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地球化学场除具有时间、空间要素,还具有环境约束条件特征,因此,其函数表达式应为Gij=Fij(X,Y,Z,T,C)。油气化探地球化学场是成烃物质油气地球化学场动态演化阶段中因油气勘探需要而在特殊时期设定的,通过油气化探地球化学场分析,研究化探指标物质量(质量、数量)在不同区域空间上的变化,进而为油气勘探服务;油气化探地球化学场因研究内容、目的、目标以及研究方法、手段、范围的不同可划分为多种不同类型地球化学场;微观和宏观、区域和局部、动态和静态相结合的理念应始终贯穿于油气化探地球化学场研究,油气化探地球化学场的客观分析和研究可为油气化探的勘探应用提供理论分析依据。 相似文献
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地球化学烃场效应及影响化探异常的因素 总被引:2,自引:2,他引:0
地球化学烃场随时间演化及地质作用(温度场、应力场、水动力场)的变化而发生空间上的转移,作为现今地球化学烃场的地下聚集体和深部烃类物质场源的油气藏,其演化过程也是深部烃场场源(油气藏)与场内介质进行物质交换与能量转移的过程,这必将带来场内介质(岩层、岩性等)的变化,进而在油气藏分布区域形成地球化学烃场效应.油气藏上方化探异常是地球化学烃场效应最为直接的近地表表现形式之一,影响化探异常的因素是:油气藏属性特征、化探指标属性特征(指标物理化学性质)、输导体系(地层、构造)、近地表介质条件等.油气化探实例说明:滤波数据处理技术、多方法和多指标的组合匹配使用可降低非深部烃源因素对化探异常的影响,提高化探异常反映深部油气藏的真实性和可靠性. 相似文献
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《Petroleum Science and Technology》2013,31(11-12):1867-1878
Abstract The Cretaceous Mardin Group sequence in the Adiyaman region displays a “continental platform type” petroleum system. The main lithologies within the sequence are shales, mudstones, and carbonates. Most dolomitic and bioclastic wackestones of the Karababa-C member and dolomites of the Derdere Formation have hydrocarbon reservoir characteristics, whereas shales and some carbonates of the Derdere and Karababa-A member have mature hydrocarbon source-rock properties. To determine the porosity and hydrocarbon saturation value vs. depth and areal extends, geostatistical simulation for the three dimensional evaluation of the study area were constructed and the variogram functions were calculated and then three dimensional variograms which were obtained from the porosity and hydrocarbon saturation values were modelled spherically. According to the simulation results, the porosity values in the Karababa-C member decrease with increasing depth. The amount of hydrocarbon saturation tends to decrease with increasing depth, as well and the decrease ratio is 7.2%. The suitability of the model parameters were validated with back-kriging technique. 相似文献
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Arzu Giray Yurdagul Cem Sarac Ismail Hakki Demirel 《Petroleum Science and Technology》2003,21(11):1867-1878
The Cretaceous Mardin Group sequence in the Adiyaman region displays a “continental platform type” petroleum system. The main lithologies within the sequence are shales, mudstones, and carbonates. Most dolomitic and bioclastic wackestones of the Karababa-C member and dolomites of the Derdere Formation have hydrocarbon reservoir characteristics, whereas shales and some carbonates of the Derdere and Karababa-A member have mature hydrocarbon source-rock properties. To determine the porosity and hydrocarbon saturation value vs. depth and areal extends, geostatistical simulation for the three dimensional evaluation of the study area were constructed and the variogram functions were calculated and then three dimensional variograms which were obtained from the porosity and hydrocarbon saturation values were modelled spherically. According to the simulation results, the porosity values in the Karababa-C member decrease with increasing depth. The amount of hydrocarbon saturation tends to decrease with increasing depth, as well and the decrease ratio is 7.2%. The suitability of the model parameters were validated with back-kriging technique. 相似文献
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准噶尔盆地页岩气尚属于研究起步阶段,勘探程度低,还未发现页岩气藏。通过对准噶尔盆地东南缘雅玛里克山、水磨沟、三工河等地区上二叠统芦草沟组油页岩样品进行有机地球化学特征系统分析,认为:芦草沟组油页岩有机碳平均含量为9.71%,油页岩氢指数(IH)平均值为471.56mgHC/gTOC,有机质类型主要为Ⅱ型,处于低熟—成熟热演化阶段。通过与北美五大页岩气系统地球化学参数和地质参数对比,初步确定准噶尔盆地东南缘存在发育热成因页岩气藏的条件,部分区域可能有生物成因气生成。3个地区中,以三工河地区油页岩有机质丰度最高,有可能成为研究区页岩气勘探开发的有利区域。 相似文献
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沈家铺油田枣Ⅴ油层组流体非均质性分布特征 总被引:1,自引:0,他引:1
沈家铺油田主力产油层枣Ⅴ油层组被多条断层切割 ,被分为 5个断块 ,每个断块都具有独立的油水系统 ,油水关系复杂 ,储集层流体非均质性强 ,原油具有密度、黏度、胶质与沥青质含量、含硫量都高的“四高”特点。将薄层色谱 火焰离子检测技术(TLC FID)和岩石热解分析 (Rock Eval)相结合 ,对枣Ⅴ油层组密集取样的储集层岩心抽提物进行族组分绝对定量分析 ,研究枣Ⅴ油组储集层流体非均质性分布特征 ,并对其成因进行探讨。研究结果表明 :纵向上随深度增加 ,枣Ⅴ油层组的含油性逐渐变差 ,但原油性质逐渐变好 ,可能是岩性变化和原油充注方向不同导致的 ;横向上 ,从北东向南西 ,枣Ⅴ油层组的原油性质逐渐变好 ,密度、黏度逐渐降低 ,胶质与沥青质含量逐渐减少 ,推测可能与油气运移方向和构造位置有关。图 3表 3参 3 相似文献
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注水开发油田地层压力评价中的问]题分析 总被引:6,自引:5,他引:1
从矿场实际出发,系统地分析了注开发油田动态监测过程中所取得的压力资料,在油田开发应用中存在的主要问题及井数加权法难以正确反映油藏实际压力水平的原因,提出了考虑油水井井数比、流动系数,孔隙体积、综合油水井压力资料评价注采系统压力水平的方法,同时指出,不同的开发阶段应采用不同的地层压力计算方法和地层压力评价方法,在注水开发过程中要考虑地层压力计算方法和地层压力水平评价方法在油田开发全过程中的适用性及可比性。 相似文献
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Attila Aydemir 《Journal of Petroleum Science and Engineering》2011,80(1):81-93
The organic-rich Barnett Shale is the primary source rock and the main unconventional reservoir in the Fort Worth Basin, Texas. The Early Silurian-Early Devonian Dadas Formation is one of the main source rocks in southeastern Turkey and it is the Turkish equivalent of Silurian hot shales in the Middle East and North Africa. In this study, similarities and differences between the Dadas Formation and the Barnett Shale are presented to indicate the unconventional reservoir potential of the Dadas Formation which covers similar acreage of the Barnett Shale. Main factors that form the basis for comparison are: depositional environment, tectonic setting, thickness, depth, organic geochemical properties and thermal maturity. Both formations have similar depositional environment and they have organic-rich, basal hot shale units indicated by a high gamma-ray log response. Thicknesses of both formations are appropriate to perform horizontal drilling and hydraulic fracturing, however, the Dadas is thicker than the Barnett Shale. Both formations have high Total Organic Carbon (TOC) and Potential Yield (S1 + S2) values. Both formations have gas prone and oil prone regions. However, the gas prone zone of the Barnett is larger. The Dadas Formation is penetrated by only a limited number of wells in comparison to the Barnett Shale. In contrast to the Barnett Shale, which is mainly in the gas zone in the Fort Worth Basin, the Dadas Formation is deeper, and is generally in the oil window. 相似文献
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胜利海上埕岛油田四井区砂岩胶结疏松 ,容易出砂 ;原油密度大 ,原油黏度在 383~ 1 0 0 8mPa·s范围内 ,原油胶质含量高。主要讨论不同原油黏度对不同绕丝筛管、不同砾石组合防砂效果的影响。研究结果表明 :89mm和 1 1 4mm绕丝筛管在相同砾石条件下 ,低黏度对防砂效果影响不大 ,而高黏度对防砂效果有较大影响 ;因此 ,对稠油油藏进行防砂设计时应考虑原油黏度的影响 相似文献
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为了在Weyburn和Midale油藏的Marly/Vuggy层带模拟三次CO2注入,做了一系列的岩心驱替实验.不同渗透率的贝雷岩心沿纵向对剖开.对开的岩心片段拼合起来,分别代表Marly层和Vuggy层.将水(水驱模式)和CO2(三次CO2驱模式)注入双重渗透率岩心的高渗透率部分的底部.岩心驱替结果表明,在三次CO2驱替中,CO2可以达到水驱难以波及到的低渗透率层的顶部.而且对于三次原油采收率的工作压力、注入速度和渗透率差异的反应也是很明显的. 相似文献
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伊朗雅达油田复杂地层钻井液技术 总被引:3,自引:0,他引:3
伊朗雅达油田地层复杂,具体表现在Gachsaran层大段石膏层污染钻井液,Kazhdumi层稠油质沥青侵入导致钻井液流变性能变差;Fahliyan地层为储层,井底温度高达145℃。前期完钻的5口井均出现了石膏、沥青污染和Fahliyan层压差卡钻等复杂情况,导致作业费用增加和钻井效率降低。在Gachsaran石膏层采用了抗膏聚合物钻井液,在Kazhdumi层采用了混入柴油和加入乳化剂等方法,在储层钻进中使用了超低渗透钻井液技术及分段封堵工艺,以解决高温高压下渗透性良好的孔隙性灰岩的压差卡钻问题。优化后的钻井液技术现场应用效果良好,F4井仅用65 d完钻,比邻井F23井钻井液总费用节约26万美金,钻井周期提前15 d。 相似文献
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论述了胜利埕岛馆陶组油藏的地质概况,储集层发育、岩性及孔隙结构特征,黏土矿物含量及其变化规律,黏土矿物对碎屑岩孔隙度、渗透率的影响,分析了母岩性质、气候条件、油气形成、沉积环境等地质因素对黏土矿物和储层特征的影响,逐一分析了伊/蒙混层矿物、高岭石、伊利石、绿泥石与储层伤害的关系。该油藏为典型的河流相沉积,矿物和结构成熟度低,非均质性强,胶结疏松,渗透率高,但主要由数量较少的大孔隙提供,石油储量和产量与高岭石含量成反比。与储层伤害有关的黏土矿物主要为蒙脱石,其次为高岭石,伊利石和绿泥石的伤害小。储层对工作液的敏感性,主要为伊/蒙混层矿物产生的水敏,其次为高岭石产生的速敏,绿泥石产生的酸敏小。图1表4参19。 相似文献
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滨里海盆地东南部盐上层系油气运聚规律与成藏 总被引:5,自引:3,他引:2
从纵向上、平面上的差异性出发,通过研究滨里海盆地东南部盐上层系油气藏的成藏特点和分布规律,指出盐上层系油气运移具有以下5个明显特征:①盐体活动形成的"有效盐窗"是盐上层系获得油气的重要途径;②盐上层系油气成藏的关键时刻分别在二叠纪—三叠纪、三叠纪末—早侏罗世沉积时期、中侏罗世—白垩纪,三叠纪末期成藏期最重要;③油气在平面展布分带性强,总体趋势是盐丘核部仅发育K1、J2稠油油藏,向盐丘侧翼盐檐部位及盐间分别发育T2气藏、油气藏和T1、P2油藏;④后期的保存条件是形成盐上优质经济油气储量的关键;⑤盐岩边部的盐檐部位稳定的侏罗系覆盖之下的三叠系背斜、断背斜圈闭,是盐上最有利的勘探目标。 相似文献