| In recent years,with the exploration of chang7 in ordos basin,finding that chang7 reservior shows the large resource potential and development prospects.It is important to take series of strata of ordos basin.Researching that chang 7 reservoir belongs to the delta sedimentary system in the delta front deposition,belongs to the low or ultra-low permeability reservoir.This kind of "low quality" reservoir in which is fluid seepage law for non-darcy seepage.Having start-up pressure gradient.the decreasing rate is fast.leading to the great difficulties to economic and efficient mining.Aiming to low permeability reservoirs with start-up pressure gradient of fluid flow characteristics of non-darcy percolation.In the way of depletion development,Volume fracturing is to improve reservoir development effect of effective development mode to increase production.Aiming to the characteristics of capacity decreasing rate.we analysis the factor of capicity decreasing influence,Based on the Ann 83 reservior in chang7 district Wells as an example analysis of chang 7 dense reservoir horizontal well development dynamic which has important practical application value.On the basis of reservoir characteristics in an 83 district in chang 7 reservior,evaluate the reservoir comprehensive.Using reservoir engineering theory,linear regression theory and the model of the fracture parameters.Combined with Ann 83 well block field test data.Through the example analysis,For chang 7 reservoirs in cases of fracture of depletion development and well pattern parameters relationship analysis.Establishing parameters reasonable boundaries.This paper which is to improve the low permeability oil field and oil well production,economic and efficient development of low permeability reservoirs has good guidance meaning.For the rational development of low permeability oilfield in ordos basin oil region,improved reservoir scale has very important reference value and guiding significance... |
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