Yanchang Oilfield C6Low Permeability Reservoir Development Scheme Design Optimization Study

Yanchang oilfield is located in Erdos Basin, proven oil reserves are all contained in thepermeability of sandstone reservoir is less than20×10-3. C6low permeability reservoir ofYanchang oilfield is a typical low permeability sandstone reservoir lithology, geologicalconditions common to the compact, low permeability, low porosity, low pressure, low oilsaturation, feldspathic fine-silty sandstone as the main character; common features indevelopment work is drilled through the oil layer, the no natural yield, only after fracturing isthe industrial exploitation of the value, but the single well production decline rapidly. From thebasic principles of reservoir physical point of view, C6low permeability reservoir is stronger,the natural energy release speed faster, temporary yield is higher, but the oil depletion period isshort, because the recovery rate of fracturing can not fundamentally improve the elastic+dissolved gas drive. So, these basic characteristics become the biggest objective factors inYanchang oilfield production, and become the bottlenecks of the further sustainabledevelopment of oilfield.The research paper, mainly in the low permeability reservoir of C6as the object of study,analysis of regional characteristics, the development of comprehensive evaluation of thecurrent situation, development of technology policy optimization and development adjustmentscheme optimization, and put forward a set of the reservoir rock properties and reservoircharacteristics of reservoir development adjustment scheme of optimization design and thecorresponding yield measures, improve the reservoir development level and economic benefitof the production. Research results will be the guidance for the development of lowpermeability reservoir is long6, has the reference value to improve the reservoir developmentlevel and economic benefit of the production, but also with reference to the similar reservoirs.