安塞油田桥19井区长3油层组储层特征研究及目标区优选
发布时间：2019-03-06 16:14
【摘要】：鄂尔多斯盆地是我国最早发现油田的盆地之一,也是我国第二大含油气盆地,油气资源丰富。随着鄂尔多斯盆地石油勘探不断取得进展,钻探开发出大量新的出油井点,由此获取的丰富资料为深入研究延长组长3提供可能,由此认识到长3不仅是中生界主要的生油层,同时也是良好的储层,具有形成有利自生自储式油藏的条件,其深水区存在的浊积岩作为石油储层,打破了深水区为油气勘探禁区的观念。采用标志层-基准面旋回转换点综合分层法,在长3小层精细划分对比的基础上分析该区构造特征,研究表明该区发育的构造对油气控制作用不明显。通过岩石类型、重矿物的特征、古河流方向并且结合前人的研究成果,认为长3储层的物源主要来自东北-西南部。同时在物源分析的基础上对研究区长3时期沉积体系进行了系统的研究,认为长3储层是曲流河三角洲沉积,有长33到长31历史时期,三角洲面积逐渐减小,长31、长32、长33广泛形成浊积岩,形成良好的储层。在研究区,应用区内铸体薄片、电镜扫描等各种分析测试资料发现,储层岩性以细粒长石砂岩为主,孔隙类型以粒间孔为主,总体上物性差,为特低孔低渗储层,同时对比该地区孔隙度与渗透率的变化趋势,可知孔隙度与渗透率具有较好的相关性。储层宏观和微观非均质性都较强,夹层频率由长31到长33依次减小,平面图上以块状局部地区分布。同时建立了研究区的储层“四性关系”,对研究区的孔隙度、渗透率及含油饱和度进行了重新认识。进而进行储层评价,将储层划分为五个等级,为之后的有利目标区优选提供依据。另外沉积环境及成岩作用是影响储层物性的主要因素,广泛发育的裂缝为油气运移提供了良好的通道。研究认为,物性较好的浊积水道砂体是油气聚集的有利场所。同时,长3浊积岩紧邻三角洲中心,具有良好的生、储、盖组合,在浊积水道微相砂体厚度大,结合生产、试油资料以及储层综合评价等方法优选出多个有利目标区,并提出下一步油气勘探的方向。
[Abstract]:The Ordos Basin is one of the earliest basins in China, and it is also the second largest oil-gas basin in China. With the development of the petroleum exploration in Erdos basin, a large number of new well points have been developed, and the abundant information obtained is provided by the extended group leader 3 in-depth study, and it is recognized that the long 3 is not only the main oil-bearing oil layer but also a good reservoir. The present invention has the condition of forming an advantageous self-storage reservoir, and the turbidite existing in the deep water zone is used as the petroleum reservoir, and the concept of the oil and gas exploration restricted zone in the deep water zone is broken. The structure characteristics of this area are analyzed on the basis of the fine division and comparison of the long 3 small layers by means of the combination of the mark layer and the reference plane cyclic conversion point. The results show that the structure of this area is not obvious to the control of oil and gas. By the rock type, the characteristics of the heavy minerals, the direction of the ancient rivers and the research results of the predecessors, it is considered that the source of the long 3 reservoir is mainly from the northeast and the south-west. At the same time, on the basis of the analysis of the material source, the study on the system of the three-period deposition system of the study area is carried out, and it is considered that the long 3 reservoir is the meandering river delta deposit, with a length of 33 to 31 years, the delta area is gradually reduced, and the long 31, the long 32 and the long 33 form the turbidite, To form a good reservoir. In the study area, various analysis and test data such as cast-body sheet and electron microscope scanning in the application area have been found. The reservoir lithology is dominated by fine-grained feldspar sandstone, and the pore type is dominated by intergranular pores, and the overall physical property is poor, which is a low-porosity and low-permeability reservoir. It is found that porosity and permeability have a good correlation with the change trend of porosity and permeability in the area. The macro-and micro-heterogeneity of the reservoir is strong, the frequency of the interlayer is reduced from 31 to 33 in sequence, and the plan is distributed in a block-shaped local area. At the same time, the reservoir "four-sex relationship" of the study area is established, and the porosity, permeability and oil saturation of the study area are re-recognized. Furthermore, the reservoir evaluation is carried out, and the reservoir is divided into five grades, and the favorable target area after the reservoir evaluation is preferably provided. In addition, the sedimentary environment and diagenesis are the main factors that affect the physical property of the reservoir, and the widely developed fracture provides a good channel for the migration of oil and gas. The study is that the turbidite channel sand body with better physical properties is a favorable place for oil and gas accumulation. At the same time, the long 3 turbidite is close to the center of the delta, and has a good combination of raw, reservoir and cover. In the method, a plurality of favorable target areas are preferably developed in the method of large thickness of the micro-phase sand body of the turbidite channel, combined with production, test oil data and comprehensive reservoir evaluation, and the direction of the next step of oil and gas exploration is proposed.
【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
本文编号：2435684
[Abstract]:The Ordos Basin is one of the earliest basins in China, and it is also the second largest oil-gas basin in China. With the development of the petroleum exploration in Erdos basin, a large number of new well points have been developed, and the abundant information obtained is provided by the extended group leader 3 in-depth study, and it is recognized that the long 3 is not only the main oil-bearing oil layer but also a good reservoir. The present invention has the condition of forming an advantageous self-storage reservoir, and the turbidite existing in the deep water zone is used as the petroleum reservoir, and the concept of the oil and gas exploration restricted zone in the deep water zone is broken. The structure characteristics of this area are analyzed on the basis of the fine division and comparison of the long 3 small layers by means of the combination of the mark layer and the reference plane cyclic conversion point. The results show that the structure of this area is not obvious to the control of oil and gas. By the rock type, the characteristics of the heavy minerals, the direction of the ancient rivers and the research results of the predecessors, it is considered that the source of the long 3 reservoir is mainly from the northeast and the south-west. At the same time, on the basis of the analysis of the material source, the study on the system of the three-period deposition system of the study area is carried out, and it is considered that the long 3 reservoir is the meandering river delta deposit, with a length of 33 to 31 years, the delta area is gradually reduced, and the long 31, the long 32 and the long 33 form the turbidite, To form a good reservoir. In the study area, various analysis and test data such as cast-body sheet and electron microscope scanning in the application area have been found. The reservoir lithology is dominated by fine-grained feldspar sandstone, and the pore type is dominated by intergranular pores, and the overall physical property is poor, which is a low-porosity and low-permeability reservoir. It is found that porosity and permeability have a good correlation with the change trend of porosity and permeability in the area. The macro-and micro-heterogeneity of the reservoir is strong, the frequency of the interlayer is reduced from 31 to 33 in sequence, and the plan is distributed in a block-shaped local area. At the same time, the reservoir "four-sex relationship" of the study area is established, and the porosity, permeability and oil saturation of the study area are re-recognized. Furthermore, the reservoir evaluation is carried out, and the reservoir is divided into five grades, and the favorable target area after the reservoir evaluation is preferably provided. In addition, the sedimentary environment and diagenesis are the main factors that affect the physical property of the reservoir, and the widely developed fracture provides a good channel for the migration of oil and gas. The study is that the turbidite channel sand body with better physical properties is a favorable place for oil and gas accumulation. At the same time, the long 3 turbidite is close to the center of the delta, and has a good combination of raw, reservoir and cover. In the method, a plurality of favorable target areas are preferably developed in the method of large thickness of the micro-phase sand body of the turbidite channel, combined with production, test oil data and comprehensive reservoir evaluation, and the direction of the next step of oil and gas exploration is proposed.
【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
【参考文献】
相关期刊论文 前1条
1 王建民;鄂尔多斯盆地南部中生界长3油层油气分布特征及油藏类型分析[J];矿物岩石;2000年04期
，本文编号：2435684
本文链接：https://www.wllwen.com/kejilunwen/diqiudizhi/2435684.html
