The Longtan1 well and Longtan2 well revealed metamorphic rock reservoirs, seeing a good natural gas display. Through comprehensive lithology identification, The lower part of the basement of LT1 is mica schist, the original rock is clastic rock; the middle part is granitic mylonite; the upper end is green schist whose original rock is andesite. The lower section of LT2 is a mylonitic granite. Using high pressure mercury and nitrogen adsorption, the average pore diameter of schist and mylonite is not much different, the schist throat is thinner and the sorting is poor; the mylonite throat is thicker and the sorting is better. The schist is a type Ⅱ isotherm, and the B-type hysteresis loop reflects the pores as slit-like capillary pores; the mylonite is a type Ⅲ isotherm, and the D-type hysteresis loop reflects that it is a pointed ridge with four sides open. Porosity. Compared with mylonite, schist has large adsorption capacity and large specific surface area. The average pore size is smaller than 100 nm and larger than the pore volume. It reflects that it has more pores than schist and larger pore volume, but the pores are smaller and the pore structure is complex.
类型: 国际会议
作者: ZENG Zhouqiang,ShAN Xuanlong
来源: 第九届世界华人地质科学研讨会 2019-06-01
年度: 2019
分类: 基础科学,工程科技Ⅰ辑
专业: 地质学,石油天然气工业
单位: Jilin University
分类号: P618.13
DOI: 10.26914/c.cnkihy.2019.028314
页码: 71
总页数: 1
文件大小: 56k
下载量: 1
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