轮南低凸起气洗相分馏作用的拉曼光谱响应  

Response of Raman spectroscopy characteristic of gas washing in Lunnan low-uplift

作　　者：吴楠[1,2] 蔡忠贤[2,3] 杨海军 刘显凤[1] 

机构地区：[1]长江大学地球科学学院,湖北荆州434023 [2]中国地质大学构造与油气资源教育部重点实验室,湖北武汉430074 [3]中国地质大学资源学院,湖北武汉430074 [4]中国石油有限责任公司塔里木油田勘探开发研究院,新疆库尔勒841000

出　　处：《中国石油大学学报（自然科学版）》2012年第4期39-44,共6页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家“973”计划项目(2012CB214804)

摘　　要：利用流体包裹体均一温度测试技术、包裹体组分拉曼光谱分析技术对轮南低凸起气洗相分馏作用的拉曼光谱响应进行研究。结果表明:喜山期过量干气对轮南地区奥陶系整装油藏发生大规模的侵入与冲刷诱发深度气洗相分馏改造,且气洗相分馏强度自东向西递减,边界位于LG17井以及LG100井区一线;分布于东部斜坡带、断垒带东段以及中部平台区东缘的高温包裹体样品(喜山期捕获)的拉曼光谱特征表现出强烈的甲烷优势,包裹体成分为干气,直接反映出喜山期过量干气的强势侵入;在距气源区较远的西部斜坡带,LG40井及LG42井包裹体的拉曼光谱不仅呈现出'双峰形态'的湿气特征,亦同样检测到具强烈甲烷优势的干气特征,西部斜坡带地区在喜山期亦曾遭受干气的侵入而诱发气洗相分馏作用,拉曼光谱的测试数据有效地扩延了气洗相分馏的范围。The response of Raman spectroscopy characteristic of gas washing in Lunnan area was discussed by analyzing the homogenization temperature and the inclusion composition. The results show that since the Himalaya movement, the original accumulation in Lunnan area has experienced an intense invasion by the dry gas, triggering a deep revolution process of phase fractionation. The calculation results of relative depletion of n-alkanes of the oil show that the intensity of the gas washing decreases westward and the boundary of phase fraetionation locates along the well LG17 and LG100. The inclusion samples with high homogenization temperature locating in the eastern slope, east of the horst belt and the middle platform show an extreme priority of methane on composition, which indicates an injection by a mount of dry gas. The samples in the western slope that is far away from the gas source sag such as well LG40 and LG42 not only display a ＂double peak＂ shape of the indication of the wet gas, but also show an extreme priority of methane, which proves a dry gas invasion happened in the western slope, and the analyzing of laser Raman spectrum has extended the region of gas washing effectively.

关 键 词：轮南低凸起 气洗作用 拉曼光谱 包裹体组分 

分 类 号：TE122.1[石油与天然气工程—油气勘探]