大庆油田杏一～二区东部中块葡二组剩余油分布规律研究

发布时间：2018-04-14 16:13

  本文选题：沉积微相 + 储层特征　； 参考：《东北石油大学》2017年硕士论文

【摘要】：杏一~二区东部中块位于杏北开发区东北部,于1966年投入开发,目前具有采出程度高和综合含水高的“双高”特征。由于区块进行过一类油层三次采油,整体采出程度较高,水驱开发效果日益变差。因此,针对研究区勘探开发现状,对其葡二油层组剩余油分布规律进行研究,为后续研究该区的加密调整潜力和调整方式、有效改善该区水驱开发效果等油气开发工作提供了地质基础。本文用从研究区所取得的岩心观察资料、各项分析测试资料以及其它收集整理的资料为基础,以“旋回对比,分级控制,不同相带区别对待”为原则对研究区葡二油层组各小层开展精细地层划分对比工作。通过地区调研,结合所得资料和沉积背景,确定了葡二油层组的沉积体系和亚相、微相类型,建立了测井相模式,对各小层各井进行微相识别及预测,进而绘制各小层沉积微相平面展布图,研究各小层砂体钻遇率特征。分析储层物性特征、砂体有效厚度特征,从层内、层间和平面三个方面分析储层的非均质性。确定地质建模网格精度,建立研究区构造模型、沉积微相模型、储层属性等模型,进行模型粗化。进一步进行数值模拟,完成历史拟合。在油藏数值模拟结果的基础上,从平面和垂向两个方面分析剩余油分布规律。并结合已研究得出的沉积微相和储层非均质性等地质特征,对剩余油分布的控制因素进行分析。研究表明,平面上杏1-丁3-338、杏1-30-P50、杏1-40-P48、杏2-1-434等井附近,垂向上葡II82、葡II11、葡II12等小层是剩余油的主要富集区域。剩余油分布主要受到储层非均质性、沉积微相、断层以及砂岩厚度等地质因素的影响。
[Abstract]:The middle block in the east of Xingbei Development Zone is located in the northeast of Xingbei Development Zone. It was developed in 1966. At present, it has the characteristics of high extraction degree and high comprehensive water content.As a result of a class of oil reservoir three times oil recovery, the whole recovery degree is higher, the water drive development effect is getting worse day by day.Therefore, in view of the present situation of exploration and development in the study area, the distribution law of remaining oil in the Puer 2 oil formation is studied in order to further study the potentiality and mode of infilling adjustment in this area.It provides geological basis for oil and gas development such as improving the development effect of water flooding in this area.Based on the core observation data obtained from the study area, the analysis and test data and other data collected and collated, this paper is based on "cycle contrast, grading control,"According to the principle of different facies zones, fine stratigraphic classification and correlation are carried out for each sublayer of the Puer 2 formation in the study area.The sedimentary system, subfacies and microfacies types of the Puer 2 formation are determined through regional investigation, combined with the obtained data and sedimentary background. The logging facies model is established, and the microfacies identification and prediction are carried out for the wells in each sublayer.Furthermore, the plane layout of sedimentary microfacies of each layer is plotted, and the characteristics of drilling rate of sand bodies in each layer are studied.The characteristics of reservoir physical property and effective thickness of sand body are analyzed, and the heterogeneity of reservoir is analyzed from three aspects: inner layer, interlayer and plane.The mesh precision of geological modeling is determined, and the models of tectonic model, sedimentary microfacies model and reservoir attribute are established, and the model coarsening is carried out.Further numerical simulation is carried out to complete historical fitting.Based on the results of reservoir numerical simulation, the distribution law of remaining oil is analyzed from two aspects: plane and vertical.Combined with the geological characteristics of sedimentary microfacies and reservoir heterogeneity, the controlling factors of remaining oil distribution were analyzed.The results show that the horizontal layers of Apricot 1-3-338, Apricot 1-30-P50, Apricot 1-40-P48, Apricot 2-1-434 are the main enrichment areas of residual oil.The remaining oil distribution is mainly affected by reservoir heterogeneity, sedimentary microfacies, fault and sandstone thickness.
【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】：TE327;P618.13
，

本文编号：1750065