研究区基岩储层为变质岩,岩性复杂,利用测井资料预测基岩岩性成为亟需解决的技术难题.为此,从测井岩性解释出发,对基岩岩性进行分析归类,结合多种测井曲线交会分析,寻找对不同基岩岩性响应特征敏感的测井曲线,依据交会图中不同岩性关键测井参数的变化,给出不同岩性的测井响应区域,进而区分不同的岩性.最后运用叠前、叠后多属性反演技术开展基岩岩性识别.

背压式汽轮机作为一项重要设备,在石油化工企业的运行和发展中发挥重要的作用.研究石油化工装置背压式汽轮机运行维护技术具有积极的社会意义,针对现阶段工作中所存在的各种问题进行有效解决,从而更好地推动石油化工企业的稳定发展.

五维地震数据通常是指宽方位、宽频带、高密度(“两宽一高”)采集的地震数据经过保方位角处理后形成的蜗牛道集,因其保留了方位角信息,为解决更复杂的地下各向异性地质问题提供了数据保障.如何挖掘五维数据的应用潜力是地震资料解释人员面临的新挑战.本文首次提出了炮检距—方位角域五维内插方法,实现了五维地震数据可视化,即实现了柱状道集显示以及共方位角道集、共炮检距道集、道集切片的显示和抽取;同时以可视化为基础,首次提出了方位统计法计算各向异性强度、绘制玫瑰图的方法,克服了传统椭圆拟合法不能描述多组裂缝的缺陷,提高了裂缝预测精度.

基于Fillipone公式的地震地层压力预测方法因其具有算法简单且不依赖于钻井数据和正常压实趋势线等诸多优点而被广泛应用于钻前压力预测.针对Fillipone公式中岩石速度上限和下限的确定存在经验性或区域局限性等问题,利用等效介质理论弹性模量边界算法,借助Voigt模型和Reuss模型、基于钻孔资料计算岩石速度上限和下限,进一步结合井地联合反演所获得的高精度层速度、密度,可以实现高精度地层压力预测,有效解决了岩性复杂区的压力预测问题,并在实际生产应用中取得了较好的效果.

低频信息对于流体检测精度的提高具有至关重要的作用.针对滨里海盆地岩性油气藏勘探的难题,在“两宽一高”地震资料的基础上,根据不同方位频率信息(尤其是低频信息)的差异,明确了利用方位最小质心频率流体检测效果最好.叠前质心频率流体检测技术能够消除上覆异常地质体等非储层流体因素对频谱的影响,在滨里海盆地东缘Z区块盐下碳酸盐岩油气藏描述中取得了较好的效果.

Fractured reservoir is the major reservoir type of buried hill oil pool in Bongor Basin, Chad. Due to the poor quality of the old seismic data in the study area, the basement imaging is unclear, which leads to the low coincidence rate of the previous fracture prediction. In recent years, 3D seismic data acquisition of "wide bandwidth, wide azimuth and high density" (hereafter referred to as "two-wides and one-high") has been implemented in several buried hills in Chad. As a result, the effect of basement imaging has been improved remarkably. As "two-wides and one-high" seismic survey has just become popular in recent years, there are fewer methods to predict fractures by using "two-wides and one-high" OVT processing data, and most of them are based on amplitude versus offset and azimuth theory (AVAZ). In this study, ellipse fitting method was firstly used to predict anisotropic intensity of P Buried hill in the Bongor Basin, then based on the results analysis, the limitation of ellipse fitting was pointed out. Furthermore, the anisotropic intensity prediction technology based on statistics was firstly applied in the Bongor Basin, in which the irregular gathers were first processed into helical gathers through gather regularization, and then variance of amplitude or TWT in gathers were counted to predict fractures. With this method, good results have been achieved in fractures predicting in P Buried hill in Chad, with more than 80% coincidence rate and a clear planar regularity of fracture distribution.

从机械井径测井技术、电磁检测技术、超声检测技术和井下视像检测技术几个方面介绍了国内套管检测技术现状。论述了国外如斯伦贝谢、哈里伯顿和贝克休斯等主要测井公司研制的套损检测先进设备,包括多触点成像仪、成像井径测井仪、多频电磁厚度检测仪、管柱分析测井仪、圆周声波扫描仪、超声波套管成像仪以及井下成像系统等。最后指出国内检测技术的不足和发展方向。

Firstly,the force situation and the factors influencing the ascensional velocity of the dispersed phase droplets in the water were analyzed.The software fluent and VOF multiphase flow model were used to simulate the rising process of bubbles in the water.The results of deformation and rising velocity of bubbles show that bubbles rely on the surface tension to maintain shape,and the viscosity ratio and density ratio have less impact on deformation.The rising velocity is mainly affected by viscosity ratio and density ratio;the higher viscosity ratio leads to the lower rising velocity while the greater density ratio results in higher velocity.Furthermore,the interaction between bubbles and oil droplets in the gas floating process in the water was simulated.The diffusion conditions of oil droplets on the bubble surface have been analyzed.It is shown that a only when the thermodynamic diffusion coefficient is positive,could a stable adhesion be formed,and could bubbles rise with oil droplets;if the size difference between bubbles and oil droplets is too large,no stable adhesion could be formed.

Predicting operation cost accurately was very important for increasing benefit of oilfield development as the most of waterflooding oilfields were at high water-cut stage.The main factors affecting operation cost of waterflooding oilfields were analyzed from three aspects,including production control,oilfield development and macroscopic environment,it figured out nine influential factors such as liquid production,the number of producing wells,water-cut,oil prices,CPI and so on.These influential factors are analyzed by conducting principal component analysis(PCA) before a principal component regression model is established,which is not only useful to quantify the effects of these 9 factors on operation cost but also effective and convenient in predicting the trend of operation cost of waterflooding oilfields.It provides a scientific basis for cost control of waterflooding oilfields.

为了解决油田开发产能建设项目优化研究中存在的问题,以油气开发产能建设项目组合的净现值为收益目标,以万吨产能投资为投资效率目标,建立了多约束条件下的产能建设项目的两目标优化模型.针对建立的模型,研究了基于多目标优化最优解集的改进蚁群优化算法,该算法能高效、准确的求解所建立的模型.实际应用表明,所建立的模型及改进求解方法具有很好的实用性和可操作性,能从收益和投资效率两个角度为油气开发投资决策提供有力的决策依据.

多方面加强对油系统的管理,防范油系统故障对WOODWARD505E数字电子调节器调速系统的影响。