Reservoir Characteristics And Evaluation Of Chang 2 Reservoir Advance Pilot Water Injection Experiments Effect Of Ji Yuan Oilfields In Ordos Basin

Ji Yuan oilfield is discovered new oilfield in the 2002, the district regional characteristics, sediment in character, reservoir characteristics and oil deposit characteristics have not studied . the papers very detailed study reservoir of the sediment characteristics, and rock features, pore types and characteristics, and material in nature, sensitivity characteristics and reservoir characteristics , fluid characteristics and seeps features on the basis of collection of geological data. This studied provide a reliable basis for large-scale development and provide the technical reserves for the next step development.In addition, Advance pilot water injection experiments is do in Geng 19 wells area, Through this experiment to find the best exploitation manner of the Ji Yuan oilfields and in accordance with the results of experiments to determine the reasonable development of technology policy. Comprehensive evaluate Chang 2 Reservoir Advance Pilot Water injection experiments results, Guiding oilfield reasonable and efficient oilfield development. The research according to Ji Yuan oilfield sheet information for the analysis , either observation and in conjunction with cast body sheet statistics, shows rock types of Chang 2 Reservoir of the Ji Yuan oilfields is main Yanxie-feldspar-stones, feldspar stones, feldspar Yanxie-stones. Contact form is the line-type, mainly pore-type cemented. The objects in rock are primarily kaolinite and iron-calcite and Lunidan, Followed by species. Pore types have grain-between-pore, feldspar-dissolved-pore, Yan Xie dissolved pore, crystal-between-pore and micro fissures. Grain-between-pore is the main hole, followed by feldspar-dissolved-pore, crystal-between-pore and Yan Xie- dissolved-pore. Reservoir sets space-based is mainly made up of grain-between-pore, feldspar-dissolved-pore . followed by crystal-between-pore and Yan Xie- dissolved-pore.According to Ji Yuan Chang 2 Reservoir of the Ji Yuan oilfields large regions of the objects of statistical analysis, Reservoir rock types overall characterized Medium pore degrees, the low penetration rate, the higher wet saturation, the low oil-bearing saturation.. According pore structure targets and reservoir rocks and features, such as sexual objects reservoir information that Ji Yuan region Chang 2 reservoir Group overall drop type of category II reservoir (special low infiltration reservoir), belonging to the puncture wounds on the pore structure, the type of small jet, local development category drop I reservoir (general low infiltration reservoir).According to Advance Pilot Water injection tests, it determine the timing, modalities and related wells network technology policy. Geng 19 wells area Chang 2reservoir deposit taken 300m from wells, water injection area network is anti-9, the pressure can reach the corresponding strata wells near the original stratum pressure, water injection cycle reasonable advance for 3~4 months.