中国石化川渝天然气基地深层工程铁北1HF井测试获日产31.45万立方米工业气流，井深超过5300米，水平段长1312米，创下我国页岩气井垂直深度新纪录。

普光上二叠统资源大多分布在埋深超过4500米的超深层，地层速度变化剧烈，被视为“禁区”。中国石化突破这一瓶颈，以堪比“深层穿针引线”的钻井精度，实现了水平段优质页岩钻遇率100%，最终成功钻探铁北1HF井。

中国石化自主研发的175兆帕超高压压裂装备，通过现场参数优化、分段施策，在5300米深的高压地层打出了一条“人造气路”，把气藏最深处、最远端的资源全部带回，实现动用最大化。

Sinopec’s Tiebei 1HF well at its Project Deep Earth Sichuan and Chongqing Natural Gas Base has been tested at a high daily output of 314,500 cu m of industrial gas flow with the vertical depth of the well reaching over 5,300 m with a 1,312-m horizontal section, setting a new record for vertical depth of shale gas wells in China.

Most of the resources in the Puguang Upper Permian are distributed in the ultra-deep field with a burial depth of over 4,500 m, which is regarded as a “forbidden zone” because of the rapid changes in the velocity of the strata. Sinopec tackled the bottleneck to realize a 100% drilling encounter rate of high-quality shale in the horizontal section with drilling precision comparable to “threading a needle in the deep underground” to eventually drill the Tiebei 1HF well successfully.

Sinopec’s self-developed 175 MPa ultrahigh-pressure (UHP) fracturing equipment optimizes the parameters on-site with different strategies for each section and opened up a “man-made gas road” in the high-pressure stratum at the depth of 5,300 m, bringing back all the resources from the deepest and farthest ends of the gas reservoir to maximize the development.