召51、苏77区块下古生界马家沟组马五段储层特征研究
发布时间：2018-11-28 15:22
【摘要】：苏77、召51区块位于鄂尔多斯盆地北部,中央古隆起东侧,苏里格气田东区西北区域。西起达来沟,东至通岗浪沟,北起加不沙,南接乌审召,面积约2007km2。天然气勘探自2000年开始,证实了苏里格气田的主力气层为下石盒子组盒8段以及山西组山1段。然而,近几年的开发实践表明：上古生界储层的致密性好、岩屑的含量高、有很强的非均质性,储层的预测难度大；含气砂体的规模小,有效储层具有较差的连续性和连通性,可采的单井储量低。因此,积极挖掘下古生界气藏的开发潜力,降低产能建设风险,成为气田实现经济有效开发的重要途径,气田坚持“上下古立体开发”的思路,取得了较好的开发效果。根据最新资料统计,苏里格气田东区累计加深至下古开发井460余口,钻遇气层/含气层井278口。其中,钻遇上组合气层/含气层井236口,平均有效厚度3.4m；钻遇中组合气层/含气层井97口,平均有效厚度3.5m。平均无阻流量达到25.9×104m3/d,最高无阻流量达到231×104m3/d(SD39-59A),相对上古气藏而言,下古生界气藏显示出较强的产气能力,对于提高该地区单井产量具有十分重要的意义。尽管下古生界气藏的开发取得了一定的成效,但就气藏的整体开发而言,仍然面临着一些问题,包括部分地层分布特征不清、上组合和中组合白云岩的形成机理和分布规律尚不明确,有效储层的发育特征、控制因素及其分布规律研究有待深入等等,都影响了有利区的预测及气藏的进一步开发规划。因此,有必要对该区下古气藏开展地质研究,加深对有效储层的精细化认识,为该区下古气藏整体开发方案的编制及产能建设优化部署提供科学合理的依据。以苏里格东区的研究资料为基础,通过对工区内140多口探井及开发井的详细研究,利用大量的测井资料并结合标志层的识别,对研究区马五段各小层进行了细致的划分与对比,统计出各层位的完错情况,并编绘了地层对比图,弄清了地层的分布规律。通过对岩心、岩石薄片、测井资料观察和研究,在单井、联井研究的基础上,认为研究区属于潮坪相,识别出2种亚相和8种微相,并采用单因素分析作图法编制了各小层的沉积相平面图。通过对研究区多种主要储层类型的研究认为,马五5主要的储层则是由准同生白云岩和埋藏白云化所形成的白云岩为主,其晶粒较粗,部分晶粒达到细晶级别,晶间孔发育。马五6-10以泥晶-细粉晶云岩、粗粉晶云岩为有利的储层。通过对区内研究层段储集岩的成岩作用,认为广泛发育的成岩作用有白云岩化、古岩溶、胶结交代、重结晶、压溶等,其中以白云化作用、溶蚀作用和充填作用对储集性的影响意义最大。通过对各研究层段储集性的总体特征及其平面变化规律的研究,从沉积微相及岩性、构造、成岩作用等方面分别探讨了影响储层储集性的主要因素,并分析了有效储层的展布规律,为有利区预测提供依据。根据储层的物性参数、孔隙结构、沉积微相及组成岩性、储集空间组合类型、成岩作用等综合指标,建立了储层分类体系,按照该体系对各研究小层进行了储层分类和综合评价。综合考虑沉积相、成岩作用、物性和古岩溶地貌等储层发育的控制因素,在对各小层有利区预测的基础上,优选出研究区各小层的有利区。
[Abstract]:The 51-block is located in the north of the Ordos Basin, the east of the central ancient uplift, and the northwest of the east of the Sulige gas field. From the west to the gullies, from the east to the on-the-the-gang wave ditch, the north from the non-sand, south to the UAI, the area is about 2007km2. Since 2000, the natural gas exploration has confirmed that the main gas layer in the Sulige gas field is the lower stone box group box 8 and the Shanxi Formation Mountain 1. However, the development practice in recent years has shown that the upper Paleozoic reservoir has good compactness, high content of rock cuttings and strong non-homogeneity, and the prediction of the reservoir is large; the size of the gas-bearing sand body is small, the effective reservoir has poor continuity and connectivity, and the recoverable single well is low in reserves. Therefore, the development potential of the lower Paleozoic gas reservoir is actively excavated, the risk of capacity construction is reduced, and the important way to realize the effective development of the gas field is an important way to realize the effective development of the gas field. According to the latest data statistics, the east side of the Sulige gas field has been deepened to the remaining 460 of the next development well, and the drilling is in the gas-bearing layer/ gas-bearing well 278. The average effective thickness is 3.4m, and the average effective thickness is 3.5m. The average open-flow rate is 25.9-104m3/ d, the maximum open-flow rate reaches 231-104m3/ d (SD39-59A), and the lower Paleozoic gas reservoir shows a strong gas-producing capacity relative to the upper paleogas reservoir, which is of great significance to the improvement of the single-well production in the region. Although the development of the lower paleozoic gas reservoir has achieved some results, the whole development of the gas reservoir still faces some problems, including the partial formation distribution, the formation mechanism and the distribution rule of the upper and middle combination dolostones are not clear, the development characteristics of the effective reservoir are not clear, The control factors and their distribution law are still to be studied, and the prediction of the favorable area and the further development and planning of the gas reservoir are affected. Therefore, it is necessary to carry out the geological research to the ancient gas reservoir in this area, to deepen the fine understanding of the effective reservoir, to provide scientific and reasonable basis for the preparation of the whole development plan and the optimal deployment of the production capacity. Based on the research data of the eastern side of the Sulige area, through the detailed study of the 140 multi-port exploratory well and the development well in the work area, a large number of well logging data is used and the identification of the sign layer is used, and the small layers of the five sections of the study area are divided and compared with each other, and the error condition of each layer is counted. The stratigraphic correlation diagram is compiled and the distribution rule of the formation is clarified. Based on the observation and study of core, rock sheet and logging data, the study area belongs to the tidal flat phase, and two sub-phases and 8 micro-phases are identified, and a single-factor analysis and mapping method is used to prepare the sedimentary facies plan of each small layer. Based on the study of many main reservoir types in the study area, the main reservoir of Math5 is the dolomite which is formed by the quasi-cogenic dolomite and the buried dolomitization, and the grain of the main reservoir is coarse, and some of the grains reach the fine grain level and the intercrystalline pore is developed. MAV 6-10 is a favorable reservoir for the fine-fine-fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, It is believed that the diagenetic effect of the extensive development is dolomitization, paleokarst, cementation and metasomatism, recrystallization, pressure dissolution, etc., in which the effect of dolotization, dissolution and filling on the reservoir property is the most important. The main factors that influence the reservoir property are discussed from the aspects of sedimentary microfacies and lithology, structure and diagenesis, and the distribution rule of the effective reservoir is analyzed. The reservoir classification system is established according to the physical property parameters of the reservoir, the pore structure, the sedimentary microfacies and the comprehensive indexes such as the lithology, the combination type of the reservoir space and the diagenesis, and the reservoir classification and the comprehensive evaluation are carried out for each small layer according to the system. Considering the control factors of the development of the sedimentary facies, diagenesis, physical property and the ancient rock and the like, the beneficial area of each small layer of the study area is preferably calculated on the basis of the prediction of the beneficial area of each small layer.
【学位授予单位】：长江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13
本文编号：2363273
[Abstract]:The 51-block is located in the north of the Ordos Basin, the east of the central ancient uplift, and the northwest of the east of the Sulige gas field. From the west to the gullies, from the east to the on-the-the-gang wave ditch, the north from the non-sand, south to the UAI, the area is about 2007km2. Since 2000, the natural gas exploration has confirmed that the main gas layer in the Sulige gas field is the lower stone box group box 8 and the Shanxi Formation Mountain 1. However, the development practice in recent years has shown that the upper Paleozoic reservoir has good compactness, high content of rock cuttings and strong non-homogeneity, and the prediction of the reservoir is large; the size of the gas-bearing sand body is small, the effective reservoir has poor continuity and connectivity, and the recoverable single well is low in reserves. Therefore, the development potential of the lower Paleozoic gas reservoir is actively excavated, the risk of capacity construction is reduced, and the important way to realize the effective development of the gas field is an important way to realize the effective development of the gas field. According to the latest data statistics, the east side of the Sulige gas field has been deepened to the remaining 460 of the next development well, and the drilling is in the gas-bearing layer/ gas-bearing well 278. The average effective thickness is 3.4m, and the average effective thickness is 3.5m. The average open-flow rate is 25.9-104m3/ d, the maximum open-flow rate reaches 231-104m3/ d (SD39-59A), and the lower Paleozoic gas reservoir shows a strong gas-producing capacity relative to the upper paleogas reservoir, which is of great significance to the improvement of the single-well production in the region. Although the development of the lower paleozoic gas reservoir has achieved some results, the whole development of the gas reservoir still faces some problems, including the partial formation distribution, the formation mechanism and the distribution rule of the upper and middle combination dolostones are not clear, the development characteristics of the effective reservoir are not clear, The control factors and their distribution law are still to be studied, and the prediction of the favorable area and the further development and planning of the gas reservoir are affected. Therefore, it is necessary to carry out the geological research to the ancient gas reservoir in this area, to deepen the fine understanding of the effective reservoir, to provide scientific and reasonable basis for the preparation of the whole development plan and the optimal deployment of the production capacity. Based on the research data of the eastern side of the Sulige area, through the detailed study of the 140 multi-port exploratory well and the development well in the work area, a large number of well logging data is used and the identification of the sign layer is used, and the small layers of the five sections of the study area are divided and compared with each other, and the error condition of each layer is counted. The stratigraphic correlation diagram is compiled and the distribution rule of the formation is clarified. Based on the observation and study of core, rock sheet and logging data, the study area belongs to the tidal flat phase, and two sub-phases and 8 micro-phases are identified, and a single-factor analysis and mapping method is used to prepare the sedimentary facies plan of each small layer. Based on the study of many main reservoir types in the study area, the main reservoir of Math5 is the dolomite which is formed by the quasi-cogenic dolomite and the buried dolomitization, and the grain of the main reservoir is coarse, and some of the grains reach the fine grain level and the intercrystalline pore is developed. MAV 6-10 is a favorable reservoir for the fine-fine-fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, It is believed that the diagenetic effect of the extensive development is dolomitization, paleokarst, cementation and metasomatism, recrystallization, pressure dissolution, etc., in which the effect of dolotization, dissolution and filling on the reservoir property is the most important. The main factors that influence the reservoir property are discussed from the aspects of sedimentary microfacies and lithology, structure and diagenesis, and the distribution rule of the effective reservoir is analyzed. The reservoir classification system is established according to the physical property parameters of the reservoir, the pore structure, the sedimentary microfacies and the comprehensive indexes such as the lithology, the combination type of the reservoir space and the diagenesis, and the reservoir classification and the comprehensive evaluation are carried out for each small layer according to the system. Considering the control factors of the development of the sedimentary facies, diagenesis, physical property and the ancient rock and the like, the beneficial area of each small layer of the study area is preferably calculated on the basis of the prediction of the beneficial area of each small layer.
【学位授予单位】：长江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13
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