The viscosity of crude oil plays a pivotal role in the exploration and development of oil fields. The predominant reliance on laboratory measurements, which are constrained by manual expertise, represents a significant limitation in terms of efficiency. Two-dimensional nuclear magnetic resonance (NMR) logging offers a number of advantages over traditional methods. It is capable of providing faster measurement rates, as well as insights into fluid properties, which can facilitate timely adjustments in oil and gas development strategies. This study focuses on the loose sandstone reservoirs with high porosity and permeability containing heavy oil in the Huabei oilfield. Two-dimensional nuclear magnetic resonance (NMR) measurements and analyses were conducted on saturated rocks with different-viscosity crude oils and varying oil saturation levels, in both natural and artificial rock samples. This study elucidates the distribution patterns of different-viscosity crude oils within the two-dimensional NMR spectra. Furthermore, the T1 and T2 peak values of the extracted oil signals were employed to establish a model correlating oil viscosity with NMR parameters. Consequently, a criterion for determining oil viscosity based on two-dimensional NMR was formulated, providing a novel approach for estimating oil viscosity. The application of this technique in the BQ well group of the Huabei oilfield region yielded an average relative error of 15% between the actual oil viscosity and the computed results. Furthermore, the consistency between the oil types and the oil discrimination chart confirms the reliability of the method. The final outcomes meet the precision requirements for practical log interpretation and demonstrate the excellent performance of two-dimensional nuclear magnetic resonance (NMR) logging in calculating oil viscosity. The findings of this study have significant implications for subsequent exploration and development endeavors in the research area’s oilfields.

如何客观评价页岩油层中的孔隙流体,准确测量和定量表征页岩油及致密油储层含油饱和度与可动油含量等参数,已经成为当前急需解决的重要技术难题.通过率先在国内引入车载移动式全直径岩心核磁共振测量仪,开展了页岩油岩心现场测试分析和评价研究工作,实现了现场对钻井取心进行连续、高精度、无损的快速核磁共振扫描,弥补了核磁共振测井和室内岩心实验的不足,填补了国内页岩油全直径岩心现场测量技术空白.结合现场岩心描述、其他配套实验数据及试油验证,系统总结出不同流体组分的二维核磁共振T1—T2图谱特征,明确了不同孔径中油、水信号的T1/T2比值变化规律,建立了基于全直径岩心二维核磁共振图谱特征的孔隙流体组分分析方法及识别标准,实现页岩油、致密油及复杂碎屑岩等储层孔隙流体组分准确识别与流体饱和度定量解释.车载移动式全直径岩心二维核磁共振测量技术方法在松辽盆地古龙页岩油、鄂尔多斯盆地长73页岩油、河套盆地勘探评价中发挥了重要作用,在大庆、长庆、西南、华北、新疆等致密油气田已规模应用,取得良好效果.

节能减排是企业发展追求的永恒主题.对于气田运行来说,投产后如何减少天然气消耗,各企业都有好的方法,对这些方法进行总结推广,对于减少温室气体排放、节约能源、降低成本都有十分重要的意义.迪那气田投产以来,在减少天然气消耗方面也积累了一些经验,比如井口少放喷、不放喷技术,闪蒸气回收利用技术,密闭灌泵技术,减少火炬放空技术等,在实际生产还对工艺参数进行了调整优化,取得了良好的效果.对这些实践经验进行总结,以及对其他气田生产运行过程中减少天然气消耗提供借鉴作用.

以科学发展观为指导,以节能增效为目的,全面提高能效利用率,实现新突破.为进一步提升气田节能水平,分析能效对标工作效果,基于塔里木油田分公司迪那Ⅱ气田及牙哈气田2021年上半年能耗情况进行分析,掌握能源使用情况,分析降耗瓶颈.基于分析结果,对两个气田上半年开展能效对标活动取得的成效进行总结分析,为能效对标下步工作方向提供指导意见,确保工作循序渐进的进行,为求实效.

以华北油田饶阳凹陷蠡县斜坡外带沙一下段为研究对象,在岩心和测井资料分析的基础上,采用统计分析方法,分析孔喉半径参数与储层渗透能力的相关性,确定影响储层物性的主控因素,研究孔隙结构参数对储层产能的影响及其规律.在此基础上,深度挖潜老区测井资料,建立基于老区测井资料的孔隙结构表征参数模型,构建储层产能预测模型,应用于老区潜力层评价,激活一批老井,为该区域中深层滚动开发提供依据,增储上产效果明显.

松辽盆地X地区的烃源岩评价主要基于岩心资料开展,受烃源岩非均质性强和岩心(屑)测试样品有限的双重制约,通过样品实测总有机碳质量分数(w(TOC) 平均值粗略表征烃源岩有机质丰度的方法已经无法满足油气精细勘探的需求.结合w (TOC)实测数据和测井曲线,针对研究区陆相烃源岩埋深大、孔隙度和电阻率曲线对有机质响应的敏感性差的特点,利用广义ΔlgR技术评价该区烃源岩,通过实测w(TOC)标定模型内的待定系数,建立针对研究区的w(TOC)预测公式,并对全区35口井进行叫(TOC)测井评价,依据测井评价的结果落实层序格架内烃源岩w(TOC)的分布特征.结果表明,广义ΔlgR技术预测w(TOC)与实测w(TOC)的平均相对误差不超过20.1％,结果比较可靠.研究区发育2个w(TOC)分布的高值区,富w(TOC)的暗色泥岩在空间上集中发育在三级层序SQ4中上部和SQ3中部,w(TOC)平均值分别为3.1％和2.4％.

With respect to the four blank strips of the formation micro-scanner conductivity image in FMI logging,investigated is an adaptive interpolation method of the blank strips by using singular spectral decomposition of the FMI conductivity image data,after that the multi-scale morphological filtering method was applied to separation of porosities among matrix,fracture and karst cave.Both of these methods are better suited for formations of strongly heterogeneous and randomly distributed fractures and vuggs.Fistly,the two dimensional FMI conductivity image data is analyzed by spectral decomposition method and interpolated by the an adaptive filling method,and the borehole FMI conductivity image is reconstructed completely.Secondly,the borehole FMI conductivity image data is noise-suppression and porosity separation of matrix,fracture and vug by means of multi-scale morphological filtering,and three kinds of porosities of matrix,fracture and vug have been obtained.Finally,the developed methods have been applied toreal FMI conductivity image data from 3 boreholesin a specificfields and the effectiveness and applicability of the methods have been verified.

T he gas reservoir property is poor and the percolation mechanism is complex in the eastern part of Upper Paleozoic in the Ordos Basin . It is difficult to determine the gas productivity index . And the relationship between gas abundance and porosity‐permeability is ambiguity . T herefore conventional productivity prediction method is not effective . Based on petrophysical experiments and wireline log data ,analyzed are the differences of different fluids in acoustic and elastic parameters .Then the sensitive parameters of the gas reservoir is optimized and gets the parameters with the Xu‐White model and Gassmann function .Lastly the prediction model is established on the basis of sensitive parameters . T he research concludes that bulk modulus is highly sensitive to the capacity of gas reservoir .And obtaining elastic parameters does not rely on the physical properties of gas reservoir .This method facilitates the capacity prediction of tight gas sandstone reservoir .

作为一种新型传感器,光纤光栅传感器因不受电磁干扰、信号传输可靠等优点在随钻测量中得到广泛应用。由于井下参数复杂且相互耦合,FBG传感器不可避免地会受其他参数的干扰,因此需要分析各种随机信号的特征,对所测参数进行正确的估计。在分析了井下温度、压力随机信号的特征后,建立了信号估计的模型。采用有限单元分析方法对检测的温度和压力二元关系进行相互影响分析；利用小波分析和 Winner参数估计等方法对钻柱振动以及各种随机噪声干扰信号进行去噪平滑处理。在仿真模拟分析基础上,获得随钻测量井下光纤光栅传感器信号处理方法。应用结果表明,这些方法能够在复杂的井下环境条件下准确获取温度压力真实值。

利用岩心、测井、铸体薄片和扫描电镜等资料,对沙湾凹陷三叠系百口泉组(Tb)的储层特征及其主控因素进行研究.认为研究区储集岩类主要为砂砾岩、砂质砾岩,其次为细砂岩;岩石的成分成熟度、结构成熟度均较低;储层总体属于中低孔-低渗储层;Tb成岩作用较强,处于早成岩阶段B期-晚成岩阶段A期,储集空间以残余粒间孔隙与次生溶蚀孔隙为主;影响Tb储层的关键因素为沉积作用,而成岩作用则是控制储层的主要因素.通过对该储层物性特征和主控因素的分析,可为致密砂砾岩优质储层的评价与开发提供借鉴.

储层岩石的电性响应特征及电性参数是常规油气储层评价的重要依据,其电阻率一般与流体的饱和度、矿化度密切相关,页岩气属于非常规油气,其储层特性与常规油气的相差较大,故电性响应特征和影响因素有待研究.多矿化度条件下页岩的复电阻率试验结果说明,页岩的复电阻率幅值和相位随矿化度的变化而改变,低矿化度条件下变化明显,高矿化度趋缓,在100g/L和200g/L时,2块页岩的电阻率幅值接近,相位基本重合.反演结果表明,电阻率随着矿化度的增大而减小,极化率整体上逐渐减小,最后趋于稳定,即矿化度越高,极化率基本保持不变.目前,电阻率和极化率参数已应用于页岩气勘探,不同矿化度条件下页岩的复电阻率特性有利于指导页岩气储层评价,但影响电阻率和极化率的因素较多,如页岩孔隙结构、矿物成分等,其影响程度和规律仍需进一步试验研究.

In late stage of condensate gas reservoir exploitation,the natural decline of formation pressure usually speeds up which poses increasing exploitation difficulties.In contrast,the need of industrial and civil gas grows continuously.Therefore the contradiction between the decrease of condensate gas production and the increase of natural gas demand is increasingly apparent.In order to solve the problem,we technically boost the pressure of low-pressure venting gas which can't be transported,and then put into the pipelines to increase the amount of natural gas which in turn reduces the environmental pollution of venting natural gas.

华北油田第一采油厂500 m 3储油罐及加热炉喷涂恩威尔特CC-100复合型绝热涂层前后的对比试验表明,使用CC-100涂层后油罐外表面平均温度降低了11.1℃,降幅26％；加热炉外表面平均温度降低了32.2℃,降幅45.1％.对水泵房的管道进行了纳米气凝胶保温毛毡包裹前后对比,试验结果表明使用纳米气凝胶保温毛毡后水泵房管道外表面平均温度降低了39.6℃,降幅49.3％.同时,应用有限元分析软件,计算了使用CC-100涂层后加热储油罐表面温度变化与使用纳米气凝胶包裹后水泵房管道热流密度变化,分析了其带来的可观经济效益.

We optimize the operation parameters by adjusting alcohol injection,regeneration temperature,stripping gas injection,the temperature of poor fluid into the tower of the third set of triethylene glycol dehydration process and get the following conclusions: when cycle volume of triethylene glycol dehydration is about 3840 kg/h,we gain the best regeneration effect,the highest poor liquid concentration and the lowest dry air water dew point;when the regeneration temperature is between 190-200℃,the higher the temperature,the better the regeneration effect;when the stripping gas amount of triethylene glycol dehydration device is about 30 Nm3/h,we obtain the best regeneration effect,the highest poor liquid concentration and the lowest dry air water dew point.