The Analysis Of Development Performance And The Adjustment Of Development Scheme In Nuraly Oilfield

Nuraly oilfield belongs to kazakhstan coats bisoprolol dazhou Terenozek area,which 140 km away from downtown coats parlour of Kyzylorda.Nuraly oilfield is high heterogeneity sandstone reservoir with middle prosity and middle permeability.this thesis mainly studies the cretaceous M strata,which main layer is M-II-3.By the end of the October 2014,Recovery degree of M-II-3 layer in the oilfield is 14.80%,the remaining geological reserves is624.36×104t;Recovery degree of M-II-1 layer in the oilfield is 3.07%,the remaining geological reserves is 223.96×104t.At present,the oilfield of M strata has developped for more than 10 years from 2013.Because of strong anisotropism of reservoir property,big difference between layers,The current production environment compared with the first development has changed dramatically.this thesis has established a three-dimensional geological model of the M strata after making a detailed analysis of the reservoir characteristics,including the stratigraphic structure model,the porosity model,permeability model,ntg model and oil saturation model.Secondly,It finished the 37 wells in the layers production history matching using reservoir engineering and reservoir simulation methods,well fitting rate is 83.8%.Based on the numerical simulation modle and the production history,analysised the remaining oil distribution and enrichment regularity.We can acknowledge that for the main M-II-3 layer affecting factors of the renmaining oil are heterogeneity,reservoir properties,unreasonable injection patterns,injection parameters and perforation;for the M-II-1 layer affecting factors is imperfect injection-production well pattern and low well spacing densit.At last,we study and optimize the reasonable development adjustment scheme.