论文部分内容阅读
南八仙复杂断块油气田,其油气藏富集受构造、断层、岩性等多重因素的控制。深层E13气藏为原生高压气藏,且以凝析气藏为主;中浅层N1—N22气藏为次生正常压力油气藏,油气藏类型复杂多样。参考近期区域勘探研究成果,试采开发动态资料,分析了南八仙“上油下气、以气为主”的成藏规律,认为E13气藏为2期充注,构造相对完整,圈闭保存条件好,形成异常高压原生气藏;E23原生油气藏受到后期仙北大断层的破坏,油气向浅层运移聚集;N1—N22油气藏为断层、岩性圈闭的产物,一期充注,属正常压力的次生油气藏,油气主要富集于圈闭条件较好的仙北大断层的下盘。
South Badaxi complex fault block oil and gas fields, the accumulation of oil and gas by the structure, fault, lithology and other multiple factors control. The deep E13 gas reservoir is a primary high pressure gas reservoir and is mainly composed of condensate gas reservoirs. The middle and shallow N1-N22 gas reservoirs are secondary normal pressure reservoirs, and the types of reservoirs are complex and diverse. According to the recent exploration results of the region, the development and development of dynamic data were tried and analyzed. The accumulation pattern of Nanbaxian oil-gas and gas-dominated gas was analyzed. It is considered that E13 gas reservoir is of 2-stage filling and the structure is relatively complete. The reservoir is well closed and well-preserved, resulting in the formation of abnormally high-pressure primary gas reservoirs. The E23 primary oil-gas reservoir is damaged by the late Xianbei Great Fault and hydrocarbons migrate to the shallow layers. The N1-N22 reservoir is the product of faults and lithologic traps. Note that the normal pressure of the secondary oil and gas reservoirs, oil and gas are mainly concentrated in the trapped conditions of Xianbei Great Fault under the plate.