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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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Recent advances in petrophysical and geophysical characterization of unconventional resources:Introduction

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Energy geoscience 2023年第2期4卷 62-63页

作者： xinmin ge Michael T.Myers Jun Li China University of Petroleum(East China) QingdaoShandong266580China University of Houston HoustonTexas77204USA SINOPEC Petroleum Exploration and Production Research Institute Beijing102206China

As a bridge between the reservoir performance and the geophysical well logging data,petrophysical measurements and its characterization are very important for the exploration and development of the unconventional resources in tight sandstone,carbonate and shale *** this special issue of Energy geoscience,“Recent advances in petrophysical and geophysical characterization of unconventional resources”,we organized and invited authors to present recent advances in various subjects addressing new petrophysical characterizations and geophysical models in unconventional reservoirs.

关键词： geophysical reservoirs sandstone

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Facial Features of an Air Gun Array Wavelet in the Time-Frequency Domain Based on Marine Vertical Cables

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Journal of Ocean University of China 2021年第6期20卷 1371-1382页

作者： ZHANG Dong LIU Huaishan XING Lei WEI Jia WANG Jianhua ZHOU Heng ge xinmin Key Laboratory of Submarine geosciences and Prospecting Techniques Ministry of EducationCollege of Marine GeosciencesOcean University of ChinaQingdao 266100China Qingdao Institute of Marine geology China Geological SurveyMinistry of Natural ResourcesQingdao 266071China Evaluation and Detection Technology Laboratory of Marine Mineral Resources Qingdao National Laboratory for Marine Scienceand TechnologyQingdao 266071China National Engineering Laboratory of Offshore Oil Exploration CNOOC Research InstituteBeijing 100028China BGP International CNPCZhuozhou 072750China School of geosciences China University of Petroleum(East China)Qingdao 266580China

Air gun arrays are often used in marine energy exploration and marine geological *** study of the single bubble dynamics and multibubbles produced by air guns interacting with each other is helpful in understanding pressure *** used the van der Waals air gun model to simulate the wavelets of a sleeve gun of various offsets and arrival *** factors were taken into account,such as heat transfer,the thermodynamically open quasi-static system,the vertical rise of the bubble,and air gun post *** vertical cables are located on the seafloor,but hydrophones are located in seawater and are far away from the air gun array *** situation conforms to the acquisition conditions of the air gun far-field wavelet and thus avoids the problems of ship noise,ocean surges,and ***-quality 3D wavelet data of air gun arrays were collected during a vertical cable test in the South China Sea in *** proposed an evaluation method of multidimensional facial features,including zeropeak amplitude,peak-peak amplitude,bubble period,primary-to-bubble ratio,frequency spectrum,instantaneous amplitude,instantaneous phase,and instantaneous frequency,to characterize the 3D air gun wave *** match between the facial features in the field and simulated data provides confidence for the use of the van der Waals air gun model to predict air gun wavelet and facial features to evaluate air gun array.

关键词： air gun van der Waals marine vertical cable facial features multidimensional

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A Novel Method to Enhance the Inversion Speed and Precision of the NMR T_(2) Spectrum by the TSVD Based Linearized Bregman Iteration

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Computer Modeling in Engineering & Sciences 2023年第9期136卷 2451-2463页

作者： Yiguo Chen Congjun Feng Yonghong He Zhijun Chen Xiaowei Fan Chao Wang xinmin ge State Key Laboratory of Continental Dynamics Northwest UniversityXi’an710069China Department of geology Northwest UniversityXi’an710069China Reseach Institute of Shaanxi Yanchang Petroleum(Group)Co. Ltd.Xi’an710075China School of geosciences China University of PetroleumQingdao266580China

The low-field nuclear magnetic resonance(NMR)technique has been used to probe the pore size distribution and the fluid composition in geophysical prospecting and related ***,the speed and accuracy of the existing numerical inversion methods are still challenging due to the ill-posed nature of the first kind Fredholm integral equation and the contamination of the *** paper proposes a novel inversion algorithmto accelerate the convergence and enhance the precision using empirical truncated singular value decompositions(TSVD)and the linearized Bregman *** L1 penalty term is applied to construct the objective function,and then the linearized Bregman iteration is utilized to obtain fast *** reduce the complexity of the computation,empirical TSVD is proposed to compress the kernel matrix and determine the appropriate truncated *** novel inversion method is validated using numerical *** results indicate that the proposed novel method is significantly efficient and can achieve quick and effective data solutions with low signal-to-noise ratios.

关键词： Low field nuclear magnetic resonance linearized bregman iteration truncated singular value decomposition numerical simulations

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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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An unsupervised clustering method for nuclear magnetic resonance transverse relaxation spectrums based on the Gaussian mixture model and its application

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Petroleum Exploration and Development 2022年第2期49卷 339-348页

作者： ge xinmin XUE Zong’an ZHOU Jun HU Falong LI Jiangtao ZHANG Hengrong WANG Shuolong NIU Shenyuan ZHAO Ji’er School of geosciences China University of PetroleumQingdao 266580China CNPC Key Well Logging Laboratory Xi’an 710077China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China Oil and Gas Survey Center of China geological Survey Beijing 100083China China Petroleum Logging Co.Ltd. Xi’an 710077China PetroChina Research Institute of Petroleum Exploration&Development Beijing 100083China PetroChina Qinghai Oilfield Company Dunhuang 736202China Zhanjiang Branch of CNOOC Ltd. Zhanjiang 524057China Sinopec Research Institute of Petroleum Engineering Beijing 100101China

To make the quantitative results of nuclear magnetic resonance(NMR) transverse relaxation(T;) spectrums reflect the type and pore structure of reservoir more directly, an unsupervised clustering method was developed to obtain the quantitative pore structure information from the NMR T;spectrums based on the Gaussian mixture model(GMM). Firstly, We conducted the principal component analysis on T;spectrums in order to reduce the dimension data and the dependence of the original variables. Secondly, the dimension-reduced data was fitted using the GMM probability density function, and the model parameters and optimal clustering numbers were obtained according to the expectation-maximization algorithm and the change of the Akaike information criterion. Finally, the T;spectrum features and pore structure types of different clustering groups were analyzed and compared with T;geometric mean and T;arithmetic mean. The effectiveness of the algorithm has been verified by numerical simulation and field NMR logging data. The research shows that the clustering results based on GMM method have good correlations with the shape and distribution of the T;spectrum, pore structure, and petroleum productivity, providing a new means for quantitative identification of pore structure, reservoir grading, and oil and gas productivity evaluation.

关键词： NMR T2 spectrum Gaussian mixture model expectation-maximization algorithm Akaike information criterion unsupervised clustering method quantitative pore structure evaluation

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致密地层岩石脆性指数的测井优化建模

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石油学报 2015年第11期36卷 1411-1420页

作者：范卓颖林承焰王天祥葛新民中国石油大学地球科学与技术学院山东青岛266580 中国石油青海油田公司勘探开发研究院甘肃敦煌736202 中国石油大学CNPC测井重点实验室山东青岛266580

脆性评价是页岩油气、致密油气等非常规油气藏的大型压裂、开发等储层改造工程中的关键工作。根据岩石力学、动态弹性参数和岩石物理、X-射线衍射、地球化学等资料,分析了国内外几种常用脆性指数之间的相互关系,研究了弹性参数法脆性指... 详细信息

脆性评价是页岩油气、致密油气等非常规油气藏的大型压裂、开发等储层改造工程中的关键工作。根据岩石力学、动态弹性参数和岩石物理、X-射线衍射、地球化学等资料,分析了国内外几种常用脆性指数之间的相互关系,研究了弹性参数法脆性指数与岩石矿物组分及含量的关系,明确了矿物及组分对脆性的影响并应用多元回归法建立了基于权重矿物组分的脆性指数模型。构建新的岩石物理体积模型,应用最优化测井方法得到岩石的矿物和孔隙含量,实现了基于常规测井资料的脆性指数精确计算。研究表明:岩石脆性指数与矿物组分及含量有关,不同区块、不同地层的矿物具有不同的脆性特征;该工区方解石是使岩石脆性增强和裂缝产生的主要矿物,有机碳、黏土、石英和斜长石是降低脆性的重要矿物;基于常规测井资料的优化计算所得岩石组分及含量与实验数据一致性高;将处理结果与矿物组分模型相结合得到的脆性指数与弹性参数法脆性指数基本一致,为无横波资料井的岩石脆性评价奠定了基础。

关键词：脆性指数岩石力学矿物组分方解石常规测井

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“塞尔问题”与解释语义学

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学术月刊 2010年第6期42卷 43-50页

作者：高新民李艳鸽华中师范大学心灵与认知研究中心

"塞尔问题"即机器智能的意向性缺失难题,是心灵哲学、人工智能哲学和认知科学中的焦点问题之一。要造出真正能超出人类智能的智能,下一步就是要探讨意向性现实出现的机制与条件以及让它在机器中得以实现的方法和途径。沿着这一思路,经... 详细信息

"塞尔问题"即机器智能的意向性缺失难题,是心灵哲学、人工智能哲学和认知科学中的焦点问题之一。要造出真正能超出人类智能的智能,下一步就是要探讨意向性现实出现的机制与条件以及让它在机器中得以实现的方法和途径。沿着这一思路,经典计算主义在辩护基础上开始研究句法加工如何表现语义性,新生代计算主义正在崛起,联结主义作了新的回应,进化论语义学倡导研究大自然的"意向性建筑术",解释语义学也是这一探索中所出现的一种具有个性的理论。卡明斯强调:表征并不是意向性的充分条件,而只是必要条件。要让人工智能表现出意向性,一是要让它有表征能力,二是要有社会、文化等约束因素,三是要让计算机有内在的整体结构,四是要在人工智能的研究中探讨如何让机器有内在的解释机制。解释语义学无疑为人工智能如何真正接近或超越自然智能指出了一条可能的出路。人的意向性中那种隐秘的、重要的关联能力似乎隐约地掀开了它的神秘面纱:借解释可部分实现这种关联。

关键词：意向性人工智能解释表征计算

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基于实验分析的泥质砂岩T_2截止值确定方法研究

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测井技术 2011年第4期35卷 308-313页

作者：葛新民范宜仁邓少贵中国石油大学地球资源与信息学院山东青岛266555 中国石油大学CNPC测井重点实验室山东青岛266555

核磁共振T2截止值(T2,cutoff)的确定主要通过离心法和经验值法得到,在实际应用中具有极大的局限性。根据泥质砂岩的渗流特性和Coates-cutoff模型建立了泥质砂岩的T2,cutoff计算模型。核磁共振T2,cutoff与岩石的孔隙结构、渗流特征有关;... 详细信息

核磁共振T2截止值(T2,cutoff)的确定主要通过离心法和经验值法得到,在实际应用中具有极大的局限性。根据泥质砂岩的渗流特性和Coates-cutoff模型建立了泥质砂岩的T2,cutoff计算模型。核磁共振T2,cutoff与岩石的孔隙结构、渗流特征有关;泥质砂岩的T2,cutoff分布范围较大。通过对渗透率模型的对比分析,得到了T2,cutoff与阳离子交换容量QV的理论模型;泥质砂岩的T2,cutoff随着QV的增大而减小,但其减小幅度随着QV的增大而不断减小。研究表明,岩石的核磁共振T2,cutoff与阳离子交换容量QV呈幂函数的关系;可通过该模型进行T2,cutoff的精确计算,为T2,cutoff的计算方法提供了一个新的思路。在实际应用中需要考虑阳离子交换量如何准确计算的问题。

关键词：核磁共振测井泥质砂岩渗流特征渗透率 T2截止值阳离子交换容量实验

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洞穴型地层双侧向测井响应模拟与特征分析

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石油勘探与开发 2016年第2期43卷 237-243页

作者：范宜仁王磊葛新民范卓颖巫振观刘家雄黄瑞中国石油大学(华东)地球科学与技术学院中国石油大学CNPC测井重点实验室中国石油天然气勘探开发公司

为研究碳酸盐岩、火山岩等洞穴型储集层双侧向测井响应特征,基于数值模拟优化设计实验室缩小比例物理模拟系统的仪器及地层模型参数,并用物理实验数据标定数值模拟结果,进而研究原始地层条件下洞穴型储集层的双侧向测井响应特征。结果表... 详细信息

为研究碳酸盐岩、火山岩等洞穴型储集层双侧向测井响应特征,基于数值模拟优化设计实验室缩小比例物理模拟系统的仪器及地层模型参数,并用物理实验数据标定数值模拟结果,进而研究原始地层条件下洞穴型储集层的双侧向测井响应特征。结果表明:实验室地层径向半径和纵向长度分别为1.0 m和2.0 m,双侧向测井仪器纵向及径向分别缩小为1/20和1/6时,即可满足实验室缩小比例物理模拟的需要,且缩小比例物理实验结果与数值计算结果对应性好。利用物理模拟实验刻度后的数值模拟参数,研究洞穴型原状地层双侧向测井响应特征,结果表明:井旁洞穴双侧向测井曲线在洞穴中心深度位置视电阻率达到最低,双侧向测井值无法准确反映洞穴真实电阻率值;洞穴半径越大、充填物电阻率越低、洞穴距井壁越近,双侧向测井对井旁洞穴敏感性越强;深侧向测井可识别的洞穴边界至井壁径向距离小于0.5 m,浅侧向测井可识别最大距离为0.3 m。

关键词：洞穴型地层双侧向测井响应模拟测井响应特征

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