镇原油区油藏富集规律研究

发布时间：2018-06-22 11:05

  本文选题：镇原地区 + 沉积体系　； 参考：《西安石油大学》2015年硕士论文

【摘要】：镇原油区位于鄂尔多斯盆地西南部镇原油区,是多油层复合的油气富集区,在延8、延9、延10、长3、长4+5、长8分别获得工业油流。从多年勘探开发情况来看,长3油藏具有资源潜力大、油藏分布零散、出油井点多、单井产量高等特点。但镇原油区勘探程度较低,随着产建规模的不断扩大,后备资源难以满足镇原油田快速发展的矛盾日益突出。本文针对以上矛盾,重点从古地貌特征、沉积相特征、砂体展布特征、储层特征、油藏的富集规律等方面进行论证,建立储层分类标准,筛选长3油层组有利建产区。结合前人研究的成果,从面临的问题、研究的主要任务、构造、沉积相和储层入手,应用多学科理论,在与邻区对比的基础上,结合现代测试技术方法,对研究区沉积相、储层和成藏主控因素进行了系统地研究,进一步揭示了镇原油区的油气成藏规律,建立了油气成藏模式,确定了进一步勘探的优选目标。研究表明镇原油区长3油层组为三角洲沉积体系,发育三角洲平原亚相,分流河道是最有利的微相,且平面上砂体呈南西-东北向展布;镇原油区油气运移疏导体系为断裂、裂缝、裂缝-渗透性砂岩和干酪根网络组合。此外,油气以垂向运移为主,油气成藏具“多元控油,鼻状构造成藏”的运聚模式。通过建立长3油藏分类评价标准,优选出Ⅰ类有利建产区3个,优选出Ⅱ类有利建产区7个,优选出Ⅲ类有利建产区1个。
[Abstract]:Zhenyuan oil area is located in the town crude oil area of southwestern Ordos Basin. It is a complex oil and gas accumulation area with multiple oil layers. Industrial oil flows are obtained in Yan8, Y9, Y10, Chang3, Chang 45 and Chang8, respectively. According to the exploration and development for many years, Chang 3 reservoir has the characteristics of large potential, scattered reservoir distribution, many oil well points and high single well production. However, the exploration level in Zhenyuan oil area is low. With the expansion of production and construction scale, the contradiction that reserve resources can not meet the rapid development of Zhenyuan oil field is becoming increasingly prominent. In view of the above contradictions, this paper focuses on the demonstration of paleogeomorphic features, sedimentary facies characteristics, sandbody distribution characteristics, reservoir enrichment rules, and so on, establishes the reservoir classification standard, and screens the Chang 3 reservoir formation to establish favorable production areas. Combining with the achievements of previous studies, starting with the problems, the main task of the study, the structure, sedimentary facies and reservoir, applying the multi-disciplinary theory, on the basis of contrast with the adjacent area, combining with the modern testing technique, the sedimentary facies in the study area are analyzed. The reservoir and the main controlling factors of the reservoir formation are studied systematically, which further reveals the oil and gas accumulation law in the Zhen crude oil area, establishes the oil and gas accumulation model, and determines the optimal selection target for further exploration. The results show that the Chang 3 oil formation in Zhen crude oil area is a delta sedimentary system with delta plain subfacies developed, distributary channel is the most favorable microfacies, and the sand bodies on the plane are distributed in the south west to northeast direction, and the oil and gas migration and dredging system in the Zhenyuan oil area is a fault. Fracture, fracture-permeability sandstone and kerogen network combination. In addition, the migration of oil and gas is mainly vertical, and the accumulation pattern of oil and gas accumulation is "multiple control of oil and formation of nasal structure". By establishing the criteria of classification and evaluation of Chang 3 reservoir, 3 favorable construction areas of class I, 7 favorable areas of construction and 1 favorable production area of class 鈪，

本文编号：2052630