碳酸盐岩缝洞型油藏产水机理及控水措施研究

塔河油田4区奥陶系油藏是典型的复杂碳酸盐岩油藏。油藏开发进入高含水之后，油井产液量急剧降低，油井出水问题已经成为该油田开发的突出问题，严重制约着油田采收率。以塔河油田4区主力缝洞单元S65与S48为研究对象，在归纳出缓慢出水型、突发上升型、间歇出水型等3种产水类型油井基础上，利用地震、钻井、测井等资料，结合生产动态特征进一步分析3种类型油井的产水机理。据此提出合理、有效的控水措施：缓慢出水型油井在单元低部位注水保持能量；突发上升型油井应考虑堵水、上返高部位侧钻；间歇出水型油井考虑关井压锥，堵水控制水窜范围和规模。措施效果明显，可指导该类油藏高效开发。

THE EXPERIMENTAL STUDY ON THE THIOBACILLUS DESULFURIZATION APPLIED TO REMOVING HYDROGEN SULFIDE

In this paper，such factors as concentration of sodium carbonate solution，pH value，temperature，intake rate，spray amount，residence time and thiobacillus desulfurization in the washing solution influencing on the desulfurization rate are inspected by single factor analysis，and initially defined the optimal conditions for the natural gas containing H₂S（concentration≤1300mg/m³） are as following，pH value is 8~9，temperature 25℃~35℃，initial concentration of the sodium carbonate solution 5%，residence time 90s.The experimental results also indicate that the spray amount and the intake rate influences the desulfurization rate，the regenerative lye which enters absorption tower carries thiobacillus desulfurization，which can help to improve desulfurization rate.