Since The Raw Foam Profile Control Technology Research And Application

The main areas of Chinese oil fields have entered into development period of high water cut and nature regression rate. Because of function mechanism's restriction, effect of water controlling and stabilizing oil production technique of profile control and water blockg becomes gradually bad. The ton oil cost rises continuously. It is hard to make larger function in improving recovery ratio in area of high water cut. It is main problem in every oilfield how to improve further water drive efficiency and ultimately recovery ratio.Now contaminative mud has great capacity after technologic process of water handling. This is concerned problem in current oil field how to make use of contaminative mud after water handling. Contaminative mud after water handling could be made use of to respond with hydrochloric acid to produce carbon dioxide air. Contaminative mud's main component is sodium carbonate. Carbon dioxid(?) air becomes carbon dioxide foam under surface active substance. The technique pro(?)ies a new way of thinking for development of profile control techniques.According to component analysis of contaminative mud after water han(?)ng, mechanism research of contaminative mud responding with hydrochloric(?) id, formulation research of self-generating foam system and physical simul(?)on experiment of adjusting section, this paper investigates reactive condition, m(?)ng regulation and function of adjusting section of self-generating foam system in oi(?)ol. The indoors research has this result. Sodium carbonate, contaminative mud's (?)n component, can produce the carbon dioxide responding with hydrochloric acid. I(?) form foam under surface active substance. The gel can enhance the stability o(?)e foam. Foam of self-generating foam—gel system has small and even dian(?)r. Blocking intensity of self-generating foam—gel system in sand packer is better(?)n self-generating foam system. But blocking intensity will decline the condition of(?)The well-site experiments have this result. The profile control techniq(?)of self-generating foam is a new environmental protection technique of low devotio(?)d high output. The technique not only solves disposing problem of contaminative(?)d after water handling, but also lowers cost of deep diversion. The profile c(?)ol technique of self-generating foam improves water affecting coefficient ith controlling absorbing water in strong absorbing water layer. That technique prov(?)s a valid way to develop the reservoirs with serious heterogenieous, high temperatu(?)d high salinity, and high water cut reservoirs.