Research into the pore structure of tight reservoirs:A review
CHEN Xiu-Juan1(), LIU Zhi-Di1,2(), LIU Yu-Xi3, CHAI Hui-Qiang3, WANG Yong3
1. College of the Geoscience and Engineering,Xi'an Shiyou University,Xi'an 710065,China 2. Shaanxi Key Laboratory of Petroleum Accumulation Geology,Xi'an Shiyou University,Xi'an 710065,China 3. Longdong Department of Shale Oil Development Project in Changqing Oilfield,PetroChina,Qingyang 745000,China
With the increasing demand for oil and gas resources,the exploration and development of oil and gas fields have shifted from conventional to unconventional fields,and tight oil and gas reservoirs have become the current and future focus of the exploration and development of unconventional oil and gas.Most of the tight reservoirs in China are continental sediments with poor lateral continuity,strong vertical heterogeneity,complex lithology,and large changes in physical properties.All these make it difficult to effectively characterize the pore structure of tight reservoirs.The pore structure of reservoirs not only affects the occurrence of oil and gas but also seriously restricts the seepage and efficient exploitation of oil and gas.To analyze the pore structure characteristics of tight reservoirs in a targeted manner,this study systematically investigates relevant literature on the assessment methods of pore structure of tight reservoirs and organizes indirect measurement methods such as semi-permeable plate,direct observation methods such as casting thin sections,and digital core method.Moreover,it dissects the logging-based assessment methods of the pore structure of tight reservoirs,explores the applicability,advantages,and disadvantages of these methods,and further proposes the development trend of pore structure study based on the current status.
陈秀娟, 刘之的, 刘宇羲, 柴慧强, 王勇. 致密储层孔隙结构研究综述[J]. 物探与化探, 2022, 46(1): 22-31.
CHEN Xiu-Juan, LIU Zhi-Di, LIU Yu-Xi, CHAI Hui-Qiang, WANG Yong. Research into the pore structure of tight reservoirs:A review. Geophysical and Geochemical Exploration, 2022, 46(1): 22-31.
Wang Z L, Mao Z Q, Sun Z C, et al. Evaluation of pore structure using NMR logs for tight oil reservoirs[J]. Fault-Block Oil & Gas Field, 2017,24(6):783-787.
Ning C X, Jiang Z X, Gao Z Y, et al. Quantitative evaluation of pore connectivity with nuclear magnetic resonance and high pressure mercury injection:A case study of the lower section of Es3 in Zhanhua sag[J]. Journal of China University of Mining & Technology, 2017,46(3):578-585.
Zha M, Su Y, Gao C H, et al. Tight reservoir space characteristics and controlling factors:An example from Permian Lucaogou Formation in Jimsar Sag,Junggar Basin,northwest China[J]. Journal of China University of Mining & Technology, 2017,46(1):85-95.
于爽. 萨中开发区储层微观孔隙结构及非均质性研究[D]. 大庆:东北石油大学, 2016.
Yu S. Study on the micro pore structure and heterogeneity of reservoir in central Saertu area[D]. Daqing:Northeast Petroleum University, 2016.
Wang C. Pore structure evaluation and gas water microscopic occurrence mechanism of tight sandstone reservoir in Penglaizhen formation, Western Sichuan[D]. Chengdu:Southwest Petroleum University, 2018.
车荣华. 低渗透油层微观孔隙结构研究[D]. 大庆:东北石油大学, 2016.
Che R H. Study on micro pore structure of low permeability reservoir[D]. Daqing:Northeast Petroleum University, 2016.
Christos D T, Alkiviades C P. Characterization of the pore structure of reservoir rocks with the aid of serial sectioning analysis,mercury porosimetry and network simulation[J]. Advances in Water Resources, 2000,23(7):773-789.
Hao L, Tang J, Wang Q, et al. Fractal characteristics of tight sandstone reservoirs: A case from the Upper Triassic Yanchang Formation,Ordos Basin,China[J]. Journal of Petroleum Science and Engine, 2017,46:80-92.
Wang W M, Lu S F, Tian W C, et al. Liaohe oilfield shale reservoir quality grading with micropore evaluation parameters in Damintun depression[J]. Journal of China University of Petroleum:Edition of Natural Science, 2016,40(4):12-19.
Zhang L H, Xu Y R, Sun M D, et al. The structure and evolution of closed pores in shale determined by small angle neutron scattering[J]. Acta Sedimentologica Sinica, 2021,39(2):1-22.
Ghiasi-Freez J, Soleimanpour I, Kadkhodaie-Ilkhchi A, et al. Semi-automated porosity identification from thin section images using image analysis and intelligent discriminant classifiers[J]. Computers & Geosciences, 2012,45:36-45.
Li Y L, Zhang Y F, Cong L, et al. Application of X-CT scanning technique in the characterization of micro pore structure of tight sandstone reservoir:Taking the Fuyu oil layer in Daan oilfield as an example[J]. Journal of Jilin University:Earth Science Edition, 2016,46(2):379-387.
Kazak A, Chugunov S, Chashkov A, et al. Integration of large-area scanning-electron-microscopy imaging and automated mineralogy petrography data for selection of nanoscale pore-space characterization sites[C]//SPE Res Eval & Eng, 2018,21:821-836.
Yin H S. The application of paleocurrent analysis and reservoir assessment technology to the exploration of sandstone-type uranium deposits[J]. Acta Geologica Sichuan, 2005(3):131-135.
Galaup S, Liu Y, Cerepi A. New integrated 2D-3D physical method to evaluate the porosity and microstructure of carbonate and dolomite porous system[J]. Microporous and Mesoporous Materials, 2012,154(Special Issue:Characterization of Porous Solids IX):175-186.
宋梓语. 塔里木油田克深地区砂岩酸化伤害实验研究[D]. 北京:中国石油大学, 2018.
Song Z Y. Experimental analysis of sandstone formation damage with acidizing treatment in Keshen area(Tarim Oilfield)[D]. Beijing:China University of Petroleum, 2018.
Yao J, Zhao X C, Yi Y J, et al. The current situation and prospect on digital core technology[J]. Petroleum Geology and Recovery Efficiency, 2005,12(6):52-54.
Coenen J, Tchouparova E, Jing X. Measurement parameters and resolution aspects of micro X-ray tomography for advanced core analysis[C]//Abu Dhab:Proceedings of International Symposium of the Society of Core Analysts, 2004:256-261.
Li J S, Wang D, Kang T H. Algorithmic study on rock pore structure based on micro-CT experiment[J]. Chinese Journal of Geotechnical Engineering, 2010,32(11):1703-1708.
Wu K, Nunan N, Crawford J W, et al. An efficient Markov chain model for the simulation of heterogeneous soil structure[J]. Soil Sci. Soc. Am. J., 2004,68(2):346-351.
Dal F N, Delmas P, Duwig C, et al. Coupling X-ray microtomography and mercury intrusion porosimetry to quantify aggregate structures of a cambisol under different fertilisation treatments[J]. Soil and Tillage Research, 2012,119:13-21.
Dernaika M, Efnik M S, Koronful M S, et al. Evaluation of water saturation from laboratory to logs and the effect of pore geometry on capillarity[C]//Abu Dhabi:SPWLA Middle East Regional Symposium, 2007.
陈杰. 基于电阻率测井资料研究致密砂岩孔隙结构特征[D]. 成都:西南石油学院, 2005.
Chen J. Study on pore structure characteristics of tight sandstone based on resistivity logging data[D]. Chengdu:Southwest Petroleum University, 2005.
Carlos A, Grattoni. The effect of differences of multiphase spatial distributions on the electric properties of porous media[J]. Log Analyst, 1998,39(4):47-57.
况晏. 致密砂砾岩储层孔隙结构及饱和度测井评价方法研究[D]. 成都:西南石油大学, 2018.
Kuang Y. Study on the well logging evaluation method of pore structure and saturation in the tight sandy conglomerate reservoirs[D]. Chengdu:Southwest Petroleum University, 2018.
Ge X, Fan Y, Cao Y, et al. Reservoir pore structure classification technology of carbonate rock based on NMR T2 spectrum decomposition[J]. Applied Magnetic Resonance, 2014,45(2):155-167.
Wang X W, Yang Z M, Li H B, et al. Experimental study on pore structure of low permeability core with NMR spectra[J]. Journal of Southwest Petroleum University:Science & Technology Edition, 2010,32(2):70-72.
Chen G J, Gao M, Li J, et al. Application of NMR well logging to evaluating porous structure of tight oil reservoir[J]. Natural Gas Exploration & Development, 2014,37(2):41-44.
Huang X, Li A, Li X, et al. Influence of typical core minerals on tight oil recovery during CO2 flooding using NMR technique[J]. Energy & Fuels, 2019,33(8):7147-7154.
Yakov V. A practical approach to obtain drainage capillary pressure curves from NMR core and log data[J]. Petrophysics, 2001,4:334-343.
Tong M S. The regularization inversion of induced polarization relaxation time spectrum of agrillaceous sand[J]. Geophysical and Geochemical Exploration, 2015,39(1):186-191.
Eslami M, Kadkhodaie A, Sharghi Y, et al. Construction of synthetic capillary pressure curves from the joint use of NMR log data and conventional well logs[J]. Journal of Petroleum Science & Engineering, 2013,111(11):50-58.
Liang X, Zou C C, Mao Z Q, et al. An empirical approach of evaluating tight sandstone reservoir pore structure in the absence of NMR logs[J]. Journal of Petroleum Science & Engineering, 2015,137:227-239.
陈文祥. 致密砂岩油藏孔隙特征与衰竭式开采实验研究[D]. 北京:中国地质大学, 2019.
Chen W X. Experimental investigation of tight oil pore characteristic and depletion[D]. Beijing:China University of Geosciences, 2019.
Zhang M M, Liang L X, Jiang S L. Influence of different pore structures of carbonate rock on time and frequency characteristics of acoustic wave spread[J]. Fault-Block Oil & Gas Field, 2016,23(6):825-828.