The Fine Description Of Chang 6 Within Group 294 In Nanniwan Oilfield

The fine description of the reservoir research of stratigraphic division and contrast,sedimentary microfacies,development effect evaluation and so on.The purpose is to further improve the understanding of injection wells and oil wells layer connectivity and injection production relationship,effectively carry out the operation of perforation,filling,acid fracturing to ensure the effectiveness of water injection development,improve the main oil recovery,and then achieve long-term stable and high yield.The reservoir of Chang 6 within Group 294 in Nanniwan oilfield belongs to low permeability reservoir,At present,there are many problems,such as lack of natural energy,low productivity of production wells,fast decline,stable production,complex connectivity of sand body,imperfect injection well network,poor correspondence of injection and production and so on.According to the development of water injection,the area can be divided into Ping 15 and Zhao 12 two water injection area,and the water injection effect is very different.In this paper,the geologic research work of stratigraphic fine division and contrast,sedimentary microfacies and evaluation of development effect is carried out for the existing problems of the reservoir of Chang 6 within Group 294 in Nanniwan oilfield.Based on the deep understanding of the reservoir characteristics of the area,the evaluation of water injection effect,the evaluation of injection and production well pattern and the corresponding relationship between injection and production in well group are carried out,and the comprehensive adjustment and development plan are made on the basis of new understanding of geological understanding and development regularity.And make a further effect prediction on the adjustment plan,and provide the direction for the future development of the area,and provide the geological basis for the implementation of the old well reconstruction,tapping the potential measures and carrying out the water injection work in a comprehensive and systematic manner.