陇东地区上古生界储层岩屑成分种类复杂且多变,分选性很差,从成分到结构差异性都很大;储层孔隙结构变化大,孔渗关系复杂;复杂孔隙结构导致储层电性受孔隙结构影响大,对流体性质响应弱,流体性质判识难。元素测井是目前定量评价岩石矿物...陇东地区上古生界储层岩屑成分种类复杂且多变,分选性很差,从成分到结构差异性都很大;储层孔隙结构变化大,孔渗关系复杂;复杂孔隙结构导致储层电性受孔隙结构影响大,对流体性质响应弱,流体性质判识难。元素测井是目前定量评价岩石矿物组分精度最高的测井方法,但受成本所限,不能普遍应用,因此利用常规测井曲线定量评价复杂砂岩矿物组分是一种有效的尝试。经实践证明,应用能谱岩石矿物组分定量评价技术,可精细评价岩性,识别低阻气层,其中,陇东地区上古生界解释符合率提高至80%,助力盒8段、山1段发现多个有利含气砂带,新增含气面积4444.1 m 2,预测地质储量2524×108 m 3,取得了良好效果。展开更多
To achieve efficient flotation separation of brucite and calcite,flotation separation experiments were conducted on two minerals using dodecylamine(DDA)as the collector and potassium dihydrogen phosphate(PDP)as the re...To achieve efficient flotation separation of brucite and calcite,flotation separation experiments were conducted on two minerals using dodecylamine(DDA)as the collector and potassium dihydrogen phosphate(PDP)as the regulator.The action mechanism of DDA and PDP was explored through contact angle measurement,zeta potential detection,solution chemistry calculation,FTIR analysis,and XPS detection.The flotation results showed that when DDA dosage was 35 mg/L and PDP dosage was 40 mg/L,the maximum floating difference between brucite and calcite was 79.81%,and the selectivity separation index was 6.46.The detection analysis showed that the main dissolved component HPO_(4)^(2−)of PDP is selectively strongly adsorbed on the Ca site on the surface of calcite,promoting the adsorption of the main dissolved component RNH_(3)^(+)of DDA on calcite surface,while brucite is basically not affected by PDP.Therefore,PDP is an effective regulator for the reverse flotation separation of brucite and calcite in DDA system.展开更多
文摘陇东地区上古生界储层岩屑成分种类复杂且多变,分选性很差,从成分到结构差异性都很大;储层孔隙结构变化大,孔渗关系复杂;复杂孔隙结构导致储层电性受孔隙结构影响大,对流体性质响应弱,流体性质判识难。元素测井是目前定量评价岩石矿物组分精度最高的测井方法,但受成本所限,不能普遍应用,因此利用常规测井曲线定量评价复杂砂岩矿物组分是一种有效的尝试。经实践证明,应用能谱岩石矿物组分定量评价技术,可精细评价岩性,识别低阻气层,其中,陇东地区上古生界解释符合率提高至80%,助力盒8段、山1段发现多个有利含气砂带,新增含气面积4444.1 m 2,预测地质储量2524×108 m 3,取得了良好效果。
基金the General Program of the National Natural Science Foundation of China(Nos.51974064,52174239)the National Key R&D Program of China(No.2021YFC2902400)the Outstanding Postdoctoral Program of Jiangsu Province,China(No.2022ZB521).
文摘To achieve efficient flotation separation of brucite and calcite,flotation separation experiments were conducted on two minerals using dodecylamine(DDA)as the collector and potassium dihydrogen phosphate(PDP)as the regulator.The action mechanism of DDA and PDP was explored through contact angle measurement,zeta potential detection,solution chemistry calculation,FTIR analysis,and XPS detection.The flotation results showed that when DDA dosage was 35 mg/L and PDP dosage was 40 mg/L,the maximum floating difference between brucite and calcite was 79.81%,and the selectivity separation index was 6.46.The detection analysis showed that the main dissolved component HPO_(4)^(2−)of PDP is selectively strongly adsorbed on the Ca site on the surface of calcite,promoting the adsorption of the main dissolved component RNH_(3)^(+)of DDA on calcite surface,while brucite is basically not affected by PDP.Therefore,PDP is an effective regulator for the reverse flotation separation of brucite and calcite in DDA system.
