梁董庙构造须家河组砂岩储层地震预测研究

蜀南梁董庙构造须家河组为一套砂泥岩互层的陆相碎屑岩沉积,据钻测井资料分析得知,砂岩储层含气后的速度与页岩速度相差不大,因而只用速度反演资料不能有效解决该类型储层预测及烃类识别问题.从测井曲线分析可知,该套砂岩储层还表现出低自然伽玛、相对高孔隙度的测井响应特征.根据自然伽玛进行岩性解释,利用孔隙度数据识别相对孔隙度较高的有利砂岩储层段,最后由低速异常对砂岩含气性进行预测.通过开展蜀南梁董庙须家河组砂岩储层的预测研究,取得了较好的地质成果,对该地区的勘探开发具有重要的指导意义.

Research of Seisimic Prediction of Sandstone Reservoir of T3X in Liangdongmiao

The T3 X of Liangdongmiao is a set of land face clastic sediment in which shale interlace with sandstone. By the analyzing of logging, we known the difference between the velocity of the sandstone reservoir which contain gas and the velocity of shale is not clearly. It is hard to solve the problem that about reservoir prediction and identify hydrocarbon by means of velocity inversion. By the analyzing of logs, we known that sandstone reservoir has the character of low GR and relatively higher porosity. We can use GR to interpret the lithology, and porosity data to identify possible reservoir which have relatively higher porosity. In the end, the abnormity of low velocity is used to predict the gas in sandstone. Through the research of reservoir prediction for T3X of Liangdongmiao, a good geological result is received, and this has a guidable meaning on the exploration in the area.