Measurement and recording fused ultra-low-resistance hydrocarbon reservoir identification method, device and equipment and medium

Abstract

The invention discloses a measurement and recording fused ultra-low resistivity oil and gas reservoir identification method, device, equipment and medium, and relates to the technical field of oil and gas reservoir identification and evaluation, and the method comprises the steps: obtaining the formation testing condition of an ultra-low resistivity oil and gas reservoir, determining and fusing a well logging characteristic value and a well logging characteristic value, calculating and drawing a gas logging total hydrocarbon increase multiple and a sound wave curve, combining the gas logging total hydrocarbon increase multiple with the acoustic curve, determining the range of the gas logging total hydrocarbon increase multiple, intersecting the gas logging total hydrocarbon increase multiple with the acoustic curve based on the range of the gas logging total hydrocarbon increase multiple, and calculating the enveloping area after intersection; determining the area form of the envelope area, and determining the fluid property of the reservoir comprising the ultra-low resistivity hydrocarbon reservoir according to the area form; and hydrocarbon reservoir type identification is carried out on the ultra-low resistivity hydrocarbon reservoir based on the envelope area and the fluid property. According to the invention, the problem that the existing partial formation resistivity curve is inaccurate in oil and gas reservoir identification can be solved, the identification of the ultra-low-resistance oil and gas reservoir is realized, and the identification accuracy and efficiency of the ultra-low-resistance oil and gas reservoir are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas layer identification and evaluation, and in particular to a measurement and recording fusion ultra-low resistivity oil and gas layer identification method, device, equipment and medium. Background Art

[0002] With the continuous deepening of exploration and development, normal oil and gas layers, low-resistivity oil and gas layers, and high-resistivity water layers coexist in clastic reservoirs. The logging response characteristics of oil and gas layers and water layers are slightly different, and it is difficult to distinguish between oil and gas layers and water layers. The existence of these problems has brought certain difficulties to the accurate identification and evaluation of oil and gas layers by conventional interpretation, which in turn restricts the fine exploration and efficient development of oil fields. In the existing technology, the identification of oil and gas layers mainly relies on the Archie formula, and the conventional logging curve is used to quantitatively calculate the oil saturation. However, due to the high bound water content in some reservoirs and the invasion of mud during drilling, the resistivity of some oil and gas layers shows low resistance or even ultra-low resistance. The use of conventional nine logging curves to identify low-resistivity oil and gas layers has obvious limitations, so there is a problem of inaccurate identification of oil and gas layers by some formation resistivity curves.

[0003] From the above, it can be seen that how to solve the problem of inaccurate identification of oil and gas layers by some current formation resistivity curves, realize the identification of ultra-low resistivity oil and gas layers, and improve the accuracy and efficiency of ultra-low resistivity oil and gas layer identification are problems to be solved in this field. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a method, device, equipment and medium for identifying ultra-low resistivity oil and gas layers by integrating measurement and recording, which can solve the problem of inaccurate identification of oil and gas layers by partial formation resistivity curves, realize the identification of ultra-low resistivity oil and gas layers, and improve the accuracy and efficiency of ultra-low resistivity oil and gas layer identification. The specific scheme is as follows:

[0005] In the first aspect, the present application discloses a method for identifying ultra-low resistivity oil and gas layers by integrating measurement and recording, comprising:

[0006] Obtaining the oil test conditions of the ultra-low resistivity oil and gas layer, and determining the well logging characteristic values ​​and the mud logging characteristic values ​​according to the oil test conditions;

[0007] The logging characteristic value and the logging characteristic value are integrated to calculate and draw the gas logging total hydrocarbon increase multiple and the acoustic wave curve, the gas logging total hydrocarbon increase multiple and the acoustic wave curve are combined, and the gas logging total hydrocarbon increase multiple range is determined according to the oil test situation, and the gas logging total hydrocarbon increase multiple and the acoustic wave curve are intersected based on the gas logging total hydrocarbon increase multiple range to calculate the envelope area after the intersection;

[0008] Determining the area shape of the envelope area, and determining the fluid properties of the reservoir including the ultra-low resistivity oil and gas layer according to the area shape;

[0009] The type of the ultra-low resistivity oil and gas layer is identified based on the envelope area and the fluid properties to obtain an ultra-low resistivity oil and gas layer type identification result.

[0010] Optionally, the logging characteristic value includes a gas logging base value, and the logging characteristic value includes an acoustic wave curve range.

[0011] Optionally, the fusing of the well logging characteristic value and the mud logging characteristic value to calculate and draw the gas logging total hydrocarbon increase multiple and the acoustic wave curve includes:

[0012] The gas measurement base value and the acoustic wave curve range are integrated, and the gas measurement total hydrocarbon increase multiple is calculated using the gas measurement base value;

[0013] A sound wave curve is drawn based on the sound wave curve range.

[0014] Optionally, the step of combining the total hydrocarbon increase factor of the gas test with the acoustic wave curve and determining the range of the total hydrocarbon increase factor of the gas test according to the oil test conditions includes:

[0015] The sonic curve is selected as the clastic rock range, and the gas logging total hydrocarbon increase multiple and the sonic curve are placed in the same track, and the gas logging base value of the oil and gas-free section and the gas logging total hydrocarbon increase multiple range are determined according to the oil test situation.

[0016] Optionally, the step of intersecting the gas-tested total hydrocarbon increase multiple and the acoustic wave curve based on the gas-tested total hydrocarbon increase multiple range to calculate the envelope area after the intersection includes:

[0017] Based on the gas logging total hydrocarbon increase multiple range, the gas logging total hydrocarbon increase multiple and the acoustic wave curve are intersected, and spacing grid line matching is performed to calculate the envelope area after the intersection and spacing grid line matching.

[0018] Optionally, the area shape includes a box-shaped area shape, a half-box-shaped area shape, an equilateral triangle area shape, an inverted triangle area shape, a bell-shaped area shape, a finger-shaped area shape and a peak-shaped area shape.

[0019] Optionally, the identifying the type of the ultra-low resistivity oil and gas layer based on the envelope area and the fluid property to obtain an ultra-low resistivity oil and gas layer type identification result includes:

[0020] Obtaining each preset envelope area range, and generating an oil and gas layer type identification standard according to each envelope area range and in combination with the envelope area and fluid properties;

[0021] The oil and gas layer type identification standard is used to identify the oil and gas layer type of the ultra-low resistivity oil and gas layer to obtain the ultra-low resistivity oil and gas layer type identification result.

[0022] In the second aspect, the present application discloses a device for identifying ultra-low-resistance oil and gas layers by integrating measurement and recording, comprising:

[0023] A characteristic value determination module is used to obtain the oil test conditions of the ultra-low resistivity oil and gas layer, and determine the well logging characteristic value and the mud logging characteristic value according to the oil test conditions;

[0024] A curve combination and intersection module is used to merge the logging characteristic value and the logging characteristic value so as to calculate and draw the gas logging total hydrocarbon increase multiple and the acoustic wave curve, combine the gas logging total hydrocarbon increase multiple and the acoustic wave curve, determine the gas logging total hydrocarbon increase multiple range according to the oil test situation, and intersect the gas logging total hydrocarbon increase multiple and the acoustic wave curve based on the gas logging total hydrocarbon increase multiple range to calculate the envelope area after the intersection;

[0025] A fluid property determination module, used to determine the area shape of the envelope area, and determine the fluid property of the reservoir including the ultra-low resistivity oil and gas layer according to the area shape;

[0026] The identification module is used to identify the type of the ultra-low resistivity oil and gas layer based on the envelope area and the fluid properties to obtain an ultra-low resistivity oil and gas layer type identification result.

[0027] In a third aspect, the present application discloses an electronic device, comprising:

[0028] Memory, used to store computer programs;

[0029] The processor is used to execute the computer program to implement the above-mentioned measurement and recording fusion method for identifying ultra-low resistivity oil and gas layers.

[0030] In a fourth aspect, the present application discloses a computer storage medium for storing a computer program; wherein, when the computer program is executed by a processor, the steps of the aforementioned disclosed method for identifying ultra-low resistivity oil and gas layers by integrating measurement and recording are implemented.

[0031] It can be seen that the present application provides a method for identifying ultra-low resistivity oil and gas layers by integrating measurement and logging, including obtaining oil testing conditions of the ultra-low resistivity oil and gas layers, determining logging characteristic values ​​and logging characteristic values ​​according to the oil testing conditions; integrating the logging characteristic values ​​and the logging characteristic values ​​to calculate and draw the gas logging total hydrocarbon increase factor and the acoustic wave curve, combining the gas logging total hydrocarbon increase factor and the acoustic wave curve, determining the gas logging total hydrocarbon increase factor range according to the oil testing conditions, and intersecting the gas logging total hydrocarbon increase factor and the acoustic wave curve based on the gas logging total hydrocarbon increase factor range to calculate the envelope area after the intersection; determining the area shape of the envelope area, and determining the fluid properties of the reservoir including the ultra-low resistivity oil and gas layers according to the area shape; identifying the oil and gas layer type of the ultra-low resistivity oil and gas layers based on the envelope area and the fluid properties to obtain an ultra-low resistivity oil and gas layer type identification result. The present application determines the logging characteristic value and the mud logging characteristic value according to the oil testing situation of the ultra-low resistivity oil and gas layer, and integrates them to calculate and draw the gas logging total hydrocarbon increase multiple and the acoustic wave curve. By applying the logging characteristic value and the mud logging characteristic value to the ultra-low resistivity oil and gas layer, it can make up for the deficiency of resistivity curves in identifying the oil and gas layer, and provide a simple, fast and practical method for identifying the ultra-low resistivity oil and gas layer in clastic rock, and eliminate the error caused by using a single method, so that the result is more reliable. Compared with the previous methods, it has better operability, innovation and applicability, and is conducive to promotion. The gas logging total hydrocarbon increase multiple and the acoustic wave curve are combined, and the gas logging total hydrocarbon increase multiple range is determined according to the oil testing situation. Based on the gas logging The total hydrocarbon amplification multiple range is combined with the gas logging total hydrocarbon amplification multiple and the acoustic wave curve, the envelope area after the intersection is calculated, the fluid properties are determined, and the ultra-low resistivity oil and gas layer is identified in combination with the envelope area and the fluid properties, and the ultra-low resistivity oil and gas layer type identification result is obtained. It can not only realize accurate identification of oil and gas layers under low resistivity conditions, but also use the ultra-low resistivity oil and gas layer type identification result to improve the accuracy of the evaluation of reservoir physical properties and oil and gas content. The technical solution of the present application can not only be applied to blocks with developed oil and gas layers, new exploration areas, and new formations, but also can be promoted and applied in the review of old wells, so the accuracy and efficiency of ultra-low resistivity oil and gas layer identification can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0033] Figure 1 This is a flow chart of a method for identifying ultra-low resistivity oil and gas layers by integrating measurement and recording disclosed in this application;

[0034] Figure 2 This is a comprehensive interpretation diagram of the TKXXXX well with a resistivity of about 0.6Ω·m in the oil and gas display section disclosed in this application;

[0035] Figure 3 This is the comprehensive interpretation map of the TKXXXX well, in which the resistivity of the oil and gas display section disclosed in this application is only about 0.5Ω·m;

[0036] Figure 4 This is a schematic diagram of the structure of a device for identifying ultra-low-resistance oil and gas layers that integrates measurement and recording disclosed in this application;

[0037] Figure 5 A structural diagram of an electronic device provided for this application. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] With the continuous deepening of exploration and development, normal oil and gas layers, low-resistance oil and gas layers, and high-resistance water layers coexist in clastic reservoirs. The logging response characteristics of oil and gas layers and water layers are slightly different, and it is difficult to distinguish between oil and gas layers and water layers. The existence of these problems has brought certain difficulties to the accurate identification and evaluation of oil and gas layers by conventional interpretation, which in turn restricts the fine exploration and efficient development of oil fields. In the prior art, the identification of oil and gas layers mainly relies on the Archie formula, and the conventional logging curve is used to quantitatively calculate the oil saturation. However, due to the high bound water content of some reservoirs and the invasion of mud during drilling, the resistivity of some oil and gas layers presents low resistance or even ultra-low resistance characteristics. The use of conventional nine logging curves to identify low-resistance oil and gas layers has obvious limitations, so there is a problem of inaccurate identification of oil and gas layers by some formation resistivity curves. As can be seen from the above, how to solve the problem of inaccurate identification of oil and gas layers by some formation resistivity curves, realize the identification of ultra-low resistance oil and gas layers, and improve the accuracy and efficiency of ultra-low resistance oil and gas layer identification are problems to be solved in this field.

[0040] See also Figure 1 As shown, the embodiment of the present invention discloses a method for identifying ultra-low resistivity oil and gas layers by integrating measurement and recording, which may specifically include:

[0041] Step S11: Obtaining the oil testing condition of the ultra-low resistivity oil and gas layer, and determining the well logging characteristic value and the mud logging characteristic value according to the oil testing condition.

[0042] In this embodiment, the oil test conditions of the ultra-low resistivity oil and gas layer are obtained, and the well logging characteristic values ​​and the mud logging characteristic values ​​are determined according to the oil test conditions, wherein the mud logging characteristic values ​​include the gas logging base value, and the well logging characteristic values ​​include the acoustic wave curve range.

[0043] Step S12: Fusion of the logging characteristic value and the mud logging characteristic value to calculate and draw the gas logging total hydrocarbon increase factor and the acoustic wave curve, combining the gas logging total hydrocarbon increase factor and the acoustic wave curve, determining the gas logging total hydrocarbon increase factor range according to the oil test conditions, and intersecting the gas logging total hydrocarbon increase factor and the acoustic wave curve based on the gas logging total hydrocarbon increase factor range to calculate the envelope area after the intersection.

[0044] In this embodiment, the gas logging base value and the acoustic wave curve range are integrated, the gas logging base value is used to calculate the gas logging total hydrocarbon increase multiple, the acoustic wave curve is drawn based on the acoustic wave curve range, the acoustic wave curve is selected as the clastic rock range, and the gas logging total hydrocarbon increase multiple and the acoustic wave curve are placed in the same track, the gas logging base value and the gas logging total hydrocarbon increase multiple range of the oil and gas free section are determined according to the oil test situation, the gas logging total hydrocarbon increase multiple and the acoustic wave curve are intersected based on the gas logging total hydrocarbon increase multiple range, and spacing grid matching is performed, and the envelope area after the intersection and spacing grid matching is calculated.

[0045] Among them, the logging information corresponding to the logging characteristic value is an important data reflecting the oil content of the reservoir. The oil and gas layer is often shown in the logging as good rock logging display, complete gas logging components, high total hydrocarbon value, and full curve shape. This application integrates the logging characteristic value and the logging characteristic value to make up for the shortcomings of resistivity and other curves in identifying oil and gas layers.

[0046] Taking the 143 reservoirs of 80 wells in the work area as an example, through the analysis of the test results of the 143 reservoirs and the corresponding logging-gas logging data, it is found that the gas logging components of the oil and gas layers are complete, the total hydrocarbon value is high, and the gas logging curve shape is full; the gas logging components of the water layer are incomplete, generally only up to , the total hydrocarbon value is low, which is a matrix characteristic (generally less than 1%), and its curve and gas logging curve are nearly straight or low-amplitude slow waves. In order to reduce the influence of factors such as drilling fluid density and drilling pressure, this application uses the gas logging total hydrocarbon increase multiple to replace the gas logging total hydrocarbon value as a discriminant factor. The calculation formula for the gas logging total hydrocarbon increase multiple is:

[0047] ;

[0048] Where C is the total hydrocarbon value, It is the full hydrocarbon value.

[0049] The acoustic wave curve can better reflect the physical properties of sandstone and mudstone reservoirs. When the acoustic wave curve is selected as the clastic rock range, the reservoir properties can be determined according to the Wyllie average formula:

[0050] ;

[0051] in, is the logging acoustic time difference, The acoustic time difference of the rock skeleton, is the fluid acoustic time difference, s / ft or s / m, is the compaction coefficient, which is 1 for normal compacted layers and is dimensionless. is the porosity, %.

[0052] Then, the gas logging total hydrocarbon amplification factor and the acoustic wave curve are placed on the same track. Based on the determined gas logging total hydrocarbon amplification factor range, the gas logging total hydrocarbon amplification factor and the acoustic wave curve are intersected, and the spacing grid matching is performed to calculate the envelope area after the intersection and spacing grid matching. The envelope area is calculated by calibrating the size of the envelope area using the grid composed of depth lines and scale lines. If the grid occupies more than 50%, the envelope area is increased by 1. If it is less than 50%, it is not increased.

[0053] Taking a certain work area in Northwest China as an example, based on the range of total hydrocarbon increase multiples of gas logging and the intersection of total hydrocarbon increase multiples of gas logging and acoustic wave curves, a comprehensive bar graph is obtained. The curve of the comprehensive bar graph is divided into 5 equally spaced areas by 6 scale lines (right boundary, 4 scale lines, and left boundary). In order to ensure the ease of use of the method and consider the rationality of the curve distribution, the total hydrocarbon increase multiple curve of gas logging is matched with the 6 scale lines from 0 to 10, that is, the rightmost boundary corresponds to the total hydrocarbon increase multiple of 0, with an equal interval of 2 as a step, and the leftmost boundary corresponds to a value of 10; the acoustic wave curve is divided into 5 equally spaced areas from 140 to 400. s / ft, matching the 6 scale lines, that is, the rightmost boundary corresponds to a sound wave value of 140 s / f, the leftmost boundary corresponds to a sound wave value of 40 s / ft; the two curves will intersect in the oil and gas layer to form envelope surfaces of various shapes, and the size of the envelope surface is determined by the grid.

[0054] Step S13: determining the area shape of the envelope area, and determining the fluid properties of the reservoir including the ultra-low resistivity oil and gas layer according to the area shape.

[0055] Among them, the area shapes include box-shaped area shapes, half-box-shaped area shapes, equilateral triangle area shapes, inverted triangle area shapes, bell-shaped area shapes, finger-shaped area shapes and peak-shaped area shapes.

[0056] Specifically, if the area shape is a "box" shape (i.e., a box-shaped area shape), it indicates that the reservoir has weak vertical heterogeneity, uniform physical properties, good overall oil and gas content, and does not contain water; if the area shape is a "half-box" shape (i.e., a half-box-shaped area shape), it indicates that the reservoir has weak vertical heterogeneity, good physical properties, uneven oil content, oil and gas content on the upper side and water content on the lower side; if the area shape is an "equilateral triangle" shape (i.e., an equilateral triangle area shape), it indicates that the reservoir has weak vertical heterogeneity, and the physical properties and oil content gradually increase vertically; if the area shape is an "inverted triangle" shape (i.e., an inverted triangle area shape), it indicates that the reservoir has weak vertical heterogeneity, and the physical properties and oil content gradually increase vertically. The physical properties gradually decrease vertically, with oil and gas in the upper part and water in the lower part; if the area shape is "bell" shaped (i.e. bell-shaped area shape), it indicates that the reservoir has strong vertical heterogeneity, the physical properties and oil content in the middle part are relatively uniform, and the physical properties and oil content in the upper and lower parts are poor; if the area shape is "finger" shaped (i.e. finger-shaped area shape), it indicates that the reservoir has strong vertical heterogeneity, with good and poor physical properties and oil content alternating, the oil abundance in the layer with good physical properties is high, and the oil abundance in the layer with poor physical properties is low; if the area shape is "peak" shaped (i.e. peak-shaped area shape), it indicates that the reservoir has strong vertical heterogeneity, which is generally most obvious in tight formations with fractures as the main storage space.

[0057] Step S14: Based on the envelope area and the fluid properties, the oil and gas layer type of the ultra-low resistivity oil and gas layer is identified to obtain an ultra-low resistivity oil and gas layer type identification result.

[0058] In this embodiment, each preset envelope area range is obtained, and an oil and gas layer type identification standard is generated according to each envelope area range and in combination with the envelope area and fluid properties; the oil and gas layer type identification standard is used to identify the oil and gas layer type of the ultra-low resistivity oil and gas layer to obtain an ultra-low resistivity oil and gas layer type identification result.

[0059] For example, if the envelope area is ≥8, the shape is full, box-shaped and finger-shaped, indicating that the overall gas logging amplitude is greater than 7 times, the porosity is greater than 20, the oil abundance is high, the physical properties are good, and the interpretation conclusion is oil and gas layer (that is, the ultra-low resistivity oil and gas layer type identification result is oil and gas layer); if 4≤envelope area<8, the shape is not full, the shape is half box, inverted triangle, bell-shaped, finger-shaped, indicating that part of the gas logging amplitude is greater than 7 times, the porosity is 15-20, the oil abundance is good, the physical properties are good, but not full, and the comprehensive interpretation is that oil and water are in the same layer (that is, the ultra-low resistivity oil and gas layer type identification result is oil and water in the same layer); if 2≤envelope area<4, the shape If it is a sharp peak, it means that some gas logging amplitudes are greater than 7 times and the porosity is less than 10, with a certain oil abundance but poor reservoir properties, and the interpretation conclusion is a poor oil layer (that is, the ultra-low resistivity oil and gas layer type identification result is a poor oil layer); if 2≤envelope area<4, the shape is an inverted triangle or an equilateral triangle, indicating that the oil abundance is poor and the physical properties are general, and the interpretation conclusion is an oil-bearing water layer (that is, the ultra-low resistivity oil and gas layer type identification result is an oil-bearing water layer); if 0<envelope area<2, the shape is a sharp peak, indicating that the oil abundance and physical properties are poor, and the interpretation conclusion is a dry layer (that is, the ultra-low resistivity oil and gas layer type identification result is a dry layer); the water layer has no envelope surface. When generating the interpretation conclusion, the morphology is given priority, and then the size of the envelope surface. When the two do not match, the morphology is the main factor. In summary, the interpretation conclusion table is finally generated, as shown in Table 1:

[0060] Table 1

[0061]

[0062] The accuracy of the present invention is verified by taking the specific oil test results of TKXXXX well. Figure 2 This is the comprehensive interpretation map of the TKXXXX well, where the resistivity of the oil and gas display section is about 0.6Ω·m. Figure 2 The reservoir of the TKXXXX well shown in is the sandstone formation of the Triassic A IV segment, and the resistivity of the oil and gas display segment is only about 0.6Ω·m. The boundary value is set by combining the regional gas measurement and acoustic wave time difference characteristics, and the technical solution of this application is used to quickly identify the ultra-low resistivity oil and gas layer in combination with the size and shape of the envelope surface, wherein, Figure 2 The first and third tracks are original logging curves, the second track is the interaction between the total hydrocarbon amplification factor of gas logging and the acoustic wave curve, the fourth track is the interpretation conclusion obtained by applying the present invention (i.e., the result of identifying the type of ultra-low resistivity oil and gas layers), and the fifth track is the oil testing conclusion.

[0063] Depend on Figure 2It can be seen that: (1) 4412.50-4416.00m, the total hydrocarbon increase factor and the acoustic time difference envelope are box-shaped, with a size of 8, and the interpretation conclusion is an oil and gas layer; (2) 4416.60-4417.60, the total hydrocarbon increase factor and the acoustic time difference envelope are peak-shaped, with a size of 2, and the interpretation conclusion is a poor oil layer; (3) 4418.50-4424.50, the total hydrocarbon increase factor and the acoustic time difference envelope are box-shaped, with a size of 12, and the interpretation conclusion is an oil and gas layer. The test 4412.5-4424.5m is an oil layer, verifying that the conclusion is correct.

[0064] Figure 3 This is the comprehensive interpretation map of the TKXXXX well, where the resistivity of the oil and gas display section is only about 0.5Ω·m. Figure 3 The reservoir of the TKXXXX well shown in the figure is the sandstone formation of the AⅣ section of the Triassic System. The resistivity of the oil and gas display section is only about 0.5Ω·m. The boundary value is set by combining the regional gas measurement and acoustic wave time difference characteristics. The technical solution of the present application is used to quickly identify the ultra-low resistivity oil and gas layer in combination with the size and shape of the envelope surface.

[0065] Depend on Figure 3 It can be seen that: (1) 4524.50-4532.50, the total hydrocarbon increase factor and the acoustic time difference envelope are finger-shaped, with a size of 13, and the interpretation conclusion is that oil and water are in the same layer; (2) 4538.00-4544.00, the total hydrocarbon increase factor and the acoustic time difference envelope are box-shaped, with a size of 11, and the ultra-low resistivity oil and gas layer type identification result is an oil and gas layer; (3) 4547.00-4550.00, the total hydrocarbon increase factor and the acoustic time difference envelope are box-shaped, with a size of 6, and the interpretation conclusion is an oil and gas layer; (4) 4550.00-4553.00, the total hydrocarbon increase factor and the acoustic time difference envelope are inverted triangle-shaped, with a size of 4, and the interpretation conclusion is that oil and water are in the same layer. The test 4539.5-4544.0 is an oil layer, verifying that the conclusion is correct.

[0066] The innovations of this application are as follows: (1) The well logging characteristic values ​​and mud logging characteristic values ​​are integrated and applied to the ultra-low resistivity oil and gas layers. The technical ideas are clear and the application is simple. It makes up for the shortcomings of resistivity curves in identifying oil and gas layers, and provides a simple, fast and practical method for identifying ultra-low resistivity oil and gas layers in clastic rocks; (2) This application is applicable to ultra-low resistivity oil and gas layers, eliminating the errors caused by the use of a single method, and the results are more reliable. Compared with previous methods, it has better operability, innovation and applicability, which is conducive to promotion. This method has been successfully applied to more than 500 wells in the Tahe block of the Northwest Oilfield; (3) This application can not only be applied to blocks with developed oil and gas layers, new exploration areas, and new formations, but also can be promoted and applied in the review of old wells; (4) From the above-mentioned embodiment of wells with different resistivity in the display section, it can be seen that the accuracy of identifying ultra-low resistivity oil and gas layers by applying the technical solution of this application is 92.5%, which is higher than the 85% stipulated by the industry standard.

[0067] In this embodiment, the oil test conditions of the ultra-low resistivity oil and gas layer are obtained, and the well logging characteristic values ​​and the mud logging characteristic values ​​are determined according to the oil test conditions; the well logging characteristic values ​​and the mud logging characteristic values ​​are integrated to calculate and draw the gas logging total hydrocarbon increase multiple and the acoustic wave curve, the gas logging total hydrocarbon increase multiple and the acoustic wave curve are combined, and the gas logging total hydrocarbon increase multiple range is determined according to the oil test conditions; based on the gas logging total hydrocarbon increase multiple range, the gas logging total hydrocarbon increase multiple and the acoustic wave curve are intersected to calculate the envelope area after the intersection; the area shape of the envelope area is determined, and the fluid properties of the reservoir including the ultra-low resistivity oil and gas layer are determined according to the area shape; the oil and gas layer type of the ultra-low resistivity oil and gas layer is identified based on the envelope area and the fluid properties to obtain the ultra-low resistivity oil and gas layer type identification result. The present application determines the logging characteristic value and the mud logging characteristic value according to the oil testing situation of the ultra-low resistivity oil and gas layer, and integrates them to calculate and draw the gas logging total hydrocarbon increase multiple and the acoustic wave curve. By applying the logging characteristic value and the mud logging characteristic value to the ultra-low resistivity oil and gas layer, it can make up for the deficiency of resistivity curves in identifying the oil and gas layer, and provide a simple, fast and practical method for identifying the ultra-low resistivity oil and gas layer in clastic rock, and eliminate the error caused by using a single method, so that the result is more reliable. Compared with the previous methods, it has better operability, innovation and applicability, and is conducive to promotion. The gas logging total hydrocarbon increase multiple and the acoustic wave curve are combined, and the gas logging total hydrocarbon increase multiple range is determined according to the oil testing situation. Based on the gas logging The total hydrocarbon amplification multiple range is combined with the gas logging total hydrocarbon amplification multiple and the acoustic wave curve, the envelope area after the intersection is calculated, the fluid properties are determined, and the ultra-low resistivity oil and gas layer is identified in combination with the envelope area and the fluid properties, and the ultra-low resistivity oil and gas layer type identification result is obtained. It can not only realize accurate identification of oil and gas layers under low resistivity conditions, but also use the ultra-low resistivity oil and gas layer type identification result to improve the accuracy of the evaluation of reservoir physical properties and oil and gas content. The technical solution of the present application can not only be applied to blocks with developed oil and gas layers, new exploration areas, and new formations, but also can be promoted and applied in the review of old wells, so the accuracy and efficiency of ultra-low resistivity oil and gas layer identification can be improved.

[0068] See also Figure 4 As shown, the embodiment of the present invention discloses a device for identifying an ultra-low-resistance oil and gas layer by integrating measurement and recording, which may specifically include:

[0069] The characteristic value determination module 11 is used to obtain the oil test condition of the ultra-low resistivity oil and gas layer, and determine the well logging characteristic value and the mud logging characteristic value according to the oil test condition;

[0070] The curve combination and intersection module 12 is used to merge the logging characteristic value and the logging characteristic value so as to calculate and draw the gas logging total hydrocarbon increase multiple and the acoustic wave curve, combine the gas logging total hydrocarbon increase multiple and the acoustic wave curve, determine the gas logging total hydrocarbon increase multiple range according to the oil test situation, and intersect the gas logging total hydrocarbon increase multiple and the acoustic wave curve based on the gas logging total hydrocarbon increase multiple range to calculate the envelope area after the intersection;

[0071] A fluid property determination module 13, used to determine the area shape of the envelope area, and determine the fluid property of the reservoir including the ultra-low resistivity oil and gas layer according to the area shape;

[0072] The identification module 14 is used to identify the type of the ultra-low resistivity oil and gas layer based on the envelope area and the fluid property to obtain an ultra-low resistivity oil and gas layer type identification result.

[0073] In this embodiment, the oil test conditions of the ultra-low resistivity oil and gas layer are obtained, and the well logging characteristic values ​​and the mud logging characteristic values ​​are determined according to the oil test conditions; the well logging characteristic values ​​and the mud logging characteristic values ​​are integrated to calculate and draw the gas logging total hydrocarbon increase multiple and the acoustic wave curve, the gas logging total hydrocarbon increase multiple and the acoustic wave curve are combined, and the gas logging total hydrocarbon increase multiple range is determined according to the oil test conditions; based on the gas logging total hydrocarbon increase multiple range, the gas logging total hydrocarbon increase multiple and the acoustic wave curve are intersected to calculate the envelope area after the intersection; the area shape of the envelope area is determined, and the fluid properties of the reservoir including the ultra-low resistivity oil and gas layer are determined according to the area shape; the oil and gas layer type of the ultra-low resistivity oil and gas layer is identified based on the envelope area and the fluid properties to obtain the ultra-low resistivity oil and gas layer type identification result. The present application determines the logging characteristic value and the mud logging characteristic value according to the oil testing situation of the ultra-low resistivity oil and gas layer, and integrates them to calculate and draw the gas logging total hydrocarbon increase multiple and the acoustic wave curve. By applying the logging characteristic value and the mud logging characteristic value to the ultra-low resistivity oil and gas layer, it can make up for the deficiency of resistivity curves in identifying the oil and gas layer, and provide a simple, fast and practical method for identifying the ultra-low resistivity oil and gas layer in clastic rock, and eliminate the error caused by using a single method, so that the result is more reliable. Compared with the previous methods, it has better operability, innovation and applicability, and is conducive to promotion. The gas logging total hydrocarbon increase multiple and the acoustic wave curve are combined, and the gas logging total hydrocarbon increase multiple range is determined according to the oil testing situation. Based on the gas logging The total hydrocarbon amplification multiple range is combined with the gas logging total hydrocarbon amplification multiple and the acoustic wave curve, the envelope area after the intersection is calculated, the fluid properties are determined, and the ultra-low resistivity oil and gas layer is identified in combination with the envelope area and the fluid properties, and the ultra-low resistivity oil and gas layer type identification result is obtained. It can not only realize accurate identification of oil and gas layers under low resistivity conditions, but also use the ultra-low resistivity oil and gas layer type identification result to improve the accuracy of the evaluation of reservoir physical properties and oil and gas content. The technical solution of the present application can not only be applied to blocks with developed oil and gas layers, new exploration areas, and new formations, but also can be promoted and applied in the review of old wells, so the accuracy and efficiency of ultra-low resistivity oil and gas layer identification can be improved.

[0074] In some specific embodiments, the logging characteristic value includes a gas logging base value, and the logging characteristic value includes an acoustic wave curve range.

[0075] In some specific embodiments, the curve combination intersection module 12 may specifically include:

[0076] A fusion module, used for fusing the gas measurement base value and the acoustic wave curve range, and calculating the gas measurement total hydrocarbon increase multiple by using the gas measurement base value;

[0077] The sound wave curve drawing module is used to draw a sound wave curve based on the sound wave curve range.

[0078] In some specific embodiments, the curve combination intersection module 12 may specifically include:

[0079] The amplification multiple range determination module is used to select the acoustic wave curve as the clastic rock range, and place the gas logging total hydrocarbon amplification multiple and the acoustic wave curve in the same channel, and determine the gas logging base value of the oil and gas-free section and the gas logging total hydrocarbon amplification multiple range according to the oil test situation.

[0080] In some specific embodiments, the curve combination intersection module 12 may specifically include:

[0081] The area calculation module is used to intersect the gas logging total hydrocarbon increase multiple and the acoustic wave curve based on the gas logging total hydrocarbon increase multiple range, perform spacing grid line matching, and calculate the envelope area after intersection and spacing grid line matching.

[0082] In some specific embodiments, the area shape includes a box-shaped area shape, a half-box-shaped area shape, an equilateral triangle area shape, an inverted triangle area shape, a bell-shaped area shape, a finger-shaped area shape, and a peak-shaped area shape.

[0083] In some specific embodiments, the identification module 14 may specifically include:

[0084] An identification standard generation module is used to obtain each preset envelope area range, and generate an oil and gas layer type identification standard according to each envelope area range and in combination with the envelope area and fluid properties;

[0085] The identification result determination module is used to identify the oil and gas layer type of the ultra-low resistivity oil and gas layer using the oil and gas layer type identification standard to obtain the ultra-low resistivity oil and gas layer type identification result.

[0086] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. The electronic device 20 may specifically include: at least one processor 21, at least one memory 22, a power supply 23, a communication interface 24, an input / output interface 25, and a communication bus 26. The memory 22 is used to store a computer program, which is loaded and executed by the processor 21 to implement the relevant steps in the ultra-low resistivity oil and gas layer identification method of the measurement and recording fusion performed by the electronic device disclosed in any of the aforementioned embodiments.

[0087] In this embodiment, the power supply 23 is used to provide working voltage for each hardware device on the electronic device 20; the communication interface 24 can create a data transmission channel between the electronic device 20 and the external device, and the communication protocol it follows is any communication protocol that can be applied to the technical solution of the present application, and is not specifically limited here; the input and output interface 25 is used to obtain external input data or output data to the outside world, and its specific interface type can be selected according to specific application needs and is not specifically limited here.

[0088] In addition, the memory 22, as a carrier for storing resources, can be a read-only memory, a random access memory, a disk or an optical disk, etc. The resources stored thereon include an operating system 221, a computer program 222 and data 223, etc. The storage method can be temporary storage or permanent storage.

[0089] Among them, the operating system 221 is used to manage and control the hardware devices and computer programs 222 on the electronic device 20 to realize the operation and processing of the data 223 in the memory 22 by the processor 21, which can be Windows, Unix, Linux, etc. In addition to including a computer program that can be used to complete the ultra-low-resistance oil and gas layer identification method of the measurement and recording fusion performed by the electronic device 20 disclosed in any of the aforementioned embodiments, the computer program 222 can further include a computer program that can be used to complete other specific tasks. In addition to including data transmitted from an external device received by the ultra-low-resistance oil and gas layer identification device of the measurement and recording fusion, the data 223 can also include data collected by its own input and output interface 25, etc.

[0090] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0091] Furthermore, an embodiment of the present application also discloses a computer-readable storage medium, in which a computer program is stored. When the computer program is loaded and executed by a processor, the steps of the method for identifying ultra-low-resistance oil and gas layers by integrating measurement and recording disclosed in any of the aforementioned embodiments are implemented.

[0092] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0093] The above is a detailed introduction to the ultra-low resistivity oil and gas layer identification method, device, equipment and storage medium with integrated measurement and recording provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for identifying ultra-low resistivity oil and gas layers by integrating measurement and recording, characterized in that: include: Obtaining the oil test conditions of the ultra-low resistivity oil and gas layer, and determining the well logging characteristic values ​​and the mud logging characteristic values ​​according to the oil test conditions; The logging characteristic value and the logging characteristic value are integrated to calculate and draw the gas logging total hydrocarbon increase multiple and the acoustic wave curve, the gas logging total hydrocarbon increase multiple and the acoustic wave curve are combined, and the gas logging total hydrocarbon increase multiple range is determined according to the oil test situation, and the gas logging total hydrocarbon increase multiple and the acoustic wave curve are intersected based on the gas logging total hydrocarbon increase multiple range to calculate the envelope area after the intersection; Determining the area shape of the envelope area, and determining the fluid properties of the reservoir including the ultra-low resistivity oil and gas layer according to the area shape; The type of the ultra-low resistivity oil and gas layer is identified based on the envelope area and the fluid properties to obtain an ultra-low resistivity oil and gas layer type identification result.

2. The method for identifying ultra-low resistivity oil and gas layers by integrating measurement and recording according to claim 1 is characterized in that: The logging characteristic value includes a gas logging base value, and the logging characteristic value includes an acoustic wave curve range.

3. The method for identifying ultra-low resistivity oil and gas layers by integrating measurement and recording according to claim 2 is characterized in that: The fusing of the well logging characteristic value and the mud logging characteristic value to calculate and draw the gas logging total hydrocarbon increase multiple and the acoustic wave curve includes: The gas measurement base value and the acoustic wave curve range are integrated, and the gas measurement total hydrocarbon increase multiple is calculated using the gas measurement base value; A sound wave curve is drawn based on the sound wave curve range.

4. The method for identifying ultra-low resistivity oil and gas layers by integrating measurement and recording according to claim 1 is characterized in that: The step of combining the total hydrocarbon increase factor of the gas test with the acoustic wave curve and determining the range of the total hydrocarbon increase factor of the gas test according to the oil test conditions includes: The sonic curve is selected as the clastic rock range, and the gas logging total hydrocarbon increase multiple and the sonic curve are placed in the same track, and the gas logging base value of the oil and gas-free section and the gas logging total hydrocarbon increase multiple range are determined according to the oil test situation.

5. The method for identifying ultra-low resistivity oil and gas layers by integrating measurement and recording according to claim 1 is characterized in that: The method of intersecting the gas-tested total hydrocarbon increase multiple and the acoustic wave curve based on the gas-tested total hydrocarbon increase multiple range to calculate the envelope area after the intersection includes: Based on the gas logging total hydrocarbon increase multiple range, the gas logging total hydrocarbon increase multiple and the acoustic wave curve are intersected, and spacing grid line matching is performed to calculate the envelope area after the intersection and spacing grid line matching.

6. The method for identifying ultra-low resistivity oil and gas layers by integrating measurement and recording according to claim 1 is characterized in that: The area forms include a box-shaped area form, a half-box-shaped area form, an equilateral triangle area form, an inverted triangle area form, a bell-shaped area form, a finger-shaped area form and a peak-shaped area form.

7. The method for identifying ultra-low resistivity oil and gas layers by integrating measurement and recording according to any one of claims 1 to 6, characterized in that: The method of identifying the type of the ultra-low resistivity oil and gas layer based on the envelope area and the fluid property to obtain an ultra-low resistivity oil and gas layer type identification result includes: Obtaining each preset envelope area range, and generating an oil and gas layer type identification standard according to each envelope area range and in combination with the envelope area and fluid properties; The oil and gas layer type identification standard is used to identify the oil and gas layer type of the ultra-low resistivity oil and gas layer to obtain the ultra-low resistivity oil and gas layer type identification result.

8. A device for identifying ultra-low-resistance oil and gas layers by integrating measurement and recording, characterized in that: include: A characteristic value determination module is used to obtain the oil test conditions of the ultra-low resistivity oil and gas layer, and determine the well logging characteristic value and the mud logging characteristic value according to the oil test conditions; A curve combination and intersection module is used to merge the logging characteristic value and the logging characteristic value so as to calculate and draw the gas logging total hydrocarbon increase multiple and the acoustic wave curve, combine the gas logging total hydrocarbon increase multiple and the acoustic wave curve, determine the gas logging total hydrocarbon increase multiple range according to the oil test situation, and intersect the gas logging total hydrocarbon increase multiple and the acoustic wave curve based on the gas logging total hydrocarbon increase multiple range to calculate the envelope area after the intersection; A fluid property determination module, used to determine the area shape of the envelope area, and determine the fluid property of the reservoir including the ultra-low resistivity oil and gas layer according to the area shape; The identification module is used to identify the type of the ultra-low resistivity oil and gas layer based on the envelope area and the fluid properties to obtain an ultra-low resistivity oil and gas layer type identification result.

9. An electronic device, characterized in that: include: Memory, used to store computer programs; A processor is used to execute the computer program to implement the method for identifying ultra-low-resistance oil and gas layers by integrating measurement and recording as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: Used to store computer programs; wherein, when the computer program is executed by a processor, the method for identifying ultra-low-resistance oil and gas layers by integrating measurement and recording as described in any one of claims 1 to 7 is implemented.

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