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Petroleum Science 2014年第2期11卷 293-299页

作者： pan baozhi Li Ding Chen Gang Wang Qincong Ma Lixin Liu Sihui College of Geo-Exploration Science and Technology Jilin University Xi'an Research Institute of China Coal Technology & Engineering Group Corp

Temperature curves reflect geothermal gradients and local temperature anomalies, thus providing a new understanding of the underground reservoir conditions. When encountering caverns or fractures and fissures during drilling, lost circulation may occur and result in a change to the original formation temperature field, and in severe cases, even the conventional open hole well logging data cannot be obtained. This paper uses finite element analysis software COMSOL to establish a heat transfer model for the wellbore/reservoir formation system during drilling and shut-in in the presence of lost circulation, and a case study is made in a carbonate reservoir in the Tahe oilfield. On the basis of the above, we analyze the temperature distribution in the leakage zone, and the studies have shown that the leakage and petrophysical properties have an impact on the temperature of the wellbore and formation, hence we can estimate the reservoir permeability using the temperature data. In addition, the determination of the temperature recovery time after some drilling fluids have leaked into the formation will help in recognizing the subsurface temperature field of the carbonate formation correctly, thus enhancing production logging interpretation accuracy and improving the understanding of later measurements.

关键词： Temperature field numerical simulation finite element drilling fluid invasion leakage

Determination of multi-component content and construction of digital cores based on CT grey thresholds of altered igneous rocks

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Global Geology 2023年第3期26卷 157-166页

作者： ZHANG Naiyu GUAN Yao GUO Yuhang WANG Qinghui ZHANG Lihua pan baozhi College of Geo-Exploration Science and Technology Jilin UniversityChangchun 130026China China National Offshore Oil Corporation Shenzhen 518067GuangdongChina

Altered igneous reservoirs have low porosity and permeability,compact structure and certain heterogeneity.A simple digital core with certain generality and multi-parameter constraints can be con-structed to characterize the microscopic pore structure and mineral composition.In this paper,based on core X-ray,CT images and whole-rock mineral analysis,threshold segmentation of mass content and grayscale distribution of various minerals in different lithologies of igneous rocks in the buried hill of Huizhou depression is carried out to construct digital core of altered igneous rocks.The results show that after converting the mineral mass content into volume content,the minerals of altered igneous rocks in Huizhou depression can be classified into components.According to the range of grayscale value,components can be divided into six parts.Due to the difference of the content of components in different lithologies of igneous rocks,differentiated grayscale threshold segmentation is needed to obtain the digital core for a single lithology.The final digital core generation process includes two steps:building a single component digital core,and stacking and combining.This kind of universal digital core model can support the subsequent pore scale numerical simulation and comprehensive rock physics research.

关键词： CT threshold segmentation digital core mineral

Parameters of new three-water model based on nuclear magnetic experiment and optimization algorithm

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Global Geology 2023年第1期26卷 57-62页

作者： KANG Nan HONG Xin ZHANG Lihua pan baozhi TANG Lei ZHANG Pengji Engineering Technology Branch of CNOOC Energy Development Co. Ltd.Tianjin 300452China College of Geo-Exploration Science and Technology Jilin UniversityChangchun 130026China

Clastic rock reservoir is the main reservoir type in the oil and gas field.Archie formula or various conductive models developed on the basis of Archie’s formula are usually used to interpret this kind of reservoir,and the three-water model is widely used as well.However,there are many parameters in the threewater model,and some of them are difficult to determine.Most of the determination methods are based on the statistics of large amount of experimental data.In this study,the authors determine the value of the parameters of the new three-water model based on the nuclear magnetic data and the genetic optimization algorithm.The relative error between the resistivity calculated based on these parameters and the resistivity measured experimentally at 100%water content is 0.9024.The method studied in this paper can be easily applied without much experimental data.It can provide reference for other regions to determine the parameters of the new three-water model.

关键词： new three-water model optimization algorithm NMR water saturation rock electric parameters

Experimental study on parameter determination of fluid replacement equation for volcanic reservoirs

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Global Geology 2020年第4期23卷 234-240页

作者： ZHOU Weiyi pan baozhi GUO Yuhang College of Geo-Exploration Science and Technology Jilin UniversityChangchun 130026China

In this study,the parameters of Gassmann equation based on fluid replacement theory are studied by measuring the acoustic velocity during the evaporation process of volcanic rocks in Nanpu area.The experimental data show that with the decrease of porosity of tight volcanic rock,the acoustic velocity difference between dry and wet rock samples increases,which is conducive for the identification of gas bearing reservoirs with acoustic log data.The fluid bulk modulus distribution of volcanic rocks in the study area conforms to Brie model,and the value of empirical coefficient e is related to lithology.The experimental results show that there is a linear relationship between the P-wave transit time of dry and wet rock samples.Using porosity to calculate the acoustic transit time of saturated rock samples,and taking it into the experimental formula,we can get the P-wave transit time and bulk modulus of dry rock samples.According to the bulk modulus of mixed fluid,dry rock and rock matrix determined by experiments,the saturation of volcanic reservoir in Nanpu area is calculated by Gassmann equation,which is in good contrast with the conclusion of gas test.This study provides an experimental basis for quantitative evaluation of volcanic gas reservoirs using seismic and acoustic logging data.

关键词： volcanic rock acoustic velocity Gassmann equation parameter determination saturation calculation

Influence of wettability of shaly sandstone on rock electricity parameters

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Global Geology 2020年第3期23卷 191-198页

作者： ZHAO Yongqiang pan baozhi SI Zhaowei LIN Fawu College of Geo-Exploration Science and Technology Jilin UniversityChangchun 130026China Petro China Jidong Oil Field Company Tangshan 063000China

It has been found that the existence of chlorite and illite will lead to the rock wettability of oil affinity.Chlorite and illite are developed in shaly sandstone of Yingcheng Formation in Longfengshan area,the saturation index n of 7 rock samples is very high,with the highest of 14.57,whereas the cementation index m is low.The X-ray diffraction of clay and whole rock analysis of 7 shaly sandstone samples are carried out,and the relationship between chlorite and illite content vs.m and n is established.It is concluded that the low m value and high n value are caused by the wettability of rock.In order to verify the influence of wettability on the parameters of rock electricity,this paper discusses the method of making artificial shaly sandstone and the control of wettability.This study provides certain reference for determining the saturation model of shaly sandstone and improving the logging interpretation accuracy of shaly sandstone reservoirs.

关键词： wettability rock electricity parameters chlorite illite shaly sandstone

Geochronological and geochemical constraints on the granitic gneiss in the Huozhou Complex: implications for the tectonic evolution of the Trans-North China Orogen

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Acta Geochimica 2023年第1期42卷 153-181页

作者： Chong Peng Haiyan Liu Ruiying Zhang Cremilda Samuel Jofrisse Linfu Xue baozhi pan College of Geographical Sciences Shanxi Normal UniversityTaiyuan 030031China Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources Institute of GeologyChinese Academy of Geological SciencesBeijing 100037China State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi’an 710069China College of Geo-Exploration Science and Technology Jilin UniversityChangchun 130026China College of Earth Sciences Jilin UniversityChangchun 130061China School of GeoSciences University of EdinburghEdinburgh EH93JWUK

The Trans-North China Orogen is a major Neoarchean Paleoproterozoic collisional orogenic belt above the North China Craton, formed due to prolonged and complex processes. Even though many NeoarcheanPaleoproterozoic magmatic and metamorphic activities have been reported, due to the Huozhou Complex’s small outcropping range, little attention has been paid to the origin of various igneous rocks of the Huozhou Complex in the center of the Trans-North China Orogen. The Huozhou Complex, located south of the Luè liang, Wutai, and Hengshan complexes, is an important window into the Early Precambrian structure and evolution of the North China Craton. Its magma and metamorphism are crucial to understanding the development of the structural evolution of the Trans-North China Orogen. The Huozhou metamorphic complex area exposes a range of Precambrian metamorphic rocks, among which the most extensively dispersed is felsic biotite plagioclase gneiss. In this study comprehensive geological field survey, micropetrology,chronology, geochemistry, and Hf isotope analysis were carried out for the Qinggangping and Anziping gneiss in the north of the Huozhou Complex. The results show that the magmatic zircon age of the Qinggangping gneiss is2196 ± 14 Ma, and its protolith is I-type granite, formed by partial melting of igneous rocks in the absence of weathering. Its source is mainly the juvenile crust from depleted mantle dating 2431–2719 Ma, with a small amount of mantle-derived material. The Anziping gneiss has a metamorphic zircon age of 1931 ± 13 Ma with an S-type granite protolith belonging to peraluminous granite.The Anziping gneiss is formed by recycling pre-existing crustal components at 2613–2848 Ma. A minor quantity of mantle-derived magma is also introduced to the crust simultaneously. The samples of Qinggangping gneiss and Anziping gneiss show the characteristics of obvious negative Nb, Ti, and P elements in the spider diagram of primitive mantle standardization. This implies that the rocks have the characteristics of magm

关键词： Zircon U–Pb dating Geochemistry Huozhou complex Trans-North China orogen Biotite plagioclase gneiss North China craton

Influencing factors of gas content evaluation for shale gas:a case study of Lower Paleozoic Wuling fold belt in Upper Yangtze Basin

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Global Geology 2014年第1期17卷 18-23页

作者： MIAO Qishi pan baozhi ZHAI Ting YANG Mingyu Logging Engineering Company East China Petroleum BureauSinopec College of Geo-Exploration of Science and Technology Jilin University

Factors of shale gas accumulation can be divided into the external and internal factors,according to accumulation mechanism and characteristics of shale gas. The internal factors mainly refer to parameters of organic geochemistry,mineral components and physical parameters. Six factors were presented in this study,i. e.organic matter,maturity,quartz,carbonate,clay mineral and pore. The external factors mainly refer to geologic environment of shale gas reservoir,including four factors: temperature,pressure,depth and thickness.Based on the experiment results of 26 samples of drilling cores from Wuling fold belt in Lower Paleozoic Silurian of the Upper Yangtze Basin,combined with the integrated analysis of geology,logging and test,the correlation of the gas content of shale gas to the above-mentioned ten factors was concluded. Six important evaluation indicators were preliminarily established in the gas-bearing core area of marine shale in the Upper Yangtze Basin.

关键词：长江上游地区下古生界气体含量页岩气褶皱带评价因素菱内部因素

Study on water saturation computation models in complex pore volcanic reservoir

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Global Geology 2012年第1期15卷 53-57页

作者： BIAN Huiyuan SHI Danhong HAN Shuang pan baozhi ZHANG Lihua College of Geo-Exploration Science and Technology Jilin University Changchun 130026 China No. 2 Well Logging Company Daqing Drilling ＆ Exploration Engineering Corp. Songyuan 138000 Jilin China Research Institute of Exploration and Development Northeast Oil ＆ Gas Branch SINOPEC Changchun 130026 China

Determination of water saturation is important for reservoir evaluation.When complex pore structures such as fracture and cavity are present in reservoir,Archie equation is no longer suitable.According to different models of pore structure division,the authors studied water saturation computation models.The results show that dual porosity system is divided into four models.The first model is based on dual laterolog,the second is Dual Porosity Ⅰ,the third is Dual Porosity Ⅱ,and the last one is based on the conductive pore.Besides,the triple porosity system is triple porosity model.Compute water saturation was using all the above five models in volcanic reservoir in Songnan gas field.The triple porosity system is the most suitable model for water saturation computation in complex pore structure volcanic reservoir.

关键词：火山岩储层水饱和度计算模型孔隙结构孔隙度模型孔隙系统阿尔奇公式油藏评价

Fracture detecting based on Ant Colony Algorithm

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Global Geology 2013年第2期16卷 94-98页

作者： LIU Qianru XUE Linfu pan baozhi ZHANG Cheng'en MA Junming YU Henan QI Caisong College of Earth Sciences Jilin University College of Geo-exploration Science and Technology Jilin University

Image processing plays an important role in engineering treatment. The authors mainly introduced the feature recognition of borehole image process based on Ant Colony Algorithm (ACA). The most important geological structure-fracture on the borehole image was identified, and quantitative parameters were obtained by HOUGH transform. Several case studies show that the method is feasible.

关键词：蚁群算法裂缝检测图像处理特征识别成像过程结构断裂量化参数

基于卷积降噪自编码器和Softmax回归的微地震定位方法

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地球物理学报 2023年第7期66卷 3076-3085页

作者：封强潘保芝韩立国吉林大学地球探测科学与技术学院长春130026

本文提出了一种基于卷积降噪自编码器和Softmax回归的微地震定位方法.该方法首先将微地震数据输入到卷积降噪自编码器中进行随机噪声压制,利用卷积降噪自编码器的编码器提取微地震数据的鲁棒性特征.然后根据震源的地理位置,对每个微地... 详细信息

本文提出了一种基于卷积降噪自编码器和Softmax回归的微地震定位方法.该方法首先将微地震数据输入到卷积降噪自编码器中进行随机噪声压制,利用卷积降噪自编码器的编码器提取微地震数据的鲁棒性特征.然后根据震源的地理位置,对每个微地震数据生成多个独立的位置标签.使用带有震源位置标签的微地震特征训练多输出的Softmax分类器模型,同时预测一个输入微地震数据的多个位置标签,进而获得精确的震源位置.合成地震记录的实验结果表明,该方法能够准确快速地定位低信噪比的微地震事件.

关键词：微地震震源定位卷积降噪自编码器 Softmax回归