The Relationship Between Topography and Distribution of Slope in T23 Top Surface of Gaoyou Sag

doi:10.11885/j.issn.1674-5086.2020.05.22.02

Abstract

Abstract: At present, the main GIS technique for geological structure analysis in oil field is three-dimensional modeling, but few methods of slope analysis for geological structure analysis. Two slope statistical indexes are extracted by means of mean variable point analysis and area elevation integral:Hypsometric Integral (HI) and depth range. The 17×17 (pixel) window is used to make statistics and mapping, and the relationship between spatial distribution and topography is analyzed. The results of research show that the depth variation amplitude of T₂³ top surface increases gradually from the northwest to the southeast. The biggest value of depth variation is 700 m in the northwest and 2 198 m in the southeast, which indicates the topography of T₂³ top surface in southeast is more complex than that in northwest. The mean of HI is 0.5, indicating the top surface of T₂³ top surface is in the prime of the development of groundwater erosion topography. The spatial distribution of HI indicates the southeast with larger depth and more complex terrain is basically in the aging stage of erosion terrain development. The transitional zone of depth and terrain complexity from high to low is in the prime. Areas of less depth are in their infancy and are characterized by strong drainage branching.

Key words: distribution of slope, geography, depth range, hypsometric integral, Gaoyou Sag

CLC Number:

TE122

TANG Jun, DUAN Yuying, DUAN Hongliang, LIU Dan, ZHU Fengfan. The Relationship Between Topography and Distribution of Slope in T₂³ Top Surface of Gaoyou Sag[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2020, 42(6): 26-34.

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The Relationship Between Topography and Distribution of Slope in T₂³ Top Surface of Gaoyou Sag

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