辽河油田油井硫化氢产生机理与防治措施.pdfVIP

2008 6 PETROLEUM EXPLORATION AND DEVELOPMENT Vol.35 No. 3 349 : 1000-0747(2008) 03-0349-06 王潜 ( 辽河油田钻采工艺研究院) : 在辽河油田相关采油单位部分油井含硫化氢状况统计分析基 上,研究硫化氢的生成机理油井中产生硫化氢的主要原 因是:原油中硫醇硫醚等有机硫化物在高温下反应生成硫化氢;地层中含硫矿物在高温下反应生成硫化氢;地层水中硫酸盐还 原菌在油层条件下将硫酸盐还原成硫化氢针对洼38油田实际情况,研究油井硫化氢含量影响因素实验表明, 温度是产生硫 化氢的主要外在因素, 温度在100 e 以上时,每升高20 e ,硫化氢含量平均增加0.03%左右; 温度在160~ 180 e 时硫化氢含量增 加幅度最大; 温度高于180 e 后硫化氢含量增加幅度明显减小加入表面活性剂混合添加剂能够抑制硫化氢的释放,酸类化学 剂的加入会使硫化氢含量增加加入自行研制的硫化氢消除剂一段时间后可基本消除硫化氢图5 表9 参10 : 油井; 硫化氢; 机理; 防治; 辽河油田 :T E357.4 : A Generation mechanism and control measures for H2S in oil wells, Liaohe Oilfield WANG Qian (D rilling P r od uciton Tech nology R esearch I nst itute, P etroCh ina L iaohe Oilf ield Comp any , P anj in 124010, Ch ina ) Abstract: H S ay be generated by reactions of sulphur-alcohol and sulfoether in the crude oil or by the sulfur-bearing 2 inerals in the for ation at high te peratures. Sulphate can also be reduced to H S by the sulphate-reducing bacteria in 2 for ation water at for ation conditions. Experi ents show that te perature is the key external factor affecting the for ation of H S. T e perature being over 100 e , the content of H S increases by about 0.03% every 20 e increase in 2 2 te perature. T he content of H S increases rapidly with te perature being between 160 e and 180 e . When te perature 2 is higher than 180 e , the speed of H S generation decreases obviously. With surfactants and ixe