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随着油气勘探的逐渐深入，现已在十屋断陷发现许多圈闭，这些圈闭中已见到较好的工业油气流。特别是部分井在非构造上打出高产气井之后，人们逐渐注重非构造圈闭的研究。根据钻井、地震剖面反射特征分析，综合前人研究成果，认为十屋断陷非构造圈闭主要为地层圈闭、岩性圈闭、复合圈闭三种类型。地层圈闭主要表现为削切不整合面，超覆不整合面；岩性圈闭主要是沙河子组、营城组、登娄库组低水位期发育的冲积扇砂体，河道砂体、湖泊三角洲砂体上倾尖灭、水下重力流河道砂体；复合圈闭主要为地层岩性与构造（背斜）圈闭共同构成。上述圈闭是下一步勘探工作的目标。

Characteristics of the Non-structural Traps in Shiwu Fault Depression of South Songliao Basin

Along with further exploring for oil and gas, many traps have been found out in Shiwu fault depression at present and commercial oil and gas flow has been discovered in some of them. More attention has been gradually given to the research on non structural traps, especially after obtaining some high production gas wells drilled on non anticlines. On the basis of analyzing drilling data and seismic reflection characters and of summarizing our predecessors,research results, it was considered that in Shiwu fault depression, there mainly are three types of non structural traps, i.e. stratigraphic traps, lithologic traps and combination traps. The stratigraphic traps are mainly expressed as truncated unconformity surfaces and overlap unconformity surfaces; the lithologic traps include mainly the updip pinch out shallow water sedimentated alluvial fan sand bodies, channel sand bodies, lake delta sand bodies and underwater gravity flow channel sand bodies in Shahezi Formation, Yingcheng Formation and Denglouku Formation; and the combination traps are mainly composed of the stratigraphic, lithologic and structural(anticlinal) traps. All of them are regarded as the next exploration targets.