本文選題：巖石力學(xué) + 石灰?guī)r�。� 參考：《太原理工大學(xué)》2017年碩士論文

【摘要】：滲透率是巖石材料的一種重要運(yùn)輸特性,它直接反映了巖石材料通過流體的能力。巖石滲透特性的研究對油氣藏開采,地下水資源開發(fā)和工程巖體穩(wěn)定性具有重要作用,因此引起了石油地質(zhì)、水文地質(zhì)等地質(zhì)專家的廣泛關(guān)注。對于巖石滲透特性,目前的主要研究手段是室內(nèi)試驗(yàn)。目前,對于巖石在常溫、三軸應(yīng)力狀態(tài)下滲透率的測定技術(shù)已經(jīng)相對成熟,與之相關(guān)的研究也相對深入。國內(nèi)外學(xué)者對溫度作用下巖石滲透特性的變化規(guī)律已經(jīng)進(jìn)行了大量的試驗(yàn)研究,然而,在高溫三軸應(yīng)力狀態(tài)下巖石滲透特性尚處于研究之中,在三軸應(yīng)力狀態(tài)下溫度(高溫階段)與巖石滲透率的關(guān)系仍存在爭議。因此,目前對三軸應(yīng)力狀態(tài)下巖石滲透特性的研究尚不夠深入,僅限于理論分析和根據(jù)統(tǒng)計(jì)規(guī)律獲得的經(jīng)驗(yàn)公式。本文利用太原理工大學(xué)采礦工藝研究所自主研發(fā)的高溫真三軸試驗(yàn)機(jī),采用實(shí)時(shí)加熱的方式模擬石灰?guī)r、砂巖高溫(100℃~400℃)三軸應(yīng)力狀態(tài),采用穩(wěn)態(tài)法對石灰?guī)r和砂巖在不同溫度段的滲透率進(jìn)行了在線測定,并利用熱彈性理論對其進(jìn)行分析,同時(shí)從巖石細(xì)觀結(jié)構(gòu)變化和力學(xué)性質(zhì)變化方面對試驗(yàn)結(jié)果進(jìn)行分析驗(yàn)證。研究表明:在三軸應(yīng)力狀態(tài)下,由于熱膨脹變形和熱破裂的綜合作用,三軸應(yīng)力狀態(tài)下石灰?guī)r和砂巖滲透率隨溫度的變化規(guī)律具有非線性特征:在較低溫度段巖石滲透率隨溫度升高而減小;在中間溫度段,巖石滲透率隨溫度升高而增大;在較高溫度段,巖石滲透率隨溫度升高趨于平緩。該研究結(jié)果對油氣藏開采,地下水資源開發(fā)和工程巖體穩(wěn)定性具有重要理論價(jià)值。
[Abstract]:Permeability is an important transport characteristic of rock material, which directly reflects the ability of rock material to pass through fluid. The study of rock permeability characteristics plays an important role in the exploitation of oil and gas reservoirs, the development of groundwater resources and the stability of engineering rock mass, which has aroused the widespread concern of geological experts such as petroleum geology, hydrogeology and so on. At present, the main research means of rock permeability is laboratory test. At present, the measurement technology of rock permeability at room temperature and triaxial stress state has been relatively mature, and the related research is relatively deep. Scholars at home and abroad have done a lot of experimental research on the variation of rock permeability characteristics under the action of temperature, however, the permeability characteristics of rock under high temperature triaxial stress state are still under study. The relationship between temperature (high temperature stage) and rock permeability under triaxial stress is still controversial. Therefore, the research on the permeability characteristics of rock under triaxial stress is not deep enough, and is limited to the theoretical analysis and empirical formulas obtained according to the statistical law. In this paper, a high temperature true triaxial testing machine developed by Institute of Mining Technology of Taiyuan University of Technology is used to simulate the triaxial stress state of limestone and sandstone at 100 鈩，

本文編號：1978888