The Study Of Detailed Reservoir Description And Development Adjustment In Putaogou Oil Field

Based on the sedimentology,petroleum geology and reservoir engineering,using high resolution 3D Seismic Data,logging data on comprehensive geological research of putaogou oilfield,the fault distribution and combination of the relationship have been rediscovered.By using stochastic modeling method and the crosswell seismic technology,3D forecast model is set up to predict the distribution of reservoir parameters,and through the intuitive dynamic visual technology it explains the results.Geological model of QiKeTai formation is established,including the layer model,the hierarchical dimensions and numerical simulation model.Combining with previous research results and the comprehensive research,source direction is mainly to the southwest,the river size smaller gradually from bottom to top,hydrodynamic gradually weakened.As the base level rise,hydrodynamic upward,granularity and thin sand body thickness.Moreover,the reserve of the model is fitted,and the error is within 5%,which conforms to the requirements of the geology.Since water flood of Putaogou oilfield Portuguese 5?10 block area carried out in 2005,it has experienced periods of rapid build production,high-speed development,the rapid decline of three phase and the oil reservoir in high water cut low speed running state.And,it is realized that the current reservoir well pattern is perfect and the sand body connectivity rate is high,but the physical differences QiKeTai every production layer,since most of injection Wells casing deformation increases the invalid water injection and production Wells way of commingled production,led to the current reservoir profile using difference is more apparent.After the failure of water breakthrough water cut increase,it is difficult to adjust control.At the present stage has gradually implemented by separate injection way to improve the injection profile,but need to combine production monitoring and timely adjust production production horizon.History matching from the year 2003 to 2012 by numerical simulation was done for the numerical model.Based on matching dynamic performance,3 sets of adjustment scheme are proposed.Case three prediction effect is best,watercut of 90.4%,production 15 years corresponding recovery 25.95%;the case one prediction effect is poorer,the production of 15 years watercut 95.4%,the corresponding recovery 21.67%.Using case three for subsequent development can improve recovery 4.28%,corresponding produced 125900 tons of crude oil.Therefore recommended,in Portugal the subsequent three adjustment scheme is used in the development process of implementation.