孙吴—嘉荫盆地下白垩统石油地质特征与有利区预测

发布时间：2019-01-11 10:18

【摘要】：孙吴-嘉荫盆地在以往的勘探过程中尚未发现油气显示。在逊克-沾河凹陷淘淇河组,新近完钻的嘉1井发现了较好的烃源岩,预示着孙吴-嘉荫盆地具有良好的勘探前景。本文试图在最新钻探结果和地震资料重新解释的基础上,进一步研究该盆地的石油地质特征,预测有利区带,取得了以下认识:孙吴嘉荫盆地生、储、盖层发育,具有丰富的油气资源,具备油气藏形成的条件,同时孙吴嘉荫盆地圈闭形成时间和排烃时间匹配良好,有利于油气藏的形成。孙吴-嘉荫盆地油气聚集最有利的地区为中部沾河断陷的逊克-沾河凹陷,在该盆地的各凹陷中面积最大,生储盖组合条件最好,构造落实,凹陷内存在断背斜构造,在其西侧还发现了多个由地层尖灭线控制的地层圈闭,并找出了多个构造圈闭,存在形成构造油气藏的可能。比较有利的构造带为ZH1号断层Ⅰ号断背斜。孙吴-嘉荫盆地西北部孙吴断陷中的腰屯凹陷勘探程度较低,潜力较大。凹陷内部生储盖组合以自生自储为主,匹配良好,淘淇河组烃源岩发育,凹陷深部烃源岩指标更好。淘淇河组湖相三角洲相发育提供良好的储层及盖层。储层为低孔中低渗,运移范围受限,北侧向斜SJ09-192.5测线CDP:2700位置构造附近有断层,有较大可能形成圈闭且靠近生烃中心,存在形成构造油气藏的可能。
[Abstract]:Oil and gas have not been discovered in the previous exploration process in Sunwu-Jiayin basin. In the Qaihe formation of Taogi formation in Xunke-Zhanhe depression, a relatively good source rock was discovered in the newly drilled Jia-1 well, which indicates that the Sunwu-Jiayin basin has a good exploration prospect. Based on the latest drilling results and reinterpretation of seismic data, this paper attempts to further study the petroleum geological characteristics of the basin, predict favorable zones, and obtain the following understanding: the genesis, reservoir and caprock development of the Sun Wu Jiayin Basin, It has abundant oil and gas resources and conditions for oil and gas reservoir formation. At the same time, the time of trap formation and hydrocarbon expulsion in Sun Wu Jiayin basin is well matched, which is beneficial to the formation of oil and gas reservoir. The most favorable area for oil and gas accumulation in Sunwu Jiayin basin is Xunke Zhanhe depression in Zhanhe fault depression in the central part of the basin. It has the largest area in each sag of the basin, the best assemblage of source, reservoir and caprock, structural implementation, and the existence of faulted oblique structures in the sag. On the west side, several stratigraphic traps controlled by tip-out lines are also found, and several structural traps are found, which are likely to form structural oil and gas reservoirs. The favorable structural belt is the ZH1 fault No. 1 fault back slope. The Xiaotun depression in the Sunwu fault depression in the northwest of Sun Wu-Jiayin basin is of low exploration degree and great potential. The internal assemblage of source reservoir and caprock in the sag is mainly authigenic and self-reservoir with good matching. The source rock of Amo-Qihe formation is developed and the index of deep source rock is better in the sag. The lacustrine delta facies of the Tao-Qi River formation provide good reservoir and caprock. The reservoir is low porosity, low permeability and limited migration range. There are faults near the CDP:2700 location of the SJ09-192.5 survey line of the north side syncline, which may form traps and close to the hydrocarbon generation center, and there is the possibility of forming structural oil and gas 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】：2017
【分类号】：P618.13

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