摘要
安塞油田已进入注水开发中后期,由于长期生产及各种增产措施的影响,地层发生了一定程度的复合堵塞。生产时间较短的油井堵塞物以有机物为主,生产时间较长的油井堵塞物中有机物和无机物并存,水井以铁盐、亚铁盐和细菌以及由水敏、速敏造成的堵塞为主。针对安塞油田油、水井的不同堵塞物特征,分析了地层的堵塞机理和影响因素。根据地层堵塞机理和复合解堵酸液作用机理,通过室内实验,配制了适合安塞油田地层复合解堵的酸液。室内实验和现场应用表明:该酸液能够有效地解除地层中的复合堵塞物,达到增产增注的目的。
Ansai Oilfield is in the middle-late stage of waterflooding development and the reservoir is complexly plugged after long term production and kinds of stimulations. For the producers of short production history, the organic matters are the major blockage, and for the ones with longer production history, the blockage is composed of both organic and inorganic matters, and the blockage in the injectors is mainly caused by molisites, ferrites, bacterias, water sensitivity and velocity sensitivity. The plugging mechanism and influencing factors were studied according to the blockage features of the producers and injectors. Based on the plugging and blockage removing mechanism, the acid remover for the Ansai Oilfield is developed. The experiments and field applications prove that the acid remover can remove the formation blockage effectively and increase the oil production and water injection.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2005年第6期101-104,共4页
Petroleum Exploration and Development
基金
国家自然科学基金"自激波动注水与旋转射流解堵理论与试验研究"资助(59874017)
关键词
安塞油田
复合解堵
酸液配方
油井增产
Ansai Oiltield
complex blockage removal
acidformula
production enhancement
