激发极化测井仪若干理论与方法研究

发布时间：2018-04-15 08:39

本文选题：多参数测量 + 激发极化　；参考：《华中科技大学》2013年博士论文

【摘要】：本文针对含水地层、复杂地层、和深层和超深层地层的测井等问题,从电化学的角度研究和分析激发极化测井方法,实现对阳离子交换量、地层水矿化度、地层岩石孔隙度和岩石孔隙半径分布等信息获取及在线多参数计算；并且通过电网络和电极阵列的方法获取实验室条件下的阻抗分布信息,进而获取含水饱和度分布的信息。论文的主要研究工作和内容可以概括为以下几个方面。本文基于“岩石导电机理的本质是溶液中离子传导过程”这一思想指导,建立了地层电位、阳离子交换量和地层水矿化度三者在不同平衡状态下的关系模型,为在线实时求解激发极化测井过程中的阳离子交换量和地层水矿化度提供出一条可行途径。另外,通过对岩石孔隙的极化和退极化过程分析,说明弛豫过程包含了岩石孔隙结构的信息,并以此建立了饱和极化率和岩石孔隙度之间的数学关系。文中给出了相应的实验室岩心测量的数据分析结果,验证了利用该方法获取岩石孔隙度的合理性。然而孔隙度尚不能很好的描述孔隙大小和具体结构的信息问题,本文通过电化学极化理论,利用迭代反演方法取得地层岩石中不同大小孔隙体积所占的百分比。将该结果和其他测井仪器的测量参量综合后,为获得地层渗透率提供了新的信息。另外,本文采用电网络模拟和电极阵列的方法,利用反演实现重建地层岩心的阻抗分布模型。仿真实验结果表明,利用反演方法获取的阻抗分布信息可以为计算含水饱和度分布的深入研究提供了一种新的途径。最后,论文给出了所研制的我国具有独立知识产权的井下激发极化测井仪器设计方案。初步的井下实验结果表明,设计方案正确,设计指标基本达到预期。
[Abstract]:In this paper , the information acquisition and on - line multi - parameter calculation of cation exchange , formation water salinity , formation rock porosity and distribution of rock pore radius are realized from the viewpoint of electrochemistry and the logging of deep and ultra - deep formations .
The main research work and contents of this paper can be summarized as follows .

Based on the thought of " the essence of rock conduction mechanism is the ion conduction process in solution " , this paper establishes the relation model of formation potential , cation exchange capacity and formation water salinity in different equilibrium states , and provides a feasible way for online real - time solving the cation exchange and formation water salinity in the process of excitation polarization logging .

However , the porosity is not very good to describe the pore size and the specific structure information problem . In this paper , by using the theory of electrochemical polarization , the percentage of pore volume in the formation rock is obtained by iterative inversion method . After the measurement parameters of other logging instruments are combined , new information is provided for obtaining the formation permeability .

In addition , the electrical network simulation and the method of the electrode array are used to reconstruct the impedance distribution model of the formation core by inversion . The simulation results show that the impedance distribution information obtained by the inversion method can provide a new way for further research on the calculation of the water saturation distribution .

Finally , the paper presents the design scheme of downhole excitation polarization logging instrument with independent intellectual property in China . The results show that the design scheme is correct and the design index is basically expected .

【学位授予单位】：华中科技大学
【学位级别】：博士
【学位授予年份】：2013
【分类号】：P631.83

【参考文献】