New Calculation Method of Sweep Efficiency after Pattern Infilling in Low Permeability Reservoir

Abstract:

Sweep efficiency is a very important parameters for development effect evaluation and dynamic analysis of oilfield. For low permeability oilfield, well pattern thickening is one of the most effective means of improving development effectiveness. In this paper, a corrected calculation method is given and well spacing density is introduced as a parameter for the formula correction. The curve of volumetric sweep efficiency and well spacing density was achieved through the formula and statistical data. After the infill adjustment, increasing multiple of sweep efficiency can be calculated. Using the actual data of Changqing oilfield to calculate, result show that the deviation is 1.1% .

• Periodical: Advanced Materials Research (Volumes 1010-1012)
• Pages: 1713-1718
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1010-1012.1713
• Online since: August 2014
• Authors: Fang Zhao*, Rui Shen, Gang Xu
• Keywords: Heterogeneity, Low-Permeability Reservoir, Multivariate Nonlinear Regression, Sweep Efficiency, Well Pattern Thickening

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