柿庄南区块断层发育特征及对煤层气井产能的影响

发布时间：2018-01-20 22:13

本文关键词： 断层煤层气断层泥比率泥岩涂抹潜势　出处：《煤炭科学技术》2017年09期 　论文类型：期刊论文

【摘要】：为了阐明断层封闭性对煤层产气量的控制作用,利用断层泥比率(SGR)与泥岩涂抹潜势(CSP)分析了沁水盆地柿庄南区块3条典型断层的侧向封闭性,在此基础上,分析了煤层气井距断层面的距离与产能之间的相关关系。研究认为,发育规模较小的逆断层(延伸长度2 000 m,断距50m)受到一定的挤压作用,封闭性较好(SGR50%,CSP15 m),井距断层面距离与煤层产气量呈负相关关系;发育规模较大的逆断层(延伸长度5 000 m,断距60 m)所受挤压作用更为强烈,煤储层遭受破坏,封闭性中等(SGR50%,CSP12 m),随井距断层面距离的增加,煤层产气效果逐渐向好;寺头正断层上盘受应力破坏作用较大,使得下盘封闭性优于上盘,且下盘产气效果更好,煤层产气量随井距断层面距离的增加而呈现升高的趋势。
[Abstract]:In order to elucidate the effect of fault sealing on coal seam gas production, the lateral sealing of three typical faults in Shizhuangnan block, Qinshui Basin, was analyzed by using fault gouge ratio (SGR) and mudstone smear potential (CSP). On this basis, the correlation between the distance from the coalbed gas well to the fault plane and the productivity is analyzed. It is concluded that a small scale reverse fault (extension length 2 000 m) is developed. The fracture distance of 50 m) is squeezed, and its sealing ability is better than that of SGR50 and CSP 15 m, and the distance between well spacing and fault plane is negatively related to the gas production of coal seam. The large scale reverse faults (extension length 5 000 m, fault distance 60 m) were squeezed more strongly, coal reservoir was destroyed, and the sealing property of SGR was 50%. With the increase of the distance between the well and the fault plane, the effect of coal seam gas production gradually improved; The upper face of the Sitou normal fault is destroyed by stress, which makes the closure of the lower face better than that of the upper one, and the gas production of the coal seam increases with the increase of the distance between the well and the fault plane.
【作者单位】：中海油研究总院;
【基金】：中国海洋石油总公司科技资助项目(CNOOC-KY125)
【分类号】：P618.13
【正文快照】： 引用格式:邢力仁,柳迎红,王存武,等.柿庄南区块断层发育特征及对煤层气井产能的影响[J].煤炭科学技术,2017,45(9):25-31.XING Liren,LIU Yinghong,WANG Cunwu,et al.Influences of development characteristics of faults on coalbed methane well productivity in South-ern

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