The Study On Residual Oil Exploration Measures In Tai 105 Block

The research object of this article is Tai 105 block,which mainly developed thin and poor layer,the average single well drilling in 3.0m/4.0 layer effectively,average porosity is 18.9%,air permeability is 22.3×10^-3m².It is a low permeability reservoir with a large range of lithology and physical properties and strong heterogeneity in plane and longitudinal.With the extension of development time and encryption adjustment from2011 to 2014,Highlights gradually,various development problems such as inefficient invalid water well number ratio is high,the surface water flooding effect is not uniform,the thin and poor reservoir has a low degree of producing.In view of the above problems,the development policies and measures determined in the early stage of the development plan cannot fully adapt to the needs of oilfield development at the present stage.Therefore,in view of the current development status of Tai 105 block,according to the development history and data of the block,establishing the fine 3d geological model by using the well seismic joint technology and establishing attribute model by well seismic dual control,and the reservoir history fitting was carried out to ensure the accuracy of the model.Analysis the remaining oil distribution types on the macroscopic and microscopic in research zone,by introducing the theory of grey correlation and mathematical fuzzy discrimination to analyze the main control factors of residual oil and the distribution of remaining oil types in each layer,and it can predict the distribution of remaining oil quantitatively and guide oilfield development and production accurately by software.According to the residual oil distribution,determine the exploration measures and location,mining residual oil accurately.After in-depth study of the remaining oil distribution in the Tai 105 block,according to reasonable well spacing,streamline direction and sand condition in each well area,the optimal scheme of injection conversion is designed for the wells around horizontal wells.8 new wells are designed for each type of well pattern and determine 6 water blocking measures,14 hole repairing measures and 5 fracturing measures for the whole area.After the adjustment of the measures,the cumulative oil production is predicted to increase by2.52×10⁴t,and the crude oil recovery rate of the reservoir will increase by 2.69%.