1. Accession Number: 20192607106201 Title
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2020/6/21 Print Record(s) 1. Accession 20192607106201 number: Title: Hydrocarbon accumulation conditions of Permian volcanic gas reservoirs in the western Sichuan Basin Title of 四川盆地西部二叠系火山岩气藏成藏条件分析 translation: Authors: Luo, Bing ; Xia, Maolong ; Wang, Hua ; Fan, Yi ; Xu, Liang ; Liu, Ran ; Zhan, Weiyun Author affiliation: Exploration and Development Research Institute, PetroChina Southwest Oil & Gasfield Company, Chengdu; Sichuan; 610041, China Source title: Natural Gas Industry Abbreviated Natur. Gas Ind. source title: Volume: 39 Issue: 2 Issue date: February 25, 2019 Publication year: 2019 Pages: 9-16 Language: Chinese ISSN: 10000976 CODEN: TIGOE3 Document type: Journal article (JA) Publisher: Natural Gas Industry Journal Agency Abstract: In order to figure out the hydrocarbon accumulation conditions of Permian volcaniclastic gas reservoirs in the western Sichuan Basin, we analyzed the hydrocarbon accumulation characteristics of volcaniclastic gas reservoirs in this area in terms of reservoir, gas source, play and trap. It is indicated that the favorable conditions for the hydrocarbon accumulation of volcaniclastic gas reservoirs in the Jianyang area in the western Sichuan Basin are as follows. First, in the Well Yongtan 1, vocaniclastic lava of effusive facies is dominant, and superimposed with late alteration and dissolution, pore-type reservoirs with devitrified dissolution micropores as the main reservoir space are developed. Second, geochemical analysis and comparison on natural gas reveal that the gas of the volcanic gas reservoirs in the Well Yongtan 1 is mainly derived from the Qiongzhusi 1/361 2020/6/21 Print Record(s) Formation of Lower Cambrian. Cambrian quality source rocks of great thickness are developed in Deyang-Anyue rift in the Jianyang area and they provide sufficient gas sources for the formation of gas reservoirs. Third, volcaniclastic reservoirs and Cambrian source rocks constitute a proximal high-efficiency source-reservoir assemblage with reservoir in the upper part and source rock in the lower part, hydrocarbon source faults communicate source rocks with reservoirs effectively, and the direct caprock of Longtan Formation mudstone of Upper Permian and the regional caprock of Triassic gypsum rock are developed. Thus, a good assemblage of source, reservoir and caprock is formed. Fourth, tectonic-lithologic (stratigraphic) composite traps are developed in Chengdu-Jianyang area and their favorable gas bearing area is preliminarily confirmed to be 1 300 km, presenting a great exploration potential of natural gas. In conclusion, the volcaniclastic gas reservoirs in western Sichuan Basin are much different from Zhougongshan basalt gas reservoir in southwestern Sichuan Basin in terms of hydrocarbon accumulation conditions. It is predicted that the distribution area of vocaniclastic rocks in the Zhongjiang-Santai area is over 4 000 km, and their hydrocarbon accumulation conditions of volcanic gas reservoirs are similar to those in the Jianyang area, so this is a favorable area for exploration breakthrough in the next stage. © 2019, Natural Gas Industry Journal Agency. All right reserved. Number of 20 references: Main heading: Petroleum prospecting Controlled terms: Analytical geochemistry - Dissolution - Exploratory geochemistry - Gases - Hydrocarbons - Natural gas - Natural gas wells - Petroleum reservoirs - Stratigraphy - Volcanic rocks - Volcanoes Uncontrolled Favorable exploration area - Gas accumulation - Hydrocarbon terms: sources - Permian - Sichuan Basin - Vocaniclastic lava - Western Sichuan Classification 481.1 Geology - 481.2 Geochemistry - 482.2 Minerals - 484 code: Seismology - 512 Petroleum and Related Deposits - 522 Gas Fuels - 802.3 Chemical Operations - 804.1 Organic Compounds Numerical data Area 1.30e+09m2, Area 4.00e+09m2 indexing: DOI: 10.3787/j.issn.1000-0976.2019.02.002 Database: Compendex Compilation and indexing terms, © 2020 Elsevier Inc. 2. Accession 20192607106211 number: 2/361 2020/6/21 Print Record(s) Title: Risk assessment of drilling site operation based on the structural equation and Monte Carlo Method Title of 基于结构方程与蒙特卡洛方法的钻井现场作业风险评价 translation: Authors: Zhao, Chunlan ; Yin, Huimin ; Wang, Bing ; Fan, Xiangyu ; Wu, Hao Author affiliation: School of Science, Southwest Petroleum University, Chengdu; Sichuan; 610500, China School of Computer Science, Southwest Petroleum University, Chengdu; Sichuan; 610500, China State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu; Sichuan; 610500, China Exploration Division of PertroChina Southwest Oil & Gasfield Company, Chengdu; Sichuan; 610041, China Corresponding Fan, Xiangyu ([email protected]) author: Source title: Natural Gas Industry Abbreviated Natur. Gas Ind. source title: Volume: 39 Issue: 2 Issue date: February 25, 2019 Publication year: 2019 Pages: 84-93 Language: Chinese ISSN: 10000976 CODEN: TIGOE3 Document type: Journal article (JA) Publisher: Natural Gas Industry Journal Agency Abstract: In the risk assessment of drilling site operation, the relevance between monitored data and actual on-site operation is not strong. In view of this, the structural equation model (SEM) integrated with the Monte Carlo Method (MC) was applied as a new methodology to evaluate the on-drilling-site operation risks. First, risk factors were constituted and their relevance and weights were obtained by the SEM, then the key risk factors were determined. Then, the analog values of potential data were got based upon data distribution. Finally, risk degrees were obtained in combination with SEM risk consequence weights and accident consequence degree risk degrees identified from the on-site operation, and were applied in the judgment of risk levels. This methodology was applied in a case study of a well in 3/361 2020/6/21 Print Record(s) a gas field, Sichuan Basin. The following findings were achieved. (1) Compared with the other methods, this new methodology determined the relevance of various factors and disadvantages of each factor weight, providing a new approach for the on-site operation risk assessment. (2) The factors of operation behaviors and environmental considerat ion had little impact on the drilling risks but the man - agement factor was the most influential factor. (3) The two key factors of non-conformity and general equipment defects were determined and their correlation coefficient was 0.57. (4) A series of required sample data was obtained according to the distribution characteristic of each risk variable and probability distribution of drilling risks was thus achieved, which made the assessment results more consistent with the actual situation. In conclusion, this new methodology provides not only a better way to apply the monitored on-site data to evaluate the drilling risk levels, but a reference for risk management i n drilling sites. © 2019, Natural Gas Industry Journal Agency. All right reserved. Number of 24 references: Main heading: Risk assessment Controlled terms: Infill drilling - Monte Carlo methods - Probability distributions - Risk management Uncontrolled Potential variable - Risk degree - Risk factors - Risk levels - terms: Site operations - Structural equation modeling Classification 511.1 Oil Field Production Operations - 914.1 Accidents and code: Accident Prevention - 922.1 Probability Theory - 922.2 Mathematical Statistics DOI: 10.3787/j.issn.1000-0976.2019.02.012 Database: Compendex Compilation and indexing terms, © 2020 Elsevier Inc. 3. Accession 20192206992459 number: Title: Characteristics of multi-scale pore structure of coal and its influence on permeability Title of 煤的多尺度孔隙结构特征及其对渗透率的影响 translation: Authors: Pan, Jienan ; Zhang, Zhaozhao ; Li, Meng ; Wu, Yawen ; Wang, Kai Author affiliation: Institute of Resources & Environment, Henan Polytechnic University, Jiaozuo; Henan; 454000, China Henan Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region, Jiaozuo; 4/361 2020/6/21 Print Record(s) Henan; 454000, China Corresponding Zhang, Zhaozhao ([email protected]) author: Source title: Natural Gas Industry Abbreviated Natur. Gas Ind. source title: Volume: 39 Issue: 1 Issue date: January 25, 2019 Publication year: 2019 Pages: 64-73 Language: Chinese ISSN: 10000976 CODEN: TIGOE3 Document type: Journal article (JA) Publisher: Natural Gas Industry Journal Agency Abstract: Due to the uneven distribution of pore size in coal and its wide distribution range, it is difficult to effectively characterize the multi-scale pore structure of coal by a single method. In this paper, the multi-scale pore structure characteristics of coal were analyzed comprehensively by using scanning electron microscope, low-temperature liquid nitrogen adsorption, high- pressure mercury intrusion and constant-rate mercury intrusion. In addition, the effects of metamorphism on the volume and specific surface area of pores in coal were revealed, and the relationships between coal rock permeability and pore structure characteristic parameters were described. And the following research results were obtained. First, with the increase of coal metamorphism, the volume and specific surface area of nanopores in coal decrease first and then increase, and they reach the minimum value when Ro, max is about 1.8%. Second, the pore and throat radii of coal samples are overall in the form of normal distribution. And with the increase of coal metamorphism, the pore radius corresponding to the maximum distribution frequency increases. Third, the samples