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气体钻井地层出水的定量计算

发表时间:2009-06-30  浏览量:1711  下载量:803
全部作者: 闫铁,刘顺利,毕雪亮
作者单位: 大庆石油学院提高油气采收率教育部重点实验室
摘 要: 气体欠平衡钻井过程中,地层出水问题成为限制该技术应用的瓶颈之一,准确预测出水层和计算出水量对欠平衡钻井的顺利实施有着非常重要的作用。目前,有关地层出水量的计算方法以定性研究居多,一些定量计算方法由于考虑因素过于简单,计算误差较大。在前人的研究基础上综合考虑储层的特点,将储层逐渐打开的过程与达西渗流和非达西渗流结合起来,建立气体钻井中地层出水的定量计算模型。在此基础上,通过参数分析和地层流体渗流特性,建立了地层流体进入地层渗流方式的判别模式,从而得出了达西与非达西渗流的临界判别曲线,为进一步研究和解决气体钻井中的地层出水问题提供理论与方法。该模型的突出特点是根据渗流特性分别应用不同的模型计算地层出水量,克服了以前只能用单一模型计算出水量的缺陷。
关 键 词: 钻井工程;气体钻井;欠平衡钻井;地层出水;达西渗流;非达西渗流
Title: Quantitative calculation of formation water discharge in gas drilling
Author: YAN Tie, LIU Shunli, BI Xueliang
Organization: Key Laboratory of Enhanced Oil & Gas Recovery, Ministry of Education, Daqing Petroleum Institute
Abstract: In the process of gas under-balance drilling, the problem of formation water discharge is one of the bottlenecks of this technique application. It is very important that the amount of formation water discharge is accurately calculated and the positions of formation water discharge are predicted for the implementation of under-balanced drilling. At present most of the computational methods about formation water discharge are qualitative, and some of them are so simple that they could cause probable errors. In this paper, the quantitative models of formation water discharge are established on the basis of the predecessor’s research. In these models, not only the reservoir characteristics are considered, but also the reservoir opening process is combined with the reservoir Darcy flow and non-Darcy flow. Based on this, the discrimination mode of the formation water seepage way is developed by means of parametric analysis and the filtrational characteristic of resident fluid. The critical discriminating curve is obtained for Darcy flow and non-Darcy flow and it provides the theoretical basis for the further research of solving the problem of formation water discharge. The outstanding feature of this model is to calculate the water yield with the different models according to the different filtrational characteristics. It also overcomes the defect of calculating the water yield in the single model before.
Key words: drilling engineering; gas drilling; under-balanced drilling; formation water discharge; Darcy flow; non-Darcy flow
发表期数: 2009年6月第12期
引用格式: 闫铁,刘顺利,毕雪亮. 气体钻井地层出水的定量计算[J]. 中国科技论文在线精品论文,2009,2(12):1247-1251.
 
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