志丹永宁—稍园子地区长2油藏富集规律研究

发布时间：2018-06-16 14:21

本文选题：志丹地区 + 长2油层组　；参考：《西安石油大学》2015年硕士论文

【摘要】：稍园子油田行政区划隶属于陕西省志丹县,位于县城西略偏北的纸坊乡,距县城直线距离约15km,夹于周河和洛河之间。研究范围东起韩老湾、庙崾岘,西止四壕崾岘、任寨子一带,南接庙湾、赵庄,北邻白银河、稍园子,面积约1 80km2。论文所涉及的研究区域具体方位见附图1—1,面积约36km2。鄂尔多斯盆地稍园子地区三叠系延长组具有良好的生、储、盖组合,发育良好的岩性圈闭；延长组湖岸线的变迁影响着稍园子地区延长组储集层的发育,砂岩发育带严格控制着油气的分布和好坏,三角洲平原分流河道砂体、三角洲前缘河口坝、水下分流河道砂体是本区油气聚集的有利储集体。稍园子地区三叠系延长组长2油层是本区的主力油层,长6、长3为本区的辅助油层。延长组长6油藏类型主要为砂岩透镜体油藏、砂岩上倾尖灭油藏和上倾致密砂岩遮挡油藏,长2、长3油藏类型主要为砂岩上倾尖灭油藏、上倾方向致密砂岩遮挡油藏和差异压实构造—岩性油藏。本次研究在综合前人研究成果和大量基础资料的前提下,应用沉积学、储层地质学地球物理测井等理论方法,立足鄂尔多斯盆地中生界区域地质背景,着眼于稍园子地区长2油藏富集规律研究,全面地分析长2油层的地层、沉积体系及储层特征。以此为基础,寻找控制研究区长2油层油气富集的主控因素。重点研究该区延长组长2油层组,对研究区长2的沉积相、储层及成藏因素进行分析。搞清该区长2油藏富集规律,预测有利区,为评价、优选勘探目标提供依据。通过综合研究分析,本次长2油藏储量计算结果为2327×104t,储量丰度为56.6×104t/km2,属中等规模低丰度油田,同时计算得可采储量为279.2x 104t,剩余可采储量为269x 104t,经深入分析论证表明稍园子油田为中浅层、低产、低丰度的中型油田。
[Abstract]:The administrative division of Xiaoyuanzi Oilfield belongs to Zhidan County of Shaanxi Province, which is located in Zhifang Township in the west and slightly north of the county seat. The distance from the county seat is about 15km, between the Zhou River and the Luohe River. The scope of the study from Han Lao Wan, Miao Xian, Xizhi four trenches to Xian, Renzhaizi area, south of Miaowan, Zhao Zhuang, north adjacent to the White Galaxy, slightly garden, an area of about 180 km2. The specific azimuth of the research area involved in this paper is shown in figure 1-1, with an area of about 36 km ~ 2. The Yanchang formation of Triassic in Zhaoyuanzi area of Ordos Basin has good lithologic traps with good assemblage, reservoir and cap assemblage, and the changes of lakeshore line in Yanchang formation affect the development of reservoir in Yanchang formation in Zhaoyuanzi area. The distribution and quality of oil and gas are strictly controlled by sandstone development zone. The distributary channel sand body in delta plain, delta front estuary dam and underwater distributary channel sand body are favorable reservoir bodies for hydrocarbon accumulation in this area. The main reservoir of this area is Chang 2 of Triassic Yanchang formation in Xuanyuanzi area. Chang 6 and Chang 3 are auxiliary reservoirs in this area. Yanchang 6 reservoir is mainly composed of sandstone lens reservoir, sandstone updip tipping out reservoir and updip tight sandstone blocking reservoir, Chang 2 and Chang 3 reservoirs are mainly sandstone updip tipping out reservoirs. Updip tight sandstone block reservoir and differential compaction structure-lithologic reservoir. On the premise of synthesizing the previous research results and a great deal of basic data, this study is based on the Mesozoic regional geological background of the Ordos Basin by applying the theories of sedimentology, reservoir geology, geophysical logging and so on. Based on the study of the enrichment law of Chang 2 reservoir in the area of Xuoyuan Zi, the formation, sedimentary system and reservoir characteristics of Chang 2 reservoir are comprehensively analyzed. On the basis of this, the main controlling factors of oil and gas enrichment in Chang2 reservoir in the study area are sought. The formation of Chang 2 in Yanchang formation is studied, and the sedimentary facies, reservoir and reservoir forming factors of Chang 2 in the study area are analyzed. The enrichment law of Chang 2 reservoir in this area is clear and the favorable area is predicted, which provides the basis for evaluation and optimal selection of exploration targets. Through comprehensive study and analysis, the result of reserve calculation of Chang2 reservoir is 2327 脳 10 ~ 4t, reserves abundance is 56.6 脳 10 ~ 4t / km ~ 2, which belongs to medium scale low abundance oil field. Meanwhile, the recoverable reserves are 279.2x 104t and the remaining recoverable reserves are 269x104t. The deep analysis and demonstration show that the Xianyuanzi oilfield is a medium oil field with middle and shallow layers, low production and low abundance.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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