柴达木盆地阿尔金山前带油气勘探方向研究--来自洛杉矶盆地油气勘探实践的启发

柴达木盆地与洛杉矶盆地在构造特征和演化主控因素等方面具有很大的相似性,其中阿尔金断裂带和圣莫尼卡断裂带构造活动特征非常相似,两者山前地区的构造背景也具有可比性.洛杉矶盆地的勘探实践说明断层下盘圈闭有时也能含有很可观的储量.通过对比分析两者之间的相似性,认为柴达木盆地阿尔金山前带构造深部发育的逆冲断裂下盘也应该具有形成油气圈闭的条件.评价和预测此类圈闭的最关键因素是进行走向闭合分析和断层封闭性的评价.

Study on the hydrocarbon exploration potential in the front of Altun mountain, Qaidam basin: An inspiration from the hydrocarbon exploration in the Los Angeles basin

There is much comparability between the tectonic settings and their controlling factors of the Qaidam basin and the Los Angeles basin, especially the Altun Fault and the Santa Monica Fault Trend. The exploration experience of the Los Angeles basin demonstrates that the footwall fault traps can have very significant reserves. Based on the contrast of the comparability, the paper concludes that the footwalls of reverse faults in the front of Altun mountain may form effective hydrocarbon traps. The most critical factors in evaluating and predicting such traps sealed by the reverse fault are the analysis of strike closure and the estimation of fault sealing.