关键词: 扶余油田, 油田二次开发, 浅层三维地震, 水平井, 宽短缝压裂, 常温集输, 热采技术

Abstract: Comprehensive development of Fuyu Oilfield was carried out in 1970.Two times of overall adjustments had been made from 1970 to 2000.The annual output of oil has maintained more than 10 million tons for many years.But in 2002,the annual output of oil was only 65×10⁴ t,and the recovery porcent was 25 %.The composite water cut was up to 89 percent.Aiming at the problems such as poor status,low zonal injection rate,unsuitable ground network and aging gathering and transportation system,the third comprehensive adjustment was made in Fuyu Oilfield.The secondary development system for the oilfield was developed,such as the reconstruction of geologic system and network structure of oil wells,rebuilding well pattern and ground process programs,application of the development technologies series and change of oilfield development method.For adapting the secondary development system in Fuyu Oilfield,ten types of matching technologies series were developed,including the three-dimensional seismic acquisition and processing technology in complex ground and shallow layers,study on the reservoir sedimentary micro-facies,research on quantification and natures of remaining oil,application of horizontal and directional well,optimization and implementation of cementing system,gathering and transportation at room temperature without heating,lifting facilities for shallow directional wells and horizontal wells,sand-carrying liquid with high sand ratio and short-wide crack fracturing,identification of flow channeling path and profile control,steam stimulation and thermal recovery technologies.After applying those technologies series in Fuyu Oilfield,the new petroleum geological reserves have been raised by more than 60 million tons,and the cumulative new capacity 95×10⁴t has been obtained.The annual output of crude oil increased from 60.9×10⁴t in 2003 to more than 100×10⁴t at present.Good economic and social benefits have been achieved.

Key words: Fuyu Oilfield, secondary development of oilfields, three-dimensional seismic in shallow layer, horizontal well, short-wide crack fracturing, gathering at room temperature, thermal recovery technology