The adsorption of tungsten on ferric oxide, manganese dioxide, slate, carbonaceous slate,kaolinite and bentonite in the solutions of pH 4---9 at atmospheric temperatures and pressures has been examined. Experimental r...The adsorption of tungsten on ferric oxide, manganese dioxide, slate, carbonaceous slate,kaolinite and bentonite in the solutions of pH 4---9 at atmospheric temperatures and pressures has been examined. Experimental results show that acidic solution is in favour of the adsorption of tungsten on the adsorbents. The adsorptivities of these adsorbents for tungsten decrease with increasing pH values for the solutions. Of all the substances joining the expe-riment, Fe2O3 is possessed of the highest adsorptivity and clays of the lowest. Their adsorptivities reduce in the order of Fe2O3, MnO, carbonaceous slate, SiO2, slate and clay in neutral and acidic solutions and of Fe2O3, carbonaceous slate, MnO, slate, clay and SiO2 in alkaline solutions. The adsorption of tungsten on the adsorbents and its pH dependence can be explained by the presence of W(VI) complex cations. The increase of pH results in the reduction of their quantities in the solutions with concomitant diminution of adsorptivity.Experimental data indicate that W shows a strong tendency of concentration during supergene processes in tungsten geochemical provinces. Therefore, it is of particular significance in the formation of tungsten-bearing formations.展开更多
基于最新取心井资料,通过碳酸盐岩岩石学特征、包裹体岩相学特征及流体包裹体均一温度分析,确定了川中合川—潼南地区茅三段岩溶储层特征及油气成藏过程,明确了储层发育的控制因素,并初步预测了勘探有利区。研究结果表明:(1)合川—潼南...基于最新取心井资料,通过碳酸盐岩岩石学特征、包裹体岩相学特征及流体包裹体均一温度分析,确定了川中合川—潼南地区茅三段岩溶储层特征及油气成藏过程,明确了储层发育的控制因素,并初步预测了勘探有利区。研究结果表明:(1)合川—潼南地区茅三段储层岩性以亮晶—泥微晶生屑灰岩为主,储集空间为构造扩溶缝洞及溶蚀孔洞,为以裂缝为主的特低孔、特低渗缝洞型岩溶储层,平均孔隙度为2.04%,平均渗透率为0.210 m D。(2)研究区茅三段发育3期矿物充填,从早至晚依次为粒间胶结粉—细晶方解石,缝洞充填细—中晶方解石,缝洞充填中—粗晶方解石;3期矿物充填中发育的流体包裹体均一温度分别为90~106℃,111~136℃及173~193℃;存在晚三叠世古油藏形成期、早侏罗世古油气藏形成期与中—晚侏罗世裂解古气藏形成期3期油气充注成藏。(3)茅三段岩溶储层发育受表生岩溶作用和构造断裂活动的共同控制,储层发育的岩溶及构造叠合有利区为2139 km^(2),主要分布于研究区中部。展开更多
文摘The adsorption of tungsten on ferric oxide, manganese dioxide, slate, carbonaceous slate,kaolinite and bentonite in the solutions of pH 4---9 at atmospheric temperatures and pressures has been examined. Experimental results show that acidic solution is in favour of the adsorption of tungsten on the adsorbents. The adsorptivities of these adsorbents for tungsten decrease with increasing pH values for the solutions. Of all the substances joining the expe-riment, Fe2O3 is possessed of the highest adsorptivity and clays of the lowest. Their adsorptivities reduce in the order of Fe2O3, MnO, carbonaceous slate, SiO2, slate and clay in neutral and acidic solutions and of Fe2O3, carbonaceous slate, MnO, slate, clay and SiO2 in alkaline solutions. The adsorption of tungsten on the adsorbents and its pH dependence can be explained by the presence of W(VI) complex cations. The increase of pH results in the reduction of their quantities in the solutions with concomitant diminution of adsorptivity.Experimental data indicate that W shows a strong tendency of concentration during supergene processes in tungsten geochemical provinces. Therefore, it is of particular significance in the formation of tungsten-bearing formations.
文摘基于最新取心井资料,通过碳酸盐岩岩石学特征、包裹体岩相学特征及流体包裹体均一温度分析,确定了川中合川—潼南地区茅三段岩溶储层特征及油气成藏过程,明确了储层发育的控制因素,并初步预测了勘探有利区。研究结果表明:(1)合川—潼南地区茅三段储层岩性以亮晶—泥微晶生屑灰岩为主,储集空间为构造扩溶缝洞及溶蚀孔洞,为以裂缝为主的特低孔、特低渗缝洞型岩溶储层,平均孔隙度为2.04%,平均渗透率为0.210 m D。(2)研究区茅三段发育3期矿物充填,从早至晚依次为粒间胶结粉—细晶方解石,缝洞充填细—中晶方解石,缝洞充填中—粗晶方解石;3期矿物充填中发育的流体包裹体均一温度分别为90~106℃,111~136℃及173~193℃;存在晚三叠世古油藏形成期、早侏罗世古油气藏形成期与中—晚侏罗世裂解古气藏形成期3期油气充注成藏。(3)茅三段岩溶储层发育受表生岩溶作用和构造断裂活动的共同控制,储层发育的岩溶及构造叠合有利区为2139 km^(2),主要分布于研究区中部。
