酸化优化设计在石西油田SH1026井的应用研究  

Research and Application of Acidizing Optimization Design at SH1026 well in Shixi Oilfield

作　　者：罗兆[1] 张天翔[1] 怡宝安[1] 吴丽蓉[2] 

机构地区：[1]中国石油新疆油田分公司采油工艺研究院,新疆克拉玛依834000 [2]中国石油新疆油田分公司井下作业公司,新疆克拉玛依834000

出　　处：《油田化学》2010年第3期250-254,共5页Oilfield Chemistry

摘　　要：本文针对石西油SH1026井的特殊现状和该井所属区块地质特征,优选出了适合SH1026井的酸化液配方。结合损害程度和损害半径对产能的影响及沉淀带对油井产能的影响,采用Ac idgude基质酸化设计系统优化出适合SH1026井的施工工艺和规模,并进行了现场应用。室内实验表明,90℃下该配方主体酸对1.60g/cm2的泥浆粉末2h的溶蚀率为71.18%,对石西1井岩心粉末2h的溶蚀率为59.86%,该酸化液防腐性能好、配方应用表明,酸化后SH1026井日产油量逐步上升,含水率逐步下降,日产油从酸化前1.5 t逐步上升到酸化后日产油34.46 t,含水率从酸化前82.67%逐步下降到酸化后26.35%。Aimed at the special situation and geological characteristics of SH1026 well in Shixi oilfield,the suitable formulation of the acidifying fluids with good corrosion resistance,compatibility,and low surface and interfacial tension,was optimized.The acidifying fluids consisted of the preflush（15%HCl＋2%NH4Cl＋2% corrosion resistant K3＋1% ferric ion stabilizer K22-01 ＋1% cleanup additive K22-03 ＋2% Butyl cellosolve）,the major reaction acids（12%HCl＋3%HF＋2% NH4Cl＋2% corrosion resistant K3＋1% ferric ion stabilizer K22-01 ＋1% cleanup additive K22-03 ＋2% Butyl cellosolve） and the after-pad（1% surfactant KW-1）.The Laboratory experiments showed that after treated with the major reaction acids for 2 hours at 90℃,corrosion rate of mud powder with density of 1.60 g/cm3 and core powder in shixi 1 well was 71.18% and 59.86%,respectively,which ensured the effective elimination of mud contamination and the suitable treatment of the core.In addition,in view of influences of damage degree,damage radius and precipitate zones on productivity,the techniques and scale were optimized by the Acid guide design system of matrix acidifying.After acidification,the effect was remarkable,daily oil production increased from 1.5 t to 34.46 t,and water content ratio decreased from 82.67% to 26.35%.

关 键 词：酸化液 低渗透油藏 优化设计 泥浆污染 

分 类 号：TE357.2[石油与天然气工程—油气田开发工程] TE39