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对石油包裹体研究和应用的几点认识 总被引：5，自引：0，他引：5
孙玉梅 《矿物岩石地球化学通报》2006,25(1):29-32
本文总结了对石油包裹体研究和应用的几点认识,包括流体包裹体岩相分析、显微温度分析、油包裹体丰度统计和原始样品采集及制备。强调流体包裹体岩相分析是直观而有效的分析技术,其结果可以提供油气是否运移、运移期次、相对早晚及每一期相对数量和油气大致特征等资料,也是其他有关包裹体研究的基础。显微温度测试必须以油气包裹体鉴定为基础,单纯应用均一温度划分油气运移期次是不合适的。油包裹体丰度是确定古油藏的重要参数,统计结果受多种因素影响。石油包裹体分析是研究性较强的方法,研究人员参与到分析鉴定工作中方能取得较好的研究成果。 相似文献
2.
Current oil saturation in the Moxizhuang (莫西庄) Oil Field in central Janggar (准噶尔) basin was evaluated by logging interpretation and measured on core samples, and the paleo-oil saturation in both the pay zones and water zones was investigated by graln-containing-oil inclusion (GOI) analysis.The pay zones in this field have low oil saturation and display low resistivity and small contrast between pay zones and water zones, and are classified as low-porosity, low oil saturation, and low resistivity reservoirs. Both the current low oil-saturation pay zones and the water zones above 4 365 m have high GOI values (up to 38%), suggesting high paleo-oil saturation. The significant difference between current oil saturation from both logging interpretation and core sample measurement and paleo-oil saturation indicated by GOI analysis suggests that this low oil-saturation field evolved from a high oil-saturation pool. Lateral re-migration and spill of formally trapped oil owing to changes in structural configuration since Neogene was the most plausible mechanism for oil loss in the Moxizhuang Oil Field.The combined effects of differential accumulation in the charge phase and the differential re-migration and spill of accumulated oil in Neogene are responsible for the complicated correlation between residual oil saturation and porosity/permeability of the reservoir sandstones and the distribution of low oil-saturation pay zones and paleo-oil zones (current water zones). 相似文献
3.
The identification of reservoir oil–gas–water layers is a fundamental task in petroleum exploration and exploitation, but is difficult, especially in cases of complex hydrocarbon migration and accumulation. In such cases, hydrocarbon remigration and dysmigration take place very commonly, leading to the presence of residual or paleo-oil accumulations and layers, which cannot be easily identified or misinterpreted as oil layers by conventional logging and geophysical data. In this paper, based on a case study in the Luxi area of the central Junggar Basin, NW China, we seek to characterize such layers in terms of organic geochemistry. We suggest specific indicator parameters of organic geochemistry such as the chloroform bitumen content of reservoir extracts, which is usually >1.0% in oil layers. We explore the application of grains containing oil inclusions (GOI) (the ratio of mineral grains containing oil inclusions to the total number of mineral grains) for the identification of oil–gas–water layers in the Junggar Basin for the first time; this method has been used elsewhere. The maximum GOI values for the oil layers, oil–water layers, water layers and dry layers are >11%, 7%–11%, 6%–7% and <6%, respectively. In addition, gas layers and heavy-oil layers that are difficult to identify by conventional organic geochemical parameters were identified using biomarkers. The typical characteristics of the soluble reservoir bitumen in the gas layers include a much greater abundance of tricyclic terpanes (two times in general) relative to pentacyclic terpanes and a tricyclic terpane distribution of C20 > C21 > C23. In contrast, the typical characteristic of the heavy-oil layers is the presence of 25-norhopanes in reservoir bitumen extracts. These specific indicators can be applied in the Junggar Basin and in similar settings elsewhere. 相似文献
4.
柴达木盆地北缘地区油气储层中流体包裹体特征及成藏期研究 总被引：1，自引：0，他引：1
根据流体包裹体的透射光和荧光镜下观察、包裹体均一温度及含油包裹体丰度（GOI）分析,对柴达木盆地北缘（柴北缘）地区南八仙、马北1号构造古近系、新近系油气储层样品中流体包裹体特征及油气成藏期进行了研究。柴北缘地区流体包裹体较为发育,存在盐水溶液包裹体和有机包裹体,主要分布在石英裂隙、次生加大边及胶结物中,但个体一般较小,主要为5～10μm。含油包裹体丰度GOI值较低,绝大多数样品GOI值分布在2．0％～10．5％之间,约40％样品的GOI值超过5％。包裹体均—温度在不同油气储层样品中差异较大,说明这些包裹体可能是在不同时期形成的。依据包裹体均—温度的实测结果,结合沉积埋藏-热演化史的资料,认为柴北缘地区南八仙构造和马北1号构造均经历了两期油气充注成藏,前者油气充注时间为N1-N2^1沉积期、N2^2-N2^3沉积期,后者油气充注时间为N1沉积期、N1末-N2沉积期。 相似文献
5.
在准噶尔盆地莫索湾地区选取了5口具有不同油气显示级别的典型探井,通过对48块岩心样品作精细的储层油气包裹体GOI组成分析,尝试探讨了在复杂油气充注情况下,叠合盆地油气包裹体GOI组成的成因。结果表明,含油气流体的充注强度是主因。但由于油气成藏的多期复合、油气水界面的多期变迁,决定了我们在研究过程中不可以直接借鉴文献中提出的1%和5%等指标来判断油气水层,而是应该结合地质背景,首先仔细分析其成因,再深入讨论应用。文中利用GOI对莫索湾地区的油气运移进行了讨论,取得了良好效果,表明其在叠合盆地油气运移研究中具有一定应用前景。 相似文献
6.
应用烃类流体包裹体GOI和成分研究凝析气藏成藏过程：以准噶尔盆地莫索湾地区为例 总被引：1，自引：1，他引：1
The Grains containing Oil Inclusions(GOI)data in currently gas/condensate-beating Jurassic and Cretaceous reservoir sandstones of Well Pen 5(the Mosuowan area of central Junggar Basin,NW China)are generally greater than the empirical threshold line of 5%.This is consistent with the gas-condensate section originally containing a palaeo-oil column.In order to assess the origin of the oil trapped in the oil inclusion and its relationship to the free oil/gas-condensate,a detailed molecular geochemical study was carried out for correlation between the free and inclusion oils.The paleo oil is most likely sourced from the Lower Permian Fengeheng Formation,which generated hydrocarbons primarily during Late Triassic and the oils were later secondarily altered and dysmigrated along faults likely during Late Jurassic-Early Cretaceous.In contrast,the current reservoired oil/gas-condensate mainly derived from the Middle Permian Lower Wuerhe Formation,whose peak generation time last from Late Cretaceous even to the present.This paper showed that integrated oil-bearing fluid inclusion analyses have likely allowed a complex multi-phase charge history to be recognized and resolved with a high degree of confidence. 相似文献
7.
The GOI(grains containing oil inclusions) index is used to distinguish oil zones,oil-water zones and water zones in sandstone oil reservoirs.However,this method cannot be directly applied to carbonate rocks that may not have clear granular textures.In this paper we propose the Effective Grid Containing Oil Inclusions(EGOI) method for carbonate reservoirs.A microscopic view under10× ocular and 10 x objective is divided into 10×10 grids,each with an area of 0.0625 mm×0.0625 mm.An effective grid is defined as one that is cut(touched) by a stylolite,a healed fracture,a vein,or a pore-filling material.EGOI is defined as the number of effective grids containing oil inclusions divided by the total number of effective grids multiplied by 100%.Based on data from the Tarim Basin,the EGOI values indicative of the paleo-oil zones,oil-water zones,and water zones are 5%,l%-5%,and 1%,respectively.However,the oil zones in young reservoirs(charged in the Himalayan) generally have lower EGOI values,typically 3%-5%. 相似文献
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9.
塔北地区志留系典型油气藏古油水界面恢复 总被引：10，自引：3，他引：7
油气藏油水界面的变迁记录了油气藏形成以后调整、改造甚至破坏的历史.恢复各地质时期的古油气水界面的位置, 可以帮助我们确定地下烃类流体运聚成藏的时间, 恢复流体成藏后的变迁、调整过程, 认识油气藏形成、分布的规律, 对研究区作出较为准确的资源评价.应用含油包裹体颗粒指数(GOI) 方法和定量颗粒荧光(QGF) 技术对塔北地区典型油气藏的古油水界面进行了恢复, 结果表明, 塔北地区志留系古油藏古油水界面的位置低于现今沥青砂岩段底界的位置, 沥青砂岩段底界并不是古油层的底界, 在沥青砂岩段之下还有一段古油柱, 在油藏破坏过程中, 这部分原油运移到构造的高部位了, 没有在原地留下沥青; 沥青砂的厚度小于古油柱的厚度, 这意味着古油藏的规模要大于现今油藏规模. 相似文献
10.
CAO Jian WANG Xulong SUN Ping’an SHI Xinpu HU Wenxuan YAO Suping ZHANG Yueqian TANG Yong XIE Xiaomin 《《地质学报》英文版》2011,85(5):1163-1172
The values of grains containing oil inclusions (GOI) in 120 reservoir sandstone samples from the central Junggar Basin of Northwest China were investigated. The sandstones are characterized by different types of hydrocarbon production and shows. The values range from 0.015% to 19.9%, and show a fairly good correlation with the hydrocarbon production/shows, which are qualitatively suggestive of reservoir hydrocarbon abundance and petroleum migration. Thus, it may be implied that the values can reflect hydrocarbon migration, being not controlled mainly by the other influencing factors. Further correlation between the values and the reservoir hydrocarbon production and show types indicates that the GOI method can be used in hydrocarbon migration study when the petroleum type of a reservoir is normal oil or gas alone, but it should be used with caution when light oil charges the reservoirs or a complex hydrocarbon migration event takes place. The case study in the central Junggar Basin using the method presents some new understanding on hydrocarbon migration. Thus, the method may help to solve specific petroleum geological problems, and can be treated as a routine tool in hydrocarbon migration study. 相似文献