There is good oil and gas exploration potentiality in the low permeability chang 4+5 reservoir on Yanchang Formation in Jiyuan Area(abbreviate chang 4+5,), Ordos Basin.

• 鄂尔多斯盆地姬塬油田延长组长4+5油层组（简称长4+5）低渗储层具有良好的油气勘探潜力。