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以东营凹陷的梁家楼油田和胜坨油田为例,探讨了油田水化学研究在油源对比和油气运移研究中的作用。研究结果表明:这2个油田的水化学分区和油源分区较为一致,油田水以较低矿化度NaHCO_3型为主的区块,其原油主要源自沙三段下亚段烃源岩;而油田水以较高矿化度CaCl_2型为主的区块,其原油主要源于沙四段上亚段烃源岩。根据构造和断裂发育特征分析认为,油田水带有明确的油源信息,可作为油源分析和油气运移研究的辅助证据。
Taking Liangjialou oilfield and Shengtuo oilfield in Dongying depression as an example, the effects of hydrochemistry research on oil source correlation and hydrocarbon migration are discussed. The results show that the hydrochemical zoning and oil source zonation are consistent in these two fields. The oilfield water is dominated by the lower salinity NaHCO_3 type. The crude oil is mainly derived from the source rocks of the lower third member of Shahejie Formation. However, the oilfield water is dominated by the higher salinity CaCl 2 type. The crude oil is mainly derived from the source rocks of Upper Shahejie Formation. Based on the tectonic and fault developmental characteristics, it is considered that there is definite oil source information in oilfield waterbeds, which can be used as auxiliary evidence for oil source analysis and hydrocarbon migration research.