Abstract Water coning in gas production wells generally causes excess water production and many operational problems. This phenomenon is more crucial in fractured reservoirs. The purpose of this study is to investigate this phenomenon by numerical simulation of gas production in a three-dimensional single well model. In order to obtain accurate perception of actual flow behavior, the structure of fracture network consisting of horizontal and vertical fractures defined clearly in the model. The fluid and rock properties of one of the gas fields in south of Iran is used in the model. The performed simulations showed increase of water level around production well due to the high pressure-gradient in the fracture network of reservoir. In addition, evaluation of the impact of various parameters on flow behavior proved that the fracture network plays a significant role in water and gas production in carbonated reservoirs. The results also showed that short-term well closure can not have an important effect on water production problem; but flow rate reduction causes decrease in water production to an acceptable extent. Furthermore, designing suitable depth of completion can also be remarkable in management of water production of gas wells.

中文翻译：

---

裂缝性气藏产水过程及自吸数值模拟——以霍马气田为例

摘要 采气井水锥进通常会导致产水过多和许多操作问题。这种现象在裂缝性储层中更为重要。本研究的目的是通过三维单井模型中的产气数值模拟来研究这种现象。为了准确感知实际流动行为，模型中明确定义了由水平和垂直裂缝组成的裂缝网络结构。模型中使用了伊朗南部气田之一的流体和岩石特性。进行的模拟表明，由于油藏裂缝网络中的高压梯度，生产井周围的水位增加。此外，对各种参数对流动行为影响的评估证明，裂缝网络在碳酸盐岩储层的水和气生产中起着重要作用。结果还表明，短期关井不能对产水问题产生重要影响；但流量降低导致产水量下降到可接受的程度。此外，设计合适的完井深度对气井产水管理也有显着意义。