摘要
东河油田东河1-10H井东河砂岩CⅢ储集层物性差,含水率高,水平段长,压力系数低,在钻井和修井过程中存在储集层污染现象,采用常规酸化技术因酸液在储集层中分布不均匀、残酸返排不彻底等,导致油层酸化效果差。基于此,提出了泡沫酸化解堵技术,并进行了泡沫酸岩心分流实验。结果表明:泡沫酸起泡和稳泡性能良好,泡沫对水层有较强的封堵能力,对油层封堵能力较弱;高渗岩心与低渗岩心的分流量由注泡沫酸实验前的19.0倍降低到实验后的1.7倍。东河1-10H井现场应用泡沫酸化解堵技术取得明显增产效果,有效解除了东河1-10H井储集层污染,为油田水平井增产降水提供了技术支撑。
The sandstone reservoir CⅢ in Well Donghe1-10H of Donghe oilfield is characterized by poor physical property, high water cut, long horizontal section and low pressure coefficient. During drilling and workover operations, contamination occurred to the reservoir because of the uneven acid distribution and incomplete flowback of residual acid in the reservoir when applying conventional acidification, resulting in the poor acidizing effect in oil zones. Based on which, the paper proposed a foam acidizing method to remove plugging and performed core foam diversion acidizing experiments. The results show that the foaming ability and stability of the foam acid are pretty good and the foam can effectively plug the aquifer;the difference of the diversion flow rates in the high-permeability core and low-permeability core decrease from 19 times before foam acid injection to 1.7 times after the experiment. The actual field application of foam acidizing and plugging removal technology in the wellsite of Donghe 1-10H indicates a good stimulation effect. The technology can effectively solve the reservoir contamination in Well Donghe 1-10H and provides technical support for the oil production of horizontal well in the oilfield.
作者
谭良柏
昌伦杰
孙玉国
郑苗
程春杰
杨之照
TAN Liangbo;CHANG Lunjie;SUN Yuguo;ZHENG Miao;CHENG Chunjie;YANG Zhizhao(Development Department,Tarim Oilfield Company,PetroChina,Korla,Xinjiang 841000,China;Research Institute of Engineering Technology ,Xinjiang Oilfield Company,PetroChina,Karamay,Xinjiang 834000,China)
出处
《新疆石油地质》
CAS
CSCD
北大核心
2019年第3期376-378,共3页
Xinjiang Petroleum Geology
关键词
东河油田
水平井开采
钻井污染
修井污染
泡沫酸化解堵技术
酸化效果
Donghe oilfield
horizontal well production
workover contamination
foam acidification technology
acidizing effect
