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随着国民经济对天然气需求量的日益增长，人们越来越向深层，超深层要气，现阶段开采致密气藏离不开增产改造技术，因此，要突破深层，超深层气的勘探，首先要在深层，超深层气的水力压裂改造方面取得突破，文章介绍异常高温、高压，超深，致密砂岩气藏压裂改造的特点和难点，并针对其难点进行了技术攻关，最终形成了一套针对该类气藏的优化压裂技术，在中原东濮凹陷探井濮深15井应用后，两次大型压裂均获成功，标志着在超深气勘探工作方面有了新的突破，并为进一步压裂开发超深气藏储备了技术，创造了条件。

Optimal Fracturing Techniques of Ultradeep Tight Sandstone Reservoir

More and more deep and ultradeep gas reservoirs have been drilled in order to meet the national economy's ever-growing demand for natural gas. Well stimulation is often adopted for producing tight gas reservoirs at present stage, therefore a break through must be firstly made in hydraulic fracturing for the deep and ultradeep gas reservoirs for the sake of beraking through the deep and ultradeep gas reservoir exploration. The characters and difficulties of fracturing and reforming the abnormal high temperature, abnormal high pressure,ul-tadeep and tight sandstone reservoir are introduced in the paper. Through studying the key techniques in light of these difficulties, a set of optimal fracturing techniques for such kind of gas reservoir were founded at last. Two times of large-sized fracturing conducted in well Pushen-1 in Dongpu Depression by use of these techniques were all successful. It is indicated that a new breakthrough has been made in ultradeep gas reservoir exploration and some techniques have been prepared and some conditions have been created for ultradeep gas reservoir development by further fracturing.