56
油气目化学
石油与天然气化工
CHEMICAL ENGINEERING OF OIL &GAS
2017
一种气井井筒用新型中性清防垢剂的
研究与应用
蒋文学1.-2万向辉1-2金娜1.2
1.中国石油川庆钻探工程有限公司钻采工程技术研究院
2.低渗遗油气田勘探开发国家工程实验室
摘要针对苏里格下古气田因出水引起井简缓慢堵塞，导致部分井产量下降的间题，开展了堵塞原因分析。为了减少入并液对管柱的腐蚀、延缓检修周期，开发出一种中性清防垢剂。产品室内评价结果表明：该产品16h对堵塞物溶解率可达到95%以上，对管柱腐蚀极低；质量浓度为40mg/L时，对不同种类无机垢的阻垢率达到80%以上，可延缓井筒结垢周期。产品现场应用3井次，解除了并筒堵塞，平均单并日产气量提高了213.3%。
关键调苏里格井简中性解堵清防垢剂
中图分类号：TE358+.5
文献标志码：A
D0I;10.3969/j.issn.1007-3426.2017.03.012
Study and application of a novel neutral scale
removing/inhibitingagentforgaswell Jiang Wenxue'-, Wan Xianghui', Jin Na'-
1. CCDC Drilling & Production Research Institute, Xi'an, Shaanzi, China, 2. National Engineering Laboratory of Lou-Permeability Oil & Gas Fields Erploration and Deulopment, Xi'an, Shaanzi, China
Abstract; Aiming at the problem that wellbore blockage slowly induced by water production in the gas field of lower palaeozoic in Sulige, and the decrease of production in some wells caused by this, the reasons of wellbore blockage were analyzed. Through the analysis of the blocking components by the instruments in laboratory, a neutral scale removing/inhibiting agent was developed to reduce well tubular corrosion caused by fluids and to extend maintenance cycle,The indoor evaluation experiments show that the dissolution rate of plug of the agent can reach 95% in 16 hours, while the corrosion rate is very low. The inhibition rate can achieve 8o% or above for different types of inorganic scale when the dosage is 4o mg/L, and then the wellbore scaling cycle can be delayed. The product was applied to 3 wells, and the wellbore blockage was removed with daily gas production of average single well improving 213. 3%. The application of this technology meets the need of late stage exploitation of gas field with safety,speed, and efficiency.The trend of cost efficiency development of gas field also provide guidance for the advancement of competing technologies.
Key words: Sulige, wellbore, neutral, blockage removal, scale removing/inhibiting agent
项目基金：中国石油集团公司统筹项目"拖动压裂与底水油气藏堵水压裂工艺技术研究与应用"（2014T-003-009)；中国石油川庆钻探工程有限公司科技攻关项目“长庆油田中性环保解堵技术"(CQ2017B-26-4-4)。
作者筒介：蒋文学(1985一)，工程师，毕业于长江大学应用化学专业，现就职于中国石油川庆钻探钻采工程技术研究院，从事压
裂酸化液、油田化学品配方研究工作，E-mail：wenxue_jcnpc，com.cn 万方数据