靖安油田地质和油藏工程技术应用效果

APPLICATION OF GEOLOGY AND RESERVOIR ENGINEERING TECHNIQUES TO JINGAN OILFIELD

靖安油田是鄂尔多斯盆地继安塞油田之后于 2 0世纪 90年代发现的 3亿t级特低渗透油田 ,属典型的大型湖盆三角洲沉积体系。湖盆三角洲沉积微相和沉积序列组合的精细油藏描述技术是油田成功开发的基础。适应油藏低压、低渗透特点的先期注水技术有效地抑制了高泥质含量 (2 0 % )碎屑岩地层压降区粘土膨胀堵塞喉道的负面影响 ,建立油藏早期的有效驱替系统的开发方式 ,使单井产量稳定提高 ;应用油藏水动力受效单元和平面径向调差技术、油藏数值模拟跟踪研究技术 ,尤其是特低渗透油藏整体开发压裂技术、注气及气水交注开发方式的实践 ,进一步提高了油田的开发水平 ,该油藏已成功地实现了 6年低含水采油 ,采收率由方案设计的 17%提高到了 2 4%。

Jingan Oilfield is discovered in 1990s.It is an integrative oilfield with special lower permeability and 0 3 billion tons of reserve and belongs to a typical sedimentation system of large lake delta.Delicate description technique for reservoir in combination of lake delta sedimentation micrafacies and sedementation sequence is the basis of successful exploitation for Jingan Oilfield.The advanced water injection technique for reservoir with low pressure and permeability features suppresses effectively the bad effect of throat blockage resulting from clay swelling at pressure-declined areas in the clastic rock formation with a high shaly content (20%).Establishment of a production mode with an effective displacement system in the early period of reservoir makes a stable output of a single well increased obviously.Adapting the division units affected by reservoir hydrodynamics,the plane radial adjusting technique and trace research with reservoir numerical simulation,the reservoir has successfully realized no?-water production for 6 years.The recovery factor has been raised from 17% designed in project to 24%.The integrated exploitation and fracturing technique favorable for the reservoir with a special low permeability and a production mode with gas injection and gas-water alternative injection have been approached in this oilfield.