| Extra low permeability oil field occupies nearly60%investment in the development ofoil fields or proven reserves in China in recent years, How to develop this kind of reservoir isthe main problem facing China’s petroleum industry. Characteristics of Erdos Basin Xiasiwanoilfield mainly oil-bearing formation Chang2reservoir has low porosity, low permeability,low oil saturation, Reservoir distribution is mainly controlled by sedimentary facies andstructural nose control. Spring63-65well Chang2reservoir physical property is poor, seepageresistance, low natural deliverability. This kind of oil reservoir to maintain stable and has aspecial dependence on formation pressure level, If the reservoir pressure level can not beeffectively recovered, so the water reservoir is difficult to maintain the stable production. Withthe deepening of the production development, the contradictions have become increasinglyprominent, especially on the heterogeneity of the knowledge layer and interlayer, affect thedeployment of development wells and water injection development result. In order to adjustthe development plan, tapping the potential of remaining oil, enhanced oil recovery, the urgentneed for the overall and profound understanding of the geological characteristics of the region.Based on the field investigation, comprehensive evaluation of the sedimentarymicrofacies types of spring63-65well area, reservoir characteristics, combined with the actualproduction situation, analysis of gas well dynamic production, from the well spacing density,single well controlled production, formation pressure, injection production ratio and otheraspects, analysis of adjustment and control policies well area thoroughly. Practicalwaterflooding technology policy limits the development and integrated management of theadjustment scheme has certain reference significance to similar reservoir developmentefficient water injection in Erdos basin. |
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