摘要
目前YB地区总体钻井事故频发、钻井效率较低,钻井周期较长。该区块部署的开发、评价井比较多,钻井任务重。而欠平衡钻井技术是降低钻井成本,提高钻井效率和缩短钻井周期的重要手段。这就要求掌握YB地区陆相气层的分布规律,明确含气井段及含气有利区域。综合考虑储层的孔隙度、渗透率、含气饱和度及全烃曲线等参数的影响,对储层有利区域进行预测。此方法简单易行,由于岩石储层的孔隙度、渗透率及含气饱和度数值高低能反映储层产气潜力大小,而全烃含量的变化能反映储层中天然气的运移能力和含气性大小,且利用全烃曲线面积计算综合因子正好能屏蔽钻井液和全烃背景值的影响。因此,通过求取综合因子的方法,对该地区储层有利区域分布进行预测是有效的。通过应用验证了这种方法的合理性。
At present ,the drilling accidents happen frequently ,the drilling efficiency is low and the drilling cycle is very long in YB area.A lot of development wells and appraisal wells will be drilled in the future and the drilling task is heavy in this block.The underbalanced drilling technology is an important tool for reducing costs ,enhancing efficiency and nental gas producing formations,gas- shortening period of the drilling.Therefore ,the distribution rule of contibearing intervals and favorable gas-bearing districts in YB area should be known.In this paper,the favorable districts of reservoirs are predicted after comprehensive consideration on the parameters of the reservoir porosity ,permeability ,gas saturation and total hydrocarbon curve.This method is simple and easy.The reservoir porosity ,permeability and gas saturation can reflect the potential of gas production and the changes of total hydrocarbon content can reflect the migration ability and the gas bearing character of natural gas in the reservoir.Multi-factor calculated by the total hydrocarbon curve area may mask the impact of the drilling fluid and hydrocarbon background value.This method for predicting favorable districts is effective and the application of it proves its rationality.
出处
《中外能源》
CAS
2013年第5期48-50,共3页
Sino-Global Energy
关键词
录井
全烃含量
综合因子
储层预测
well logging
total hydrocarbon content
muhi-factor
reservoir prediction
