Study On Technical Countermeasures For Development And Adjustment Of K95 Fault Block In M Oilfield

K95 fault block is the main oil and gas production reservoir in the southern region of Huabei Oilfield.After reaching the peak production stage,it gradually enters the high water cut development stage,and the injection well water injection is difficult and the stable production situation is very severe.In view of the outstanding problems exposed during reservoir development,this paper analyzes the characteristics of geological reservoir,fluid property,development process and present situation of the fault block.This paper evaluates the reservoir characteristics,the X-ray diffraction analysis,reservoir sensitivity evaluation and seepage characteristics evaluation of indoor experiment and research work of reservoir rock and clay mineral X-diffraction experiment analysis of 7 samples;15 samples from the reservoir sensitivity evaluation(3 samples,3 pieces of acid sensitivity samples of 3 samples of water sensitivity,velocity sensitivity,alkali sensitivity and 3 samples of 3 samples of salt sensitive experiment);reservoir percolation characteristics evaluation(7 samples phase permeability experiment,9 samples of water flooding experiment).The reservoir is low porosity and low permeability reservoir,which has strong heterogeneity and is more serious.The reservoir showed strong water sensitivity to strong water sensitivity,strong salt sensitivity to strong salt sensitivity,moderate acid sensitivity and acid sensitivity,medium strong alkali sensitivity to alkali sensitive characteristics,no velocity sensitivity.The experimental data of phase permeability show that the oil phase permeability decreases rapidly with the increase of water saturation,and the two-phase percolation zone is narrower and the residual oil saturation is relatively high.On the basis of the above research,the adaptability of injection production system is studied,including the reasonable injection production ratio,injection production ratio,reasonable well spacing,reasonable pressure level and water flooding development effect evaluation research.In the early stage of reservoir development,injection production well pattern can meet the needs of reservoir development,and most wells have good water injection effect.Measures,effects and adaptability are evaluated,including fracturing,acidizing,plugging,plugging,water injection and other measures,including the analysis of the adaptability of oil wells and wells.The evaluation of remaining oil potential was carried out.Through fine structural interpretation and stratigraphic correlation,it has changed with the original structure.There is no well control area between the K95 main fault block and the K95-2x well and the K95-4x well,which has the potential of further drilling.K95 complex fault block structures,after years of mining,underground oil and water relations are more complex,less oil reserve,adjustment is difficult,the current oil field in the middle late stage of development,should increase the intensity of reservoir dynamic monitoring,a more detailed understanding of the geology,in order to ensure the efficient production of oil field.Through the evaluation of reservoir characteristics,study the influence of reservoir rock mineral water and acid sensitivity to the development,effect and adaptability of adaptability laws and safeguard measures to explore the injection production system,combined with the remaining oil potential to find the reasonable adjustment scheme,through the relevant results in practice.To improve the development of the reservoir,the slow decline the effect,guide the oilfield production effectively,and is stable and the same type of reservoir slow decline development provides a reference.