The reservoir boundary includes oil-water contact, lithologic boundary and fault limit.
油藏边界主要包括油水界面、岩性边界和断层边界等。
And the boundary of them has the same lithologic character: the ravinement surface of river course or exposure mudstone of flooding plain and root clay.
二者的界面是相同的，均为河道砂体底部的冲刷侵蚀面或者是暴露过泛滥平原泥岩、根土岩等。
The identification and characterization of lithologic pinch-out boundary is always a problem in the description of subtle traps.
岩性尖灭线的识别与刻画，一直是隐蔽圈闭描述的难题。
The identification and characterization of lithologic pinch-out boundary is always a problem in the description of subtle traps.
岩性尖灭线的识别与刻画，一直是隐蔽圈闭描述的难题。
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