华北南部地区石炭—二叠系勘探前景分析

Exploration prospects of the Carboniferous and Permian in the southern North China

徐向华 陈新军 雷鸣 李淑筠 周小进 武明辉

Xu Xianghua Chen Xinjun Lei Ming Li Shujun Zhou Xiaojin Wu Minghui

中国石油化工股份有限公司, 石油勘探开发研究院, 北京, 100083

Research Institute of Exploration and Production, SINOPEC, Beijing 100083, China

华北南部地区虽然经历了复杂构造—沉积演化,但通过对区内石炭—二叠含煤层系埋藏结构和生烃演化类型的分析认为,该区石炭—二叠系具备较好的烃源物质基础。其中,中构造层(三叠系、侏罗—白垩系)的原始沉积厚度相对较小、新生代沉积厚度较大的3层埋藏结构和晚期生烃型的部分凹陷,具备喜山期"二次生烃"形成煤成气的潜力,有较好的勘探前景。结合该区石炭—二叠含煤层系煤成气成藏特点提出了评价原则,优选了有利的勘探靶区并提出了勘探部署建议。

Based on the study of the covered structures and analysis of the hydrocarbon evolution types in coal-bearing strata of southern North China, it was showed that there was good hydrocarbon source in the Carboniferous-Permian sequence. The thickness of original middle layer in coal-bearing strata, the Triassic and Jurassic-Cretaceous, was relatively thin. Some Neogene sags showed favorable potential such as three covered structures and late hydrocarbon generation. The coal-forming gas accumulation could be formed in the secondary hydrocarbon generation of Himalayan stage, so it was showed the good exploration prospects in southern North China. Based on the coal-forming gas accumulation features, the evaluation principle was proposed and some gainful exploration targets were evaluated.

中国石化先导项目(G5800-09-ZS-YTB025)

https://doi.org/10.11781/sysydz201102148