论文部分内容阅读
在对松辽盆地中央坳陷带压力系统进行系统分析的基础上,结合研究区大量地层水资料,通过对比,研究地层水离子组合特征及其对异常压力条件下成岩作用的响应。研究表明,异常压力环境对地质流体及成岩作用有明显影响。超压和低压均能使地层水矿化度升高,但是影响机制不同。不同压力体系水型不一样,主要发生的成岩作用也不同。超压和常压体系主要为NaHCO3型和NaCl型水,成岩作用以矿物的溶解作用为主。而低压体系主要为CaCl2型水,成岩作用以钙长石的钠长石化为主。
Based on the systematic analysis of the pressure system in the Central Depression of the Songliao Basin, combined with a large amount of formation water data in the study area, the characteristics of ion combination in formation water and its response to diagenesis under abnormal pressure are studied. The research shows that the abnormal pressure environment has obvious influence on the geologic fluid and diagenesis. Both overpressure and underpressure can cause formation water salinity to increase, but the impact mechanism is different. Different water pressure systems are not the same, the main diagenesis is also different. Overpressure and atmospheric pressure system is mainly NaHCO3-type and NaCl-type water, diagenesis dominated by the dissolution of minerals. The low-pressure system is mainly CaCl2-type water, diagenesis to the long feldspar of the long feldspar.