论文部分内容阅读
荣胜堡次凹是大民屯凹陷中的一个主要生油区,位于大民屯凹陷的最南端(图1)。次凹三面被断层所围,面积为92km~2。该区主要由砂泥岩互层的下第三系沙三段(S_3)地层构成,厚度达3400m。根据岩性、电性、含油气性及地震反射特征,沙三段地层可细分为四个亚层(图2).经研究,发现次凹内沙三段各层系圈闭类型较多(图6),既有半背斜构造、断块构造等构造圈闭,又有泥岩刺穿及断崖冲积砂体(图3、图4)等圈闭。
The Rongshengpu sub-concave is a major oil-producing area in the Damintun depression, located at the southernmost tip of the Damintun depression (Figure 1). Sub-concave surface surrounded by a fault, an area of 92km ~ 2. The area is mainly composed of sandstone-mudstone interbedded Lower Third Member Sha3 Member (S_3) formation, thickness of 3400m. According to the characteristics of lithology, electricity, oil and gas, and seismic reflection, the Es3 Member can be subdivided into four sub-layers (Figure 2) .According to the research, it is found that there are many trap types (Fig. 6). They have traps such as semi-anticlinal structures and fault block structures, as well as traps of mudstone and fault-alluvial sand bodies (Fig. 3 and Fig. 4).