济阳坳陷蕴含着许多隐蔽油气藏,而隐蔽油气藏与坡折带的关系密切,故研究坡折带组合类型将有助于有效地寻找隐蔽油气藏。对济阳坳陷坡折带的研究表明,在进行坡折带的划分时应综合考虑坡折带在剖面上的几何样式、组合类型、沉降情况、所处位置及成因等对沉积和圈闭起主要作用的因素,而不能以单一因素为据进行划分。据此将济阳坳陷的坡折带划分为3个大组合类型、8个小组合类型;3大组合类型是板式、铲式和坡坪式,8个小组合类型是板式单阶持续下陷型、板式单阶间歇下陷型,板式多阶书斜型、板式多阶帚型、铲式单阶型、铲式多阶型、坡坪式盆缘型和坡坪式盆内型。认为坡折带的类型不同对低位体系域的控制也有所差别并形成了不同类型的隐蔽圈闭;在实际勘探开发过程中,应先确定坡折带的类型并结合钻井等资料来进行隐蔽油气藏的预测。

Abundant subtle oil and gas reservoir,which tied up with slope-break,were embedded in Jiyang depression.Further studying of the grouping type of Slope-break is favor of more effective forecasting of abundant subtle oil and gas reservoir.The studying of the slope-break in Jiyang depression indicated that much factor,such as geometry style of profile,grouping style,subsidence factor,location and genesis et al.not one factor should be considered when the division of slope-break.In term of these factors,the slope-break in Jiyang depression was divided into three la rge grouping types, and eight small grouping types. The three large grouping typ es were flat style, spade style and slope-flat style. The eight small grouping  types were successional subsidence type of flat style with one step, intermitten t subsidence type of flat style with mul-steps, tilted-book type of flat style  with mul-steps,broom type of flat style with mul-steps, one-step type of spade style, mul-st ep type of spade style, basin margin type of slope-flat style, basin inner type  of slope-flat style. The control of slope-break on Lowstand system tract was  different with its type.  And different subtle traps were formed. The type of s lope-break should be first judged, and combining with well data for subtle tra ps forecasting when practical exploration.