The Dynamic Analysis And Optimization Of Injection-production Parameters In Block Sha Gou, Jingbian Oilfield

The waterlfooding can effectively supplement the formation energy ofLow-permeability Reservoirs,to improve the Low-permeability Reservoir formation pressure.Low-permeability reservoir in Erdos Basin in Northern Shaanxi has been turned intowaterflood development time, so it is very important for studying Waterflooding. JingBianoilifeld Sha Gou Chang6reservoir is a typical Low-permeability Reservoir, Using thecombined method of analysis of reservoir development geology and reservoir engineeirng,dynamic analysis of the Sha Gou Chang6reservoir, and the optimized injection-productionparameters.Fine strati graphic classification and correlation, the study of reservoir characteristics,reservoir fluid properties expeirment, geological reserves calculation, the study ofcharacteirstics of reservoir and so on, provide an important basis and guidance for reservoirengineeirng demonstration. Then, reservoir engineering demonstration, including exploitationof the status quo analysis, waterflood feasibility analysis, well pattern design, pressuresystem design. Finally, with the production practice，to determine the injection-productionparameters.There are several main innovations in this paper as follows: Sha Gou Chang6areamainly to the lithologic oil reservoir, the local tectonic effect; Sensitivity analysis of strong saltsensitivity, middle to strong water sensitivity, middle to weak speed sensitivity, suitable forwater injection development; Through reservoir engineering analysis demonstrates that theChang6reservoir water dirve recovery rate reached20,09%; The reasonable oil recovery rateis1,42%; Injection wellhead maximum injection pressure is11.46MPa，the pressure differenceof5.27MPa reasonable production wells; The reasonable well spacing density is13.8/k2m;using diamond anti-nine square well network,the well distance in450><150m. finally，determining the reasonable injection-production ratio of Chang6reservoir is about1.55. In this paper, the study area of injection-production parameters are optimized, and have importanttheoretical and practical significance to reasonable development of the region.