东濮凹陷低渗致密砂岩气藏采气工艺技术研究

Study on Gas Production Press of Low Permeabilitydense Sandstone Gas Reservoir in Dongpu Depression

潘一览¹,毕建霞¹,潘　翔²,敬术生³,许辽辉⁴

Pan Yilan , Bi Jianxia, Pan Xiang, et al

1.中原油田分公司勘探开发科学研究院,2.中原油田分公司物探研究院,3.中原油田分公司采油一厂,4.中原油田分公司天然气处理厂

Scientific Research Institute of Petroleum Exploration and Development , Zhongyuan Oilfield Company, SINOPEC, Henan 457001 , P. R. China

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。

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.