Reservoir heterogeneity determining method and device
A technology of reservoir heterogeneity and determination method, which is applied in the fields of earth-moving drilling, wellbore/well components, etc., can solve the problems of insufficient intuitiveness and accuracy, inability to quantitatively characterize reservoir heterogeneity, and disconnection of reservoir development. , to achieve the effect of accurate results, highly convenient analysis, and efficient reservoirs
Active Publication Date: 2019-01-01
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 reservoir heterogeneity determining method and device. The reservoir heterogeneity determining method comprises the steps of marking positions of all samples on a reservoir figure; drawing a data box-and-whisker plot of penetration rates of all samples according to the penetration rate of each sample, wherein the data box-and-whisker plot is used for representing a distribution range of the penetration rates, an upper whisker of the data box-and-whisker plot is a maximum value in the penetration rates of all samples, a lower whisker of the data box-and-whisker plot isa minimum value in the penetration rates of all samples, and the data box-and-whisker plot comprises a rectangular box representing penetration rate concentrated distribution; enabling a reservoir represented by each sample to be associated with the data box-and-whisker plot; and determining reservoir heterogeneity according to the reservoir figure and the data box-and-whisker plot which are associated. The reservoir heterogeneity determining method is a reservoir heterogeneity visual determining scheme, the heterogeneity of the reservoir can be visually and accurately reflected, possible problems of oil and gas field development can be pre-warned, a basis is provided for oilfield development layer series division and development scheme design, and the reservoir heterogeneity determining method is beneficial for efficient oil reservoir development.
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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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