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致密砂岩气藏有效砂体规模小、储集砂体非均质性强,连续性较差,具有单井控制储量低,产量递减快的特点且随着开采时间的延长,低压低产井逐渐增多,单井产量低因而开发难度大。随着水平井钻井、完井、测井技术的不断完善,水平井技术应用越来越广泛,已成为提高特殊油气藏油气井产量和采收率的重要手段之一。本文从致密砂岩气藏的地质特点和开发难点入手,分析了水平井开发致密气藏的有利因素,以典型致密砂岩气藏—苏里格气藏水平井开发取得的较好的开发效果为例,证明了水平井开发致密砂岩气藏具有一定的优势,为此类气藏的开发给予启迪。
Tight sandstone gas reservoirs have small effective sand bodies, strong reservoir sand heterogeneity and poor continuity. They have the characteristics of low single well control and low yield, and gradually increase in low pressure and low production wells as the mining time prolongs , Single-well production and therefore difficult to develop. With the continuous improvement of horizontal well drilling, completion and logging techniques, the application of horizontal well technology has become more and more widespread, and it has become one of the important means to enhance the production and recovery of oil and gas wells in special oil and gas reservoirs. Based on the geological characteristics and development difficulties of tight sandstone gas reservoirs, this paper analyzes the favorable factors of developing tight gas reservoirs in horizontal wells, and takes the good development effect obtained from the development of horizontal well of typical tight sand gas reservoir - Sulige Gas Reservoir as an example It is proved that horizontal well development of tight sandstone gas reservoirs has certain advantages and enlightenment for the development of such gas reservoirs.