CAJ | 학술논문

该文提出一种在南图尔盖盆地已被应用，适合陆相盆地探井地层划分、对比的新形式--“浓缩”伽玛曲线。浓缩伽玛曲线是经过纵向压缩和横向放大处理的曲线，纵向上显示曲线“错断”和自然分段。自然段划分以浓缩线的趋势连续性为依据，结合其它测井信息并通过地震地层分界的验证产生。经过分析，每个自然段对应“组”地层，实际代表了与构造沉降有关的沉积旋回、A/S配置特征；分界则与地震剖面上的“地层界面”吻合，实际代表了地层超覆、地层削蚀，新一轮沉积或新的物源等信息。
해문제출일충재남도이개분지이피응용，괄합륙상분지탐정지층화분、대비적신형식--“농축”가마곡선。농축가마곡선시경과종향압축화횡향방대처리적곡선，종향상현시곡선“착단”화자연분단。자연단화분이농축선적추세련속성위의거，결합기타측정신식병통과지진지층분계적험증산생。경과분석，매개자연단대응“조”지층，실제대표료여구조침강유관적침적선회、A/S배치특정；분계칙여지진부면상적“지층계면”문합，실제대표료지층초복、지층삭식，신일륜침적혹신적물원등신식。
A new approach, condensed gamma curve, that is appropriate for stratigraphic division and correlation of exploratory wells in continental basins is proposed in this paper, and has been applied in the southern Turgay basin. The condensed gamma curve is compressed vertically and magnified transversely to show curve dislocations and the natural segmentations. Natural segmentations are determined based on trend continuity of condensed gamma curve and other logging information, and are verified by bed boundaries on seismic profiles. Analyses reveal that each natural section corresponds to“group formation”, and practically presents a sedimentary cycle related to tectonic subsidence and A/S configuration. And its boundary coincides with the stratigraphic dividing line on seismic profiles, and practically represents stratigraphic overlap, denudation, and the next deposition or change in sources.