混相液洗井工艺在低渗透油田的应用

长庆油田所管辖的鄂尔多斯盆地,根据油气层的特低渗透特性发展起来的混相液洗井工艺,目前已经得到广泛应用,但相关文献分析、过程研究等很少见到。本文以流体力学、井控原理等为基础,详细分析了混相液洗井的原理及洗井过程中的流态变化、压力变化、冲刷影响等,并通过现场应用对比常规清水洗井效果,得出了部分借鉴意见,以期对现场应用起到抛砖引玉的效果。

Rresearch on principle and application of miscible fluid dlushing technology in low permeability oil reservoirs

Chang qing oil field under the jurisdiction of the ordos basin,According to oil and gas layer of ultra-low permeability characteristics developed miscible liquid flushing technology is now widely used,however,The literature analysis and the process of research rarely seen,This paper is based on fluid mechanics and principles of well control,A detailed analysis of miscible liquid flushing principle and flushing in the process of change in flow pattern、pressure changes、the effects of erosion,And through field application of conventional contrast to the effect of water flushing,obtained some reference views,expect these views to on-site application get good effect.