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1.
OLT油田主力油藏目前含水率80%以上,为了制定科学的开发调整方案,需要对储层进行综合评价。笔者以该油田实际岩心资料、地质资料、生产资料和测井资料为基础,运用灰色系统精细评价技术,对储层岩性、物性以及含油性进行评价。研究中,根据关键井的岩心、地质、试油和动态资料与对应的测井资料相匹配,建立起储层岩性、物性、含油气性灰色评价标准;对非取心井,先计算储层地质参数,再利用上述灰色评价标准进行测井资料综合解释,从而研究了工区的岩性、储集层物性、含油性纵向分布特征,研究结果为油田的下步开发方案的调整奠定了坚实基础。总结出的储层灰色评价参数和标准对相邻地区具有一定的借鉴作用。 相似文献
2.
Based on the established mathematic model and graphic interpretation, a new method, which is used to calculate the contribution of single-zone production in a commingled producing well by the ultraviolet spectrum technique, has been established. The standard plate was drawn using the extinction coefficient E of sample oils formulated artificially as y-axis and the wavelength as x-axis. The curve resulting from the UV analysis of sample oils in the commingled well was inserted into the standard plate and compared. The proportion of each single zone in the commingled producing well was identical with the proportion of the curve which is closest to the curve of sample oils formulated artificially. In the well QHD32-6-3 field, taking well A22 for example and using this method, the production contribution of a single zone was calculated. The result showed that the Nm4 zone is a major "contributor", the proportion of the Nm4 zone is 70%, and that of the Nm1 zone is 30%. The ultraviolet spectrum technique provided a new reservoir geochemical technique of monitoring production contribution, especially for biodegraded heavy oil, but it has some limitation, just depending on the GC fingerprint technique. 相似文献
3.
横向各向同性（TI）介质是岩石地球物理中常见的一种现象,研究其井孔声场传播特征对声波测井理论以及为声波测井解释提供依据具有重要意义。针对具有垂直对称轴的横向各向同性（VTI）介质,根据柱坐标系条件下的弹性波波动方程,推导了速度-应力交错有限差分公式,采用时间二阶、空间十阶的交错有限差分算法对VTI介质中的井孔声场进行数值模拟。给出了在均匀介质中井孔声场不同时刻的波场快照,以及不同各向异性系数的VTI介质中的波场快照,计算了井轴上声源激发出的声波全波列波形。结果表明,在其他条件不变的条件下,VTI地层的各向异性系数的增大对横波的传播影响不大,但会使得纵波在纵向上的传播速度相对变小,径向上变化不大。各向异性系数的增大会使声波测井全波列首波信号时差变大,声波幅度略变小。 相似文献
4.
科学钻探中的元素测井技术 总被引：10，自引：0，他引：10
系统地介绍了科学钻探中应用自然伽玛能谱测井、活化测井、热中子俘获伽玛能谱测井和中子非弹性散射伽玛能谱测井确定元素含量的原理和方法;详细讨论了在不同的岩性条件下如何选择和建立从元素含量向矿物成分转换的模型。最后,介绍了元素测井技术在ＫＴＢ和ＯＤＰ中的应用,说明元素测井技术对重建岩性剖面、了解元素丰度和矿物成分的变化、研究矿物在高温高压下蚀变所涉及的地球化学作用、显示岩石的不均匀性和重建地球化学剖面等方面有特殊作用。此外,元素测井技术对于精确计算骨架密度、孔隙度和渗透率、井与井间相关对比,以及补足由于漏掉岩芯或岩屑而失去的有关信息,均具有重要作用。 相似文献
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LiuHongqi PengShimi ZhouYongyi XueYongchao 《中国地质大学学报(英文版)》2004,15(4):372-378
It is very difficult to discriminate natural fractures using conventional well log data, especially for most of the matured oUfields in China, because the raw data were acquired with relatively obsolete tools. The raw data include only GR and SP curves, indicative of lithology, AC curves, used to calculate the porosity of the formation, and a set of logging curves from various electrode length resistivity by laterolog. On the other hand, these oilfields usually have a large amount of core data which directly display the characteristics of the formation, and enough information of injection and production. This paper describes an approach through which logging curves are calibrated in terms of the raw data, and then a prototype model of natural fractures is established based on the investigation of core data from 43 wells, totaling 4 000 m in length. A computer program has been developed according to this method. Through analysis and comparison of the features of logging curves, this paper proposes a new concept, the well logging curve unit. By strictly depicting its shape through mathematical methods, the natural facture can be discriminated. This work also suggests an equation to estimate the probability of fracture occurrence, and finally other fracture parameters are calculated using some experimental expressions. With this methodology, logging curves from 100 wells were interpreted, the results of which agree with core data and field information. 相似文献
6.
Ras Fanar field is one of the largest oil-bearing carbonate reservoirs in the Gulf of Suez. The field produces from the Middle Miocene Nullipore carbonate reservoir, which consists mainly of algal-rich dolomite and dolomitic limestone rocks, and range in thickness between 400 and 980 ft. All porosity types within the Nullipore rocks have been modified by diagenetic processes such as dolomitization, leaching, and cementation; hence, the difficulty arise in the accurate determination of certain petrophysical parameters, such as porosity and permeability, using logging data only. In this study, artificial neural networks (ANN) are used to estimate and predict the most important petrophysical parameters of Nullipore reservoir based on well logging data and available core plug analyses. The different petrophysical parameters are first calculated from conventional logging and measured core analyses. It is found that pore spaces are uniform all over the reservoirs (17–23%), while hydrocarbon content constitutes more than 55% and represented mainly by oil with little saturations of secondary gasses. A regular regression analysis is carried out over the calculated and measured parameters, especially porosity and permeability. Fair to good correlation (R <65%) is recognized between both types of datasets. A predictive ANN module is applied using a simple forward backpropagation technique using the information gathered from the conventional and measured analyses. The predicted petrophysical parameters are found to be much more accurate if compared with the parameters calculated from conventional logging analyses. The statistics of the predicted parameters relative to the measured data, show lower sum error (<0.17%) and higher correlation coefficient (R >80%) indicating that good matching and correlation is achieved between the measured and predicted parameters. This well-learned artificial neural network can be further applied as a predictive module in other wells in Ras Fanar field where core data are unavailable. 相似文献
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随着数字化测井技术的飞速发展,国内外各种微机数字化测井系统相继问世。通过阜新煤田的实践,客观评价了JXW-1型微机数字化测井系统的性能及应用效果,并对该系统做了某些扩展与改进。 相似文献
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地震相和测井相联合预测火山岩相分布特征研究 总被引：1，自引：0，他引：1
以火山岩的基本地质特征、测井特征与测井相及其地震相特征与地震相分类为基础,依据测井相所建立的火山岩相模式,时地震相进行标定,形成由火山岩相、测井相和地震相组成的"三相"技术.该技术建立起"三相"之间的对应关系,以揭示火山岩相空间展布规律及变化特征.将"三相"技术应用于某盆地北部地区的营城组火山岩相研究.把营城组一段的地震相转换成火山岩相,得到火山岩相的平面分布,有效地预测出某盆地北部地区营城组一段火山岩的空间展布规律和火山岩储层有利相带.钻井证实:火山岩相之通道相岩石的物性最好,侵出相和爆发相次之,火山沉积相最差;火山岩相以火山颈岩物性最好,溢流相顶部次之. 相似文献
9.
储层特征描述是以石油地质学为理论基础，应用地质、物探、测井、测试等多方面信息和多种数学方法，以数据库为支柱，以计算机为手段，对油藏进行四维定量化研究并进行可视化显示、表征及预测。面向对象分析的关键是识别出问题域内的对象，并分析它们相互间的关系，最终建立起问题域的简洁、精确、可理解的正确模型。以测井资料为主的储层描述，把测井数据抽象为测井类，按测井数据源的类型又把测井类派生为常规测井类、特殊测井类和成像测井类。测井类的测井曲线具有相同的头数据文件类。对储层特征结构、测井信息的派生结构进行了相应的定义，并对测井曲线对象进行了描述。 相似文献
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低孔低渗致密砂岩储层的测井评价和开发难度较大,裂缝发育情况对这类储层的产能影响十分重要。为了利用常规测井资料实现致密砂岩储层裂缝发育情况的评价,基于井径、电阻率、密度、声波等常规测井曲线计算出8个裂缝指示参数,然后利用这8个参数构建了一个裂缝综合识别参数。该裂缝综合识别参数对裂缝的识别正确率更高。将这一套方法应用于鄂尔多斯盆地西南部镇泾油田延长组致密砂岩储层裂缝识别,对于所有样本,裂缝综合指标法识别正确率为81.4%以上。本研究给出的方法对于利用常规测井资料评价致密砂岩储层的裂缝发育情况和有效性提供了一种途径,对致密砂岩储层的勘探开发有一定的帮助。 相似文献
11.
地矿系统的测井和井中物探工作始于1954年, 三十多年来的主要成果是:(一)圆满地完成了历年能源矿产的测井任务, 取得了显著效果。(二)水文测井得到稳步发展, 技术水平逐步提高。(三)开拓了井中物探领域, 为寻找井底、井旁隐伏矿奠定了基础。(四)扩大了测井在原位测定矿层品位和区域物探领域中的应用。(五)取得了较显著的技术进步和科技成果。存在的主要问题有三个即:(一)对地下物探的作用估计不足, 像有形成正式而完整的技术规定。(二)一些方法技术和仪器设备没有跟上地质任务变化的需要。(三)技术力量过于分散, 形不成有力的拳头。在分析当前形势的基础上, 指出地下物探面临着机遇和困难并存的局面, 今后的奋斗目标是:推广数字测井技术, 发展微机控制、实时处理的井中物探仪器系列;地下物探要发展全方位服务, 力争更直接地参与国家经济建设, 并提出了四个方面的钻孔要进行测井, 三个方面的钻孔要进行井中物探。 相似文献
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测井与地震相结合进行地层横向参数分布刻划是测井解释由线向面过渡的趋势,亦是提高地震解释分辨率的有效途径之一。本文首先将地震和测井资料加以匹配,根据测井资料求出的地震子波与井旁地震道反褶积,得到时间域的声波时差,通过分形插值来提高地震道的纵向分辨率。子波的求取采用与传统方式不同的逐点相关法,即将测井得出的反射系数与井旁道上相应长的一段反褶积,当得到的波形与雷克子波相关性最佳时,可同时得到地震子波及本段测井曲线的起始时间。此方法推出的孔隙度与在地震测线上的另一口井的测井解释结果对比表明,效果较为明显,为深入探讨研究此类问题奠定了基础。 相似文献
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三露天井田具有断层发育、地层缺失和重复明显、岩性种类较多等特点,岩性识别难度较大。为此,专门利用测井资料对三露天井田地层岩性进行了岩性识别研究。通过对14个天然气水合物钻孔不同岩性的测井响应特征分析,优选了自然伽马、中子和密度测井作为岩性识别敏感参数,并采用交会图技术制作了岩性识别图版,建立岩性划分标准,对三露天井田地层岩性进行识别与划分。利用测井资料能够识别7种主要岩性,包括砂岩、粉砂岩、泥质粉砂岩、粉砂质泥岩、泥岩、油页岩和煤等。根据岩性测井识别结果,三露天井田岩性分布特征在横向上表现为东部砂岩物性好,西部地区泥岩较为发育;纵向上表现为木里组地层砂泥比为4.48,含有煤层204.5 m;江仓组地层砂泥比为0.84,泥岩和油页岩较为发育,更有利于水合物赋存。测井岩性识别结果为寻找三露天井田天然气水合物有利储层奠定了基础。 相似文献
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综合地球物理测井通过测量钻孔中地层岩石物理性质的变化,从而获得地层丰富的物性和位场信息。这里阐述了某铁路隧道钻孔的综合地球物理测井勘查效果,该方法已经成为一种行之有效的水文和工程地质勘查手段。 相似文献
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在取心困难的矿种上,利用测井方法原位测定矿层品位是一个值得开拓的领域。我国现用的测井求品位的方法技术,大体可分为两类,即核测井技术和回归分析处理技术,前者用中子活化测井原位测定萤石矿的品位,后者用天然伽玛测井求钙芒硝矿和含铀磷矿的品位,均取得了成功,并总结出一套工作方法。用测井方法求矿层品位优于用钻探取心、目视采样、然后化学分析的常规做法,原因是测井可连续测量,获得矿层信息完整,且横向探测半径又远比岩心大,故代表性强,且不存在化验分析所遇到的钻探采取率不足,以及取样的随机因素干扰,所以它提供的地下矿层品位的数据更接近真实。通过三个矿区的实例,说明测并可在现场即时提供品位数据,有利于指导地质人员取样和进一步的施工部署,在钻探采取率不高或打丢矿层时,借助测井资料可以不再采取其他工程补救措施,节约了时间和费用。本文还指出了要求测井品位和矿心分析品位完全一致的不合理性,阐明这是两种不同的独立分析方法,两者测量的样品不同,取样的方式不同,所以衡量两者提供品位数据的可信度,不仅取决于两者各自的测量精度,也取决于两者各自具有的地下矿层实际品位(即真值)的代表性,而在代表性方面,测井品位数据优于矿心分析数据,因此强调指出, 相似文献
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《China Geology》2020,3(2):210-220
Shenhu Area is located in the Baiyun Sag of Pearl River Mouth Basin, which is on the northern continental slope of the South China Sea. Gas hydrates in this area have been intensively investigated, achieving a wide coverage of the three-dimensional seismic survey, a large number of boreholes, and detailed data of the seismic survey, logging, and core analysis. In the beginning of 2020, China has successfully conducted the second offshore production test of gas hydrates in this area. In this paper, studies were made on the structure of the hydrate system for the production test, based on detailed logging data and core analysis of this area. As to the results of nuclear magnetic resonance (NMR) logging and sonic logging of Well GMGS6-SH02 drilled during the GMGS6 Expedition, the hydrate system on which the production well located can be divided into three layers: (1) 207.8–253.4 mbsf, 45.6 m thick, gas hydrate layer, with gas hydrate saturation of 0–54.5% (31% av.); (2) 253.4–278 mbsf, 24.6 m thick, mixing layer consisting of gas hydrates, free gas, and water, with gas hydrate saturation of 0–22% (10% av.) and free gas saturation of 0–32% (13% av.); (3) 278–297 mbsf, 19 m thick, with free gas saturation of less than 7%. Moreover, the pore water freshening identified in the sediment cores, taken from the depth below the theoretically calculated base of methane hydrate stability zone, indicates the occurrence of gas hydrate. All these data reveal that gas hydrates, free gas, and water coexist in the mixing layer from different aspects. 相似文献
18.
X射线荧光分析在岩屑录井中的应用 总被引：3，自引：0，他引：3
通过典型岩石化学的理论计算分析了部分沉积岩的成分特征和差别,为X射线荧光(XRF)录井分析鉴别岩性奠定了理论基础.地层在岩性组合与厚度上的差别是XRF录井技术鉴定地层的基本前提.根据沉积岩薄层岩层的厚度,提出以分米作为XRF录井取样的最低分辨率的标准.并以实例论述了在石油钻井的随钻过程中,采用XRF录井新技术进行岩性分析和地层对比的步骤;评价和展望了XRF录井新技术的特点与应用远景;指出建立不同岩性主要元素理论数据库和地区性地层岩性变化元素理论剖面的重要性;提出进一步改进XRF录井技术的方向. 相似文献
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This work established a geological model for the 5th member of the Xujiahe Formation (X5 member) in the Xinchang gas field of the West Sichuan Depression based on the lithological, structural and depositional properties, as well as logging and well completion data and drill-core observations. Rock mechanical parameters were calculated according to rock mechanic experiments and rock mechanic interpretations from logging data. We also calculated the magnitudes and orientations of the in situ stresses based on acoustic emission tests, differential strain tests, fracturing behaviour and logging interpretations as well as anisotropy logging tests, borehole-breakout measurements and well-log data. Additionally, the present stress field of the X5 member was simulated using finite element numerical (FEM) simulation methods. The numerical simulation results indicate that the distributions of lithology and fractures are key factors that influence the present stress field. The stress field in the study area is discontinuous as a result of fractures and faults in the central and eastern areas. Stress is concentrated at the end sections and bends of faults, but dissipates with distance away from both sides of the faults. A longitudinal profile clearly demonstrates the zonality and continuity of the stress field and an increase with depth. The differential stress distribution is relatively uniform; however, large deviations occur in fracture zones. 相似文献