泡沫酸化解堵技术在东河1-10H井的应用
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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 CⅢin Well Donghe 1-10H 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.
The sandstone reservoir CⅢin Well Donghe 1-10H 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.
引文
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[3]李小刚,陈雨松,邓庄,等.碳酸盐岩基质酸化中酸蚀蚓孔模拟回顾与展望[J].新疆石油地质,2017,38(4):492-497.LI Xiaogang,CHEN Yusong,DENG Zhuang,et al.Review and prospect of acid wormhole modeling during matrix acidizing in carbonate reservoirs[J].Xinjiang Petroleum Geology,2017,38(4):492-497.
[4]沈建新,刘雄飞,单全生,等.新型分流转向酸化工艺在塔里木油田DH1-H2井的应用[J].油气井测试,2011,20(5):40-42.SHEN Jianxin,LIU Xiongfei,SHAN Quansheng,et al.The application of new diverted acidizing technology in Tarim oilfield DH1-H2well[J].Well Testing,2011,20(5):40-42.
[5]李兆敏,李松岩,林日亿,等.氮气泡沫酸化技术在华港104-P2井的应用[J].钻井液与完井液,2009,26(4):46-48.LI Zhaomin,LI Songyan,LIN Riyi,et al.The application of nitrogen foam acid stimulation technology in well Huagang 104-P2[J].Drilling Fluid&Completion Fluid,2009,26(4):46-48.
[6]王翔,陈晓宇,管英柱,等.泡沫酸酸化工艺及其在中高含水油井中的应用[J].当代化工,2016,45(9):2 195-2 197.WANG Xiang,CHEN Xiaoyu,GUAN Yingzhu,et al.Foamed acid acidizing process and its application in medium-high water cut oil wells[J].Contemporary Chemical Industry,2016,45(9):2 195-2 197.
[7]官峻,陶剑清,王华,等.中高含水油井泡沫酸化工艺应用[J].油气藏评价与开发,2013,3(3):46-49.GUAN Jun,TAO Jianqing,WANG Hua,et al.Application of foam acidizing technology for medium-high water cut oil wells[J].Reservoir Evaluation and Development,2013,3(3):46-49.
[8]闫永萍,马兵,杨晓刚,等.姬塬长8油藏泡沫酸酸化技术研究及应用[J].科学技术与工程,2014,14(9):175-178.YAN Yongping,MA Bing,YANG Xiaogang,et al.Research and application of foamed acid acidation for Jiyuan Chang8 position[J].Science Technology and Engineering,2014,14(9):175-178.
[9]裴颖杰,夏海帮,荣双,等.红庄油田水平井泡沫酸化技术应用研究[J].油气藏评价与开发,2011,1(5):47-49.PEI Yingjie,XIA Haibang,RONG Shuang,et al.Research and application of foam acidification technique for horizontal wells in Hongzhuang oilfield[J].Reservoir Evaluation and Development,2011,1(5):47-49.
[10]郑力军,杨志伟,杜周,等.氮气泡沫酸化技术在虎狼峁油田解堵中的应用[J].钻井液与完井液,2011,28(3):72-74.ZHENG Lijun,YANG Zhiwei,DU Zhou,et al.Study on nitrogen gas foamed acid in broken down progress of Hulangmao oil field[J].Drilling Fluid&Completion Fluid,2011,28(3):72-74.
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