H_2S对压裂酸化工作液伤害的实验研究  

EXPERIMENTAL STUDY ON POLLUTION OF FRACTURE ACIDIZING TREATMENT FLUID BY H_2S

作　　者：何启平[1] 彭建新[2] 欧治林 袁晓波[3] 张军[1] 叶长文[4] 

机构地区：[1]四川石油管理局井下作业公司 [2]塔里木油田分公司 [3]四川石油局钻采院 [4]四川石油局二勘公司

出　　处：《钻采工艺》2006年第6期111-113,共3页Drilling & Production Technology

摘　　要：针对碳酸盐岩储层中H2S对压裂酸化工作液的伤害问题进行了实验研究。实验表明，在有铁存在的情况下，H2S可以加大酸液对钢片的电化学腐蚀；铁离子稳定剂的稳铁能力急剧下降，在乏酸（pH值4～6）中生成大量的沉淀，对储层产生伤害；H2S对其它添加剂的性能没有明显影响。文中从机理方面分析了H2S可以加大酸液对钢片的电化学腐蚀和使铁离子稳定剂失效的原因；通过结合实例对地层岩石的矿物成分分析后认为：在对含H2S储层的酸压改造过程中，应根据地层岩石的矿物成分，合理调配液体性能，选择适当的施工工艺可以避免产生硫化物沉淀，减少对地层的伤害。根据酸压工艺流程，地层中的H2S一般不会对地面管线或设备造成伤害。The paper studied the pollution problem of H2S to acidizing treatment fluid in carbonatite reservoir. Experiment results show that H2S can quicken electro-chemical corrosion of billet when ferric ion exist in acidizing treatment fluid, stabilizing power of ferric ion stabilizer agent reduce rapidly, and H2S don't affect the performance of other additives. The paper analyzed the reasons that H2S quicken electro-chemical corrosion of billet and make ferric ion stabilizer agent failure. Through analyzing the mineral composition of formation rock, author thought the performance of fracture acidizing treatment fluid should be prepared based on the mineral composition of formation rock, and selecting adequate operation technology can avoid the deposition of sulfide and reduce the formation damage. On the basis of acid fracturing process flow, H2S in stratum will not damage surface pipeline or equipment.

关 键 词：H2S 压裂酸化 地层伤害 实验研究 

分 类 号：TE357.2[石油与天然气工程—油气田开发工程]