气田开发

致密砂岩气藏开发传质过程的时间尺度研究

展开
  • (1.西南石油大学油气藏地质及开发工程国家重点实验室油井完井技术中心 ,四川 成都 610500;2.中国石化西南分公司博士后科研工作站,四川 成都 610081)
李前贵(1979-),男,湖南桑植人,博士后,从事非常规天然气开发、油气层损害与保护技术研究.

收稿日期: 2006-09-04

  修回日期: 2006-12-14

  网络出版日期: 2008-06-20

基金资助

中国石油天然气股份有限公司科技风险创新研究项目;四川省青年科技基金项目(编号 :02ZQ026-042)联合资助.

STUDY ON TEMPORAL SCALES OF MASS TRANSFER PROCESSES IN DEVELOPING TIGHT SANDSTONE GAS RESERVOIRS

Expand
  • (1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Sout hwest Petroleum University,  Chengdu 610500, China; 2. Postdoctoral Research Cen ter, Southwest Branch, SINOPEC, Chengdu 610081, China)
     

Received date: 2006-09-04

  Revised date: 2006-12-14

  Online published: 2008-06-20

摘要

致密砂岩储层在空间上具有强烈的尺度性,包括致密基块孔喉尺度、天然裂缝尺度、水力缝尺度以及宏观气井尺度,这种多尺度结构对气藏流体在储层空间分布和流动中起控制作用。致密砂岩气藏开发传质过程包括基块孔喉尺度的解吸、扩散和渗流,还有天然裂缝和水力裂缝尺度的渗流。气体在不同空间尺度中的流动具有时间效应,在裂缝中流动较快,在孔隙和喉道中流动较慢,而微孔中的扩散更慢,且易受外界环境变化的影响。基于4种尺度下气体的传质过程,推导了各个尺度下不同传质过程的特征时间计算公式,得到了对应空间尺度下的时间尺度范围,结果表明,基块中的扩散和渗流过程在时间尺度上分别为101~1010s和100~106s,而天然裂缝和人工裂缝中在时间尺度上为10-2~101s。指出致密砂岩气藏开发要注意储层保护与改造并举,采用特殊结构井、多层合采井和钻加密井等技术。

本文引用格式

李前贵,康毅力,杨 建,张 浩,游利军 . 致密砂岩气藏开发传质过程的时间尺度研究[J]. 天然气地球科学, 2007 , 18(1) : 149 -153 . DOI: 10.11764/j.issn.1672-1926.2007.01.149

Abstract

Tight sandstone gas reservoirs are characterized by strong Spatial Scales, including matrix pore and throat scale, natural fracture scale, hydraulic fracture scale, and macro gas well scale. The distribution and flow of fluids are controlled by this multi-scale structure in the gas reservoirs. Mass transfer processes in the tight sandstone gas reservoirs consist of desorption, diffusion and percolation in the matrix pore and throat scale, and percolation in the natural fracture and hydraulic fracture scales. Gas flow in different scales has time scale effect and is easily influenced by circumstance changes. Gas percolation is faster in fractures and slower in pores and throats, and gas diffusion in matrix is the slowest. Based on the gas mass transfer processes in four spatial scales in tight sandstone gas reservoirs, formulae for calculating the characteristic time of the different modes of gas transfer in different scales are derived, and the ranges of spatial and temporal scales are specified. Results show that the time scales of matrix gas diffusion and percolation are 101~1010 seconds and 100~106 seconds, and the time scale of natural fracture and hydraulic fracture scales is 10-2~101 seconds. Such time effects result in lack of gas supply from tight matrix to natural fractures. Therefore, employing both damage control and stimulation should be emphasized, and using special wells, multilayercommingled production and infilling wells will promote the economic exploitation of tight sand gas reservoirs.

参考文献

[1]  陈,黄庭芳.岩石物理学[M].北京:北京大学出版社,2001.   
[2] 朱九成,郎兆新,张丽华.多尺度油藏数值模拟的渗滤方法[J].石油 学报,1998,19(2):49-53.   
[3]  Noetinger B, Zargar G. Multiscale description and upscaling of flui d flow in subsurface reservoirs[J]. Oil & Gas Science and Technology Rev IFP,  2004,59(2):119-139. 
 [4]  Radlinski A P, Ioannidis M A, Hinde A L. Multiscale characterization of reservoir rock microstructure: combining small-angle n eutron scattering and image analysis[R].SCA2002-35, Annual Symposium of the S ociety of Core Analysts, Monterey, California, 2002:23-27.  
 [5]  Tayfun Babadagli. Evaluation of outcrop fracture patterns of geothe rmal reservoirs in southwestern turkey[C]//Proceedings World Geothermal Congre ss, Kyushu-Tohoku, 2000.  
[6]  Kang Yili, Luo Pingya, Xu Jin, et al. Employing both dam- age control and stimulation: a way to successful development for tight gas s andstone reservoirs[C]//Paper SPE 64707 presented at the SPE international Oil  and Gas Conference and Exhibition in China held in Beijing, China, 2000.  
[7] 李前贵,康毅力,罗平亚.致密砂岩气藏多尺度效应及生产机理[J]. 天然气工业,2006,26(2):111-113.   
[8]  李前贵,康毅力,罗平亚.致密砂岩气藏的时间尺度和空间尺度分析[C]// 程林松,单文文,等.资源、环境与渗流力学——第八届渗流力学学术讨论会论文集.北京 :中国科学技术出版社,2005:186-192.   
[9]  张浩,康毅力,陈一健,等.致密砂岩气藏超低含水饱和度形成地质过程及实 验模拟研究[J].天然气地球科学,2005,16(2):482-486.  
[10]  李小彦,解光新.孔隙结构在煤层气运移过程中的作用——以沁水盆地为例[J]. 天然气地球科学,2004,15(4):341-344.  
[11]  康毅力,张浩,陈一健,等.鄂尔多斯盆地大牛地气田致密砂岩气层应力敏感性综 合研究[J].天然气地球科学,2006,17(3):335-338,344.

 

文章导航

/