光谱学与光谱分析, 2016, 36 (12): 3926, 网络出版: 2016-12-30  

利用显微红外光谱技术表征非均质油气储层裂缝特征——以任丘潜山蓟县系雾迷山组碳酸盐岩储层为例

Characterizing Fracture Characteristics of Heterogeneous Oil and Gas Reservoir by Using Microscopic Infrared Spectroscopy Technique——Taking Carbonate Reservoir of the Wumishan Formation of Jixian System in Renqiu Burried Hill as an Example
作者单位
1 西南石油大学油气藏地质及开发工程国家重点实验室, 四川 成都 610500
2 中国石化胜利油田分公司油气勘探管理中心, 山东 东营 257000
3 中国石油大学(华东)储运与建筑工程学院, 山东 青岛 266580
4 中国石油天然气管道局, 河北 廊坊 065000
摘要
油气储层裂缝既是重要的储油空间, 又是油气运移的主要通道, 因此, 裂缝表征非常重要。 然而储层岩石具有强烈的非均质性, 如何精确表征非均质储层裂缝是需要亟待解决的问题。 利用显微红外光谱技术可以对矿物分子的光谱曲线进行分析, 得到不同的峰值特征, 精确获得岩石介质成分、 裂缝的大小、 裂缝充填物特性等。 以任丘潜山型碳酸盐岩非均质储层为例, 基于显微红外光谱技术, 通过分析岩心光片显微红外成像光谱图和不同特征区域的光谱曲线, 获得了目标样品岩石介质的物化特性和空间分布特征, 预测了裂缝可能发育的区域, 并分析了裂缝的有效性。 结果表明, 岩心样品主要介质为白云岩; 储层裂缝中含有烃类有机物和盐水包裹体, 它们主要赋存于白云岩介质中; 裂缝充填物中盐水包裹体所占比例为51.7%, 烷烃有机物所占比例为26.0%, 裂缝发育从岩心样品左上方区域延伸至右下方区域, 表明该延伸区域可能是流体运移的通道; 盐水包裹体会阻碍油气的运移, 导致裂缝的渗透率降低; 实验测得岩石裂缝宽度为1~1.5 mm, 属于大裂缝, 油气可以顺利通过, 因此, 裂缝的有效性好。 研究表明利用显微红外光谱成像技术表征非均质储层裂缝特征是切实可行的, 为非均质油气储层精确表征提供了一种新方法。
Abstract
Oil and gas reservoir fracture is not only the important reservoir space, but also the main passage of the oil and gas migration. Therefore, the characterization of fracture is of great importance. However, reservoir rocks have strong heterogeneity, how to characterize heterogeneous reservoir fracture accurately is an urgent problem to be solved. Microscopic infrared spectroscopy imaging technique can be used to analyze spectral curve of the mineral molecules, different peak characteristics were got, and rock medium composition, the size of the rock fracture, and fracture filler properties and other characteristics were obtained accurately. In this work, carbonate heterogeneous reservoir of Renqiu buried hill was taken as an example, based on the microscopic infrared spectroscopy imaging technique, by the analysis of core sample infrared imaging spectrogram and spectral curves of different characteristic regions, the physicochemical characteristics of the target sample and spatial distribution of the rock medium were obtained, the regions where rock fracture maybe occurred were predicted and the effectiveness of the fractures was analyzed. The results show that the main medium of rock sample is dolomite. The rock fractures contain hydrocarbon organic and salt-water inclusion, which mainly exist in dolomite medium. The proportion of salt-water inclusion is 51.7%, and that of alkane organic matter is 26.0% in the fracture filler. The fracutres extend from the upper left region of core sample to the lower right region, which shows that the extended region of the core sample may be the passage of fluid migration. The salt-water inclusions can impede the migration of oil and gas, resulting in the decrease of fractures permeability. The experimental results show that the width of fractures is 1~1.5 mm, which belongs to large fracture, oil and gas can pass the fractures smoothly, therefore, the effectiveness of the fracture is good. The results showed that it is feasible to characterize the fracture of heterogeneous reservoir by means of microscopic infrared spectroscopy imaging technique, and it provides a new method for the accurate characterization of the fracture of heterogeneous reservoir.

周汉国, 郭建春, 李静, 刘思萌, 彭成乐, 侯江朋. 利用显微红外光谱技术表征非均质油气储层裂缝特征——以任丘潜山蓟县系雾迷山组碳酸盐岩储层为例[J]. 光谱学与光谱分析, 2016, 36(12): 3926. ZHOU Han-guo, GUO Jian-chun, LI Jing, LIU Si-meng, PENG Cheng-le, HOU Jiang-peng. Characterizing Fracture Characteristics of Heterogeneous Oil and Gas Reservoir by Using Microscopic Infrared Spectroscopy Technique——Taking Carbonate Reservoir of the Wumishan Formation of Jixian System in Renqiu Burried Hill as an Example[J]. Spectroscopy and Spectral Analysis, 2016, 36(12): 3926.

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