The Study On Pattern Of Well During Development And Evaluation?Requirein Chang 49-1 District Chao Yanggou Oil Field

Chaoyanggou oil field is the reservoir composite structures,lithology and fault fact ors control the ultra-low permeability reservoir properties and physical properties of cr ude oil,oil and gas and water distribution and the degree of fracture development hav e great difference in different oil fields.In the course of exploration and development in recent decades,different blocks show different development status,but they have ente red the high water cut stage,the oil and water distribution is scattered,the remaining oi l is more difficult to tap.Stable production is the basic demand of oil field developme nt and exploitation,so it is very important to understand the low permeability and ultr a-low permeability reservoir.The sand bodies of the peripheral oilfields in Daqing are small in scale and intensive in fault,and the distribution of oil and water is complicat ed.In the aspect of machine rationality,there is no perfect theory to support the develo pment and exploitation of ultra-low permeability oil field.How to design and optimize the well pattern encryption scheme in the considerable economic benefits and improv e the recovery rate of low permeability and ultra-low permeability oil reservoirs.The study area is the development of low permeability reservoir in Daqing oilfiel d the first,through the study of the geological characteristics,dynamic block capacity c omprehensive understanding,close to the North has been utilized to block development effect,advanced water injection technology and the mature of horizontal well develop ment plan,a comprehensive analysis of the development potential of the remaining oil research area is big.According to the structure,deposition and combination of well and seismic prediction of sand body and other fine geologic research results as a guide,c ombined with the exploration and appraisal wells oil test results and the dynamic cap acity of adjacent zone,and the development of horizontal well technology to lead the development of well deployment area.The following conclusions and understanding:No.1.To survey the geological characteristics and reservoir based on previous sedi mentary facies and seismic well joint technology,fine structural interpretation guided b y the results of Chang 49-1 district,the joint oil test results,has been the development of peripheral zone,dynamic capacity has been utilized well area development,advanced water injection should be used to model research of reservoir engineering the design of a number of comprehensive,the study shows that the deployment scheme design an d high practicability.No.2.The average effective thickness of single well in Chang 49-1 block in Fuyu is 4.1m,the oil production intensity is 0.37t/d.m,stable oil production is 1.4 tons per day,and the production rate of horizontal wells in Fuyu oil reservoir is predicted to b e the minimum of 4.2 tons and a maximum of 7 tons per day.No.3.The dynamic analysis of the joint stress,artificial fracture and the surroundin g block,it is considered that the orientation of the horizontal well section in the direct ion perpendicular to the principal stress direction is 15 degrees north to west.No.4.With the combination of well and seismic structural interpretation method of budget sandstone thickness as the base,according to the level of wells in the deploy ment of the principle of channel sand layer FI2 main reservoir better for the preferre d region,the level of preparation of 5 wells,11 wells.No.5.Chang 49-1 district deployment design 33 wells,7 wells,26 wells(15 wells,11 wells),vertical and horizontal wells combined with early stage of development of oil production of single well by 7 tons per day,1.4 tons per day to calculate success dri lling rate to 0.96,the production rate of 300 D.The calculation work area can be built production capacity of 201 thousand and 600 tons.No.6.With reference to the economic evaluation criteria,when the oil price was $80 a barrel,the internal rate of return of 21.57%,the financial net present value of $23 million 765 thousand and 400.Fuyu million tons of oil production capacity constructio n investment scale of 6 billion 113 million yuan,considerable economic benefits.