The structural slope - break zones are defined as the depositional slopes abrupt change in geomorphology and developed widely in fault and foreland basins , the recognition of which is significant for predicting the distribution of depositional systems tracts , particularly the lowstand systems tracts which usually comprised economically important reservoirs in these basins 构造坡折带是由构造活动所产生的、对沉积作用具有长期控制作用的古沉积斜坡或古地貌突变带，在断陷或前陆等盆地中普遍发育，其识别对阐明盆内沉积体系域，特别是构成重要油气藏的低位域的分布和预测具有重要意义。
The main thrusts are as following : the kenxi area lies in the slope zone between the bonan depression and gudao up lift , with a mesozoic sub - strata providing a big slope background elevated in a series of steps from the bonan depression south towards the kenxi horst , and then east towards gudao uplift , and so has been affected both by the movement of the gudao uplift and the sinking of bonan depression 通过研究认为，垦西地区位于渤南洼陷和孤岛凸起之间的坡折带，其中生界基底是由渤南洼陷向东面的孤岛凸起和向南的垦西地垒逐步抬升的一个大的斜坡背景，由于孤岛凸起的抬升和渤南洼陷的下降的带动。
It is therefore proposed in this paper to strengthen the exploration of such wide and deep subsags as chagannuoer and hongqi subsags , to lay emphasis on the exploration of superposed and residual fault depression , and to pay attention to the discovery of various oil and gas reservoirs including metamorphic buried hills , fracture slope breaks , and volcanic rocks , etc 因此，指出下一步应加强类似查干诺尔，红旗等宽深洼槽的勘探，重视具叠合型和残留型断陷的勘探，注重寻找包括变质岩潜山，断裂坡折带、火山岩等在内的各类油气藏。
This thesis predict profitable oil trap under the direction of the theory on searching for oil in faulty - step break , and select classy from them in terms of the style , scale , reservoir factor and shelter of the sedimentary sand - body distributing . take the low stand system of down - shasan formation for example , three favorable targets was put forth through synthesis analysis 本文在断阶坡折找油理论的指导下，对研究区内的有利圈闭进行了预测，并根据沉积砂体的分布类型、规模、储层物性以及封堵条件，再结合现有钻井的试油分析情况，对其进行优选，以沙三下段低水位体系域为例，经过综合分析，提出了3个有利的目标。
Near the faulty step - break , low stand system developed , and some sediment system distribute broad , such as alluvial fan , low stand wedge , low stand fan , and so on . the sand body can form not only the trap of dying out upward and sand lens , but also fault - iithology trap . the study shows that fault - lithology trap is most important trap style in study area especially sha - 3 formation 断阶坡折附近是低水位体系域发育的重要场所，常发育冲积扇、冲蚀作用的下切河道以及低水位楔状体、低水位扇体等沉积体系，这些砂体不仅具有形成上倾尖灭或砂岩透镜体圈闭的条件，而且可形成断层?岩性圈闭。
