| 基于SPAC法探测松科二井深层地热储水构造 |
| 点此下载全文 |
| 引用本文：应恒成,李洪强,张玉敏,靳中原,张家铎,符伟,高磊,安栋召,潘宗栋,汪伟,侯贺晟.2022.基于SPAC法探测松科二井深层地热储水构造[J].地球学报,43(6):909-916. |
| DOI：10.3975/cagsb.2022.053001 |
| 摘要点击次数: 689 |
| 全文下载次数: 1108 |
|
| 基金项目:中国地质调查局项目“松嫩地块及周缘关键区带深部地质调查”(编号: DD20190010);“黑吉蒙关键区带深部地质调查”(编号: DD20221643-2);黑龙江省自然资源调查院项目“松科二井周边地区清洁能源潜力研究”(编号: HX2020-23) |
|
| 中文摘要:微动探测技术作为一种获取地下地层速度结构和探测隐伏断裂构造的方法, 具有无须人工源、勘测过程便捷、抗干扰能力强的优势, 在城市、村庄浅层勘探中很受青睐。为进一步探索松辽盆地北部深层地热资源潜力, 在黑龙江省安达市南部松科二井及周边, 布设了一条微动探测剖面, 以获取该区嫩江组至坳陷层底部登娄库组地层的横波速度结构。基于空间自相关法(SPAC)从微动信号的垂直分量中提取S波频散曲线, 通过内插、光滑与反演计算, 获得了一条长9 km、探测深度达到地下4000 m的二维S波速度结构剖面。探测结果表明: 研究区地下S波速度总体呈现西高东低的趋势, 在松科二井西侧100 m、东侧2300 m、东侧3700 m处, 深度1400~2800 m范围内存在三个明显的低速异常带, 推测这些位置很可能存在断层或隐伏断裂构造。结合地层分层资料, 在该深度范围内以泉头组和登娄库组为主, 岩性多为砂岩和泥岩互层, 是良好的水热储层。本研究探索了基于空间自相关法的微动探测在识别深层地热储水构造的适用性, 为松辽盆地北部清洁能源调查指明方向。 |
| 中文关键词:微动探测 地热资源 空间自相关法 松科二井 视S波速度 |
| |
| Application of SPAC Method to Survey Deep Geothermal Water Storage Structures in SK-2 |
|
|
| Abstract:As a method for acquiring the velocity structure of underground strata and hidden structural faults, microtremor surveying is very popular for shallow exploration in cities and villages because of its advantages of no active source, convenient survey process, and strong anti-interference ability. To explore the deep geothermal resource potential of the northern Songliao Basin in greater detail, the subsurface fine velocity structure within the burial depth range from the Nenjiang Formation to the Denglouku Formation at the bottom of the depression was obtained by using the micro motion detection method in and around Songke Well No. 2 (SK-2) south of Anda City, Heilongjiang Province. Based on the spatial autocorrelation method (SPAC), the S-wave dispersion curve was extracted from the vertical component of the micro motion signal and transformed into the apparent S-wave velocity curve. Finally, through interpolation and smooth calculation, a two-dimensional underground S-wave velocity structure section spanning 9 km and reaching 4000 m beneath the surface was obtained. Analysis of the micro motion profile revealed that the subsurface S-wave velocity generally shows a trend of high velocity in the west and low velocity in the east. There are three obvious low-speed anomaly zones with depths ranging from 1400 m to 2800–100 m in the west, 2300 m in the east, and 3700 m to the east of well SK-2—indicating that there are likely faults or hidden fault structures at these locations. By combining these data with the stratigraphic data, the Quantou and Denglouku Formations were determined as the main units in this depth range, and the lithology is mostly interbedded sandstone and mudstone. These are suitable units for hydrothermal storage. The study shows that the lateral low-velocity anomaly of the surface wave results can be used as a basis of discrimination for identifying deep geothermal water storage structures and can provide direction for further clean energy investigation in this area. |
| keywords:microtremor survey geothermal resources SPAC well SK-2 apparent S-wave velocity |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
|
|
