蘇里格氣田陜186井區(qū)致密砂巖氣儲層描述
[Abstract]:In order to improve the success rate of "sweet spot" drilling in tight sandstone gas reservoirs and effectively guide the design of horizontal wells, the Shan 186 well area of Sulige gas field is taken as the study area, and the high precision of the study area is utilized. Three-dimensional seismic data and drilling and logging data are used to explore effective methods for reservoir prediction of the upper Paleozoic Shihezi Formation from He8 member to Shan1 member of Shanxi Formation in the main gas-bearing intervals. Firstly, the basic seismic structure interpretation is carried out to understand the distribution of regional small-amplitude structures, and the spectral decomposition is used to predict the distribution of thick sand belts qualitatively. On this basis, the target formation is analyzed, and the reservoir is quantitatively described by the combination of geological statistical inversion and Poisson's ratio inversion. Four sets of small sand layers in He8 member of Shihezi Formation of Upper Paleozoic are delicately depicted by using Monto-Carlo algorithm, and the vertical prediction accuracy can reach below 10m. The elastic parameter inversion is used to predict the reservoir and effective reservoir of the target interval, and the brittle inversion is carried out creatively to predict the brittle distribution characteristics of the reservoir. Combined evaluation, the effective reservoir thickness, physical properties and gas-bearing spatial distribution in the study area are described, and 153.79 km 2 of type I+II favorable area in the study area is evaluated comprehensively. The fine description technology of tight gas reservoir is formed, which provides technical support for horizontal well development of tight sandstone gas reservoir in Sulige gas field.
【學位授予單位】:西安石油大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:P618.13
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