多层合采气藏产量劈分数值模拟研究

Study on Numerical Simulation of Production Allocation in Multi-layer Gas Reservoirs

史进 盛蔚 李久娣 夏欣 刘舒

SHI Jin SHENG Wei LI Jiudi XIA Xin LIU Shu

中国石油化工股份有限公司上海海洋油气分公司研究院, 上海 200120; 中国石油化工股份有限公司上海海洋油气分公司油田开发管理部, 上海 200120

Institute of SINOPEC Shanghai Offshore Oil & Gas Company, Shanghai 200120, China; Oilfield Development Management Department of SINOPEC Shanghai Offshore Oil & Gas Company, Shanghai 200120, China

气藏多采用多层合采的方式生产,为了解各层的产出情况,需要对总产量进行劈分,而目前对产量劈分研究较少。此文首先详细分析了目前常用劈分方法存在的不足,在此基础上,建立数值模拟理论模型,通过进行采气速度、地层压力差、边水大小、地层系数KH值比、储量比对劈分系数的敏感性分析,结合产出剖面测试的结果,得到气藏的产量劈分规律,最终创造性地提出数值模拟与产液剖面测试相结合的劈分方法,并提出了不同时机下产液剖面的测量频率,可以提高现场产液剖面测量的效率。最后结合PH气田X1气井的产出剖面测试进行分析,验证了该方法的准确性,证明了其对现场的产量劈分具有重要的指导意义。

Commingle producing way is used in most of gas reservoirs.In order to understand the production situation of each layer,it is necessary to make production allocation.However,at present,study on production allocation is not enough.In this paper,analyses have been conducted on the shortcomings of the common used methods for production allocation.On the basis of the above study,theoretical numerical simulation model is built.In addition,sensitivity analysis has also been done through analyzing the production speed,formation pressure difference,size of edge water body,formation conductivity KH ratio and reservoir volume ratio.Combined with the production logging testing results,production allocation regularity for gas reservoirs has been obtained,and the production allocation method by combining numerical simulation results with production logging testing results has been proposed,which can be used for improving the efficiency of measuring the liquid producing profile in gas field.Through analyzing the results of production logging testing in X1 gas well in Pinghu gas field,the reliability of this method has been verified.It has been confirmed that this method is very significant for guiding actual production allocation in gas field.

https://doi.org/10.3969/j.issn.1008-2336.2015.02.056