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Study and application of the combination technique of secondary oil recovery with tertiary oil recovery in low permeability reservoirs
Author(s): 
Pages: 69-72
Year: Issue:  5
Journal: PETROLEUM GEOLOGY AND ENGINEERING

Keyword:  濮城油田沙三中1-5油藏采收率评价效果;
Abstract: 濮城油田沙三中1-5油藏属于低孔低渗裂缝型油藏,层间非均质性强、渗透率级差大,使得油藏层间动用状况差异大,主力油层采出程度高、水淹严重,非主力层水驱动用低,采出程度低,油藏递减大,开发效果变差.针对此油藏以前调剖存在的难点,研究改进并应用了"2+3"组合提高采收率技术,即NAL可控无机凝胶调剖技术与ZY微生物驱油组合技术.应用效果表明,该技术不但能在纵向上改善吸水剖面,还可大幅提高洗油效率,经济效益明显.
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