塔南凹陷洼槽区下白垩统油气成藏主控因素研究
发布时间：2019-02-17 11:02
【摘要】：研究区为海拉尔-塔木察格盆地(简称海塔盆地)中部断陷带塔南凹陷的洼槽区,总面积约3500 km~2。勘探现状表明,洼槽区深层地层中仍存在有利于油气聚集的有效储层,是油气勘探的新领域。本文运用油气地质勘探理论和地球物理技术,通过岩心观察描述、大量地质统计分析、储层微观地质特征研究、次生孔隙带预测、成藏条件与规律研究,储层地球物理预测和综合评价等技术,总结了具有代表性的深洼区油气及其储层基本地质特征、成藏地质条件、预测有效储层分布。深度上洼槽区深层油气藏集中分布在各自的次生孔隙发育带,断裂控制油气的宏观运聚成藏格局,次生孔隙决定具体的油气藏形成与油气富集,而原油相态的变化有效地拓深洼槽区油气富集的空间和领域,是洼槽区深层油气运聚成藏的重要特征;层位上,洼槽区深层油气藏应首先集中分布在T3、T23、T22等不整合面及其附近,其次集中烃源岩夹持的储层段中,洼槽区深层油气藏分布与富集主要与次生孔隙的发育有关,与构造高低无关;平面上,洼槽区深层油气藏多分布于洼槽中心或断裂发育带。油气藏的分布与油气富集主要受次生孔隙发育的控制,这就是中部断陷带洼槽区深层油气藏分布与富集的根本特殊规律。
[Abstract]:The study area is the depression of the Tanan sag in the central fault depression zone of the Hailaal-Tamchag basin (referred to as the Haita basin), with a total area of about 3500 km~2.. The present situation of exploration shows that there are still effective reservoirs in deep layer of depression area which are favorable to oil and gas accumulation and are a new field of oil and gas exploration. In this paper, by means of oil and gas exploration theory and geophysical technology, through core observation and description, a large number of geological statistical analysis, reservoir microscopic geological characteristics, prediction of secondary pore zone, reservoir forming conditions and rules, Reservoir geophysical prediction and comprehensive evaluation are used to summarize the basic geological characteristics of oil and gas and their reservoir formation geological conditions and to predict the distribution of effective reservoirs. Deep oil and gas reservoirs in deep upper depression are concentrated in their secondary pore development zones. Faults control the macro migration and accumulation of oil and gas, and secondary pores determine the formation and enrichment of oil and gas reservoirs. The change of phase state of crude oil effectively extends the space and field of oil and gas accumulation in deep depression area, which is an important feature of deep oil migration and accumulation in depression area. On the horizon, the deep reservoirs in the depression area should be concentrated on the unconformities of T _ (3) T _ (23) T _ (22) and its vicinity, and the distribution and enrichment of the deep reservoirs in the depression region are mainly related to the development of secondary pores. It has nothing to do with the height of the structure; On the plane, deep reservoirs in the trough area are mostly distributed in the center of the depression or in the fault development zone. The distribution and enrichment of oil and gas reservoirs are mainly controlled by the development of secondary pores, which is the fundamental special law of the distribution and enrichment of deep reservoirs in the depression area of the central fault depression zone.
【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
本文编号：2425096
[Abstract]:The study area is the depression of the Tanan sag in the central fault depression zone of the Hailaal-Tamchag basin (referred to as the Haita basin), with a total area of about 3500 km~2.. The present situation of exploration shows that there are still effective reservoirs in deep layer of depression area which are favorable to oil and gas accumulation and are a new field of oil and gas exploration. In this paper, by means of oil and gas exploration theory and geophysical technology, through core observation and description, a large number of geological statistical analysis, reservoir microscopic geological characteristics, prediction of secondary pore zone, reservoir forming conditions and rules, Reservoir geophysical prediction and comprehensive evaluation are used to summarize the basic geological characteristics of oil and gas and their reservoir formation geological conditions and to predict the distribution of effective reservoirs. Deep oil and gas reservoirs in deep upper depression are concentrated in their secondary pore development zones. Faults control the macro migration and accumulation of oil and gas, and secondary pores determine the formation and enrichment of oil and gas reservoirs. The change of phase state of crude oil effectively extends the space and field of oil and gas accumulation in deep depression area, which is an important feature of deep oil migration and accumulation in depression area. On the horizon, the deep reservoirs in the depression area should be concentrated on the unconformities of T _ (3) T _ (23) T _ (22) and its vicinity, and the distribution and enrichment of the deep reservoirs in the depression region are mainly related to the development of secondary pores. It has nothing to do with the height of the structure; On the plane, deep reservoirs in the trough area are mostly distributed in the center of the depression or in the fault development zone. The distribution and enrichment of oil and gas reservoirs are mainly controlled by the development of secondary pores, which is the fundamental special law of the distribution and enrichment of deep reservoirs in the depression area of the central fault depression zone.
【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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