Method and device for determining reservoir heterogeneity
A reservoir heterogeneity and heterogeneity technology, which is applied in earthwork drilling and production, wellbore/well components, etc., can solve the problem of disjointed reservoir development, inability to quantitatively characterize reservoir heterogeneity, and not being intuitive and accurate enough problems such as high efficiency reservoir, high convenience analysis and accurate results
Active Publication Date: 2022-03-29
PETROCHINA CO LTD
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[0005] However, methods based on geological origin and stratigraphy cannot quantitatively characterize reservoir heterogeneity, and the current methods based on mathematical methods to quantitatively characterize reservoir heterogeneity are not intuitive and accurate enough, and are often out of touch with actual reservoir development
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[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.
[0023] The inventors found that: the existing research on reservoir heterogeneity has the following deficiencies: (1) most of them are based on geological factors, which cannot quantitatively characterize heterogeneity, and are difficult to compare and evaluate reservoirs; (2) many applications of mathematical calculation methods to determine reservoir The scheme of reservoir heterogeneity cannot accurately indicate reservoir heterogeneity; (3) The scheme of applying mathematical method to quantitatively characterize heterogeneity considers all acquired data, does not grasp the main contradictio...
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The invention provides a method and device for determining reservoir heterogeneity, wherein the method includes: marking the positions of all samples on the reservoir map; drawing the data of the permeability of all samples according to the permeability of each sample Box-and-whisker plot; the data box-and-whisker plot is used to characterize the distribution range of permeability; the upper whisker of the data box-and-whisker plot is the maximum value of the permeability of all samples, and the lower whisker is the minimum value of the permeability of all samples; the data box-and-whisker plot It includes a rectangular box representing the concentrated distribution of permeability; the reservoir represented by each sample is associated with the data box and whisker plot, and the reservoir heterogeneity is determined according to the associated reservoir map and the data box and whisker plot. The above-mentioned technical scheme is a visual determination scheme of reservoir heterogeneity, which can intuitively and accurately reflect the heterogeneity of the reservoir, and can provide early warning of problems in oil and gas field development, and provide a basis for the division of oilfield development layers and the design of development schemes , which is conducive to the efficient development of oil reservoirs.
Description
technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a method and device for determining reservoir heterogeneity. Background technique [0002] Reservoir heterogeneity refers to the fact that oil and gas reservoirs have experienced comprehensive effects of deposition, diagenesis, and later tectonic processes in the long geological history, resulting in extremely uneven changes in the spatial distribution and various internal attributes of the reservoir. . [0003] At present, some scholars have studied the heterogeneity of Donghe sandstone in the east slope of Lunnan by using diagenetic lithofacies analysis method; Heterogeneity characteristics of reservoirs; some scholars take Fuyu oil layers in Chao 1-Chaoqi 3 block of Chaoyanggou Oilfield, Songliao Basin as an example, for high-resolution sequence stratigraphy, in the study of reservoir macro-heterogeneity Some scholars have studied the geostatistical met...
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IPC IPC(8): E21B49/00
CPCE21B49/00
Inventor 杨阳甘俊奇王俊文曾倩张原阎逸群张洋张萌
Owner PETROCHINA CO LTD