瓦窑堡油田斜沟岔油区地质研究

发布时间：2018-09-06 10:33

【摘要】：斜沟岔油区是瓦窑堡油田近几年才开发的新区块。目前仍然处于勘探开发初期阶段，，对油藏的分布认识不清,对区内沉积、构造、储层特征以及油藏特征没有明确的认识。随着勘探开发进程的不断推进,有必要对研究区油藏进行精细描述,对有利区块进行预测与评价。本文利用研究区大量地质、岩心、钻井、录井和地球物理测井等资料,用切合研究区实际的方法和技术,对研究区延长组地层、构造、沉积、储层特征、油藏特征等进行了研究和评价。发现本区油藏发育整体较差,开发层系主要为长2、长4+5、长6油层组,以平缓的西倾单斜为主,局部发育鼻状隆起,油藏具有低孔、低渗、低含油饱和度的特点,属于地质构造活动较弱的岩性油藏。主要的有效烃源层是长7层的张家滩页岩及暗色泥岩。油气的运移方式以垂向和近距离侧向运移为主。油藏分布与构造关系非常密切,长6、长4+5油藏主要分布在鼻隆及坡度较陡的地区,长2油藏分布在构造的高部位。最终对有利含油区块进行预测,为整个区块后续的开发提供了地质依据。
[Abstract]:Jiaogoucha oil area is a new block developed in Wayaobu oilfield in recent years. At present, it is still in the early stage of exploration and development. The distribution of the reservoir is not clear, and there is no clear understanding of the deposition, structure, reservoir characteristics and reservoir characteristics in the area. With the development of exploration and development, it is necessary to describe the reservoir in the study area and to predict and evaluate the favorable area. In this paper, a large amount of geological, core, drilling, logging and geophysical logging data are used to study the formation, structure, deposition and reservoir characteristics of Yanchang formation in the study area. Reservoir characteristics were studied and evaluated. It is found that the development of reservoirs in this area is poor as a whole. The development layers are mainly Chang 2, Chang 45, Chang 6 oil layers, with gentle westward inclination and monoclinal, local nose uplift. The reservoirs have the characteristics of low porosity, low permeability and low oil saturation, and the reservoir is characterized by low porosity, low permeability and low oil saturation, and the reservoir is characterized by low porosity, low permeability and low oil saturation. It belongs to lithologic reservoir with weak tectonic activity. The main effective source beds are Zhangjiatan shale and dark mudstone. The oil and gas migration mode is mainly vertical and close lateral migration. The reservoir distribution is closely related to the structure. Chang 6 and Chang 45 reservoirs are mainly distributed in the areas with steep slope and nose uplift, and Chang 2 reservoirs are located in the high parts of the structure. Finally, the favorable oil-bearing blocks are predicted, which provides geological basis for the subsequent development of the whole block.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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