WO2018018865A1 - 油藏中贼层的识别方法及装置 - Google Patents

油藏中贼层的识别方法及装置 Download PDF

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Publication number
WO2018018865A1
WO2018018865A1 PCT/CN2017/072146 CN2017072146W WO2018018865A1 WO 2018018865 A1 WO2018018865 A1 WO 2018018865A1 CN 2017072146 W CN2017072146 W CN 2017072146W WO 2018018865 A1 WO2018018865 A1 WO 2018018865A1
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Prior art keywords
reservoir
contribution
unit thickness
minimum
coefficient
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French (fr)
Inventor
魏晨吉
李勇
李保柱
宋本彪
张琪
熊礼晖
郑洁
张为民
张晶
王�琦
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Petrochina Co Ltd
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Petrochina Co Ltd
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/14—Obtaining from a multiple-zone well

Definitions

  • the invention relates to the technical field of carbonate rock reservoir development, in particular to a method and a device for identifying a thief layer in a reservoir.
  • the thief layer refers to a thin layer with a permeability much higher than the average permeability of the reservoir.
  • the fluid mainly flows along the thief layer, causing the water to see too fast, seriously reducing the volume of the flow, resulting in an ineffective circulation of water injection, affecting the overall development effect of the oil field.
  • thief layers are generally identified and characterized by geological and static data, yield, production index, yield-increasing rate, single-layer liquid production index, and dimensionless pressure coefficient.
  • these dynamic and static identification methods have certain limitations.
  • the thief layer cannot be quantitatively identified; when the thief layer is identified based on the yield data, the concept of production pressure difference is not considered; and the production index, production-increasing rate, single-layer liquid production index, dimensionless pressure coefficient and other indicators are divided. In the thief layer, restrictions such as reservoir thickness or poor permeability are not considered. Currently, there is still no way to be relatively accurate and to quickly identify thief layers.
  • Embodiments of the present invention provide a method for identifying a thief layer in a reservoir to solve the technical problem of low accuracy of thief layer identification in the prior art.
  • the method comprises: calculating a single reservoir unit thickness yield contribution value and a relative contribution coefficient of each reservoir of the reservoir production logging, wherein the single reservoir unit thickness yield contribution value is a single reservoir yield and a single reservoir thickness Ratio, the relative contribution coefficient is a ratio of the contribution value of the unit thickness of the single reservoir to the unit thickness of the total reservoir section; according to the characteristics of different reservoirs, the contribution of the single reservoir layer thickness yield from the reservoir production logging Among the values and relative contribution coefficients, the minimum single reservoir unit thickness yield contribution value and the minimum relative contribution coefficient are determined, wherein the minimum single reservoir unit thickness yield contribution value and the minimum relative contribution coefficient are consistent with the thief layer identification in different reservoirs.
  • the embodiment of the invention further provides an identification device for a thief layer in a reservoir to solve the technical problem of low accuracy of thief layer recognition in the prior art.
  • the device comprises: a first calculation module, configured to calculate a single reservoir unit thickness yield contribution value and a relative contribution coefficient of each reservoir of the reservoir production logging, wherein the single reservoir unit thickness yield contribution value is a single reservoir The ratio of the yield to the thickness of the single reservoir, the relative contribution coefficient is the contribution of the single reservoir to the unit thickness and the total contribution The ratio of the unit thickness of the reservoir section; the determination module is used to determine the minimum single-story unit thickness yield from the single-reservoir unit thickness yield contribution value and relative contribution coefficient of the reservoir production logging according to the characteristics of different reservoirs a contribution value and a minimum relative contribution coefficient, wherein the minimum single reservoir unit thickness yield contribution value and the minimum relative contribution coefficient meet the requirements of thief layer identification in different reservoirs; and the second calculation module is used to calculate the reservoir to be tested Single reservoir unit thickness contribution contribution value and relative contribution coefficient
  • the single-reservoir unit thickness production contribution value and the relative contribution coefficient of each reservoir of the reservoir production logging are calculated (for example, the reservoir production logging can be calculated based on the dynamic monitoring data of the reservoir production logging).
  • Each reservoir has a single reservoir thickness contribution value and a relative contribution coefficient), and determines the minimum single reservoir thickness contribution value and the minimum relative contribution coefficient according to the characteristics of different reservoirs.
  • the relationship between the single-reservoir unit thickness yield contribution value of the layer and the minimum single reservoir unit thickness yield contribution value and the relative contribution coefficient of each reservoir per well and the minimum relative contribution coefficient can quickly determine each port. Whether each reservoir in the well develops a thief layer. Since the calculation of the unit thickness thickness yield contribution and the relative contribution coefficient of the single reservoir fully considers the influence of the thickness on the yield contribution, the thief layer identification is more in line with the actual situation and helps to improve the accuracy of the thief layer identification.
  • FIG. 1 is a flow chart showing a method for identifying a thief layer in a reservoir according to an embodiment of the present invention
  • FIG. 3 is a schematic view showing the identification of a thief layer in a carbonate reservoir in an embodiment of the present invention
  • FIG. 4 is a structural block diagram of an apparatus for identifying a thief layer in a reservoir according to an embodiment of the present invention
  • FIG. 5 is an apparatus according to an embodiment of the present invention.
  • FIG. 1 is a flow chart of a method for identifying a thief layer in a reservoir according to an embodiment of the present invention. As shown in FIG. 1 , the method for identifying a thief layer in a reservoir in the embodiment of the present invention may include:
  • Step 101 Calculate a single reservoir unit thickness yield contribution value and a relative contribution coefficient of each reservoir of the reservoir production logging, wherein the single reservoir unit thickness yield contribution value is a ratio of the single reservoir production to the single reservoir thickness.
  • the relative contribution coefficient is a ratio of the unit thickness thickness yield contribution of the single reservoir to the unit thickness thickness of the total reservoir segment;
  • Step 102 Determine a minimum single reservoir thickness contribution value and a minimum relative contribution coefficient from a single reservoir thickness contribution value and a relative contribution coefficient of a reservoir production log according to characteristics of different reservoirs, wherein The minimum single reservoir unit thickness yield contribution value and the minimum relative contribution coefficient meet the requirements for thief layer identification in different reservoirs;
  • Step 103 Calculate a single reservoir unit thickness yield contribution value and a relative contribution coefficient for each reservoir of each well in the reservoir to be tested;
  • Step 104 According to the relationship between the single reservoir layer thickness yield contribution value of each reservoir and the minimum single reservoir unit thickness yield contribution value and the relative contribution coefficient of each reservoir per well The relationship between the minimum relative contribution coefficients and the determination of whether each reservoir in each well develops a thief layer.
  • the single-reservoir unit thickness yield contribution value and the relative contribution coefficient of each reservoir of the reservoir production logging are calculated (for example, the dynamic monitoring of the reservoir production logging can be based on The data is used to calculate the single-layer unit thickness yield contribution value and relative contribution coefficient of each reservoir in the reservoir production logging, and the minimum single-layer unit thickness yield contribution value and the minimum relative contribution coefficient are determined according to the characteristics of different reservoirs.
  • the thickness of each single well single layer (ie, single reservoir) and the corresponding single layer production can be obtained, and then the percentage of single layer thickness and the percentage of single layer production can be obtained.
  • the single-layer unit thickness production contribution value and relative contribution coefficient RCI are calculated using single well single layer production, single layer thickness, single layer thickness percentage, and single layer production percentage.
  • the yield of the i-th layer is Q i
  • the thickness of the i-th layer is h i
  • the total production of the reservoir is Q t
  • the total thickness of the reservoir is h t .
  • the horizontal coordinate of the thief layer identification plate ie, the contribution value of the unit thickness of the single reservoir
  • This parameter can effectively solve the problem of the previous thief layer identification method.
  • the relative contribution coefficient of each reservoir in each well is related to the minimum relative value and the contribution coefficient, and it is determined whether each reservoir develops a thief layer in each well, including: a single reservoir for reservoir production
  • the contribution value of the reservoir unit thickness is the ordinate
  • the relative contribution coefficient of each reservoir in the reservoir production logging is plotted on the abscissa, wherein the minimum single reservoir unit thickness yield contribution value and the minimum relative contribution coefficient intersection line Dividing the plot into different regions; according to the single reservoir level thickness yield contribution value of each reservoir of each well and the relative contribution coefficient of each reservoir in each well in different locations in the plot, Determine if each reservoir in each well develops a thief layer.
  • the single-reservoir unit thickness production contribution value of each reservoir in the reservoir production logging is the ordinate
  • the relative contribution coefficient of each reservoir in the reservoir production logging is plotted on the abscissa
  • the intersection of the minimum single reservoir unit thickness yield contribution value and the minimum relative contribution coefficient divides the plot into different regions, that is, according to the coordinate value of the minimum single reservoir unit thickness yield contribution value and the minimum relative contribution coefficient, the minimum single storage
  • the intersection of the layer unit thickness yield contribution value and the minimum relative contribution coefficient divides the plot into different regions, for example, the development thief layer area, the undeveloped thief layer area, and the unit thickness yield value are too low regardless of the area, according to each well
  • the distribution of data in different reservoirs can be quickly determined to determine whether it is a developmental thief layer.
  • the relationship between the single-reservoir unit thickness yield contribution value of each reservoir and the contribution of the minimum single reservoir unit thickness yield contribution value, and the relative contribution coefficient of each reservoir in each well The relationship between the minimum relative contribution coefficients and the determination of whether each reservoir in each well develops a thief layer, including: the reservoir contribution value of the unit thickness of the single reservoir is less than the contribution of the minimum single reservoir unit thickness yield.
  • the reservoir with a single reservoir unit thickness yield contribution value greater than the minimum single reservoir unit thickness yield contribution value and a relative contribution coefficient smaller than the minimum relative contribution coefficient is determined as a non-thief layer; a single reservoir unit thickness yield The reservoir whose contribution value is greater than the minimum single reservoir unit thickness yield contribution value and whose relative contribution coefficient is greater than the minimum relative contribution coefficient is determined to be a thief layer.
  • the minimum single reservoir unit thickness yield contribution value and the minimum relative contribution coefficient may be determined for different reservoirs. Since the single layer of single reservoir thickness contribution is too low to affect the reservoir water injection development, it does not have the value of thief layer identification. Therefore, it is necessary to determine a minimum single reservoir thickness contribution value. Due to differences in physical properties such as reservoirs, the contribution of the minimum single reservoir thickness per unit of different reservoirs should be different. Generally, a single reservoir can be used. Half of the average value of the unit thickness yield contribution, for example, for a carbonate reservoir, the minimum single reservoir unit thickness yield contribution may be 50 stb/ft.
  • the relative contribution coefficient of the thief layer is determined to be greater than or equal to 2, for example, for carbonate rocks.
  • the minimum relative contribution factor is 2.
  • the identification method of the thief layer in the above reservoir is described below in conjunction with a specific example. Take carbonate rock reservoirs as an example.
  • the method is used to identify the position of the thief layer, and the collected data is the logging data of the carbonate reservoir production, including the thickness of all the single layers and the corresponding single layer production. After all the data is collected and the quality control is performed, the identification process is Can be started.
  • a single layer with a single reservoir thickness contribution value is too low to affect the reservoir water injection development, and does not have the value of thief layer identification. Therefore, it is necessary to determine a minimum single reservoir thickness contribution value. Due to the differences in physical properties of the reservoir, the contribution value of the unit thickness of the single reservoir in different reservoirs should be different. Generally, half of the average value of the contribution per unit thickness of the single reservoir can be used. In this embodiment, the average contribution value of the unit thickness of the single reservoir is 98.53stb/ft, and the contribution of the unit thickness of the smallest single reservoir can be 50stb/ft.
  • the relative contribution coefficient is the ratio of the contribution value of the unit thickness of the single reservoir to the total output of the unit thickness. The higher the value, the greater the productivity of the single layer.
  • the capacity contribution of the thief layer is greater than the overall productivity of the reservoir. Generally, the thief layer determines that the relative contribution coefficient is greater than or equal to 2, and the example takes 2.
  • the abscissa takes the contribution value of the unit thickness of the single reservoir, and the ordinate draws the relative contribution coefficient to draw the discriminating plate.
  • the relative contribution rate and the unit yield contribution discriminant map are divided into three sections.
  • the contribution value of the minimum single reservoir unit thickness yield is 50stb/ft
  • the relative contribution coefficient of the thief layer is determined to be 2
  • the three discriminating zones ie, the three regions that are not considered, the development thief layer, and the undeveloped thief layer
  • the data points include: single reservoir unit thickness yield contribution value and relative contribution coefficient
  • the abscissa is smaller than the minimum single-layer unit thickness yield contribution value. It indicates that the unit yield contribution of this layer is not enough to cause the impact of reservoir water injection development, and will not be considered.
  • the data points of 21 single layers are located on the lower right side of the discriminating plate (ie, the region where the thief layer is not developed). The contribution of unit production of these single layers has reached the level that can affect the development of reservoir water injection, but the relative contribution coefficient is low, and it is recognized as a non-thief layer.
  • the data points of 17 single layers are distributed on the upper right side of the discriminating plate (ie, the development thief layer area). It indicates that the unit yield contribution value reaches the level of affecting reservoir water injection development, and the relative contribution coefficient is higher than that of common reservoir, which is judged as the thief layer development horizon.
  • an embodiment of the present invention further provides an identification device for a thief layer in a reservoir, as described in the following embodiments. Since the principle of solving the problem in the identification device of the thief layer in the reservoir is similar to the identification method of the thief layer in the reservoir, the implementation of the identification device of the thief layer in the reservoir can be referred to the implementation of the identification method of the thief layer in the reservoir, repeating I won't go into details here.
  • the term "unit” or "module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 4 is a structural block diagram of a device for identifying a thief layer in a reservoir according to an embodiment of the present invention, as shown in FIG. 4, including:
  • the first calculation module 401 is configured to calculate a single reservoir unit thickness yield contribution value and a relative contribution coefficient of each reservoir of the reservoir production logging, wherein the single reservoir unit thickness yield contribution value is a single reservoir production and a single a ratio of the thickness of the reservoir, wherein the relative contribution coefficient is a ratio of the contribution value of the unit thickness of the single reservoir to the unit thickness of the total reservoir section;
  • the determining module 402 is configured to determine a minimum single reservoir unit thickness yield contribution value and a minimum relative contribution coefficient from a single reservoir unit thickness yield contribution value and a relative contribution coefficient of the reservoir production logging according to characteristics of different reservoirs, wherein, the minimum single reservoir unit thickness yield contribution value and the minimum relative contribution coefficient meet the requirements for thief layer identification in different reservoirs;
  • a second calculation module 403 configured to calculate a single reservoir unit thickness yield contribution value and a relative contribution coefficient of each reservoir of each well in the reservoir to be tested;
  • the identification module 404 is configured to calculate a relationship between a single reservoir thickness contribution value of each reservoir of each well and a contribution value of the minimum single reservoir unit thickness yield and a relative contribution coefficient of each reservoir of each well A relationship between the minimum relative contribution coefficients and the minimum relative contribution coefficient is determined to determine whether each reservoir in each well develops a thief layer.
  • the identification module comprises: a drawing unit, configured to use a single reservoir layer thickness yield contribution value of each reservoir of the reservoir production logging to be an ordinate, and to produce a log reservoir for the reservoir
  • the relative contribution coefficient is plotted on the abscissa, wherein the intersection of the minimum single reservoir unit thickness yield contribution value and the minimum relative contribution coefficient divides the drawing into different regions; the identification unit is used for each well according to each well
  • the single-reservoir unit thickness yield contribution value of the reservoir and the relative contribution coefficient of each reservoir in each well are distributed in different regions of the plot to determine whether each reservoir develops a thief layer in each well.
  • the identification module is specifically configured to determine a reservoir having a single reservoir unit thickness yield contribution value smaller than the minimum single reservoir unit thickness yield contribution value;
  • the reservoir whose value is greater than the minimum single reservoir unit thickness yield contribution value and whose relative contribution coefficient is smaller than the minimum relative contribution coefficient is determined as a non-thief layer;
  • the single reservoir unit thickness yield contribution value is greater than the minimum single reservoir unit
  • the reservoir having a thickness yield contribution value and a relative contribution coefficient greater than the minimum relative contribution coefficient is determined as a thief layer.
  • the minimum single reservoir unit thickness yield contribution is 50 and the minimum relative contribution factor is two.
  • the first calculating module 401, the determining module 402, the second calculating module 403, and the identifying module 404 may be software, hardware, or a combination of the two, for example, Components such as processing chips for functions.
  • Embodiments of the present invention also provide a computer readable storage medium comprising computer readable instructions, when executed, causing a processor to perform at least the following operations: calculating a single storage of each reservoir of a reservoir production log a unit thickness thickness yield contribution value and a relative contribution coefficient, wherein the single reservoir unit thickness yield contribution value is a ratio of a single reservoir production to a single reservoir thickness, and the relative contribution coefficient is the single reservoir layer thickness yield The ratio of the contribution value to the unit thickness of the total reservoir section; according to the characteristics of different reservoirs, determine the contribution of the smallest single reservoir unit thickness yield from the single reservoir thickness contribution value and relative contribution coefficient of the reservoir production logging.
  • the computer readable instructions cause the processor to contribute a single reservoir thickness contribution of each reservoir in a reservoir production log to an ordinate, and a relative contribution coefficient of each reservoir in a reservoir production log.
  • An absc issa plot in which the intersection of the minimum single reservoir unit thickness yield contribution value and the minimum relative contribution coefficient divides the plot into different regions; a single reservoir unit thickness yield per reservoir according to each well The contribution value and the relative contribution coefficient of each reservoir in each well are located in different regions of the plot to determine whether each reservoir develops a thief layer in each well.
  • the computer readable instructions cause the processor to not determine a reservoir having a single reservoir unit thickness yield contribution value less than the minimum single reservoir unit thickness yield contribution value; a value greater than the minimum single reservoir unit thickness yield contribution value and a relative contribution coefficient less than the minimum relative contribution coefficient
  • the reservoir is determined to be a non-thief layer; the reservoir having a single reservoir unit thickness yield contribution value greater than the minimum single reservoir unit thickness yield contribution value and a relative contribution coefficient greater than the minimum relative contribution coefficient is determined as a thief layer.
  • the embodiment of the present invention further provides an apparatus.
  • the apparatus includes: a processor 501; and a memory 502 including computer readable instructions that, when executed, cause the processor to perform the following operations: Calculating a single reservoir unit thickness yield contribution value and a relative contribution coefficient of each reservoir of the reservoir production logging, wherein the single reservoir unit thickness yield contribution value is a ratio of a single reservoir production to a single reservoir thickness, The relative contribution coefficient is the ratio of the contribution value of the unit thickness of the single reservoir to the unit thickness of the total reservoir section; according to the characteristics of different reservoirs, the contribution value and relative contribution of the unit thickness of the single reservoir from the reservoir production logging Among the coefficients, the minimum single reservoir unit thickness yield contribution value and the minimum relative contribution coefficient are determined, wherein the minimum single reservoir unit thickness yield contribution value and the minimum relative contribution coefficient meet the requirements of thief layer identification in different reservoirs; Measuring the contribution value and relative contribution coefficient of the single reservoir unit thickness per reservoir in each well in the reservoir; according to the single reservoir unit thickness of each
  • the computer readable instructions cause the processor to contribute a single reservoir thickness contribution of each reservoir in a reservoir production log to an ordinate, and a relative contribution coefficient of each reservoir in a reservoir production log.
  • An absc issa plot in which the intersection of the minimum single reservoir unit thickness yield contribution value and the minimum relative contribution coefficient divides the plot into different regions; a single reservoir unit thickness yield per reservoir according to each well The contribution value and the relative contribution coefficient of each reservoir in each well are located in different regions of the plot to determine whether each reservoir develops a thief layer in each well.
  • the computer readable instructions cause the processor to not determine a reservoir having a single reservoir unit thickness yield contribution value less than the minimum single reservoir unit thickness yield contribution value;
  • the reservoir whose value is greater than the minimum single reservoir unit thickness yield contribution value and whose relative contribution coefficient is smaller than the minimum relative contribution coefficient is determined as a non-thief layer;
  • the single reservoir unit thickness yield contribution value is greater than the minimum single reservoir unit
  • the reservoir having a thickness yield contribution value and a relative contribution coefficient greater than the minimum relative contribution coefficient is determined as a thief layer.
  • the single-reservoir unit thickness production contribution value and the relative contribution coefficient of each reservoir of the reservoir production logging are calculated (for example, the reservoir production logging can be calculated based on the dynamic monitoring data of the reservoir production logging).
  • Each reservoir has a single reservoir thickness contribution value and a relative contribution coefficient), and determines the minimum single reservoir thickness contribution value and the minimum relative contribution coefficient according to the characteristics of different reservoirs.
  • the relationship between the single-reservoir unit thickness yield contribution value of the layer and the minimum single reservoir unit thickness yield contribution value and the relative contribution coefficient of each reservoir per well and the minimum relative contribution coefficient can quickly determine each port. Whether each reservoir in the well develops a thief Floor. Since the calculation of the unit thickness thickness yield contribution and the relative contribution coefficient of the single reservoir fully considers the influence of the thickness on the yield contribution, the thief layer identification is more in line with the actual situation and helps to improve the accuracy of the thief layer identification.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

一种油藏中贼层的识别方法及装置，其中，该方法包括：计算油藏生产测井各储层的单储层单位厚度产量贡献值和相对贡献系数，相对贡献系数是单储层单位厚度产量贡献值与总储层段单位厚度产量的比值；根据不同油藏的特性，从油藏生产测井的单储层单位厚度产量贡献值和相对贡献系数中，确定最小单储层单位厚度产量贡献值和最小相对贡献系数；计算待测油藏中每口井每个储层的单储层单位厚度产量贡献值和相对贡献系数；根据每口井每个储层的单储层单位厚度产量贡献值与最小单储层单位厚度产量贡献值的大小关系和每口井每个储层的相对贡献系数与最小相对贡献系数的大小关系，确定每口井每个储层是否发育贼层。

Description

油藏中贼层的识别方法及装置 技术领域
本发明涉及碳酸盐岩油藏开发技术领域，尤其涉及油藏中贼层的识别方法及装置。
背景技术
贼层是指渗透率远高于储层平均渗透率的薄层，流体主要沿着贼层流动，导致见水过快，严重降低波及体积，导致注水无效循环，影响油田整体开发效果。目前，一般通过地质静态资料、产量、产液指数、产增贡献率、单层产液指数、无因次压力系数等来识别并表征贼层。但这些动、静态识别方法均存在一定的局限性。基于地质静态资料无法定量识别贼层；基于产量数据识别贼层时，未考虑生产压差的概念；以产液指数、产增贡献率、单层产液指数、无因次压力系数等指标划分贼层时，未考虑储层厚度或渗透率极差等限制条件。目前，仍然没有一种相对准确并可以快速识别贼层的方法。
发明内容
本发明实施例提供一种油藏中贼层的识别方法，以解决现有技术中贼层识别的准确度低的技术问题。该方法包括：计算油藏生产测井各储层的单储层单位厚度产量贡献值和相对贡献系数，其中，所述单储层单位厚度产量贡献值是单储层产量与单储层厚度的比值，所述相对贡献系数是所述单储层单位厚度产量贡献值与总储层段单位厚度产量的比值；根据不同油藏的特性，从油藏生产测井的单储层单位厚度产量贡献值和相对贡献系数中，确定最小单储层单位厚度产量贡献值和最小相对贡献系数，其中，所述最小单储层单位厚度产量贡献值和最小相对贡献系数符合不同油藏中贼层识别的要求；计算待测油藏中每口井每个储层的单储层单位厚度产量贡献值和相对贡献系数；根据每口井每个储层的单储层单位厚度产量贡献值与所述最小单储层单位厚度产量贡献值的大小关系和每口井每个储层的相对贡献系数与所述最小相对贡献系数的大小关系，确定每口井每个储层是否发育贼层。
本发明实施例还提供一种油藏中贼层的识别装置，以解决现有技术中贼层识别的准确度低的技术问题。该装置包括：第一计算模块，用于计算油藏生产测井各储层的单储层单位厚度产量贡献值和相对贡献系数，其中，所述单储层单位厚度产量贡献值是单储层产量与单储层厚度的比值，所述相对贡献系数是所述单储层单位厚度产量贡献值与总 储层段单位厚度产量的比值；确定模块，用于根据不同油藏的特性，从油藏生产测井的单储层单位厚度产量贡献值和相对贡献系数中，确定最小单储层单位厚度产量贡献值和最小相对贡献系数，其中，所述最小单储层单位厚度产量贡献值和最小相对贡献系数符合不同油藏中贼层识别的要求；第二计算模块，用于计算待测油藏中每口井每个储层的单储层单位厚度产量贡献值和相对贡献系数；识别模块，用于根据每口井每个储层的单储层单位厚度产量贡献值与所述最小单储层单位厚度产量贡献值的大小关系和每口井每个储层的相对贡献系数与所述最小相对贡献系数的大小关系，确定每口井每个储层是否发育贼层。
在本发明实施例中，通过计算油藏生产测井各储层的单储层单位厚度产量贡献值和相对贡献系数(例如，可以基于油藏生产测井的动态监测数据计算油藏生产测井各储层的单储层单位厚度产量贡献值和相对贡献系数)，并根据不同油藏的特性确定最小单储层单位厚度产量贡献值和最小相对贡献系数，最后，根据每口井每个储层的单储层单位厚度产量贡献值与最小单储层单位厚度产量贡献值的大小关系和每口井每个储层的相对贡献系数与最小相对贡献系数的大小关系，即可快速确定每口井每个储层是否发育贼层。由于单储层单位厚度产量贡献值和相对贡献系数的计算充分考虑了厚度对产量贡献的影响，使得贼层识别更符合实际情况，有助于提高贼层识别的准确度。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。在附图中：
图1为本发明实施例中的油藏中贼层的识别方法的流程图；
图2为本发明实施例中的贼层识别的判别图版；
图3为本发明实施例中的碳酸盐岩油藏中贼层识别的示意图；
图4为本发明实施例中的油藏中贼层的识别装置的结构框图；
图5为本发明实施例中的一种设备。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚明白，下面结合附图对本发明实施例做进一步详细说明。在此，本发明的示意性实施例及其说明用于解释本发明，但并不作为对本发明的限定。
图1为本发明实施例中油藏中贼层的识别方法的流程图。如图1所示，本发明实施例中油藏中贼层的识别方法可以包括：
步骤101：计算油藏生产测井各储层的单储层单位厚度产量贡献值和相对贡献系数，其中，所述单储层单位厚度产量贡献值是单储层产量与单储层厚度的比值，所述相对贡献系数是所述单储层单位厚度产量贡献值与总储层段单位厚度产量的比值；
步骤102：根据不同油藏的特性，从油藏生产测井的单储层单位厚度产量贡献值和相对贡献系数中，确定最小单储层单位厚度产量贡献值和最小相对贡献系数，其中，所述最小单储层单位厚度产量贡献值和最小相对贡献系数符合不同油藏中贼层识别的要求；
步骤103：计算待测油藏中每口井每个储层的单储层单位厚度产量贡献值和相对贡献系数；
步骤104：根据每口井每个储层的单储层单位厚度产量贡献值与所述最小单储层单位厚度产量贡献值的大小关系和每口井每个储层的相对贡献系数与所述最小相对贡献系数的大小关系，确定每口井每个储层是否发育贼层。
由图1可以得知，在本发明实施例中，通过计算油藏生产测井各储层的单储层单位厚度产量贡献值和相对贡献系数(例如，可以基于油藏生产测井的动态监测数据计算油藏生产测井各储层的单储层单位厚度产量贡献值和相对贡献系数)，并根据不同油藏的特性确定最小单储层单位厚度产量贡献值和最小相对贡献系数，最后，根据每口井每个储层的单储层单位厚度产量贡献值与最小单储层单位厚度产量贡献值的大小关系和每口井每个储层的相对贡献系数与最小相对贡献系数的大小关系，即可快速确定每口井每个储层是否发育贼层。由于单储层单位厚度产量贡献值和相对贡献系数的计算充分考虑了厚度对产量贡献的影响，使得贼层的识别更符合实际情况，有助于提高贼层识别的准确度。
具体实施时，可以采用现场生产测井监测数据为基础，获取所有单井单层(即单储层)的厚度及对应的单层产量，进而求得单层厚度百分比和单层产量百分比，最后利用单井单层产量、单层厚度、单层厚度百分比以及单层产量百分比，计算单储层单位厚度产量贡献值和相对贡献系数RCI。
具体实施时，假设储层段有n个单层，第i层的产量为Qi，第i层的厚度为hi，储层总产量为Qt，储层总厚度为ht。贼层识别图版横坐标(即单储层单位厚度产量贡献值)为单层产量与单层厚度之比，即单储层单位厚度产量贡献值，该参数可有效解决以往贼层识别方法中未考虑贼层厚度的问题。
具体实施时，为了可以进一步快速识别贼层，在本实施例中，根据每口井每个储层的单储层单位厚度产量贡献值与所述最小单储层单位厚度产量贡献值的大小关系和每口井每个储层的相对贡献系数与所述最小相对，贡献系数的大小关系，确定每口井每个储层是否发育贼层，包括：以油藏生产测井各储层的单储层单位厚度产量贡献值为纵坐标、以油藏生产测井各储层的相对贡献系数为横坐标绘图，其中，所述最小单储层单位厚度产量贡献值和最小相对贡献系数的交汇线将所述绘图分为不同的区域；根据每口井每个储层的单储层单位厚度产量贡献值和每口井每个储层的相对贡献系数在所述绘图中不同区域的分布位置，确定每口井每个储层是否发育贼层。
具体的，如图2所示，以油藏生产测井各储层的单储层单位厚度产量贡献值为纵坐标、以油藏生产测井各储层的相对贡献系数为横坐标绘图后，最小单储层单位厚度产量贡献值和最小相对贡献系数的交汇线将绘图分为不同的区域，即根据坐标值最小单储层单位厚度产量贡献值和最小相对贡献系数的大小关系，最小单储层单位厚度产量贡献值和最小相对贡献系数的交汇线将绘图分为不同的区域，例如，发育贼层区域、不发育贼层区域以及单位厚度产量值过低不考虑区域，根据每口井每个储层的数据在不同区域的分布位置即可快速确定是否是发育贼层。
具体实施时，根据每口井每个储层的单储层单位厚度产量贡献值与所述最小单储层单位厚度产量贡献值的大小关系和每口井每个储层的相对贡献系数与所述最小相对贡献系数的大小关系，确定每口井每个储层是否发育贼层，包括：对单储层单位厚度产量贡献值小于所述最小单储层单位厚度产量贡献值的储层不进行判断；将单储层单位厚度产量贡献值大于所述最小单储层单位厚度产量贡献值且相对贡献系数小于所述最小相对贡献系数的储层确定为非贼层；将单储层单位厚度产量贡献值大于所述最小单储层单位厚度产量贡献值且相对贡献系数大于所述最小相对贡献系数的储层确定为贼层。
具体实施时，最小单储层单位厚度产量贡献值和最小相对贡献系数可以针对不同油藏进行确定。由于单储层单位厚度产量贡献值过低的单层不足以影响油藏注水开发，不具有贼层识别的价值，因此需确定一个最小单储层单位厚度产量贡献值。由于油藏物性等因素的差异，不同油藏的最小单储层单位厚度产量贡献值应不同，一般可采用单储层 单位厚度产量贡献值的平均值的一半，例如，针对碳酸盐岩油藏，最小单储层单位厚度产量贡献值为可以为50stb/ft。最小相对贡献系数越高，则表明该单层的产能越大，贼层的产能贡献大于储层整体产能，一般定义贼层判定相对贡献系数为大于等于2的数值，例如，针对碳酸盐岩油藏，最小相对贡献系数为2。
以下结合具体示例描述上述油藏中贼层的识别方法。以碳酸盐岩油藏为例。
(1)数据采集与数据质量控制
利用本方法识别贼层位置，采集数据为碳酸盐岩油藏生产测井数据，具体包括所有单层的厚度及对应的单层产量，当所有数据收集完毕并进行质量控制之后，识别过程即可启动。
本实施例基于初筛结果，有25口井的110个单层数据，利用单层产量、单层厚度、单层厚度百分比、单层产量百分比计算单储层单位厚度产量贡献值和相对贡献系数RCI，结果如表1所示。
表1一组碳酸盐岩贼层识别候选井数据
Figure PCTCN2017072146-appb-000001
Figure PCTCN2017072146-appb-000002
Figure PCTCN2017072146-appb-000003
(2)确定单储层单位厚度产量贡献值
单储层单位厚度产量贡献值过低的单层不足以影响油藏注水开发，不具有贼层识别的价值，因此需确定一个最小单储层单位厚度产量贡献值。由于油藏物性等因素的差异，不同油藏的单储层单位厚度产量贡献值取值应不同，一般可采用单储层单位厚度产量贡献值的平均值的一半。本实施例单储层单位厚度产量贡献值平均值为98.53stb/ft，最小单储层单位厚度产量贡献值可以取50stb/ft。
(3)确定贼层判定相对贡献系数
相对贡献系数是单储层单位厚度产量贡献值与单位厚度总产量的比值，该值越高，则表明该单层的产能越大。贼层的产能贡献大于储层整体产能，一般定义贼层判定相对贡献系数为大于等于2的数值，该实例取2。
(4)绘制相对贡献系数与单储层单位厚度产量贡献值判别图版
横坐标取单储层单位厚度产量贡献值，纵坐标取相对贡献系数绘制判别图版。依据不同油藏适用的判定条件，将相对贡献率与单位产量贡献判别图版出为三个分区。本实施例最小单储层单位厚度产量贡献值取50stb/ft，贼层判定相对贡献系数取2，三个判别分区(即不予考虑、发育贼层以及不发育贼层三个区域)如图2、3所示。
(5)基于判别图版进行贼层识别
识别结果如图3所示，在图3中通过虚线表示出不予考虑、发育贼层以及不发育贼层三个区域：
1、依据相对贡献率与单储层单位厚度产量贡献值判别图版，本实施例数据中有72个单层的数据点(该数据点包括：单储层单位厚度产量贡献值和相对贡献系数)位于图版左侧(即不予考虑区域)，即横坐标小于最小单储层单位厚度产量贡献值。表明该层的单位产量贡献不足以导致影响油藏注水开发，不予考虑。
2、21个单层的数据点位于判别图版右下侧(即不发育贼层区域)。这些单层的单位产量贡献已达到可影响油藏注水开发的水平，但相对贡献系数较低，识别为非贼层。
3、17个单层的数据点分布在判别图版右上侧(即发育贼层区域)。表明其单位产量贡献值达到影响油藏注水开发的水平，且相对贡献系数高于普通储层，判别为贼层发育层位。
基于同一发明构思，本发明实施例中还提供了一种油藏中贼层的识别装置，如下面的实施例所述。由于油藏中贼层的识别装置解决问题的原理与油藏中贼层的识别方法相似，因此油藏中贼层的识别装置的实施可以参见油藏中贼层的识别方法的实施，重复之处不再赘述。以下所使用的，术语“单元”或者“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图4是本发明实施例的油藏中贼层的识别装置的一种结构框图，如图4所示，包括：
第一计算模块401，用于计算油藏生产测井各储层的单储层单位厚度产量贡献值和相对贡献系数，其中，所述单储层单位厚度产量贡献值是单储层产量与单储层厚度的比值，所述相对贡献系数是所述单储层单位厚度产量贡献值与总储层段单位厚度产量的比值；
确定模块402，用于根据不同油藏的特性，从油藏生产测井的单储层单位厚度产量贡献值和相对贡献系数中，确定最小单储层单位厚度产量贡献值和最小相对贡献系数，其中，所述最小单储层单位厚度产量贡献值和最小相对贡献系数符合不同油藏中贼层识别的要求；
第二计算模块403，用于计算待测油藏中每口井每个储层的单储层单位厚度产量贡献值和相对贡献系数；
识别模块404，用于根据每口井每个储层的单储层单位厚度产量贡献值与所述最小单储层单位厚度产量贡献值的大小关系和每口井每个储层的相对贡献系数与所述最小相对贡献系数的大小关系，确定每口井每个储层是否发育贼层。
在一个实施例中，所述识别模块，包括：绘图单元，用于以油藏生产测井各储层的单储层单位厚度产量贡献值为纵坐标、以油藏生产测井各储层的相对贡献系数为横坐标绘图，其中，所述最小单储层单位厚度产量贡献值和最小相对贡献系数的交汇线将所述绘图分为不同的区域；识别单元，用于根据每口井每个储层的单储层单位厚度产量贡献值和每口井每个储层的相对贡献系数在所述绘图中不同区域的分布位置，确定每口井每个储层是否发育贼层。
在一个实施例中，所述识别模块：具体用于对单储层单位厚度产量贡献值小于所述最小单储层单位厚度产量贡献值的储层不进行判断；将单储层单位厚度产量贡献值大于所述最小单储层单位厚度产量贡献值且相对贡献系数小于所述最小相对贡献系数的储层确定为非贼层；将单储层单位厚度产量贡献值大于所述最小单储层单位厚度产量贡献值且相对贡献系数大于所述最小相对贡献系数的储层确定为贼层。
在一个实施例中，对于碳酸盐岩油藏，所述最小单储层单位厚度产量贡献值为50，所述最小相对贡献系数为2。
具体的，上述第一计算模块401、上述确定模块402、上述第二计算模块403以及上述识别模块404在实现各自的功能时，可以是软件、硬件或二者的结合，例如，可以是完成各自对应功能的处理芯片等元器件。
本发明实施例还提供了一种包括计算机可读指令的计算机可读存储介质，该计算机可读指令在被执行时使处理器至少执行以下操作：计算油藏生产测井各储层的单储层单位厚度产量贡献值和相对贡献系数，其中，所述单储层单位厚度产量贡献值是单储层产量与单储层厚度的比值，所述相对贡献系数是所述单储层单位厚度产量贡献值与总储层段单位厚度产量的比值；根据不同油藏的特性，从油藏生产测井的单储层单位厚度产量贡献值和相对贡献系数中，确定最小单储层单位厚度产量贡献值和最小相对贡献系数，其中，所述最小单储层单位厚度产量贡献值和最小相对贡献系数符合不同油藏中贼层识别的要求；计算待测油藏中每口井每个储层的单储层单位厚度产量贡献值和相对贡献系数；根据每口井每个储层的单储层单位厚度产量贡献值与所述最小单储层单位厚度产量贡献值的大小关系和每口井每个储层的相对贡献系数与所述最小相对贡献系数的大小关系，确定每口井每个储层是否发育贼层。
在一个实施例中，上述计算机可读指令使处理器以油藏生产测井各储层的单储层单位厚度产量贡献值为纵坐标、以油藏生产测井各储层的相对贡献系数为横坐标绘图，其中，所述最小单储层单位厚度产量贡献值和最小相对贡献系数的交汇线将所述绘图分为不同的区域；根据每口井每个储层的单储层单位厚度产量贡献值和每口井每个储层的相对贡献系数在所述绘图中不同区域的分布位置，确定每口井每个储层是否发育贼层。
在一个实施例中，上述计算机可读指令使处理器对单储层单位厚度产量贡献值小于所述最小单储层单位厚度产量贡献值的储层不进行判断；将单储层单位厚度产量贡献值大于所述最小单储层单位厚度产量贡献值且相对贡献系数小于所述最小相对贡献系数的 储层确定为非贼层；将单储层单位厚度产量贡献值大于所述最小单储层单位厚度产量贡献值且相对贡献系数大于所述最小相对贡献系数的储层确定为贼层。
本发明实施例还提供了一种设备，如图5所示，该设备包括：处理器501；和包括计算机可读指令的存储器502，计算机可读指令在被执行时使处理器执行以下操作：计算油藏生产测井各储层的单储层单位厚度产量贡献值和相对贡献系数，其中，所述单储层单位厚度产量贡献值是单储层产量与单储层厚度的比值，所述相对贡献系数是所述单储层单位厚度产量贡献值与总储层段单位厚度产量的比值；根据不同油藏的特性，从油藏生产测井的单储层单位厚度产量贡献值和相对贡献系数中，确定最小单储层单位厚度产量贡献值和最小相对贡献系数，其中，所述最小单储层单位厚度产量贡献值和最小相对贡献系数符合不同油藏中贼层识别的要求；计算待测油藏中每口井每个储层的单储层单位厚度产量贡献值和相对贡献系数；根据每口井每个储层的单储层单位厚度产量贡献值与所述最小单储层单位厚度产量贡献值的大小关系和每口井每个储层的相对贡献系数与所述最小相对贡献系数的大小关系，确定每口井每个储层是否发育贼层。
在一个实施例中，上述计算机可读指令使处理器以油藏生产测井各储层的单储层单位厚度产量贡献值为纵坐标、以油藏生产测井各储层的相对贡献系数为横坐标绘图，其中，所述最小单储层单位厚度产量贡献值和最小相对贡献系数的交汇线将所述绘图分为不同的区域；根据每口井每个储层的单储层单位厚度产量贡献值和每口井每个储层的相对贡献系数在所述绘图中不同区域的分布位置，确定每口井每个储层是否发育贼层。
在一个实施例中，上述计算机可读指令使处理器对单储层单位厚度产量贡献值小于所述最小单储层单位厚度产量贡献值的储层不进行判断；将单储层单位厚度产量贡献值大于所述最小单储层单位厚度产量贡献值且相对贡献系数小于所述最小相对贡献系数的储层确定为非贼层；将单储层单位厚度产量贡献值大于所述最小单储层单位厚度产量贡献值且相对贡献系数大于所述最小相对贡献系数的储层确定为贼层。
在本发明实施例中，通过计算油藏生产测井各储层的单储层单位厚度产量贡献值和相对贡献系数(例如，可以基于油藏生产测井的动态监测数据计算油藏生产测井各储层的单储层单位厚度产量贡献值和相对贡献系数)，并根据不同油藏的特性确定最小单储层单位厚度产量贡献值和最小相对贡献系数，最后，根据每口井每个储层的单储层单位厚度产量贡献值与最小单储层单位厚度产量贡献值的大小关系和每口井每个储层的相对贡献系数与最小相对贡献系数的大小关系，即可快速确定每口井每个储层是否发育贼 层。由于单储层单位厚度产量贡献值和相对贡献系数的计算充分考虑了厚度对产量贡献的影响，使得贼层识别更符合实际情况，有助于提高贼层识别的准确度。
本领域内的技术人员应明白，本发明的实施例可提供为方法、系统、或计算机程序产品。因此，本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
以上所述的具体实施例，对本发明的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本发明的具体实施例而已，并不用于限定本发明的保护范围，凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (8)

  1. 一种油藏中贼层的识别方法，其特征在于，包括：
    计算油藏生产测井各储层的单储层单位厚度产量贡献值和相对贡献系数，其中，所述单储层单位厚度产量贡献值是单储层产量与单储层厚度的比值，所述相对贡献系数是所述单储层单位厚度产量贡献值与总储层段单位厚度产量的比值；
    根据不同油藏的特性，从油藏生产测井的单储层单位厚度产量贡献值和相对贡献系数中，确定最小单储层单位厚度产量贡献值和最小相对贡献系数，其中，所述最小单储层单位厚度产量贡献值和最小相对贡献系数符合不同油藏中贼层识别的要求；
    计算待测油藏中每口井每个储层的单储层单位厚度产量贡献值和相对贡献系数；
    根据每口井每个储层的单储层单位厚度产量贡献值与所述最小单储层单位厚度产量贡献值的大小关系和每口井每个储层的相对贡献系数与所述最小相对贡献系数的大小关系，确定每口井每个储层是否发育贼层。
  2. 如权利要求1所述的油藏中贼层的识别方法，其特征在于，根据每口井每个储层的单储层单位厚度产量贡献值与所述最小单储层单位厚度产量贡献值的大小关系和每口井每个储层的相对贡献系数与所述最小相对，贡献系数的大小关系，确定每口井每个储层是否发育贼层，包括：
    以油藏生产测井各储层的单储层单位厚度产量贡献值为纵坐标、以油藏生产测井各储层的相对贡献系数为横坐标绘图，其中，所述最小单储层单位厚度产量贡献值和最小相对贡献系数的交汇线将所述绘图分为不同的区域；
    根据每口井每个储层的单储层单位厚度产量贡献值和每口井每个储层的相对贡献系数在所述绘图中不同区域的分布位置，确定每口井每个储层是否发育贼层。
  3. 如权利要求1或2所述的油藏中贼层的识别方法，其特征在于，根据每口井每个储层的单储层单位厚度产量贡献值与所述最小单储层单位厚度产量贡献值的大小关系和每口井每个储层的相对贡献系数与所述最小相对贡献系数的大小关系，确定每口井每个储层是否发育贼层，包括：
    对单储层单位厚度产量贡献值小于所述最小单储层单位厚度产量贡献值的储层不进行判断；将单储层单位厚度产量贡献值大于所述最小单储层单位厚度产量贡献值且相对贡献系数小于所述最小相对贡献系数的储层确定为非贼层；将单储层单位厚度产量贡献值大于所述最小单储层单位厚度产量贡献值且相对贡献系数大于所述最小相对贡献系数的储层确定为贼层。
  4. 如权利要求1或2所述的油藏中贼层的识别方法，其特征在于，对于碳酸盐岩油藏，所述最小单储层单位厚度产量贡献值为50，所述最小相对贡献系数为2。
  5. 一种油藏中贼层的识别装置，其特征在于，包括：
    第一计算模块，用于计算油藏生产测井各储层的单储层单位厚度产量贡献值和相对贡献系数，其中，所述单储层单位厚度产量贡献值是单储层产量与单储层厚度的比值，所述相对贡献系数是所述单储层单位厚度产量贡献值与总储层段单位厚度产量的比值；
    确定模块，用于根据不同油藏的特性，从油藏生产测井的单储层单位厚度产量贡献值和相对贡献系数中，确定最小单储层单位厚度产量贡献值和最小相对贡献系数，其中，所述最小单储层单位厚度产量贡献值和最小相对贡献系数符合不同油藏中贼层识别的要求；
    第二计算模块，用于计算待测油藏中每口井每个储层的单储层单位厚度产量贡献值和相对贡献系数；
    识别模块，用于根据每口井每个储层的单储层单位厚度产量贡献值与所述最小单储层单位厚度产量贡献值的大小关系和每口井每个储层的相对贡献系数与所述最小相对贡献系数的大小关系，确定每口井每个储层是否发育贼层。
  6. 如权利要求5所述的油藏中贼层的识别装置，其特征在于，所述识别模块，包括：
    绘图单元，用于以油藏生产测井各储层的单储层单位厚度产量贡献值为纵坐标、以油藏生产测井各储层的相对贡献系数为横坐标绘图，其中，所述最小单储层单位厚度产量贡献值和最小相对贡献系数的交汇线将所述绘图分为不同的区域；
    识别单元，用于根据每口井每个储层的单储层单位厚度产量贡献值和每口井每个储层的相对贡献系数在所述绘图中不同区域的分布位置，确定每口井每个储层是否发育贼层。
  7. 如权利要求5或6所述的油藏中贼层的识别装置，其特征在于，所述识别模块：具体用于对单储层单位厚度产量贡献值小于所述最小单储层单位厚度产量贡献值的储层不进行判断；将单储层单位厚度产量贡献值大于所述最小单储层单位厚度产量贡献值且相对贡献系数小于所述最小相对贡献系数的储层确定为非贼层；将单储层单位厚度产量贡献值大于所述最小单储层单位厚度产量贡献值且相对贡献系数大于所述最小相对贡献系数的储层确定为贼层。
  8. 如权利要求5或6所述的油藏中贼层的识别装置，其特征在于，对于碳酸盐岩油藏，所述最小单储层单位厚度产量贡献值为50，所述最小相对贡献系数为2。
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