Tri-media reservoir characteristic of fractured tight gas reservoirof gasfield A,Kuqa Depression,Tarim Basin

Expand
  • 1.Research Institute of Exploration and Development,Tarim Oilfield Company,PetroChina,Korla 841000,China;
    2.Department of Development,Tarim Oilfield Company,PetroChina,Korla 841000,China;
    3.School of Geosciences,China University of Petroleum,Qingdao 266580,China

Received date: 2016-09-20

  Revised date: 2016-12-18

  Online published: 2017-02-10

Abstract

The reservoir of gasfield A,which located in Kuqa Depression of Tarim Basin,has features of large burial depth,and belongs to fractured tight gas reservoir.As the pore-throat is small and the pore structure is complex,it’s difficult to do the pore throat structure characterization by conventional methods.In this paper,lots of advanced technologies,such as LSCM,FESEM,Micro-CT,Nitrogen adsorption and NMR,are used to do the pore throat structure characterization.It’s found for the first time that,the reservoir of gasfield A has microscopic characteristic of tri-media,which contain large pore-throat medium,small pore-throat medium and fractures.The volume of large pore-throat medium approximately equals to the volume of small pore-throat medium,but large pore-throat medium’s contribution to the matrix permeability accounted for 95%.The pore and throat collocations are mainly big pore-coarse throat,small pore-fine throat,and small pore-coarse throat are secondary.Absolute fracture porosity is only about 0.01%-0.5%,1.8%-2.8% of total reservoir porosity,but fracture is main seepage channel of reservoir,the permeability of fractured samples is about 10 times or 100 times of samples without fracture.Based on the research of reservoir characteristics above,the conceptual model of tri-media reservoir is established,which can interpret the reservoir seepage characteristics well.The research idea in this paper will be helpful to other similar reservoir.

Cite this article

Zhao Li-bin,Yang Xue-jun,Chang Lun-jie,Zhang Tong-hui,Sun Xiong-wei,Feng Jian-wei . Tri-media reservoir characteristic of fractured tight gas reservoirof gasfield A,Kuqa Depression,Tarim Basin[J]. Natural Gas Geoscience, 2017 , 28(2) : 209 -218 . DOI: 10.11764/j.issn.1672-1926.2016.12.004

References

[1]Zou Caineng,Zhai Guangming,Zhang Guangya,et al.Formation,distribution,potential and prediction of global conventional and unconventional hydrocarbon resource[J].Petroleum Exploration and Development,2015,42(1):13-24.[邹才能,翟光明,张光亚,等.全球常规—非常规油气形成分布、资源潜力及趋势预测[J].石油勘探与开发,2015,42(1):13-24.]
[2]Zou Caineng,Zhu Rukai,Bai Bin,et al.First discovery of nano-pore throat in oil and gas reservoir in China and its scientific value[J].Acta Petrologica Sinica,2011,27(6):1857-1864.[邹才能,朱如凯,白斌,等.中国油气储层中纳米孔首次发现及其科学价值[J].岩石学报,2011,27(6):1857-1864.]
[3]Bai Bin,Zhu Rukai,Wu Songtao,et al.Multi-scale method of Nano(Micro)-CT study on microscopic pore structure of tight sandstone of Yanchang Formation,Ordos Basin[J].Petroleum Exploration and Development,2013,40(3):329-333.[白斌,朱如凯,吴松涛,等.利用多尺度CT成像表征致密砂岩微观孔喉结构[J].石油勘探与开发,2013,40(3):329-333.]
[4]Yang Feng,Ning Zhengfu,Kong Detao,et al.Pore structure of shales from high pressure mercury injection and nitrogen adsorption method[J].Natural Gas Geoscience,2013,24(3):450-455.[杨峰,宁正福,孔德涛,等.高压压汞法和氮气吸附法分析页岩孔隙结构[J].天然气地球科学,2013,24(3):450-455.]
[5]Lin Tong,Ran Qigui,Wei Hongxing,et al.Pore-throat characteristics of tight sandstones and its influence onreservoirs in Dibei area of the Kuqa Depression[J].Petroleum Geology & Experiment,2015,37(6):696-703.[林潼,冉启贵,魏红兴,等.库车坳陷迪北地区致密砂岩孔喉形态特征及其对储层的影响[J].石油实验地质2015,37(6):696-703.]
[6]Xue Miaomiao,Zhang Haining,Liu Tangyan,et al.Novel Method to quantitatively evaluate pore structures by sphere-cylinder model[J].Well Logging Technology,2014,38(1):59-64.[薛苗苗,章海宁,刘堂宴,等.定量评价储层孔隙结构的新方法[J].测井技术,2014,38(1):59-64.]
[7]Zou Caineng,Tao Shizhen,Hou Lianhua,et al.Unconventional Petroleum Geology[M].Beijing:Geology Press,2013.[邹才能,陶士振,侯连华,等.非常规油气地质[M].北京:地质出版社,2013.]
[8]Zhu Rukai,Bai Bin,Cui Jingwei,et al.Research advances of microstructure in unconventional tight oil and gasreservoirs[J].Journal of Palaeogeography,2013,15(5):615-623.[朱如凯,白斌,崔景伟,等.非常规油气致密储集层微观结构研究进展[J].古地理学报,2013,15(5):615-623.]
[9]Golab A,Knackstedtm,Averdunkh,et al.3D porosity and mineralogy characterization in tight gas sandstones[J].The Leading Edge,2010(12):1476-1483.
[10]Sokrm,Varslott,Ghousa,et al.Pore scale characterization of carbonates at multiple scales:integra-tion of micro-CT,BSEM and FIBSEM:23rd International Symposium of Core Analysts,Noordwijk,The Netherlands[C].New Brunswick Canada:SCA Society of Core Analysts,2009:128-142.
[11]Chen Huanqing,Cao Chen,Liang Shuxian,et al.Research advances on reservoir pores[J].Natural Gas Geoscience,2013,24(2):227-237.[陈欢庆,曹晨,梁淑贤,等.储层孔隙结构研究进展[J].天然气地球科学,2013,24(2):227-237.]
[12]Jiang Ping,Mu Longxin,Zhang Ming,et al.Differences of reservoir characteristics between domestic and oversea tight gas of CNPC and its developing trends[J],Natural Gas Geoscience,2015,26(6):1095-1105.[蒋平,穆龙新,张铭,等.中石油国内外致密砂岩气储层特征对比及发展趋势[J].天然气地球科学,2015,26(6):1095-1105.]
[13]Yang Feng,Ning Zhengfu,Kong Detao,et al.Pore structure of shales from high pressure mercury injection and nitrogen adsorption method[J].Natural Gas Geoscience,2013,24(3):450-455.[杨峰,宁正福,孔德涛,等.高压压汞法和氮气吸附法分析页岩孔隙结构[J].天然气地球科学,2013,24(3):450-455.]
[14]Bi Mingwei,Chen Shiyue,Zhou Zhaohua,et al.Characteristics and significance of microscopic pore structure in tight sandstone reservoir of the 8th member of Lower Shihezi Formation in the Su 6 area of Sulige Gasfield[J].Natural Gas Geoscience,2015,26(10):1851-1861.[毕明威,陈世悦,周兆华,等.鄂尔多斯盆地苏里格气田苏6区块盒8段致密砂岩储层微观孔隙结构特征及其意义[J].天然气地球科学,2015,26(10):1851-1861.]
[15]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,马超压,等.特低渗储层微观孔隙结构参数对渗流行为的影响[J].天然气地球科学,2011,22(3):477-481.]

Outlines

/