摘要
大庆长垣在20世纪80年代以前伴生气中基本不含H2S,90年代以后发现油田伴生气中含有H2S,到2002年H2S含量已超过200 m g/m3(总外输),腐蚀油气管道的现象时有发生。对取自大庆长垣的8个样品(H2S气体和FeS粉末)进行了硫同位素分析,结果显示3δ4S值在+12.73‰^+16.10‰之间,认为H2S成因与生物作用关系不大,其很可能是松辽盆地基底石炭—二叠系中硫酸盐热化学还原作用(TSR)所生成。
There was no H2S in the associated gas of Daqing placanticline before the 80s of last century. By the middle of 90s, the content of H2S in the associated gas was detected. At the year of 2002, the content of H2S reached 200 mg/m^3 and many oil pipes were eroded. By analyzing the 8 samples （H2S gas and FeS powder） collected from Daqing placanticline, the values of δ^34S of 8 samples vary at the range of ＋12.73‰-＋16.10‰. The isotope feature of this H2S is quite different compare with the H2S which generated by bacterial sulfate reduction （BSR） in other oilfield. The H2S maybe associate with the Thermochemical Sulfate Reduction（TSR） in the rock of Permo-Carboniferous in the basement of Songliao basin.
出处
《天然气地球科学》
EI
CAS
CSCD
2006年第1期51-54,共4页
Natural Gas Geoscience
基金
国家油气专项"大庆探区外围中新生代断陷盆地群演化与油气远景"(编号:XQ-2004-07)资助
关键词
大庆长垣
伴生气
硫化氢
硫同位素
成因
Daqing placanticline
Associated gas
Sulfureted Hydrogen
Sulfur Isotope
Origin.
