水力破裂法現地應力量測及破壞準則探討

In-Situ Stress Measurement Using Hydraulic Fracturing and the Use of Failure Criteria

楊明宗(Ming-Tzung Yang) ； 歐陽湘(Shoung Ouyang) ； 柳志錫(Chih-His Liu) ； 吳建宏(Jian-Hong Wu)

《地工技術》 99期 (2004/03) Pp. 5-14

https://doi.org/10.30140/SG.200403.0001

摘要

水力破裂法為一廣為人知的現地應力量測方法，不過在國內仍然少有現地施測的相關經驗與資料，本文藉由在國內進行的一項現地試驗來說明水力破裂法的施測流程與分析方法，而本次試驗結果於238m至430m區間內，其最大水平應力為8.41～14.43MPa，最小水平應力為4.54～9.38MPa，整體而言主應力在西北－東南方向。此外，本文嘗試引進Hoek-Brown破壞準則，探討現地應力的修正方法，以能解析水力破裂法於產生水平裂縫時之現地應力大小。

關鍵字

水力破裂法 ； 現地應力 ； Hoek-Brown破壞準則

並列摘要

Hydraulic fracturing is a well-known method to measure the in-situ stress, but the local testing experiences and data are limited in Taiwan. In this paper, an accomplished domestic in-situ test is taken as an example to illustrate the testing process and the analysis method. The testing results show that the local maximum and minimum horizontal stress are 8.41~14.43 MPa and 4.54~9.38 MPa at depths from 238m to 430m, respectively. And the principle stress direction is NW-SE. In addition, the Hoek-Brown failure criteria is adopted to estimate the in-situ stresses when the fracturing cracks would occur horizontally during a test.

並列關鍵字

hydraulic fracturing ； in-situ stress ； hoek-brown failure criteria