摘要
本文从层间干扰机制出发,分析了倒灌现象、物性差异以及开发方式对层间压力干扰的影响,并运用数值模拟手段进行合采生产特征和控制因素分析,研究表明:合采时出现短时的水倒灌现象,对开发效果影响不大,但倒灌后形成的水锁效应强弱是影响合采的关键;渗透率等物性差异不影响合采效率,但渗透率、解吸压力、工作制度等是影响两气合采经济性的重要参数。
Base on the interference mechanism analysis, the effect of reservoir properties difference and flow backward on pressure interference is studied. The co-production characteristic and its key impact factors are investigated by numerical simulation. It is stated that the flow backward will occur especially in early stage but last only a short time, which has little effect on the whole production history. However, the water from coal seam flows into the tight formation, which may lead the water blocking happen and decrease the productivity. The properties difference such as the permeability has no effect on the coproduction but do play a key role in productivity and economy, similar parameter like desorption pressure and work system.
作者
徐兵祥
白玉湖
陈岭
陈桂华
李彦尊
XU Bingxiang;BAI Yuhu;CHEN Ling;CHEN Guihua;LI Yanzun(CNOOC Research Institute Co. , Ltd. , Beijing 100028)
出处
《中国煤层气》
2019年第1期3-7,共5页
China Coalbed Methane
基金
中海油研究总院有限责任公司项目"煤层气-致密气联合开发层间干扰规律研究"(项目编号2017-JCJS-01)
关键词
煤层气-致密气
合采
层间干扰
倒灌
Coalbed methane and tight gas
co-production
interlayer interference
flow backward
