Reservoir heterogeneity characterization method under regular development well pattern of horizontal wells

Abstract

The invention discloses a reservoir heterogeneity characterization method under a regular development well pattern of horizontal wells. The method mainly comprises steps as follows: establishing a research area construction model to construct a target stratum model; (2) performing simulation to obtain a lithological model based on the stratum model established in Step (2); establishing a reservoir permeability 3D model in sandstone in the lithological model established in Step (3); establishing a virtual vertical well at the wellhead of each horizontal well; extracting stratum hierarchical data and permeability curves of each virtual vertical well; calculating the permeability heterogeneity parameter of a target interval of each well by using vertical well permeability curves in actual drilling and the permeability curves of the virtual vertical wells obtained in Step (6); drawing permeability heterogeneity parameter plane contour line maps to represent heterogeneity characteristics of reservoirs. A more accurate method is provided for carrying out reservoir heterogeneity characterization for oil fields exploited with horizontal wells as the main means.

Description

technical field [0001] The invention belongs to the technical field of oil and gas development geology, and in particular relates to a reservoir heterogeneity characterization method under regular development well patterns of horizontal wells. Background technique [0002] Reservoir heterogeneity refers to the inhomogeneous change of basic properties such as reservoir lithology, physical properties, microscopic pore structure and oiliness in three-dimensional space. According to different classification schemes, there are many classification methods for reservoir heterogeneity. Pettijohn et al. (1973) studied the heterogeneity of fluvial facies reservoirs, and divided them into levels according to the scale of heterogeneity, and divided them into stratigraphic scale, sand body scale, bedding system scale, Reservoir heterogeneity at the physical and pore scales. According to this idea, in 1986, Weber divided reservoir heterogeneity from the perspective of the scale of reser...

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Problems solved by technology

[0005] However, with the deepening of reservoir development, the development of horizontal wells has gradually increased. Compared with vertical wells, horizontal wells have the continuity of lateral information, but cannot reflect the vertical changes of formations. The existing reservoir heterogeneity characterization Parameters and methods are not suitable for horizontal well-based research, and new solutions are urgently needed

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