收稿日期: 2013-08-29
修回日期: 2013-10-06
网络出版日期: 2014-09-10
基金资助
Assessment of the Movable Water in Heterogeneous Gas Reservoir and New Thoughts of Enhancing Gas Recovery
Received date: 2013-08-29
Revised date: 2013-10-06
Online published: 2014-09-10
高大鹏,孙敬,韩晓红,郑金定,黄敏 . 非均质气藏可动水评价及提高采收率新思路[J]. 天然气地球科学, 2014 , 25(9) : 1437 -1443 . DOI: 10.11764/j.issn.1672-1926.2014.09.1437
For the gas reservoir utilizing exhausting way to develop,it is a serious problem that wells stop production or shut down because of water flooding,so it is important to evaluate the movable water of high water content gas reservoir for managing and enhancing gas recovery.The study takes the heterogeneous gas reservoir with bottom water in Tarim Basin as an example,and then tests the cores′ water saturation and movable water saturation and irreducible water saturation,and takes comparative analysis with permeability and porosity.Finally,we find that movable water saturation and water saturation have the same trends in the same core under different flooding pressure,and they are bigger in cores with higher permeability.They decrease rapidly with the increase of flooding pressure when they are at high value,and they decrease slowly with the increase of flooding pressure when they are at low value.Their variation range differentiates in different block with different characteristics.Based on the assessment of movable water and the distribution of residual gas and water,this study puts forward the new thought of enhancing gas recovery by utilizing fine geological model and numerical simulation,through reinforcing well net controlling degree and sealing advantaged seepage channel and decreasing the water energy,designs the improvement project with gas wells,obstacle wells and drainage wells.
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