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W油田提交和动用的储量多为低渗-特低渗透扶杨油层,油层特殊的地质沉积环境,加上多数井处于低洼区块,钻井时就会出现一定数量的低效井。利用油藏工程和数理统计方法确定低效井标准,给出不同区块的厚度下限,结合三维地震储层预测结果,优选出厚度大的区域。同时理论结合实践,确定出钻井综合运行方法。从而指导钻机运行,提高砂体钻遇有效厚度,减少低效井比例,提高钻井成功率并在实际应用中见到初步效果。
Most of the reserves submitted and used by W Oilfield are mostly low permeability - ultra-low permeability Fuyang oil layer and special geological depositional environment of the oil layer. With most of the wells in the low-lying areas, a certain amount of inefficient wells will appear when drilling. The standard of inefficient wells is determined by reservoir engineering and mathematical statistics. The lower limit of the thickness of different blocks is given. Based on the prediction results of 3D seismic reservoirs, the area with large thickness is selected. At the same time theory combined with practice to determine the drilling operation method. This will guide the operation of drilling rigs, increase the effective thickness of sandbodies encountered, reduce the proportion of inefficient wells, improve the success rate of drilling and see preliminary results in practical application.