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塔里木盆地油田水总矿化度60g/L-320g/L,与氯离子浓度呈正相关,总体上受铝硅酸盐矿物成岩改造影响甚小。油田水主要为部分贫镁型和完全耗镁型两种。部分贫镁水型(镁的摩尔数多占Na+Ca+Mg的1%-2%,钙可高达15%-22%)被认为来自方解石的白云石化作用和斜长石的溶解作用;氧同位素值、Li、B和Al浓度随埋深而增大,高的锶浓度指示了水-铝硅酸盐矿物反应是受温度控制的,Mg-Li可指示古地温。氢氧同位素演化可为同步增大,还可为氧同位素明显变重而氢同位素正偏移小。中新生界溴浓度较低、古生界较高,溴浓度受海陆相沉积环境和蒸发浓缩作用的控制。
The total salinity of oil in the Tarim Basin is 60g / L-320g / L, which is positively correlated with the chloride ion concentration. Generally speaking, it has little effect on diagenetic alteration of aluminosilicate minerals. Oilfield water is mainly part of the lean magnesium type and completely consume two types of magnesium. Part of the lean magnesium type (more than 1% -2% of the molar amount of magnesium and 15% -22% of calcium) of magnesium is considered to be derived from dolomitization of calcite and dissolution of plagioclase; oxygen isotope values, Li The concentrations of B and Al increase with depth. The high concentration of strontium indicates that the water-aluminosilicate mineral reaction is controlled by temperature, and Mg-Li can indicate the paleotemperature. Hydrogen and oxygen isotope evolution can be synchronized increases, but also significantly heavier oxygen isotopes and hydrogen isotopes positive shift small. In the Mesozoic and Cenozoic, the concentration of bromine is lower, the Paleozoic is higher and the bromine concentration is controlled by the sedimentary environment in the marine and continental facies and the evaporation and concentration.