关键词: 二三结合开发模式, 配产配注, 正交设计, 数值模拟

Abstract: Under the background that the onshore oil fields have generally entered the stage of high water cut, it is imperative that the main oil layer gradually transit from class Ⅰ reservoirs to class Ⅱ and Ⅲ. On the basis of the existing technology, how to allocate production and injection rationally for water flooding and chemical flooding under the mode of "two⁃three combination" has become the focus of the "two⁃three combination" optimization technology. Combined with the actual physical parameters of the fault zone in the north district, the orthogonal design was designed for the water flooding and chemical flooding in the two⁃three combined mode, and the numerical simulation and multiple regression analysis of the single⁃well daily blending amount were carried out. The reasonable water injection formula for each layer of the second and third types of oil wells was determined. The production method of the wells in each single well was calculated by using the production method of well group injection and production balance and formation coefficient. The simulation results show that the recovery rate of water flooding after production and distribution is 2.52% higher than that of the actual scheme; the results of chemical flooding production and distribution are compared with the effects of chemical flooding development using the current water flooding injection parameters. The rate is 3.54% higher.

Key words: Second tertiary development mode, Production and injection rate, Orthogonal design, Numerical simulation