大庆外围特低渗透特低丰度油田开发技术研究

针对大庆外围油田特低渗透、特低丰度储层难以有效开发动用的难题,综合应用地震、地质、测井资料,研究形成了识别薄窄砂体的空变子波地震反演、独立变量分析、虚拟井预测技术,砂体预测精度达到85%以上。建立了基于非达西渗流条件下的不同井网产量计算模型,提出了裂缝性油藏井网优化设计方法。运用适合超薄油层水平井开采技术及特低渗透储层蒸汽吞吐和微生物采油技术,使大庆外围油田2005年原油产量突破了500×10⁴t。

Effective development technique for peripheral reservoirs with ultra-low permeability and ultra-low abundance in Daqing Oilfield

The peripheral reservoirs in Daqing Oilfield are hard to be effectively developed,because of ultra-low permeability and ultra-low abundance.The seismic,geologic and logging data were used to set up a series of techniques including the space variant wavelet seismic inversion,independent variable analysis and fictitious well prediction techniques.The prediction accuracy in identification of thin and narrow sand bodies was more than 85 percent.The calculation model for different patterns in non-Darcy flow condition was established.A design method for pattern optimization of fractured reservoir was presented.Horizontal well production technology for the super-thin reservoirs,and the steam huff and puff and microbial flooding technique for ultra-low permeable reservoirs were applied in the peripheral reservoirs of Daqing Oilfield.The annual oil production of peripheral reservoirs in Daqing Oilfield was over five million tones in 2005.