Study on the Standard Boundary of Subdivision Water Injection in Extra High Water Cut Period

Abstract

In order to improve the overall utilization degree of oil reservoirs in the late stage of oilfield flooding development [1], reduce the difference of interlayer utilization [2], expand the water injection coefficient, and improve the potential of residual oil development efficiency [3]. We establish a comprehensive water injection well subdivision standard system based on the analysis of the factors affecting the oil layer utilization [4]. Through the application of dynamic monitoring data, the relationship between the stratification index and the utilization status of the injection well is established [5], and the main factors affecting the utilization degree of the oil layer are determined. For the original subdivision water injection standard, only the vertical index is considered, the comprehensive and scientific problems are lacked, and the planar evaluation index is introduced innovatively. According to the relationship between the planar index and the utilization degree, the subdivision standard of the water injection well is optimized. Daqing Oilfield uses a model based on different reservoir properties to develop well patterns [3]. The physical properties of the reservoirs in the wells are quite different, which further refine the layered water injection standards of each well’s network, making the stratification standards more scientific and reasonable, more targeted and practical. It meets the actual needs of precise development of oilfields with high water cut period and effectively improves the efficiency of oilfield development.

Copyright 2019, IFEDC Organizing Committee.

This paper was prepared for presentation at the 2019 International Field Exploration and Development Conference in Xi’an, China, 16–18 October, 2019.

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