含油气检测技术及其在岩性圈闭油气藏勘探中的应用

以钻井油气层地震-地质综合分析为起点，以保幅纯波地震资料信息分解为基础，针对目标体，采用在小时窗范围内提取油气层地震动力学参数的方法开展含油气检测研究，根据地震多属性的综合变化共同确定含油气层系的空间分布范围，结合流体势分析为勘探阶段处于斜坡部位等的岩性圈闭综合评价提供辅助评价依据。通过在江汉盆地潜江凹陷、吐哈盆地台北凹陷等多个地区的实际应用，有效圈定了已知含油气层系分布范围并预测了有利含油气区块。在潜江凹陷预测的严河有利含油气区块钻探的严5井,台北凹陷红台-疙瘩台地区预测的有利含气区块钻探的红台13井、疙11井和疙13井,胜北地区预测的有利含油气区块钻探的胜北16井等均不同程度获得商业性油气流，取得了良好的勘探效果，初步证实了该方法在地震资料品质较好、分辨率较高、构造相对简单的较高勘探程度地区具有良好的适用性。应用表明，数据体的选择、含油气层位的精细标定、含油气检测试验（地震敏感属性优选、有效频段的选择）、时窗大小的确定、目标体顶底约束层位的解释等是利用保幅纯波地震资料直接开展含油气检测技术应用的关键。

Hydrocarbon Detection and Application in Lithologic Reservoir Exploration

Based on seismic-geology integration of oil and gas layer in drilled hole and amplitude-maintained and pure-wave seismic data, we selected the seismic dynamic parameters within small window to detect oil and gas in target body, and used the integrated variation of multi-attributes of seismic to determine the space range of oil-gas layers. Combining with fluid potential and all of these behaviors above, the auxiliary reference for integrated evaluation of lithologic traps in slope was pointed out in exploration stage of oil and gas. We applied this method to determined the distribution of oil and gas layers and predict the potential layers in Qianjiang sag of Jianghan basin and Taibei sag of Tuha basin. That the commercial oil and gas product in the drilled Yan-5 well in the predicted favorable Yanhe block in Qianjiang sag, wells of Hongtai-13, Ge-11 and Ge13 in the Hongtai-Gedatai block and well Shengbei-16 in Shengbei area of Tuha basin gotten has proved that this method is available for the high exploration degree area with high quality seismic data, high resolution, and simple structure. The applied result indicated that selection of seismic data, fine calibration of oil-gas layers, test of oil and gas detection (i.e. optimization of sensitive seismic attributes, selection of effective frequency spectrum), determination of the window magnitude, and interpretation of top and bottom constrained layers in target body are critical for using hydrocarbon detection using amplitude-maintained and pure-wave seismic data to do oil and gas detection.