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应用波动过程分析方法,对松辽北部徐家围子徐深3井等14口典型井白垩纪沉积-剥蚀过程进行了系统分析和预测,恢复了地层因不整合所造成的剥蚀厚度,分解出反映盆地内不同凹陷和同一凹陷不同构造部位沉积-剥蚀过程的18Ma、8Ma、4Ma和1Ma4个高频波动周期。定量恢复了与气藏密切相关的晚侏罗世火石岭末期、早白垩世沙河子末期和营城末期不整合剥蚀量平面分布,再现成藏关键时期隆起剥蚀区区域分布规律。预测和定计算了研究区中、新生代构造抬升发生层位和不整合剥蚀量,通过对比分析认为波动过程分析方法具有系统性、预测性和受资料制约小的特点,对于经历了多次构造运动和有火山活动影响的地层不整合剥蚀量恢复最为有效.
Using the method of fluctuating process analysis, the Cretaceous sedimentation-erosion process of 14 typical wells such as Xujiaoxin Well Xujiaweizu 3 in the north of Songliao was systematically analyzed and predicted, and the thickness of denudation caused by unconformity of the strata was recovered and was decomposed to reflect During the depositional-denudation processes in different dimples and different tectonic parts of the same depression in the basin, there are 4 periods of high frequency undulation of 18Ma, 8Ma, 4Ma and 1Ma. Quantitatively, the distribution of unconformity erosion in the Late Jurassic Late Cretaceous, Late Cretaceous Shahezi and Yingcheng, which is closely related to gas reservoir, was recovered quantitatively. Predict and calculate the strata and unconformity erosion of the Meso-Cenozoic tectonic uplift in the study area. Through comparative analysis, it is considered that the method of fluctuating process analysis is systematic, predictive and constrained by a small amount of data. The most effective is the recovery of unconformity denudation caused by movement and volcanic activity.