急倾斜多煤层勘查区煤层层位测井曲线对比研究
|
摘要
急倾斜地层,特别是多煤层的急倾斜地层勘查区,由于地层倾角的变化较大,单纯依靠钻孔取心进行煤层层位对比或利用地震时间剖面同相轴进行煤层层位追踪,效果均不理想。以新疆尼勒克煤田胡吉尔台勘查区为例,在钻探施工方法各异的情况下,通过对各种勘探方法的比较,最终选择误差影响因素较小的自然伽马测井曲线进行煤层层位对比,并找出了该区煤单层、煤层组合及煤岩层组合等自然伽马测井曲线响应特征,如11煤的"上凹下峰"形态,7煤层与9煤层的"手套"形态,16、17、18煤的尖峰与直立组合形态等。根据上述标志层的典型响应特征,采用先走向后倾向的原则,对全区进行煤岩层对比,揭示了该勘查区煤层的分岔、合并、冲刷、沉缺、煤层厚度等变化规律,取得了良好的对比效果。
Since significant changes of strata dip angles in steeply dipping plus multiple coal seam exploration area,simply relying on drilling core coal seam horizon correlation or using seismic time section lineups carrying out horizon tracing will all have no ideal effects.Taking the Hujirtay exploration area,Nilka coalfield,Xinjiang as an example,under situations of different drilling operational methods,after comparison of various exploration methods,finally the natural gamma logging trace with lesser error impacting factors has been selected to carry out coal seam horizon correlation,find out natural gamma logging trace responding features of single coal seam,coal group and coal rock group,such as "concave upper and peak lower" configuration of No.11 coal seam,"glove" configuration of Nos.7 and 9 coal seams,"pinnacle and erect combination" configuration of Nos.16,17 and 18 coal seams.Based on above typical responding characteristics of key beds,using a principle of strike first,dip second,to carry out coal and rock correlation in whole area,successfully reveals variation pattern of coal seam splitting,merging,scouring,absence and coal thickness,have obtained good correlation results.
Since significant changes of strata dip angles in steeply dipping plus multiple coal seam exploration area,simply relying on drilling core coal seam horizon correlation or using seismic time section lineups carrying out horizon tracing will all have no ideal effects.Taking the Hujirtay exploration area,Nilka coalfield,Xinjiang as an example,under situations of different drilling operational methods,after comparison of various exploration methods,finally the natural gamma logging trace with lesser error impacting factors has been selected to carry out coal seam horizon correlation,find out natural gamma logging trace responding features of single coal seam,coal group and coal rock group,such as "concave upper and peak lower" configuration of No.11 coal seam,"glove" configuration of Nos.7 and 9 coal seams,"pinnacle and erect combination" configuration of Nos.16,17 and 18 coal seams.Based on above typical responding characteristics of key beds,using a principle of strike first,dip second,to carry out coal and rock correlation in whole area,successfully reveals variation pattern of coal seam splitting,merging,scouring,absence and coal thickness,have obtained good correlation results.
引文
[1]韦欣,王玲,许孝万.新疆沙尔湖煤田煤层特征及对比[J].中国煤炭地质,2010,22(9).
[2]刘振峰,郝天珧,范国章.沉积旋回的地球物理研究[J].石油实验地质,2004,(3).
[3]常东,高占华,彭鸿鹄,等.测井曲线在准东煤田大井矿区一井田煤层对比中的应用[J].中国煤田地质,2008,20(12).
[4]梁齐瑞,赵世龙,于忙生.自然伽马测井曲线分形形态分析[J].物探与化探,2006,(3).
[5]刘卓立.新疆尼勤克煤田吉伦台-塘坝矿区主采煤层对比探讨[J],2010,29(5).
[6]罗忠文.金沙龙凤煤矿测井曲线特征及其在煤岩层对比中的应用[J].中国煤炭地质,2010,21(5).
[7]谷现平,聂新恕,张树胜自然伽马异常在宣东矿区岩煤层对比中的应用[J].中国煤炭地质,2010,22(z1).
[8]杨为民.高倾角地层地震勘探在新疆尼勒克煤田勘探中的应用[J].中国煤炭地质,2010,18(5).
[2]刘振峰,郝天珧,范国章.沉积旋回的地球物理研究[J].石油实验地质,2004,(3).
[3]常东,高占华,彭鸿鹄,等.测井曲线在准东煤田大井矿区一井田煤层对比中的应用[J].中国煤田地质,2008,20(12).
[4]梁齐瑞,赵世龙,于忙生.自然伽马测井曲线分形形态分析[J].物探与化探,2006,(3).
[5]刘卓立.新疆尼勤克煤田吉伦台-塘坝矿区主采煤层对比探讨[J],2010,29(5).
[6]罗忠文.金沙龙凤煤矿测井曲线特征及其在煤岩层对比中的应用[J].中国煤炭地质,2010,21(5).
[7]谷现平,聂新恕,张树胜自然伽马异常在宣东矿区岩煤层对比中的应用[J].中国煤炭地质,2010,22(z1).
[8]杨为民.高倾角地层地震勘探在新疆尼勒克煤田勘探中的应用[J].中国煤炭地质,2010,18(5).
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心