Research On Well Pattern Optimization And Arrangement In Fang 17 Block Of Songfangtun Oil Field

Based upon the wells' geologic informations sufficiently collected in Fang 17 block of Songfangtun oil field and combined with the digitized precipitation facies, the structural model and property model with porosity, permeability, oil saturation and effective thickness is established by using the three-dimensional geological modeling software of Petrel in this thesis. The numerical simulation software of Eclipse is applied to match the development index in the period of waterflooding, including the geological reserves, composite water cut, individual well water cut, degree of reserve recovery, pressure and so on. On the basis of meeting the accurate history matching, the suitability of Fang 17 block is evaluated. according to the distribution of remaining oil situation,the reason of remaining oil is analysised. According to the geologic feature of Fang 17 block, The various well pattern adjustment plans of injection and encrypt method are made. Use the numerical simulation method, the effect of various development plans are forecasted. On the injection aspect, the adjustment plans of Five-spot water flooding pattern and line flooding are made. On the encrypt aspect, the adjustment plans of diagonal line encrypt method and oil well encrypt method are made. In accordance with the results of numerical simulation, the fruitage of various development plans is compared and analyzed, then the appropriate plan of adjustment is determined. Based on that research achievement, the affection of development index which well network adjustment made is analysed. Combine with economic evaluation, the boundary of well spacing of encrypt adjustment and thickness of oil layer are researched. The encrypt boundary of different oil price is determined.