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Abstract: It is very complicated for the relationship between water injection and injection-production through horizontal well in a naturally fractured buried-hills reservoir. On the basis of simplifying and hypothesizing for the flowing equations of the dual medium, the mathematical model for fluid flowing in a reservoir is obtained, and 7 similarity principles is proposed also. To aim at simulating the practical development effect, with the direction of the similarity principle, the triaxial fluid physical models were formed. With this model, the physical simulations, such as different well deployment patterns for the horizontal wells, various well distance, various difference between injection and production, were all carried out, the oil-sweeping mechanics for the horizontal wells were analyzed. Thus, the optimum well deployment patterns, well distance, differential pressure between injection and production were all Fig. out, so that the research achievement can provide a technical foundation for the production with water-injection within horizontal wells in a naturally fractured buried-hill reservoir. [Copyright &y& Elsevier]

Abstract: The optimum deployment of stereoscopically injecting and producing well pattern is a key to the buried hill reservoir''s development. in the given reservoir, the spacing allocation factor of injecting and producing well type, vertical correspondent relationship, flat orientation relationship, injecting and producing well spacing for the stereoscopically injecting and producing the well pattern between the vertical well-horizontal well, horizontal well-horizontal well is optimized. With numerical simulation and by optimizing the multi injecting and producing schemes, the optimized scheme of stereoscopically injection-production well pattern for the buried hill reservoir is confirmed. [Copyright &y& Elsevier]