辽河西部凹陷清水洼陷周边沙三段致密砂岩有效储层叠前地震预测

发布时间：2018-05-15 01:01

本文选题：叠前反演 + 致密砂岩　；参考：《东北石油大学》2015年硕士论文

【摘要】：清水洼陷是辽河坳陷最大的生油气洼陷,同时,古近系沙三时期发育了大面积连续分布的碎屑岩储层,储层以低孔低渗型砂岩为主,且直接与烃源岩接触,为致密砂岩油气藏的形成奠定了良好地质条件。长期以来,受储层非均质性强、有效储层难以预测的影响,严重制约了研究区致密砂岩油气藏的进一步勘探。本文针对致密砂岩有效储层难以预测的制约问题,基于岩石物理分析敏感弹性参数优选,应用叠前同时反演预测了砂体的展布特征;并结合试油法确定有效储层界限及储层类型,利用叠前地震反演进一步预测了有效储层的空间展布规律。1、通过大量的方法试验,确定Xu-White岩石物理模型是相对适合本区致密砂岩横波预测的方法。从敏感参数分析的结果来看,能够对致密砂岩储层的岩性及物性进行预测,但无法解决含油气性预测的难题;2、通过对测井、试油、岩心等数据的分析,确定了沙三段有效储层的下界,认为泥质含量与渗透率有密切的关系,是决定储层是否是有效储层的关键因素;3、预测结果表明清水洼陷沙三上段和沙三中段致密砂岩有效储层相对发育,沙三下段不发育。清水洼陷北部沙三中段为致密砂岩油气藏勘探的最有利领域。
[Abstract]:Qingshui depression is the largest oil-gas generating sag in Liaohe depression. At the same time, a large area of continuously distributed clastic rock reservoir was developed in the Paleogene Sha 3 period. The reservoir is dominated by low-porosity and low-permeability sandstone, and is in direct contact with the source rock. Good geological conditions have been established for the formation of tight sandstone reservoirs. For a long time, due to the strong heterogeneity of the reservoir and the difficulty of predicting the effective reservoir, the further exploration of the tight sandstone reservoirs in the study area has been seriously restricted. In this paper, the prestack inversion is used to predict the distribution characteristics of sand bodies based on the optimal selection of sensitive elastic parameters of rock physical analysis in view of the difficulty in predicting the effective reservoir of tight sandstone. Combined with the oil testing method to determine the effective reservoir boundary and reservoir type, the spatial distribution law of the effective reservoir is further predicted by pre-stack seismic inversion. The determination of Xu-White rock physical model is a relatively suitable method for prediction of shear wave of tight sandstone in this area. According to the results of sensitive parameter analysis, the lithology and physical properties of tight sandstone reservoir can be predicted, but it can not solve the difficult problem of oil and gas bearing prediction. Through the analysis of logging, oil testing, core and other data, The lower boundary of the effective reservoir in the third member of Shahejie formation is determined, and it is considered that there is a close relationship between the shale content and the permeability. It is a key factor to determine whether the reservoir is an effective reservoir. The prediction results show that the effective tight sandstone reservoirs are relatively developed in the upper and middle parts of the clear water sag, but the lower part of the third section is not developed. The middle part of Sha 3 in the north of Qingshui depression is the most favorable area for the exploration of tight sandstone reservoirs.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13;P631.4

【相似文献】