| M well-block in H oilfield is a low permeability reservoir,which developed mainly depend on the natural energy of the elastic displacement+dissolved gas drive,so the reservoir energy and well production are decreased rapidly and affecting the development of the area. After development of horizontal waterflooding, there are wells have achieved a good effect of increasing oil. In order to further improve the efficiency of the development of the reservoir, increase the economic benefit of oil field, this paper studied the comprehensive treatment technology for chang9 reservoir in M well-block.In this paper, on the basis of the existing data and the research of reservoir development present situation and development characteristics, first, the authors made an evaluation of the reservoir development effect. It mainly include the reserves, energy, ultimate drainage radius, recovery ratio,effect of water injection. Second,on the basis of the analysis of effect of reservoir development, the main reservoir development policies were studied.Puts forward the reasonable pattern well spacing,optimizes the parameters of the horizontal well water injection,puts forward the reasonable way of water injection,the reasonable wellhead pressure of water injection,the reasonable flowing pressure,the reasonable water injection rate,etc,calculates economic limit oil production and the ultimate recoverable reserves of a well, and calculates the elastic development reasonable production of a well and water injection development reasonable production of a well.Finally,fully considering the previous research results, this paper give a comprehensive adjustment scheme of M well-block in H oilfield, and analyze the potential. If the adjustment scheme is expected to implement to 2025,the cumulative water injection of 2.29 million square, the cumulative oil production of more than 244000 ton,the late stage of oil recovery reached 2.08%, compared with the program before, the program has greatly improved. |
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