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本文首先通过对11口取芯井的详细解剖,确立了研究层段的层序地层格架划分方案,进而对研究区800多口井进行了精细划分对比,进行了不同类型河道所处环境的微相识别与划分,并建立了研究区的相模式。结合沉积环境从宏观上分析了不同类型河道的演化规律。在此基础之上,对不同类型储层建筑结构进行了分析。随着油田开发进入高含水后期,产量递减加快,采油速度逐渐降低。研究区萨三油层组平面上和纵向上由于受沉积特征的影响,非均质性比较严重。分层测试资料表明:原有的井网对薄油层及表外储层适应性差,水驱控制程度低,因此导致部分油层未动用或动用差。为该区块调整挖潜,本文根据研究区的地质特征,充分利用取心井资料和地球物理测井资料,采用宏观和微观相结合的方法对大庆萨尔图油田SⅢ油层组的储层非均质特征进行了定性和定量描述研究,从油藏精细地质研究入手,采用动、静态结合,多学科综合,从多个方面对研究区沉积微相及剩余油分布特征进行了研究。研究区精细油藏描述、剩余油分布特征的研究,为加密挖潜、提高采收率提供了科学的依据。
In this paper, first of all, through the detailed dissection of 11 coring wells, the stratigraphic sequence stratigraphic division scheme of the research interval has been established. Then more than 800 wells in the study area have been subdivided and compared, and different types of corridors have been studied Microfacies identification and classification, and established the phase pattern of the study area. With the sedimentary environment, the evolution of different types of channels is analyzed macroscopically. On this basis, different types of reservoir building structure were analyzed. With the development of oilfields entering the later stage of high water cut, the production decreases rapidly and the oil production rate gradually decreases. There is a serious heterogeneity in the plane and the longitudinal direction of the Sa-San reservoir in the study area due to sedimentary characteristics. Stratified test data show that the original well pattern has poor adaptability to thin oil reservoirs and off-balance sheet reservoirs and low degree of water-flooding control, resulting in some unused or poorly utilized reservoirs. Based on the geological characteristics of the study area, taking full advantage of coring well data and geophysical well logging data, a combination of macroscopical and microscopic methods is applied to investigate the potential of non-uniform reservoir in SⅢ oil layer of Daqing Saertu Oilfield Qualitative and quantitative description of qualitative and quantitative description of the study, starting from the reservoir fine geology, the combination of dynamic and static, multidisciplinary synthesis, from many aspects of sedimentary microfacies and remaining oil distribution characteristics were studied. The study of fine reservoir description and remaining oil distribution in the study area provides a scientific basis for encryption and tapping potential and enhanced oil recovery.