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The sensitivity of the array resistivity log to mud filtrate invasion and its primary five-parameter inversion for improved oil water recognition

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Petroleum Science 2012年第3期9卷 295-302页

作者： deng shaogui Sun Qingtao Li Hu Huo Ningning He Xuquan School of Geosciences China University of Petroleum(East China)Shandong 266555China PetroChina Southwest Oil&GasField Company Sichuan 610051China

In order to improve reservoir fluid recognition, the sensitivity of array resistivity response to the difference of the invasion properties in both oil-bearing layers and water layers is analyzed. Then the primary inversion is carried out based on the array resistivity log. The mud invasion process is numerically simulated based on the oil-water flow equation and water convection diffusion equation. The results show that the radial resistivity of a fresh mud-invaded oil-bearing layer presents complex distribution characteristics, such as nonlinear increase, increasing to decreasing and low resistivity annulus, and the resistive invasion profile of a water layer is monotonic. Under specific conditions, array resistivity log can reflect these changes and the array induction log is more sensitive. Nevertheless, due to the effect of factors like large invasion depth, reservoir physical and oil-bearing properties, the measured apparent resistivity may differ greatly from the actual mud filtrate invasion profile in an oil-bearing layer. We proposed a five-parameter formation model to simulate the complex resistivity distribution of fresh mud-invaded formation. Then, based on the principle of non-linear least squares, the measured array resistivity log is used for inversion with the Marquardt method. It is demonstrated that the inverted resistivity is typically non-monotonic in oil-bearing layers and is monotonic in water layers. Processing of some field data shows that this is helpful in achieving efficient reservoir fluid recognition.

关键词： Oil-water recognition mud filtrate invasion array resistivity log five-parameter inversion model

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Integrated petrophysical log characterization for tight carbonate reservoir effectiveness: A case study from the Longgang area, Sichuan Basin, China

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Petroleum Science 2013年第3期10卷 336-346页

作者： deng shaogui Wang Yang Hu Yunyun Ge Xinmin He Xuquan School of Earth Sciences and Resources China University of Geosciences School of Geosciences China University of Petroleum China Petroleum Great Wall Drilling Geological Research Institute China Petroleum Southwest Oil and Gas Field Branch

Ultra-low porosity and permeability, inhomogeneous fracture distribution, and complex storage space together make the effectiveness evaluation of tight carbonate reservoirs difficult. Aiming at the carbonate reservoirs of the Da＇anzhai Formation in the Longgang area of the Sichuan Basin, based on petrophysical experiments and logging response characteristics, we investigated the storage properties of matrix pores and the characteristics of fracture development to establish a method for the characterization of effectiveness of tight reservoirs. Mercury injection and nuclear magnetic resonance （NMR） experiments show that the conventional relationship between porosity and permeability cannot fully reflect the fluid flow behavior in tight matrix pores. Under reservoir conditions, the tight reservoirs still possess certain storage space and permeability, which are controlled by the characteristic structures of the matrix porosity. The degree of fracture development is crucial to the productivity and quality of tight reservoirs. By combining the fracture development similarity of the same type of reservoirs and the fracture development heterogeneity in the same block, a three-level classification method of fracture development was established on the basis of fracture porosity distribution and its cumulative features. According to the actual production data, based on the effectiveness analysis of the matrix pores and fast inversion of fracture parameters from dual laterolog data, we divided the effective reservoirs into three classes： Class I with developed fractures and pores, and high-intermediate productivity; Class II with moderately developed fractures and pores or of fractured type, and intermediate-low productivity; Class III with poorly developed fractures and matrix pores, and extremely low productivity. Accordingly log classification standards were set up. Production data shows that the classification of effective reservoirs is highly consistent with the reservoi

关键词： Matrix porosity fracture porosity reservoir effectiveness reservoir classification petrophysical log characterization

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Response characteristics of array lateral logs and their primary inversion in reservoirs with fracture-induced anisotropy

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Petroleum Science 2011年第1期8卷 11-16页

作者： deng shaogui Fan Yiren Li Zhiqiang Sun Qingtao School of Geo-resources ＆ Information China University of PetroleumShandong 266555China China Research Institute of Radio Wave Propagation Henan 453003China

In order to identify fractured reservoirs and determine their fracture parameters with a high definition array laterolog,we built a fracture-induced anisotropic formation model with a parallel fracture *** three-dimensional finite element method is used to simulate the responses of the array laterolog,and then the primary inversion method is *** simulation shows that when the fracture spacing is small,the array laterolog response of the fracture group is the same as that of a formation with macroscopic electrical *** apparent resistivity of the array laterolog is approximately inversely proportional to fracture *** anisotropy depends on the fracture porosity in the fractured formation,which accordingly results in response variation of the array *** higher the fracture dip,the larger the apparent *** the fracture dip is low the difference between the deep and shallow apparent resistivities is small,and when the dip is high the difference turns out to be *** fracture parameters were inverted using the Marquardt non-linear least squares *** results,both fracture porosity and dip show a good match with parameters in the actual formation *** will promote the application of the array laterolog in evaluating fractured reservoirs.

关键词： Fracturing anisotropic reservoir fracture dip fracture porosity array laterolog

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Saturation Estimation with Complex Electrical Conductivity for Hydrate-Bearing Clayey Sediments:An Experimental Study

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Journal of Ocean University of China 2024年第1期23卷 173-189页

作者： XING Lanchang ZHANG Shuli ZHANG Huanhuan WU Chenyutong WANG Bin LAO Liyun WEI Wei HAN Weifeng WEI Zhoutuo GE Xinmin deng shaogui College of Control Science and Engineering China University of Petroleum(East China)Qingdao 266580China School of Water Energy and EnvironmentCranfield UniversityCranfield MK430ALUnited Kingdom Department of Alternative Energy PetroChina Research Institute of Petroleum Exploration&DevelopmentLangfang 065007China School of Geosciences China University of Petroleum(East China)Qingdao 266580China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China

Clays have considerable influence on the electrical properties of hydrate-bearing *** is desirable to understand the electrical properties of hydrate-bearing clayey sediments and to build hydrate saturation(S_(h))models for reservoir evaluation and *** electrical properties of tetrahydrofuran-hydrate-bearing sediments with montmorillonite are characterized by complex conductivity at frequencies from 0.01 Hz to 1 *** effects of clay and Sh on the complex conductivity were analyzed.A decrease and increase in electrical conductance result from the clay-swelling-induced blockage and ion migration in the electrical double layer(EDL),*** quadrature conductivity increases with the clay content up to 10%because of the increased surface site density of counterions in *** the in-phase conductivity and quadrature conductivity decrease consistently with increasing Sh from 0.50 to *** sets of models for Sh evaluation were *** model based on the Simandoux equation outperforms Archie’s formula,with a root-mean-square error(E_(RMS))of 1.8%and 3.9%,respectively,highlighting the clay effects on the in-phase *** fre-quency effect correlations based on in-phase and quadrature conductivities exhibit inferior performance(E_(RMS)=11.6%and 13.2%,re-spectively)due to the challenge of choosing an appropriate pair of frequencies and intrinsic uncertainties from two *** second-order Cole-Cole formula can be used to fit the complex-conductivity *** pair of inverted Cole-Cole parameters,i.e.,characteristic time and chargeability,is employed to predict S_(h) with an E_(RMS) of 5.05%and 9.05%,respectively.

关键词： gas hydrate complex electrical conductivity hydrate-bearing clayey sediment hydrate saturation Simandoux equation frequency dispersion Cole-Cole formula

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大斜度井/水平井随钻方位电磁波测井资料实时反演方法

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地球物理学报 2020年第4期63卷 1715-1724页

作者：王磊范宜仁操应长邓少贵中国石油大学(华东)地球科学与技术学院山东青岛266580 海洋国家实验室海洋矿产资源评价与探测技术功能实验室山东青岛266071 中国石油大学CNPC测井重点实验室山东青岛266580

水平井钻进过程中,地层边界的准确预测对地质导向决策至关重要.但水平井测井环境复杂,随钻方位电磁波测井响应不直观,储层性质、地层界面等信息的精确、定量评价困难.本文提出了一种适用于大斜度井/水平井随钻方位电磁波测井资料的电阻... 详细信息

水平井钻进过程中,地层边界的准确预测对地质导向决策至关重要.但水平井测井环境复杂,随钻方位电磁波测井响应不直观,储层性质、地层界面等信息的精确、定量评价困难.本文提出了一种适用于大斜度井/水平井随钻方位电磁波测井资料的电阻率及地层界面信息的实时提取方法.该方法主要基于以下几个技术:(1)引入滑动开窗策略将高维随钻方位电磁波测井资料的反演问题转化为多个连续窗口的一维反演问题;(2)对反演参数进行多初值初始化,结合正则化Levenberg-Marquardt算法保证解的全局最优性;(3)充分利用随钻方位电磁波测井多种探测深度信息,采用分级反演策略提高反演速度.数值和实测资料反演结果表明:降维反演方法可实现对地层界面的实时、准确提取,且适用于多数复杂地层结构和任意井眼轨迹;利用浅探测地质信号可实现随钻方位电磁波测井资料的分级反演,最终反演速度可提升10倍以上.

关键词：随钻方位电磁波测井实时反演地质导向地层界面

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各向异性倾斜地层双侧向测井响应数值模拟

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石油学报 2006年第3期27卷 61-64页

作者：邓少贵仝兆岐范宜仁中国石油大学地球资源与信息学院山东东营257061

利用三维有限元法,模拟了电性各向异性倾斜沉积岩层的双侧向测井响应。模拟结果表明:双侧向测井响应不仅受到地层倾角的影响,而且还受到地层电性各向异性的影响。在水平地层条件下,双侧向测井响应主要受到层理方向上地层电阻率的影响;... 详细信息

利用三维有限元法,模拟了电性各向异性倾斜沉积岩层的双侧向测井响应。模拟结果表明:双侧向测井响应不仅受到地层倾角的影响,而且还受到地层电性各向异性的影响。在水平地层条件下,双侧向测井响应主要受到层理方向上地层电阻率的影响;在倾斜地层条件下,垂向上的地层电阻率对测井响应的影响增大。电性各向异性倾斜地层不仅造成电阻率曲线形态的变化,而且深、浅电阻率幅度差异更为复杂,给利用深、浅电阻率幅度差异定性识别油气层造成困难。

关键词：倾斜地层各向异性电阻率双侧向测井三维数值模拟

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LABORATORY CORE DISPLACING TESTS ANDTHEIR COMPUTER DIGITAL SIMULATION

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Scientia Geologica Sinica 1999年第2期 233-239页

作者： Fan Yiren and deng shaogui (Department of Petroleum Resource Science, University of Petroleum, Dongying, Shandong Province 257062)

In oil exploration and oil development, marking off hydrocarbon zones mainly depends on resishvity *** in waterflooded areas, formation water is variable. Not only the hydrocarbon saturability but also the formation water resishvity affects the formation resistivity. The laboratory water displacing oil tests and the digital simulations reported in this paper show that the relationships between waterflooded rock resishvity and water saturability have tWo forms of the Rt-Sw curve: S-shaped and U-shaped, in Which the U-shaped is only a special case of the S-shaped. Some factors influencing the form of such curves are briefly discussed.

关键词： DI

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M7120A平面磨床操纵箱换向动态过程的试验研究

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机床与液压 1986年第1期 41-46页

作者：邓绍规周惟佳上海机床厂磨研所

本文对M7120A平面磨床操纵箱换向动态过程进行了试验和研究,找出了影响换向冲击和冲出量的诸因素,并提出了提高平面磨床换向特性的某些途径。此外,作者还对一种具有新的制动原理——行程与时间复合制动的操纵箱进行了试验,并取得了令人... 详细信息

本文对M7120A平面磨床操纵箱换向动态过程进行了试验和研究,找出了影响换向冲击和冲出量的诸因素,并提出了提高平面磨床换向特性的某些途径。此外,作者还对一种具有新的制动原理——行程与时间复合制动的操纵箱进行了试验,并取得了令人满意的结果。

关键词：平面磨床制动原理 M7120A 动态过程过渡过程试验研究

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基于随机粒子群的Newton-SVD方法的电测井反演

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计算物理 2010年第1期27卷 115-120页

作者：李智强范宜仁邓少贵陈华中国石油大学地球资源与信息学院山东东营257061

提出一种基于随机粒子群的Newton-SVD方法对双侧向测井进行双参数反演(原状地层电阻率,侵入带半径),运用随机粒子群方法得到双侧向测井反演的一个较为合理的初始值,结合Newton-SVD方法进行双侧向测井反演,提高测井反演的稳定性、可靠性... 详细信息

提出一种基于随机粒子群的Newton-SVD方法对双侧向测井进行双参数反演(原状地层电阻率,侵入带半径),运用随机粒子群方法得到双侧向测井反演的一个较为合理的初始值,结合Newton-SVD方法进行双侧向测井反演,提高测井反演的稳定性、可靠性,给出一种设定测井反演初始值的方法,通过对加入噪声的理想模型和实际资料进行处理表明,该方法可有效、准确地消除复杂测井环境的影响,得到真实的地层参数.

关键词：基于随机粒子群的Newton-SVD方法原状地层电阻率侵入带半径反演

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缝-洞型地层缝洞的双侧向测井响应数值模拟

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石油勘探与开发 2012年第6期39卷 706-712页

作者：邓少贵莫宣学卢春利张杨刘来垒中国石油大学(华东)地球科学与技术学院中国地质大学(北京)地球科学与资源学院中国石油测井有限公司

为研究缝-洞型地层的双侧向测井响应特征,建立洞穴和裂缝组合的介质模型,利用三维有限元方法对缝洞的双侧向测井响应进行数值模拟。结果表明,洞穴在一定尺度和范围内影响双侧向测井响应,随着洞穴尺度的增大,双侧向测井视电阻率降低,且... 详细信息

为研究缝-洞型地层的双侧向测井响应特征,建立洞穴和裂缝组合的介质模型,利用三维有限元方法对缝洞的双侧向测井响应进行数值模拟。结果表明,洞穴在一定尺度和范围内影响双侧向测井响应,随着洞穴尺度的增大,双侧向测井视电阻率降低,且深浅侧向视电阻率比值降低,但双侧向测井响应对离开井壁洞穴的较敏感范围不大于一个洞穴半径尺度。缝-洞型地层的双侧向测井响应主要受裂缝影响,低角度缝双侧向测井呈现负差异,而高角度缝双侧向测井为正差异,洞穴的存在不改变双侧向测井响应深浅侧向视电阻率与裂缝倾角的匹配关系。缝-洞型地层的双侧向测井视电导率与裂缝张开度存在线性关系。

关键词：缝洞地层双侧向测井测井响应数值模拟

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