本文選題：白云巖　切入點：硫酸根　出處：《石油與天然氣地質(zhì)》2017年04期 　論文類型：期刊論文

【摘要】：近年來的油氣勘探實踐表明深層-超深層碳酸鹽巖具有良好的勘探潛力,地層深部碳酸鹽巖儲層溶解-沉淀過程是制約深層-超深層碳酸鹽巖優(yōu)質(zhì)儲層預測的關(guān)鍵科學問題,對于該過程的研究有助于深入了解油氣儲集空間孔隙發(fā)育機理。通過開展溶蝕-沉淀模擬實驗,利用巖相學和地球化學相結(jié)合的分析手段查明常溫常壓到高溫高壓條件下(~200℃~70 MPa)溫度、壓力、水巖比、溶液離子等因素對碳酸鹽巖溶解-沉淀過程的影響程度和作用機制。實驗得到開放系統(tǒng)碳酸鹽巖溶蝕窗溫度范圍為75~150℃,間歇性開放系統(tǒng)碳酸鹽巖溶蝕窗溫度范圍為120~175℃。在開放系統(tǒng),0.3%CO_2溶液中,方解石溶蝕率明顯高于白云石。在半開放系統(tǒng),0.3%CO_2溶液中,云質(zhì)灰?guī)r溶蝕率最高。在開放系統(tǒng),稀硫酸流體中,當溫度超過175℃時白云巖溶蝕量超過灰?guī)r,高溫條件下硫酸根離子和礦物晶體表面陽離子的絡(luò)合過程促進了白云巖的溶解。
[Abstract]:The oil and gas exploration practice in recent years shows that deep to ultra deep carbonate rocks have good exploration potential, and the dissolution and precipitation process of deep carbonate reservoir is the key scientific problem that restricts the prediction of deep to ultra deep carbonate reservoir. The study of this process is helpful to understand the mechanism of pore development in oil and gas reservoir space. By means of the combination of petrography and geochemistry, the temperature, pressure and water-rock ratio are determined under the conditions of room temperature and normal pressure to high temperature and high pressure. The influence degree and mechanism of solution ion on the dissolution and precipitation process of carbonate rock are studied. The experimental results show that the temperature range of dissolution window of carbonate rock in open system is 75 ~ 150 鈩，

本文編號：1603105