摘要
HD油田是鄂尔多斯盆地西部发现的优质高产油藏,开发中暴露出油井高产、水井高压的生产特征。分析引起高压的原因有三个方面,一是黏土矿物中绿泥石和伊利石发育,导致储层具有水敏和酸敏;二是双孔隙系统加深了敏感性反应堵塞的强度和深度;三是注入介质的不配伍性,造成储层伤害的长期存在。对高压注水井开展酸化措施,短期内降压幅度较明显,但注水压力反弹,措施的持续性变弱,重复实施效果明显变差。从典型井分析看,储层伤害由近及远,逐步加深,而且受三种因素的影响,后期改造效果变差。
HD oilfield is a high quality and high yield reservoir discovered in western Ordos Basin,and the high pressure production characteristics of high yield wells and wells are exposed during development.There are three reasons for high pressure analysis.First,chlorite and illite develop in clay minerals,resulting in water and acid sensitive reservoirs.Second,the double-pore system deepens the intensity and depth of the sensitive reaction plugging.Third,the incompatibility of the injected medium leads to the long-term existence of reservoir damage.Acidizing measures for high pressure injection wells showed obvious pressure reduction in the short term,but the water injection pressure rebounded,the sustainability of the measures became weak,and the effect of repeated implementation became significantly worse.From the analysis of typical wells,the damage of reservoir gradually deepens from near to far,and the effect of late reconstruction becomes worse under the influence of three factors.
作者
刘军全
姚首强
杨哲恒
闵鑫林
LIU Junquan;YAO Shouqiang;YANG Zheheng;MIN Xinlin(Oil Production Plant 7 of PetroChina Changqing Oilfield Company,Xi'an Shaanxi 710200,China)
出处
《石油化工应用》
2025年第8期69-73,共5页
Petrochemical Industry Application
关键词
注入介质
黏土矿物
孔隙结构
措施方式
injection medium
clay mineral
pore structure
measure method
