2016年6月，第22卷，第2期，368-377页
Jun 2016,Vol.22,No.2，pp.368377 DOI: 10.16108/j.issn10067493.2015163
高校地质学报
Geological Journal of China Universities
渝东南牛蹄塘组与龙马溪组高演化海相页岩
全孔径孔隙结构特征对比研究
杨满，姜振学，宋岩，黄何鑫，唐相路，纪文明，李卓，王朋飞，陈磊
油气资源与探测国家重点实验室，中国石油大学（北京）非常规天然气研究院，北京102249
捕要：中国南方主要富有机质海相页岩寒武系牛跨塘组和志留系龙马溪组是当前页岩气勘探的重要目标地层，但演化程度普通偏高，孔隙结构复杂。为加深对这种复杂性的认识，
通过场发射扫捕电镜、高压压汞实验与低温低压吸附实验
(CO与N），对页岩全孔径孔隙结构特征进行对比研究。研究发现，牛蹄塘组孔体积与龙马溪组页岩的孔体积分别介于 0.0202~0.0402mL/g与0.0255-0.0310mL/g之间，介孔在两套页岩孔体积中所占比例最大。两套页岩比表面积分别介于 13.74-41.26m/g与21.42-27.82mg之间，微孔与介孔几乎提供了两套页岩全部的比表面。孔隙结构的差异主要表现为牛路塘组页岩内溶蚀孔和粒间孔较为发育，有机质孔隙发育不均匀；而龙马溪组页岩内粒内孔、粒间孔和有机质孔原均较为发育；牛蹄塘组在微孔范围内的孔体积与比表面积占有优势，而介孔与宏孔范围内的孔体积与比表面积均小于龙马溪组。根
据实验数据结果与文献的调研，两套页岩孔隙结构差异的主要原固主要是成熟度与埋深的不同影响面形成的。关键词：页岩气；孔隙结构；全孔径；牛蹄塘组；龙马溪组；差异对比
中图分类号：P588.2
文献标识码：A
文章编号：10067493（2016）02036810
AComparativeStudyonWhole-aperturePoreStructure
CharacteristicsbetweenNiutitangandLongmaxiFormationof High-matruityMarineShalesinSoutheasternChongqingelt YANG Xiao, JIANG Zhenxue, SONG Yan, HUANG Hexin, TANG Xianglu, JI Wenming,
LI Zhuo, WANG Pengfei, CHEN Lei
State Key Laboratory of Petroleum Resources and Prospecting, Institute of Unconventional Natural Gas Research,
China University of Petroleum, Beijing 102249, China
Abstract: The marine organic-rich shales of Niutitang and Longmaxi formation in south China became the key horizons for shale gas exploration. But the thermal evolution degree of the shales is very high and its pore structure is complicated. In order to deepen the
understanding of this complexity, we analyzed the whole-aperture
structure characteristics of two sets shales using a combination
of field-emission environmental scanning electron microscope (FEI-SEM), high-pressu
e mercury injection and low-temperature gas (N:
and CO.) adsorption experiments. Results show that the pore volume of the Niutitang and Longmaxi formation were in the range of 0.02020.0402 mL/g and 0.02550.0310 ml/g, respectively. Mesopores had the largest proportion in two sets of shale pore volume. The average specific surface area of two sets shales were in the range of 13.7441.26 m/g and 21.4227.82 m/g, respeetively. Micropores and mesopores amounted to almost 95% of the specific surface area in shale. The pore structure characteristics of two sets
收稿日期：20150807；修回日期：2015-1007
基全项目：中国地质调查局项目“中国典型更岩气富集机理与综合评价体系”（12120114046201)：国家科技重大专项“页岩气成主控因索研究"
(2011ZX05018-002)：国家自然科学基金项目“更若非均质性和微-纳米孔眼结构对含气性的控创机理”（41472112）联合资联
作者简介：杨谦，男。1991年生，主要从事非常规油气缩层预测与评价方面的研究；E-mail：639649639@qq-com