CAJ | 학술논문

煤体结构类型与煤储层孔裂隙特征密切相关，对煤层气开采具有重要意义。以韩城矿区为例，通过对区内的参数井取心样品分析，把煤体结构分为块煤(I类)、块粉煤(II类)、粉煤(III类)。对区内3号、5号和11号煤层的深侧向电阻率测井、井径测井和自然伽玛测井曲线特征进行对比，归纳了各煤体结构的测井曲线组合特征：I和III类煤电阻率曲线和自然伽玛曲线为平滑的箱型或钟形，II类煤则为波动的箱形；II和III类煤扩径严重，且II类煤差异扩径明显。据此，提出了一种利用电阻率测井、井径测井和自然伽玛测井等测井曲线组合识别煤体结构的方法，并利用这种方法准确识别出同一煤层不同煤体结构的分层。
매체결구류형여매저층공렬극특정밀절상관，대매층기개채구유중요의의。이한성광구위례，통과대구내적삼수정취심양품분석，파매체결구분위괴매(I류)、괴분매(II류)、분매(III류)。대구내3호、5호화11호매층적심측향전조솔측정、정경측정화자연가마측정곡선특정진행대비，귀납료각매체결구적측정곡선조합특정：I화III류매전조솔곡선화자연가마곡선위평활적상형혹종형，II류매칙위파동적상형；II화III류매확경엄중，차II류매차이확경명현。거차，제출료일충이용전조솔측정、정경측정화자연가마측정등측정곡선조합식별매체결구적방법，병이용저충방법준학식별출동일매층불동매체결구적분층。
The type of coal structure which is very important for CBM exploitation, is closely related to the pore and fracture characteristics of coal reservoir. Taking Hancheng area as an example, based on the analysis of core samples of parameter wells, coal structure was divided into three groups, which are: lump coal(class I), lump-powder coal(class II)and powder coal(class III). According to the analogy of resistivity logs, caliper logs and natural gamma logs of NO.3, 5 and 11 coal seams, the relationship between well logs and coal structures in the study area was established:The form of resistivity logs and natural gamma logs of class I and III was smooth box or bell-shaped, while the logs of class II fluctuated strongly;Diameter extension of class II and III was serious and the diameter extension of class II was inhomogeneous. Thus, a method to identify coal structure through using re-sistivity logging, caliper logging and natural gamma logging is proposed in this paper, and based on this relation-ship, some stratifications in different coal structures in the same coal seam were also identified exactly.