不同形态硫化物对稠油热采硫化氢产生的贡献分析

Analysis on contribution of different forms of sulfides to hydrogen sulfide produced in the process of heavy oil thermal recovery

随着开发的不断进行,稠油热采过程中硫化氢的产生量不断增加,尤其是在蒸汽驱区块硫化氢的产生量呈现急剧增加的趋势,严重影响了稠油热采区块的安全生产。为了进一步明确稠油热采过程中硫化氢的产生原因,对稠油热采过程中的含水量、处理温度和处理时间等因素进行了分析。研究结果表明,目标稠油在含水量为20%,处理温度为260℃,处理时间为48 h的条件下,不同形态的硫化物能够最大程度地转化为硫化氢;硫醇硫和硫醚硫在稠油热采条件下对硫化氢的产生有贡献,噻吩硫在稠油热采条件下对硫化氢的产生无贡献。分析不同形态硫化物对稠油热采硫化氢产生的贡献,可为高含硫区块的开发及制定相应的防治措施提供技术支持。

With the exploitation of heavy oil reservoir,hydrogen sulfide released in the process of heavy oil thermal recov？ery continually increases. Especially in steam drive block,the discharge of hydrogen sulfide surges,detrimentally affectingthe safety production of the heavy oil thermal recovery block. In order to further understand the mechanism of the genera？tion of hydrogen sulfide in the process of heavy oil thermal recovery,factors such as the water content,the processing tem？perature and the processing time were tested. The results show that the transformation of different forms of sulfides to hydro？gen sulfide can be maximized under the conditions of 20% of water content,260 ℃ of processing temperature and 48 h ofprocessing time for the target heavy oil. In the process of heavy oil thermal recovery,mercaptan sulfur and thioether sulfurcontribute to the generation of hydrogen sulfide,while thiophenic sulfur has no contribution. Analysis on contribution of dif？ferent forms of sulfides to sulfide hydrogen produced in the thermal recovery of heavy oil can provide technical supports forthe corresponding prevention measures in the exploitation of high sulfur block.