Research On Second Tertiary Combined Test Region Of Daqing Oilfield

Daqing oilfield has entered the development stage of extra high water cut.majority mainlayers have been developed by polymer and some have accessed end.the tertiary development that focus sub-mainlayers became the important method of guaranteeing oilfield steady production.Basing on the testfields of Lamadian oilfield and Sazhong oilfield,author contrasted and analysed the structure,reservoir liquid,sand, sediment pattern and remaining oil, summarized character of sub-mainlayer geology and exploitation potential,confirm aim layer,well distance,method well spacing.After new well put into production,author analysed the change of production index and summarized the effect of second tertiary combin in keeping oilfield steady production,preventing decline of production and rise of water cut.author made fine model and simulation in Lamadian test region for deeply evaluating development effection deeply catching reservoir state and predicting the data of development.author made geologic model through several data system and face controlling technic and made simulate model through production data layer shut data perforation data and acidulation data.base on de work of matching of reserve and history,author analysed the oil recovery in every layer, predicted and compared several plans,confirmed the effect of waterflood in second tertiary combined and offer technic support for next step.