摘要
气顶油藏在开采过程中,由于原有的压力平衡被打破,所以储层内的气体会侵入油藏。气体侵入油藏后会严重影响油的渗流能力,油井的产油量急剧下降。目前屏障注水较多地应用在渤海气顶油藏的开发中,但是对注水方式研究的内容较少。基于B油田的特点建立机理模型,对气顶油藏屏障注水运移规律及作用机理进行分析。研究结果表明:早期注水可以有效地抑制油井气窜;周期性屏障注水既能利用气顶膨胀的能量,又能有效地利用屏障注水控制油井气窜,使得油井见气后生产油气比处于较低的水平,提高油井开发效果。
During the production of gas cap reservoir,due to the original pressure balance being broken,the gas in the rescrvoir will invade the reservoir.The gas invasion into the reservoir will seriously affect the scepage ability of oil,and the oil proruction will drop sharply.At present,barrier water injection is widely used in the development of gas cap reservoirs in Bohai Sea,but there is litle research on water injection method.Based on the characteristics of B oilfield,the mechanism model is established,and the barrier water injection migration law and mechanism of gas cap reservoir are analyzed.The results show that early water injection can effectively restrain gas channeling,and periodlic barrier water injection can not only make use of the energy of gas cap expansion,but also effectively use barrier water injection to control gas channeling in oil wells,which makes the oil-gas ratio at a low level,and improves the effect of oil-well development.The research results are of great significance to the guidance of barrier water injction in complex fault-block reservoirs.
作者
王雨
李扬
陈存良
吴晓慧
杨明
WANG Yu;LI Yang;CHEN Cunliang;WU Xiaohui;YANG Ming(Bohai Oilfield Research Institute,Tianjin Branch of CNOOC Ltd.,Tianjin 300459,China)
出处
《广东石油化工学院学报》
2020年第6期29-31,共3页
Journal of Guangdong University of Petrochemical Technology
基金
国家科技重大专项(2016ZX05058001)。
关键词
气顶油藏
注水时机
周期性屏障注水
gas cap reservoir
injection timing
periodic barrier injection
