摘要
地面微地震监测资料相邻道走时曲线时差很小,用于模型校正后的反演不够敏感,影响反演定位精度。为此,探索了针对地面监测微地震事件,利用射孔点微地震记录建立等效初始速度模型,通过扰动速度模型找到最佳微地震事件的等效速度,进而对该微地震事件进行定位的方法。通过理论模型验证了该方法的有效性;对实际射孔资料进行等效速度反演,定位结果与实际射孔位置一致,进一步验证了方法的可靠性;实际微地震资料反演定位结果与预期结果一致,证明地面监测微地震事件的等效速度反演定位方法切实可行。
For surface microseismic monitoring data,the moveout of traveltime curve between adjacent gathers is very small,which is not so sensitive to the inversion after model correction and affects the accuracy of inversion positioning.Therefore,aiming at the surface microseismic monitoring event,the perforating point microseismic record is used to establish equivalent initial velocity model,then the equivalent velocity of best microseismic event was identified by disturbance velocity model,and eventually the position of the microseismic event is verified.The effectiveness and reliability of the method was verified by theoretical model and actual perforating data.Moreover,equivalent velocity inversion positioning of actual surface microseismic monitoring data proved the feasibility of the method.
出处
《石油物探》
EI
CSCD
北大核心
2012年第6期606-612,632,共8页
Geophysical Prospecting For Petroleum
关键词
地面微地震
等效速度
模拟退火算法
反演定位
surface microseismic monitoring
equivalent velocity
simulated annealing algorithm
inversion positioning