松南地区十屋断陷非构造圈闭特征
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摘要
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
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.
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.
引文
1 徐怀大等.从地震地层学到层序地层学.北京:石油工业出版社.1997,6
2 王永春.松辽盆地南部岩性油藏的形成和分布.北京:石油工业出版社.1997:181～192
3 薛叔浩,刘文林,薛良清等.湖盆沉积地质与油气勘探.北京:石油工业出版社.2002:156～157
4 赵庆集,何新华,赵秀梅.松辽盆地演化及油气成藏规律.北京:地质出版社,1997
5 吴金才,兰素清.松南十屋断陷构造—岩性复合圈闭样式.石油天然气地质,2003;24(1):62～63
2 王永春.松辽盆地南部岩性油藏的形成和分布.北京:石油工业出版社.1997:181～192
3 薛叔浩,刘文林,薛良清等.湖盆沉积地质与油气勘探.北京:石油工业出版社.2002:156～157
4 赵庆集,何新华,赵秀梅.松辽盆地演化及油气成藏规律.北京:地质出版社,1997
5 吴金才,兰素清.松南十屋断陷构造—岩性复合圈闭样式.石油天然气地质,2003;24(1):62～63
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