Research On Production Characteristics And Development Stratedy Of Chang 8 Reservoir,Jinghe Oil-filed,Ordos Basin

Low permeability reservoir is a very important oil and gas resources in China at present,which has great reserve potential,but because of its particularity and complexity,there are still many problems in the production and development.Therefore,it is very important to study how to develop low permeability reservoir reationally and effectively.Ordos basin Mesozoic has very rich oil and gas resources.Its Triassic Yanchang Formation main development low porosity and low permeability reservoir which is usually characterized by tight reservoir poor physical properties,strong heterogeneity and complex fluid property.Jinghe Chang 8 reservoir is locted in the south of Ordos basin which is a typical of low porosity and low permeability reservoir.In the area,faults and nature fracture are developed,complex structure and oil-water relation is unknow.The production and development are mainly controlled by the distribution of oil and water,crude oil properties,energy supplement and development mode which caused the difficulties in development and failed to get better economic benefits.The thesis is based on the previous research results of Jinghe oilfield,combined with the core observation,logging and production characteristics,analyzed the reservoir characteristics and fluid properties of the Chang 8 member of the Yanchang formation and established the shandard of fluid types,and predicted the oil-water distribution and heavy oil distribution in the area.Grasped the current production dynamic characteristics in Jinghe Chang 8 reservoir by analyzing the type of production wells,reservoir productivity,production decline and water-cut trend.Summing up the aboive research results proposed the technical measures and suggestions,such as water injection,water controlling,thermal recovery of heavy oil and refracturing,for different well areas and different types of production wells.Providing evidence for development program plan and implenmentation to next production for Jinghe reservoir.Ensuring oilfield can further improve oil recovery and keeping the stable production.And realizing the development reationally and effectively of Jinghe Chang 8 reservoir.