【作者】 刘伟；

【导师】 戴胜群；

【作者基本信息】 长江大学 ， 矿物学、岩石学、矿床学， 2013， 硕士

【摘要】 随着全球油气勘探开发和地质理论研究的不断深人,油气储层研究日益受到人们的重视。如近年来,AAPG年会已把储层研究作为油气盆地研究中的主要方向和热点之一。储层地质学的理念、新方法不断产生。储层沉积学研究日益由宏观向微观发展,由理论沉积学向应用沉积学发展,对储层的描述和预测也日益从定性向定量发展。东庄油田位于河南省新野县沙堰镇东庄村一带,构造位置在南襄盆地南阳凹陷南部东庄次凹陷中心,是一个被断层复杂化了的背斜构造。油田发现以来,未开展系统的基础地质研究,油藏构造、储层展布、油气层分布规律认识不清；未形成完善的注采井网,目前尚处于试采、试注阶段,低产低能井采取捞油方式生产,储量水驱动用程度低。近几年来,加大了该油田的调整力度,完钻井数增加至52口,需要深化油藏构造认识；研究各沉积时间单元的沉积微相,刻画储集层分布和非均质特征；进行注采对应分析,搞好注采调整,改善注水状况,恢复地层能量,高效开发油藏。东压油田地层层序由上到下分别是第四系平原组、新近系上寺组、古近系核桃园组、大仓房组。核二段、核三段是该地区的主要含油层位,岩性为深灰色泥岩、页岩与浅灰色细砂岩,粉砂岩不等厚互层,局部发育含砾砂岩。本次以沉积学理论为指导,根据区域沉积背景,借鉴前人研究成果,对全区52口井进行小层划分。地层划分从关键井地层分析入手,确定核二段、核三段各级沉积旋回；选择骨干连井地层对比剖面,在沉积旋回控制下进行骨干剖面井地层的细分与对比,划分过程中考虑单砂层间隔层的稳定性,并尽可能划分到单砂体级别；骨干剖面井闭合以骨干剖面井为标准,进行全区井对比,最终达到全区地层对比的闭合。核桃园组储层主要为湖相三角洲沉积,本次研究以核桃园组区域沉积背景为基础,在湖相三角洲沉积模式指导下,通过关键井研究,进行单井相分析,建立沉积微相知识库,对全部井进行小层微相划分。通过剖面沉积微相分析,编制各小层沉积微相分布图,分析本区湖相三角洲沉积演化和相带展布规律。利用沉积微相研究成果,分析有利相带展布。利用岩芯化验分析所获得的孔隙度、渗透率、饱和度、压汞资料、润湿性、敏感性和相渗资料,流体分析资料,PVT实验资料,开展储层物性研究,研究储层参数变化特征,研究储层微观孔隙特征,研究孔隙类型与孔隙组合、孔喉分布特征、粘土矿物特征等。储层宏观非均质性研究以沉积微相时空演化特征和沉积相模式为指导,依据储层参数处理成果,研究层内非均质性、层间非均质性、平面非均质性,分析研究砂体、储层物性及主力油砂体隔层等在三维空间上的展布特征,并根据动态资料验证其正确性；微观非均质性主要指孔隙和喉道非均质性,以及岩石润湿性影响形成的流体非均质性,研究中综合应用薄片、铸体、电镜、毛管压力等化验分析资料,利用地质统计学等方法全面分析,研究该区储层的微观特征,并进行描述与分类评价。根据上述研究成果,选用储层物性、砂岩钻遇率、砂岩厚度、连通性等参数,并进行储层综合分类评价。综合测井曲线特征及试油、录井和化验分析资料,开展东庄油田古近系核桃园组储层四性关系研究。选取关键井目的层储层参数,与测井记录形成最佳转换关系,建立东庄油田的岩性、物性和有效厚度参数解释模型,进行多井数字处理与解释,重新处理并建立油气水层解释模型或划分标准,利用软件对东庄油田52口井重新进行测井解释,并研究油气在平面及纵向上的变化特点,搞清油气在纵、平面上的分布规律,编制含油小层油层厚度等值线图。东庄油田构造复杂、储层砂体变化快、非均质性强。目前油田油水井数比大,注水井点少,现有注水井与油井对应性差,油井受效状况差,多数油井处于天然能量开采状态,地层能量低,油井产量低,油田整体处于低产低效开发状态。通过本次储层研究,搞清楚储层发育规律。更多还原

【Abstract】 With the continues depth of the global oil and gas exploration and geological theory research, the study of oil and gas reservoirs increasing attention has been paid. Such as in recent years, the AAPG Annual Meeting has taken reservoir studies as the main directions and one of the hot spots in the study of oil and gas basins. The reservoir geology ideas, new methods continue to produce.Reservoir sedimentology increasingly from macro to micro, from theory sedimentology to the development of applied sedimentology, reservoir description and prediction are also increasingly from qualitative to quantitative development.Dong Zhuang oilfield located in the territory of the Dongzhuang village,Shayan township of Xinye County, Henan Province, structural position in center of the Dongzhuang secondary depression of the southern Nanyang depression which located in Nanxiang Basin, is a complicated fault anticlinal structure. Since the discovery of oil fields, did not carry out the system on the basis of geological research, reservoir structure, reservoir distribution, the law of the distribution of oil and gas layer clear understanding; do not form a perfect injection patterns, is still in the stage of trial mining, injection test, low-yielding low-energy well take fishing oil production, reserves of water driving a low degree. In recent years, increased efforts to adjust in the field, drilled number increased to52, the need to deepen the understanding of reservoir structure; the sedimentary microfacies study of the deposition time unit, characterize reservoir distribution and heterogeneity characteristics; injection and production correspondence analysis, do a good job of injection and adjustment, improve water injection conditions, restore the formation energy, efficient development of the reservoir.The stratigraphic sequence of Dong Zhuang oilfield from top to bottom are the Pingyuan formation of Quaternary, the Shangsi formation of Neogene, the Hetaoyuan and Dacang formation of Paleogene. Eh₂and Eh₃is the region’s major oil-bearing strata, lithology is dark gray mudstone, shale and light gray fine-grained sandstone, siltstone unequal thickness interbedded, pebbly sandstone locally developed. The deposition theory as a guide, according to the regional depositional setting, drawing on the results of previous studies, small layer is divided into52wells in the region. Stratigraphic division analyzes the key hole formation, to determine the sedimentary cycles of the Eh₂and Eh₃at all levels; to select backbone even well stratigraphic correlation profile, The backbone section hole formation segmentation and contrast under the control of the sedimentary cycle, consider the stability of the single layer of sand interval in the framing process, and, as far as possible, be divided into single sand body level; the backbone profile well closed to the backbone profile well as the standard, go to the region’s well correlation, and ultimately achieve the closure of the region stratigraphic correlation. The reservoir of Hetaoyuan formation mainly lacustrine delta deposition, the basis for the study of the regional depositional setting of Hetaoyuan formation, under the guidance of the lacustrine delta depositional model, through key wells research, single well analysis, establishment of the knowledge of sedimentary microfacies library, small layer of microfacies to all the wells. A section deposition microfacies analysis, preparation of sedimentary microfacies maps of every small layers, analysis of the area lacustrine delta sedimentary evolution and facies belts law. Use the sedimentary microfacies research, analysis of favorable facies distribution. The use of core laboratory analysis for porosity, permeability, saturation, mercury data, wettability, sensitivity and relative permeability, fluid analysis data, PVT experimental data, and provide a reservoir properties, research reservoir parameters change characteristics, research reservoir microscopic pore characteristics, study pore types and pore combination, pore throat distribution characteristics, clay mineral characteristics. Reservoir macroscopic heterogeneity study take the sedimentary microfacies temporal evolution of features and sedimentary facies model as a guide, based on the processing results of reservoir parameters, Research layer heterogeneity, heterogeneity in the layer plane heterogeneity, analysis the distribution characteristics of sand bodies, reservoir properties and the main oil sands compartment on the three-dimensional space, and in accordance with dynamic data to verify its correctness; microscopic heterogeneity mainly refers to the heterogeneity of the pore and throat, as well as fluid heterogeneity formed by rock wettability, the study integrated application laboratory analysis data of sheet, cast, electron microscopy, capillary pressure, use geostatistical methods to comprehensive analysis, and study the microscopic characteristics of the reservoir in the area. According to the research results, the choice of the parameters of the reservoir properties, sandstone drilling rate, sandstone thickness, connectivity, and conduct the reservoir classification and evaluation.Integrated logging curve characteristics and test oil, logging and laboratory analysis data to carry out the reservoir four relations of the Hetaoyuan of Paleogene of Dong Zhuang oilfield. Select reservoir parameters of the purpose layer of the key wells, formed the best conversion relationship with logs, the establishment of the Dong Zhuang oilfield lithology, physical properties and effective thickness parameter interpretation model, the digital processing and interpretation of the multi-well, reprocessed and the establishment of the explanatory model or criteria for the classification of the oil-gas-water layer, the use of software to re-log interpretation the Dongzhuang Oilfield52wells, and to study the changes in the characteristics of the oil and gas in the plane and vertical, find out law of the oil and gas in the vertical plane distribution, the preparation of oil layer reservoir thickness contour map.Dong Zhuang oilfield complex structure, reservoir sand body is changing fast, strong heterogeneity. At present, the number of oil wells larger than the number of points of injection wells, existing injection wells and oil wells corresponding to poor, oil wells in poor condition by the effect, most of the oil wells in the state of exploitation of natural energy, the formation energy is low, low oil production, oil field as a whole is inefficient business the development of the state. Through the reservoir study to figure out the laws of reservoir development.更多还原