Evaluation Of Foam Compound Flooding In Block Ming 15 And Detection Of Surfactant In Produced Fluid

Since 2006, Block Ming 15 of Zhongyuan Oilfield had started air foam flooding research and field test. The stratigraphic of Block Ming 15 has a high degree of mineralization and low efficiency of oil-water displacement, and it’s a reservoir of normal pressure and temperature and moderate permeability. Combined with the characteristics of the reservoir, in 2011, the reservoir started the foam-surfactant combined flooding. In this paper, it has researched the oil displacement mechanism of foam combined flooding, analyzed the geological features of Ming 15 block, and used the improvement of Ross-Miles foam test to select frother, and from the thermal sensitivity, salt sensitivity, oil sensitivity and other aspects for experimental screening on frother; from pressure, salinity, temperature, gas liquid ratio, pumping speed, etc to evaluate the resistance factor.Developed a suitable surfactant for Ming 15, and injection parameters,such as slug ratio, the dosage of the slug, alternating cycle, of foam flooding were optimized. By selecting several injection well group to develop a suitable surfactant ZY-M1505 of Ming 15 block, and injection parameters of foam flooding are optimized. Oil displacement effect of foam combined flooding comparison between indoor effect evaluation and the application effect evaluation. HPLC was used to detect surfactant content in the produced fluid, and we focus on wells such as Ming 412, Ming 485 and Ming 408 and at last we analyse the test results. In the process of analysis, it was combined with connectivity situation, geology, situation of construction and injection. This can determine the possibility of channeling phenomenon existence, and some technical support for subsequent plugging operations.