利用晶界破裂模式分析岩心及鑽屑以評估地下層性質之研究

Analysis of the Core and Drilling Debris Using Grain Boundary Fracturing Model to Evaluate the Underground Reservoir Properties

魏家美(C.M. Wai) ； 溫紹炳(S.B. Wen)

《鑛冶：中國鑛冶工程學會會刊》 50卷1期 (2006/03) Pp. 110-120

https://doi.org/10.30069/MM.200603_50(1).0010

摘要

本研究在評估地下地層性質上，提出由晶界破裂模式評估地下地層性質的新方法，希望能提供一個選擇，以進一步證實得之不易的地下地層實際狀況。當地層張力強度較低時，在岩石微觀結構呈現結晶顆粒間彼此結合力較低現象，受力破碎時會沿著結合力比較弱的晶粒邊界破裂，造成完整晶粒暴露於顆粒外表，露於外表的完整晶粒很容易因為晶界的結合力不足而鬆脫。本研究透過結晶邊界破裂模式，量化岩石受力後結晶邊界破裂所衍生的結果，進而利用這個量化結果評估地層性質。

關鍵字

地下地層性質 ； 晶界破裂

並列摘要

The purpose of this study was to propose a new method of evaluating underground reservoir properties by grain boundary fracturing model. That was another choice to prove hardly known underground stratum properties. When tensile strength is low, the inter-granular combination in the micro-structure of rock is weak. In fracturing, cracks will proceed along the edge of integranular interface and will cause the whole grain exposed to the surface of fractured particles. The exposed grains would be easily loose because of the lower inter-granular combination force. This study used the grain boundary fracturing model to calculate the degree of grain boundary fracturing after fracturing. This index can be utilized to evaluate the tensile strength of underground rock, which is applicable to the judging of gas input and output operation of a reservoir.

並列關鍵字

Under-ground seam properties ； Grain boundary fracturing