关键词: 普通稠油, 水驱, 火驱可行性, 方案设计, 矿场实践, 蒙古林油田

Abstract: In response to the unclear adaptability of fireflood technology in the late stage of waterflood development of ordinary heavy oil reservoirs,the feasibility of fireflood technology in the late stage of waterflood development of ordinary heavy oil was studied by using a one-dimensional physical simulation device in combination with reservoir geological development parameters.The study shows that low-viscosity ordinary heavy oil has good crude oil properties and can be ignited at 280 ℃ under the condition of 75% water saturation.The oil bank advance is sustained,indicating the feasibility of implementing fire flooding technology.Numerical simulation methods were used to determine that the pilot test used an inverted seven-spot areal pattern with a well spacing of 150 m,and the optimal gas injection intensity was 2 000 m³/(d·m).The research results were applied to the fireflood field test of the Menggulin conglomerate oil reservoir.After ignition,the effect was obvious.The daily oil production increased from 16.7 t before implementation to 62.2 t,an increase of 272.5%,and the comprehensive water cut decreased from 90.3% to 59.7%.It fully indicates that fireflood technology can be used as a major technology to improve the recovery rate of ordinary heavy oil reservoirs in the late stage of waterflood development.This study result can provide a reference for the transformation of development methods for double-high ordinary heavy oil reservoirs.

Key words: ordinary heavy oil, conglomerate, fireflood feasibility, program design, mine practice, Menggulin Oilfield