大民屯凹陷S257块录井资料含油性二次评价研究

发布时间：2018-02-27 17:22

本文关键词： 大民屯凹陷沉积构造录井技术油藏解释二次评价　出处：《东北石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：由于辽河油田的油品性质多样,储层物性不好,准确识别含油气性难度较大,且在油田勘探开发初期,鉴于录井、测井等技术手段落后、储层评价方法有限,均造成部分油层判别不准确,直接影响到后期的勘探开发工作。本研究是在沉积学、储层地质学等理论指导下,结合录井、测井、地震解释等资料,分析了辽河坳陷大民屯凹陷S257块沙四段的储层特征,该区块目的层主要发育近岸水下扇相沉积,岩石类型以混合砂岩、长石质岩屑砂岩为主,结构成熟度、成分成熟度均较低;储层原生粒间孔隙不发育,物性较差,属于低孔低渗储层。此外,S257块油藏沙四段原油性质属高凝油。在查明储层地质特征基础上,运用综合参数法、含油饱和度法、最小二乘法、相关系数法等多种方法,建立了不同品质原油的地化录井资料解释判别标准及图版;确定了核磁共振T2弛豫谱资料的油层、水层、同层及干层的判别标准,并可根据图谱形状进一步落实储层特点和含油性。针对研究区高凝油油藏特征,应用地化录井技术,对老井岩心、岩屑、井壁取心等样品,进行了含油性二次评价,建议重新试油304层/29口井;已试油54层/10口井,累计油层厚度261.6m,低产油层厚度72.8m。将录井资料二次评价技术应用于储量计算中,可提高对油层的识别精度,使计算储量增加。
[Abstract]:Because of the variety of oil products and poor physical properties of reservoir, it is difficult to accurately identify oil-bearing gas in Liaohe Oilfield. In the early stage of exploration and development of oil field, reservoir evaluation methods are limited in view of the backwardness of logging, logging and other technical means. This study is based on the theory of sedimentology, reservoir geology and so on, combined with the data of logging, logging, seismic interpretation, etc. The reservoir characteristics of the fourth member of S257 block in the Damingtun sag of Liaohe depression are analyzed. The target layer of the block mainly develops nearshore subaqueous fan facies sedimentary. The rock types are mixed sandstone, feldspathic lithoclastic sandstone, low structural maturity and low compositional maturity. Reservoir primary intergranular pore is not developed, physical property is poor, it belongs to low porosity and low permeability reservoir. In addition, the crude oil property of the fourth member of Shahejie formation in Block S257 belongs to high condensate oil. On the basis of identifying the geological characteristics of reservoir, the comprehensive parameter method and oil saturation method are used. Several methods, such as least square method and correlation coefficient method, have been established to distinguish the geochemical logging data of crude oil of different quality, and the discriminant standards of oil layer, water layer, same layer and dry layer of NMR T2 relaxation spectrum data have been determined. In accordance with the characteristics of high condensable oil reservoir in the study area, geochemical logging technology is used to evaluate the oil content of old well core, cuttings, coring of well wall, and so on, in view of the characteristics of high condensable oil reservoir in the study area, which can be further implemented according to the shape of the map, and the secondary evaluation of oil content is carried out on the basis of the geochemical logging technology. It is suggested that 304 layers / 29 wells should be tested again, 54 / 10 wells have been tested, the accumulative thickness of oil layer is 261.6 m, and the thickness of low production reservoir is 72.8 m. The application of the second evaluation technology of logging data to the calculation of reserves can improve the recognition accuracy of reservoir and increase the calculated reserves.
【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】：TE142;P618.13

【相似文献】