气田开发

致密砂岩凝析气藏微观结构及渗流特征

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  • 1.北京科技大学土木与环境工程学院,北京 100083;2.中国石油勘探开发研究院廊坊分院,河北 廊坊 065007; 3.华北油田勘探开发研究院,河北 任丘 062552
田巍(1981-),男,河南太康人,工程师,博士,主要从事油气田开发、三次采油技术等方面的研究.

收稿日期: 2013-11-12

  修回日期: 2013-12-05

  网络出版日期: 2014-07-10

基金资助

国家科技重大专项 (编号:2011ZX05051);国家重点基础研究发展计划“973”项目(编号:2013CB228002) 联合资助.

The Micro-structure and Seepage Characteristics of Condensate Gas Reservoir for Tight Sandstone

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  • 1.School of Civil and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China; 2.Langfang Branch,PetroChina Research Institute of Petroleum Exploration and Development,Langfang 065007,China; 3.Institute of Exploration and Development,North China Oilfield,Renqiu 062552,China

Received date: 2013-11-12

  Revised date: 2013-12-05

  Online published: 2014-07-10

摘要

为了搞清吐哈油田凝析气藏致密岩心的储层特征和两相渗流规律,基于恒速压汞原理研究了微观结构特征,并利用稳压安全阀设计出一套稳态法相渗实验流程开展真实油气相渗曲线研究。研究表明:孔隙半径分布因渗透率不同而差别较大;平均喉道半径、主流喉道半径和最大喉道半径随渗透率的增加而增加,喉道半径主要分布在0.6μm左右,渗透率受喉道控制,且主要由微细喉道贡献;孔喉连通性差,排驱压力高,开发难度大;束缚水饱和度较高,相渗曲线存在气体单相流动区和液体单相流动区;气相相对渗透率随着含液体饱和度增加下降速度较快;共渗区跨度平均为13.7%,等渗点相对渗透率平均为0.015;油相相对渗透率曲线较低,因此,合理控制生产压差对凝析油气开采具有重要意义。

本文引用格式

田巍,朱维耀,朱华银,邓佳,安来志,杜珊 . 致密砂岩凝析气藏微观结构及渗流特征[J]. 天然气地球科学, 2014 , 25(7) : 1077 -1084 . DOI: 10.11764/j.issn.1672-1926.2014.07.1077

Abstract

Based on constant speed mercury injection technology and two phase percolation theory, the micro-pore structure and relative permeability curve with the steady-state method of Tuha oil/gas field condensate gas reservoir of tight sandstone core were investigated.The result shows that the core pore radius is mainly less than 230μm, and the throat is mainly smaller than 0.6μm.Permeability is mainly controlled by throat, especially the micro-throat.The poor connectivity between pore and throat, leads to the weak seepage ability.Therefore, it belongs to poor reservoir.The relative permeability curve includes gas and liquid single-phase flow zones,which is decided by the characteristics of tight sandstone micro-structure.In addition, gas phase relative permeability declines fast with the increase of liquid saturation.Two-phase flow zone is very narrow, the relative permeability value of equal-permeability point is averaged at 0.015. Oil phase relative permeability curve is relatively low.Therefore,it is important to control production pressure difference reasonably in the process of production.

参考文献

[1]Federal Energy Regulatory Commission.Natural gas policy act[JP] of 1978[S].Michigan:American Enterprise Institute Policy Research,1980:340-346.
[2]Standardization Committee of Petroleum Geology.SY/T6832-2011 Geological Evaluating Methods for Tight Sandstone Gas[S].Beijing:China Standards Press,2011:1-10.[石油地质勘探专业标准化委员会.SY/T6832-2011致密砂岩气地质评价方法[S].北京:中国标准出版社,2011:1-10.]
[3]Hu Junkun,Li Xiaoping,Song Daishiyu.A new method for dynamic reserves evaluation of water-drive gas reservoir[J].Natural Gas Geoscience,2013,24(3):628-832.[胡俊坤,李晓平,宋代诗雨.水驱气藏动态储量计算新方法[J].天然气地球科学,2013,24(3): 628-832.]
[4]Wang Jieming,Guo Ping,Jiang Fengguang.The physical simulation study on the Gas-drive multiphase flow mechanism of aquifer gas storage[J].Natural Gas Geoscience,2006,17(4):597-600.[王皆明,郭平,姜凤光.含水层储气库气驱多相渗流机理物理模拟研究[J].天然气地球科学,2006,17(4):597-600.]
[5]Guo Ping,Jiang Bin,Du Jianfen,et al.Research and application of correction method for oil/gas relative permeability curve in low-permeability condensate reservoirs[J].Natural Gas Industry,2008,28(12):78-80.[郭平,姜彬,杜建芬,等.低渗凝析气藏油气相渗曲线校正方法及其应用[J].天然气工业,2008,28(12):78-80.]
[6]Liu Zhenxing,Wang Lezhi,Xiao Yi,et al.Comparison research between oil and gas relative permeability of Qiaokou condensate gas reservoir in the Dongpu Depression of the Bohai Basin[J].Petroleum Geology& Experiment,2009,31(1):105-108.[刘振兴,王乐之,肖毅,等.渤海湾盆地东濮凹陷桥口凝析气藏油—气相渗对比研究[J].石油实验地质,2009,31(1):105-108.]
[7]Su Chang,Guo Ping,Li Shilun,et al.Influence of gas oil permeab-ility and gas condensate permeability curve on gas condensate recovery[J].Offshore Oil,2003,23(2):41-44.[苏畅,郭平,李士伦,等.凝析气藏中替代相渗和真实相渗曲线差别对油气采收率的影响[J].海洋石油,2003,23(2):41-44.]
[8]Guo Xiao,Shu Zhuangzhi,Guo Ping,et al.Using condensate gas to survey relative permeability of condensate reservoirs[J].Natural Gas Industry,2004,24(2):82-84.[郭肖,疏壮志,郭平,等.采用凝析油气测量凝析气藏相对渗透率[J].天然气工业,2004,24(2):82-84.]
[9]Wei Hu,Su Guohui,Ren Dazhong,et al.Characteristics of Micro-pore Structure and its influence on gas-water seepage of P1s2 Formation in Yanqi 2 block,Yanchang Gasfield[J].Science Tech-nology and Engineering,2013,13(21):6076-6081.[魏虎,苏国辉,任大忠,等.延长气田延气2井区山2段微观孔隙结构特征及其对气水渗流规律的影响[J].科学技术与工程,2013,13(21): 6076-6081.]
[10]Luo Zhetan,Wang Yuncheng.The Pore Structure of Oil/Gas Rese-rvoir[M].Beijing:Science Press,1986.[罗蛰谭,王允诚.油气储集层的孔隙结构[M].北京:科学出版社,1986.]
[11]Wang Jie,Qin Jianzhong,Rao Dan,et al.Microstructure and simu-lation experiments of extracted gas capability in different types of shale[J].Natural Gas Geoscience,2013,24(4):652-658.[王杰,秦建中,饶丹,等.不同类型页岩富集烃气能力模拟实验及微观结构特征研究[J].天然气地球科学,2013,24(4):652-658.]
[12]Dullien F A L.Porous Media,Fluid Migration and Pore Structure[M].Beijing:Petroleum Industry Press,1990:8.[Dullien F A L.多孔介质:流体渗移与孔隙结构[M].北京:石油工业出版社,1990:8.]
[13]Shi Yu.Study on the Reservoir Character and SeePage Flow of different Types of reservoir in HaiUar-Tamuchage Basin[D].Langfang:Institute of Porous Flow  & Fluid Mechanics,Chinese Academy of Sciences,2008.[时宇.海拉尔塔木察格盆地不同类型油藏储层特征及渗流规律研究[D].廊坊:中国科学院渗流流体力学研究所,2008.]
[14]Wang Ruifei,Chen Mingqiang,Sun Wei.Classification and evalu-ation of micropore structures in the ultra-low permeability sandstone reservoir[J].Acta Geoscientica Sinica,2008,29(2):213-220.[王瑞飞,陈明强,孙卫.特低渗透砂岩储层微观孔隙结构分类评价[J].地球学报,2008,29(2):213-220.]
[15]Yang Zhengming,Zhang Yingzhi.Comprehensive evaluation method of low permeability oil field reservoir[J] Acta Petrolei Sinica,2006,27(2):64-67.[杨正明,张英芝.低渗透油田储层综合评价方法[J].石油学报,2006,27(2):64-67.] 
[16]He Wenxiang,Yang Le,Ma Chaoya,et al.Effect of micro-pore structure parameter on seepage characteristics in ultra-low permeability reservoir:A case from Chang 6 Reservoir of Ordos Basin[J].Natural Gas Geoscience,2011,22(3):477-481.[何文祥,杨乐,马超亚,等.特低渗透储层微观孔隙结构参数对渗流行为的影响——以鄂尔多斯盆地长6储层为例[J].天然气地球科学,2011,22(3):477-481.] 
[17]Liao Jianbo,Liu Huaqing,Lin Weidong.Low permeable sands tone reservoir characteristics and diagenes is of Chang6,Chang7 and Chang8 Formation of the Yanchang Formation(Triassic),Shancheng-Yanwu area,Ordos Basin[J].Natural Gas Geoscience,2006,17(5):682-687.[廖建波,刘化清,林卫东.鄂尔多斯盆地山城—演武地区三叠系延长组长6—长8低渗储层特征及成岩作用研究[J].天然气地球科学,2006,17(5):682-687.]
[18]National Development and Reform Commission.SY/T5345-2007 Test Method of Two Phase Relative Permeability in Rocks[S].Beijing:Petroleum Industry Proess,2007:7-9.[国家发展和改革委员会.SY/T 5345-2007,岩石中两相流体相对渗透率测定方法[S].北京:石油工业出版社,2007:7-9.]

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