雅克拉白垩系凝析气藏剩余油研究

Residual oil in Yakela Cretaceous condensate gas reservoir

张绘 张奎

Zhang Hui Zhang Kui

中国石化西北油田分公司雅克拉采气厂, 新疆库车 842017

Yakela Gas Production Plant, SINOPEC Northwest Company, Kuqa, Xinjiang 842017, China

雅克拉白垩系凝析气藏属于深层高温高压边水凝析气藏,2005年投入开发至今已稳产10年,目前边水推进增速,气藏控水治水难度较大,产量下降明显,气藏稳产形势严峻。通过精细小层对比,结合剩余油饱和度测井资料,进行剩余油分布研究,提出存在4种类型的剩余油,即:顶部层间剩余油、底部层间剩余油、层内剩余油(上气层底部)和水淹(水锁)剩余油。这为后期开展剩余油挖潜工作奠定了基础。

Yakela Cretaceous condensate gas reservoir is a deep gas reservoir with high temperature, high pressure, and edge water. It has been keeping stable production for 10 years until now. Since the advance speed of edge water is increasing, the water control of gas reservoir is difficult and the production is declining apparently. The gas reservoir is hard to maintain a stable situation now. By carrying out a fine contrast of small layers, and integrating with the logging information of residual oil saturation, we studied residual oil distribution, and proposed four types of residual oil:interlayer residual oil in the Upper Cretaceous, interlayer residual oil in the Lower Cretaceous, intralayer residual oil (at the bottom of upper gas layer), and water-flooded residual oil. It laid a foundation for residual oil development in the future.

https://doi.org/10.11781/sysydz2015S1051