青西油田下白垩统下沟组储集层特征
Xinjiang Petroleum Geology(2003)
Abstract
青西油田下白垩统下沟组(K1g)为深层裂缝-孔隙型砾岩储集层,油藏埋深4 200~4 600m,基质孔隙度小于8%,基质渗透率小于1×10-3μm2.由于砾岩储集层内高角度裂缝发育,改善了它的渗流性能.针对这类低孔、低渗透储集层,通过岩石成分、孔隙类型及组合、孔隙结构、核磁共振、测井评价及测试等技术,并结合裂缝平面预测结果,进行储集层预测,取得了良好的效果.
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Key words
low permeability conglomerate reservoir,qingxi oilfield,xiagou formation,low permeability,charac-teristics
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