved obvious results. The Paleozoic carbonate formation in the Qiantan 2 well was comprehensively applied with logging techniques such as gas logging, ion chromatography, light hydrocarbon and non-hydrocarbon detection, providing an excellent platform for the verification application of the present invention.

[0133] like Figure 2 As shown in the figure, the gas logging anomaly of the Fengfeng Formation in Qiantan 2 Well is generally low, the combination of humidity ratio and hydrocarbon slope is relatively stable; the total mineralization of ion chromatography varies greatly, and the calculated water type is consistent with the regional water type; the relative content of light hydrocarbon methane is high; and the CO2 content is low. Combined with the method of the present invention, it is comprehensively judged that there is an aquifer in the Fengfeng Formation of Qiantan 2 Well, and the final interpretation conclusion is that there is 1 aquifer (see Figure 2 The No. 123 layer interpreted in the well logging was confirmed to be a water layer by acid fracturing gas testing.

[0134] The gas logging of the upper Majiagou Formation in Qiantan 2 well is abnormally low, and the combination of humidity ratio and hydrocarbon slope is relatively stable; the total mineralization of ion chromatography is high in the local well section, and the calculated water type is consistent with the regional water type; the relative content of light hydrocarbon methane is high and the value is stable; the CO2 content is low. Combined with the method of the present invention, it is comprehensively judged that the probability of water content in this set of reservoirs is high, and the interpretation conclusion is 2 layers of aquifers.

[0135] The gas logging in the middle of the upper Majiagou Formation in Qiantan 2 well is abnormally high, the combination of humidity ratio and hydrocarbon slope is relatively stable, and the local variation is large; the ion chromatography total mineralization base value is generally higher than that of the upper formation, and the calculated water type is consistent with the regional water type; the relative content of light hydrocarbon methane is high and the value is stable; the CO2 content is abnormally high locally. Combined with the method of the present invention, it is comprehensively judged that the probability of water content in this set of reservoirs is high, and the interpretation conclusion is 1 suspected / probable water layer, which is proved to be a water layer by gas testing.

[0136] Therefore, through the above-mentioned embodiments of the present invention, the present invention introduces emerging water identification technology means and combines traditional water identification technology means to invent and innovate, forming a water identification system and method based on multiple technologies, multiple parameters, and joint discrimination. The technology involved in the system and method of the present invention includes gas measurement, ion chromatography, light hydrocarbon and non-hydrocarbon detection technology, and the parameters involved include humidity ratio, hydrocarbon slope, relative methane content, relative carbon dioxide content, toluene index, total mineralization, water type, etc. These technologies have certain water identification capabilities in principle, and these parameters have certain sensitivity to water, so as to better solve the water identification problem. The present invention improves the accuracy of reservoir water content identification, improves the compliance rate of fluid property interpretation of tight sandstone oil and gas reservoirs and carbonate oil and gas reservoirs, and is conducive to promoting the efficient exploration and development of these two types of oil and gas reservoirs, saving a large amount of funds.

[0137] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. If the present invention is modified or replaced by equivalents without departing from the spirit and scope of the present invention, it should be covered by the protection scope of the claims of the present invention.

Claims

1. A water identification method based on multi-parameter joint discrimination, characterized in that: It includes the following steps: 1) Determine the water identification sensitive parameters of gas logging technology, ion chromatography technology, light hydrocarbon technology and non-hydrocarbon technology respectively; 2) Establish the interpretation criteria corresponding to the water identification sensitive parameters of gas logging technology, ion chromatography technology, light hydrocarbon technology and non-hydrocarbon technology respectively; 3) Establish the reliability ranking of water identification for gas logging technology, ion chromatography technology, light hydrocarbon technology and non-hydrocarbon technology; 4) Based on the established reliability ranking of water identification and the interpretation criteria corresponding to each water identification sensitive parameter, determine the water layer.

2. The water identification method based on multi-parameter joint discrimination according to claim 1 is characterized in that: In step 1), the water identification sensitive parameters of gas logging technology include the humidity ratio change rate and the hydrocarbon slope change rate.

3. The water identification method based on multi-parameter joint discrimination according to claim 2 is characterized in that: The humidity ratio change rate and the hydrocarbon slope change rate are calculated by the following formulas respectively: Humidity ratio = air measurement C 2+ / Gas Test C 1+ ; Hydrocarbon slope = gas logging C2 / gas logging C3; Humidity ratio change rate = (humidity ratio - base value) / base value; Hydrocarbon slope change rate = (hydrocarbon slope - base value) / base value, Among them, in the above formula, C 1+ It represents the sum of the contents of C1 to C5. 2+ It represents the sum of the contents of C2 to C5, C1 represents the content of methane, C2 represents the content of ethane, C3 represents the content of propane, C4 represents the content of butane, and C5 represents the content of pentane.

4. The water identification method based on multi-parameter joint discrimination according to claim 1 is characterized in that: In step 1), the water identification sensitive parameters of ion chromatography technology include the absolute value of the total salinity change rate and the water type.

5. The water identification method based on multi-parameter joint discrimination according to claim 4 is characterized in that: The water type is determined by calculation according to the Schilling classification based on the ion chromatography analysis results, and the absolute value of the total salinity change rate is calculated by the following formula: Total salinity = sum of the contents of each ion in ion chromatography analysis; Absolute value of total salinity change rate = 丨(total salinity - base value) / base value丨.

6. The water identification method based on multi-parameter joint discrimination according to claim 1 is characterized in that: In step 1), the water identification sensitive parameters of light hydrocarbon technology include the change amount of methane relative content and the change amount of toluene index.

7. The water identification method based on multi-parameter joint discrimination according to claim 6 is characterized in that: The change amount of methane relative content and the change amount of toluene index are calculated by the following formulas respectively: Methane relative content = methane content / total hydrocarbon content; Change amount of methane relative content = methane relative content - base value; Change amount of toluene index = toluene index - base value.

8. The water identification method of multi-parameter joint discrimination according to claim 1 is characterized in that: In step 1), the water identification sensitive parameters of non-hydrocarbon technology include CO2 content and CO2 content change rate.

9. The water identification method of multi-parameter joint discrimination according to claim 8 is characterized in that: The CO2 content change rate is calculated by the following formula: CO2 content change rate = (CO2 content - base value) / base value.

10. The water identification method of multi-parameter joint discrimination according to claim 3 is characterized in that: In step 2), the interpretation criteria corresponding to the water identification sensitive parameters of the gas logging technology are: If the humidity ratio change rate ≤ -40% and the hydrocarbon slope change rate ≥ 35%, it is determined as an aquifer, otherwise it is determined as a non-aquifer.

11. The water identification method of multi-parameter joint discrimination according to claim 5 is characterized in that: In step 2), the interpretation criteria corresponding to the water identification sensitive parameters of the ion chromatography technology are: If the absolute value of the total salinity change rate > 100% and the calculated water type is consistent with the regional formation water type, it is determined as an aquifer, otherwise it is determined as a non-aquifer.

12. The water identification method of multi-parameter joint discrimination according to claim 7 is characterized in that: In step 2), the interpretation criteria corresponding to the water identification sensitive parameters of the light hydrocarbon technology are: If the change amount of methane relative content > 0 and the change amount of toluene index > 1, it is determined as an aquifer, otherwise it is determined as a non-aquifer.

13. The water identification method of multi-parameter joint discrimination according to claim 9 is characterized in that: In step 2), the interpretation criteria corresponding to the water identification sensitive parameters of the non-hydrocarbon technology are: If the CO2 content change rate ≥ 5 and 5% ≤ CO2 content ≤ 50%, it is determined as an aquifer, otherwise it is determined as a non-aquifer.

14. The water identification method of multi-parameter joint discrimination according to claim 1 is characterized in that: In step 3), the reliability ranking of water identification of the established gas detection technology, ion chromatography technology, light hydrocarbon technology and non-hydrocarbon technology is: ion chromatography technology > gas detection technology > light hydrocarbon technology > non-hydrocarbon technology.

15. The water identification method of multi-parameter joint discrimination according to claim 1 is characterized in that: In step 4), the identification of water layers includes determining aquifers, determining suspected aquifers and determining non-aquifers.

16. The water identification method of multi-parameter joint discrimination according to claim 15 is characterized in that: Aquifer determination includes: If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is non-aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is aquifer, then the comprehensive interpretation conclusion is aquifer; If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is aquifer, then the comprehensive interpretation conclusion is aquifer; If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is non-aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is aquifer, then the comprehensive interpretation conclusion is aquifer; If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is aquifer, then the comprehensive interpretation conclusion is aquifer; If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is non-aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is aquifer, then the comprehensive interpretation conclusion is aquifer; If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is non-aquifer, then the comprehensive interpretation conclusion is aquifer; If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is aquifer, then the comprehensive interpretation conclusion is aquifer; If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is non-aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is aquifer, then the comprehensive interpretation conclusion is aquifer; If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is an aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is an aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is an aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is a non-aquifer, then the comprehensive interpretation conclusion is an aquifer; If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the gas detection technology is an aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the non-hydrocarbon technology is an aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the light hydrocarbon technology is an aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the ion chromatography technology is an aquifer, then the comprehensive interpretation conclusion is an aquifer.

17. The water identification method of multi-parameter joint discrimination according to claim 15 is characterized in that: Suspicious aquifers include: If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is non-aquifer, then the comprehensive interpretation conclusion is a suspected aquifer; If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is non-aquifer, then the comprehensive interpretation conclusion is a suspected aquifer; If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is non-aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is non-aquifer, then the comprehensive interpretation conclusion is a suspected aquifer; If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the gas detection technology is an aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the non-hydrocarbon technology is an aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the light hydrocarbon technology is a non-aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the ion chromatography technology is a non-aquifer, then the comprehensive interpretation conclusion is a suspected aquifer.

18. The water identification method of multi-parameter joint discrimination according to claim 15, characterized in that: The determination of non-aquifers includes: If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the gas detection technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the non-hydrocarbon technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the light hydrocarbon technology is non-aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameter of the ion chromatography technology is non-aquifer, then the comprehensive interpretation conclusion is non-aquifer; If the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the gas detection technology is non-aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the non-hydrocarbon technology is aquifer, the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the light hydrocarbon technology is non-aquifer, and the interpretation conclusion of the interpretation standard corresponding to the water identification sensitive parameters of the ion chromatography technology is non-aquifer, then the comprehensive interpretation conclusion is non-aquifer.

19. A water identification system based on multi-parameter joint discrimination, characterized in that: include: A first module, wherein the first module is configured to respectively determine water identification sensitive parameters of gas detection technology, ion chromatography technology, light hydrocarbon technology and non-hydrocarbon technology; A second module, wherein the second module is configured to respectively establish interpretation standards corresponding to water identification sensitive parameters of gas detection technology, water identification sensitive parameters of ion chromatography technology, water identification sensitive parameters of light hydrocarbon technology, and water identification sensitive parameters of non-hydrocarbon technology; A third module, the third module is configured to establish a water identification reliability ranking of the gas detection technology, the ion chromatography technology, the light hydrocarbon technology and the non-hydrocarbon technology; as well as The fourth module is configured to identify the water layer based on the established water identification reliability ranking and the established interpretation standards corresponding to each water identification sensitive parameter.

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