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horizontal transportation
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  横向输导
    The fault systems, unconformity surfaces, interconnecting pore systems and diapir structures constitute the complex network system of vertical and horizontal transportation within the depression.
    中部弱超压和深部强超压3部分组成,断裂系统、不整合面和相互连通的孔隙系统及底辟构造组成了凹陷内流体纵、横向输导的复杂网络系统;
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    In order to overcome the shortcomings of traditional identification methods,mineral oil,air and water are used as working fluids to simulate the crude oil,natural gas and water multiphase flow in horizontal transportation pipeline,a piezo-resistance differential pressure transducer is adopted to measure the differential pressure of the flow. Thus the differential pressure signals which reflect the characteristics of fluctuation of oil-gas-water multiphase flow are obtained.
    为了克服传统流型识别方法的缺点,本文在实验 室采用机油、空气和水作为工质来模拟现场的水平管内的油气水多相流流动,采用压阻式压差传感器对水平管内的油气 水多相流流动的压差进行测量,得到反映油气水多相流流动波动特性的压差信号。
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  horizontal transportation
Transect observation at the littoral zone suggested that horizontal transportation may be a reason for the high methane concentration in epilimnion and thermocline at the offshore area.
      


The mudstone sonic log interval, measured stratigraphic pressure and seismic data are integrated to analyze the underground fluid pressure fields in Damintun depression, Liaohe basin. The research results show the following six points: (1) The mudstone compaction in this region is classified as the following three types: normal compaction_normal pressure, under_compaction and low overpressure in one single interval, and under_compaction and high overpressure in double intervals. (2) The pressure gradient...

The mudstone sonic log interval, measured stratigraphic pressure and seismic data are integrated to analyze the underground fluid pressure fields in Damintun depression, Liaohe basin. The research results show the following six points: (1) The mudstone compaction in this region is classified as the following three types: normal compaction_normal pressure, under_compaction and low overpressure in one single interval, and under_compaction and high overpressure in double intervals. (2) The pressure gradient of the oil layers is approximate to 1, so it is often within the normal pressure system. (3) The characteristics of planes and profile pressure fields obtained through the seismic data are of a higher feasibility and reliability. (4) The current profile pressure system consists of normal pressure, low overpressure, and high overpressure from surface to the deep layers. The fault systems, unconformity surfaces, interconnecting pore systems and diapir structures constitute the complex network system of vertical and horizontal transportation within the depression. (5) A distinctive difference exists between the surplus pressures and pressure coefficients on both sides of the relatively large_scale faults controlling greatly the formation, evolution and distribution of the pressures. (6) The under_compaction and hydrocarbon generation are the leading mechanisms for the formation of the overpressure in this region.

综合利用泥岩声波时差、实测地层压力和地震资料 ,分析了辽河盆地大民屯凹陷的地下流体压力场特征 .研究结果表明 :(1)本区泥岩压实类型可划分为正常压实 -常压型、单段欠压实 -弱超压型和双段欠压实 -强超压型三大类 ;(2 )油层压力梯度接近于 1,多属正常压力系统 ;(3)利用地震资料研究平、剖面压力场特征具有较高的可行性与可靠性 ;(4)现今剖面压力系统由浅部正常压力、中部弱超压和深部强超压 3个部分组成 ,断裂系统、不整合面和相互连通的孔隙系统及底辟构造组成了凹陷内流体纵、横向输导的复杂网络系统 ;(5 )规模较大断层两侧的剩余压力和压力系数具较明显的差异性 ,断层对压力的形成、演化与分布起着重要的控制作用 ;(6 )欠压实与烃类生成是本区超压形成的主导机制

There exist no accurate evaluation indexes in traditional identification methods of flow regime. Usually, researchers can only give ambiguous description of the characteristics of each working condition. This brings out great dependence on judgement of researchers and makes automatic and on line identification of flow regime impossible. In order to overcome the shortcomings of traditional identification methods,mineral oil,air and water are used as working fluids to simulate the crude oil,natural gas and water...

There exist no accurate evaluation indexes in traditional identification methods of flow regime. Usually, researchers can only give ambiguous description of the characteristics of each working condition. This brings out great dependence on judgement of researchers and makes automatic and on line identification of flow regime impossible. In order to overcome the shortcomings of traditional identification methods,mineral oil,air and water are used as working fluids to simulate the crude oil,natural gas and water multiphase flow in horizontal transportation pipeline,a piezo-resistance differential pressure transducer is adopted to measure the differential pressure of the flow. Thus the differential pressure signals which reflect the characteristics of fluctuation of oil-gas-water multiphase flow are obtained. By using the reconstruction of pesudo-phase space algorithm (Grassberger-Procaccia algorithm),the correlation dimensions of the denoised differential pressure signals are obtained. Based on the correlation dimensions of different flow regimes and working conditions,the characteristic vectors of different flow regimes and different working conditions are constituted. Thus the quantification of characteristics of flow regime of oil-gas-water multiphase flow is realized. The characteristic vectors are then input into the Radius Basis Function (RBF) neural network. Through training with study samples,the trained RBF neural network can automatically identify the flow regime of test samples (differential pressure signals of unknown flow regimes) on line. Results showed that the method discussed in this paper had the merits such as high accuracy, fast response and no artificial intervention. It has a promising prospect for application in petroleum and nuclear industries.

传统的流型识别方法对流型特征没有一个量化的评价指标,只能由识别者采用模糊的语言描述每种工况的特征,在 很大程度上依赖于每个识者的主观判断,很难实现流型的在线自动识别。为了克服传统流型识别方法的缺点,本文在实验 室采用机油、空气和水作为工质来模拟现场的水平管内的油气水多相流流动,采用压阻式压差传感器对水平管内的油气 水多相流流动的压差进行测量,得到反映油气水多相流流动波动特性的压差信号。运用分形理论中的重构相空间算法(即 Grassberger-Procaccia算法),算出经过滤噪处理后的油气水多相流流动的压差信号序列的关联维数,以不同流型不同工 况的关联维数为基础构成不同流型不同工况下的多相流的特征向量,从而量化了油气水多相流的特征。将特征向量输入 径向基函数(Radius Basis Function,简称RBF)神经网络,通过学习样本的学习,即可用来对测试样本(未知流型的压差信 号)进行自动在线的流型识别。结果显示,该识别方法具有高精度、快速及不需人工干预等优点,在石化、核能等行业必将 有广阔的应用前景。

Fluid dynamical fields in Damintun Depression, Liaohe Basin show that: the paleogeothermal gradient in the study area is greater than present one; the mudstone compaction could be classified into three types such as normal compaction-normal pressure, uncompaction-low overpressure in single interval, and uncompaction-high overpressure in double intervals. The present profile pressure system consists of normal pressure, slight overpressure and intense over-pressure from top to bottom. The fault systems, unconformity...

Fluid dynamical fields in Damintun Depression, Liaohe Basin show that: the paleogeothermal gradient in the study area is greater than present one; the mudstone compaction could be classified into three types such as normal compaction-normal pressure, uncompaction-low overpressure in single interval, and uncompaction-high overpressure in double intervals. The present profile pressure system consists of normal pressure, slight overpressure and intense over-pressure from top to bottom. The fault systems, unconformity surfaces, interconnecting pore systems and diapir structures constitute the complex network system of vertical and horizontal transportation within the depression. Pressure evolution can be divided into two stages of initial overpressure accumulation and overpressure expulsion , and faults had an important controlling role to the formation, evoltution and distribution of the pressures. The fluid potential energy in profiles present a "double-layer" structure, and the depocenter was the fluid supply area whereas the slope was the main fluid dischareg area.

辽河盆地大民屯凹陷的地下流体动力场特征表明该区古地温梯度大于今地温梯度,泥岩压实可划分为正常压实-常压型、单段欠压实-弱超压型和双段欠压实-强超压型3大类;现今剖面压力系统由浅部正常压力。中部弱超压和深部强超压3部分组成,断裂系统、不整合面和相互连通的孔隙系统及底辟构造组成了凹陷内流体纵、横向输导的复杂网络系统;古压力场演化经历超压原始积累和释放2大阶段,断层对压力的演化与分布起重要的控制作用;流体势在剖面上呈“双层”式结构,洼陷为供流区,斜坡带为主要泄流场所。

 
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