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岩溶热储储层的不均匀性强,采灌井之间的连通性不易确定。示踪技术可以将运移参数量化,有效刻画储层流体的特征,研究回灌井和开采井之间的水力联系,包括导水通道,流体流速等信息,对长期回灌可能引起的开采井的冷却进行预测,是岩溶热储井间连通性研究十分有效的技术。本文以华北牛驼镇地热田雄县地区为例,针对蓟县系雾迷山组岩溶热储,采用荧光素钠示踪剂,进行了1口井注入,10口井观测的群井示踪试验。采用裂隙介质溶质运移模型,对示踪试验数据进行了解释,得到优势通道的长度、渗透流速、纵向弥散度、回收率等储层性质,获得了试验区内采灌井之间的连通特征。对调整采灌井布局提出了建议。
Inhomogeneity of karst heat reservoir is strong and the connectivity between well and draw well is not easy to determine. Tracer technology can quantify migration parameters, effectively characterize the reservoir fluid, study the hydraulic connection between the recharge well and the production well, including the information of aqueducts and fluid flow rates, The prediction of cooling is a very effective technique for the study of connectivity between karst thermal reservoirs. Taking Xiongxian geothermal field in Niula town of North China as an example, aiming at the karst heat reservoir of Wumishan Formation in Jixian County, tracer injection of 1 well and well tracer of 10 wells were performed using fluorescein sodium tracer. . Using the transport model of solute transport in fractured media, the experimental data of tracer are interpreted and the reservoir properties such as length, permeate velocity, vertical dispersion and recovery rate of dominant channel are obtained, and the connectivity between the injection and injection wells in the test area is obtained . Proposed to adjust the layout of the injection well.