鄂尔多斯盆地G区块储层有利区预测

鄂尔多斯盆地G区块位于伊陕斜坡南部，构造平缓，断裂不发育。下奥陶统马家沟组为海相碳酸盐岩沉积环境，前人研究表明马家沟组储层品质是影响其成藏的主要因素，古岩溶斜坡带储层品质较好，为其成藏有利区。为了展现马家沟组顶部构造特征，寻找储层有利区，根据G区二维地震资料，进行地震品质分析、测井特征分析，使用频次直方图法对测井曲线进行一致性校正，在此基础上对各井进行精细标定，并完成该区的地震解释；利用测井速度曲线，构建G区块速度场，绘制马家沟组顶部深度域构造图，并最终给出储层有利区的预测。

The Reservoir Prediction of Favorable Areas in Block G of Ordos Basin

Block G is located in the south of smooth and the fault does not develop well Yishan slope in Erdos Majiagou formation of Basin. The structure is Lower Ordovician is re- garded as marine facies with carbonate rock. The previous study indicated that the Majia- gou reservation quality is affecting its main factors. The quality of the ancient karst slope is good. In order to reveal the characteristics of the top structure in Majiagou formation and locate the favorable reservation section, based on 2--D seismic data of Block G, the seismic quality and logging characteristics are analyzed, and the logging curve is corrected consist- ently. On the basis of this, the seismic data interpretation in this section is completed and the velocity field in Block G is established by the use of logging velocity curve. Finally, the deep structure map of Majiagou formation has been drawn, which makes the predication of the favorable section.