Fundamental Design Methogology for Geothermal Energy Extraction -Establishment of Fractal Fracture Mechanics and Its Application-

地热能开采基础设计方法-分形断裂力学的建立及其应用-

基本信息

批准号：
05232101
负责人：
NAKATSUKA Katsuto
金额：
$ 29.12万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research on Priority Areas
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1995
项目状态：
已结题

项目摘要

The objective of the present research program is to develop a numerical model for predicting long-term performance of thermal extraction from geothermal reservoirs. The research program consists of the following major subjects, and three research group (RG) are formed to examine each research subject :(1) Characterization of subsurface natural fracture networks based on fractal geometry (RG : A01)(2) Modeling of mechanical responses of fracture-type rock mass stimulated by hydraulic fracturing (RG : A02)(3) Characterization of water-rock interaction (RG : A03)The following results are obtained from the RG activities. Firstly, a fractals-based method has been worked out which allows the generation of a 3D fracture network using a well logging data obtained from the reservoir considered. Then, numerical models have been developed to analyze the mechanical behavior of the geothermal reservoir during hydraulic stimulation process, steady state fluid flow at circulation stage, and heat extr … More action through the fractured rock mass, based on the generated fractal fracture network and the inputs measurable from field data. The numerical model of hydraulic stimulation allows to take into account the shear displacements of the stimulated fracture as well as the openings at a given treatment pressure, and to calculate the amount of fluid needed to stimulate a given volume of rock. The numerical models allows to predict the shape of the stimulated region, the recovery rate of circulating fluid, and then the long-term temperature variation of produced fluid. Finally, we have established a computer simulation model for predicting long-term performance of thermal extraction from a fracture network type geothermal reservoir, on the basis of the above-mentioned fundamental results. The model has been applied to examine the effect of geothermal reservoir size on the thermal output. International co-operative joint research programs have also been conducted to support the present study.Three international symposia have been held to disseminate our research results in addition to annual research group meeting. Furthermore, we have issued ten news-letters to facilitate the information change within the research groups. Less

本研究计划的目的是开发一个数值模型，以预测地热储量中热萃取的长期性能。该研究计划由以下主要受试者组成，并成立了三个研究组（RG）来检查每个研究主题：（1）基于分形几何形状（RG：A01）（2）对机械响应的机械响应的模型（RG：A02）（RG：A02）（RG：3）（RG：3）（RG：3）（RG：3）（RG：3）从RG活动中获得以下结果。首先，已经制定了一种基于分形的方法，该方法允许使用从所考虑的储层中获得的良好记录数据生成3D断裂网络。然后，已经开发出数值模型来分析水力刺激过程中地热储量的机械行为，循环阶段的稳态流体流量以及热量量表……基于生成的分形裂纹网络以及可从现场数据测量的输入，通过断裂的岩体质量进行了更多的作用。水解模拟的数值模型允许考虑刺激断裂的剪切位移以及给定处理压力下的开口，并计算刺激给定岩石所需的流体量。最后，我们建立了一个计算机仿真模型，以根据上述基本结果来预测裂缝网络型地热储层的热萃取的长期性能。该模型已应用于检查地热储层尺寸对热输出的影响。国际合作研究计划还进行了支持，以支持本研究。除了年度研究小组会议外，还举行了第三次国际研讨会来传播我们的研究结果。此外，我们已经发布了十个新闻通信，以促进研究小组内的信息变化。较少的

项目成果

期刊论文数量（79）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

M.Takayasu, Y-h.Taguchi and H.Takayasu: "Non-Gaussian distribution in random transport dynamics" Inter.J.Modern Phys.B. 8. 3887-3961 (1994)

M.Takayasu、Y-h.Taguchi 和 H.Takayasu：“随机传输动力学中的非高斯分布”Inter.J.Modern Phys.B。

DOI：
发表时间：
期刊：
影响因子：
0
作者：
通讯作者：

山崎仲道,馮旗,石田孝弘,柳沢和道,王毅,中塚勝人,鶴田孝雄: "流通条件下における岩石/熱水反応系のpH測定" 資源と素材. 111. 903-905 (1996)

Nakamichi Yamazaki、Qi Feng、Takahiro Ishida、Kazumichi Yanagisawa、Yi Wang、Katsuto Nakatsuka、Takao Tsuruta：“分布条件下岩石/热液反应系统的 pH 测量”资源与材料 111. 903-905 (1996)。