东濮凹陷低渗致密砂岩气藏采气工艺技术研究

低渗致密砂岩藏是在特殊的地质条件下形成的，具有孔隙度低、渗透率低渗致密、孔隙结构复杂、毛细管压力特别高、含水饱和度高、砂体呈透镜状、气水分布复杂、高异常地层压力等复杂的地质特征，开发难度大，效益差，工艺技术要求高。东濮凹陷户部寨气田为典型的低渗致密砂岩气田，通过研究气层保护技术、气层压裂改造技术、气井排液采气技术，经过多年的开发实践，形成了配套的采气工艺技术，有效地指导了气藏开发。

Study on Gas Production Press of Low Permeability-dense Sandstone Gas Reservoir in Dongpu Depression

Low permeability and competent sand gas reservoir is formed on special geologic conditions, which has the character of complex geologic features such as lowporosity and low permeability, tight, complex pore structure, abnormal high capillary pressure, high water saturation, lenticular sand, long gas bearing well bore,complex distribution of gas and water, abnormal high formation pressure, etc. The characters which cause high difficulties, low economic benefits, and high needs to gas developing technique in production. Hubuzhai Gasfield in Dongpu depression is a classical low permeability and competent sand gas reservoir. We have studied the technique of gas reservoir protection, fracturing and reforming, water draining in gas producing. Based on the developing experiences of long years, there have formed the matching technique in gas development and it guides the production of the gas field efficiently.