川西洛带构造蓬莱镇气藏水力压裂缝特征分析

ANALYSIS ON CHARACTERISTICS OF HYDRAULIC FRACTURING IN LUODAI PENGLAIZHEN FORMATION

根据洛带构造蓬莱镇气藏的地应力场特征 ,采用不稳定试井、压裂资料对人工水力压裂缝的产状及其长度和宽度等进行了分析 ,结果表明 ,气藏的地应力状态为 σx>σz>σy,形成的水力压裂缝为垂直缝 ,其长度在 30 m～ 2 2 0 m之间 ,宽度在 3mm～ 10 mm左右 ,高度则在 2 0 m左右。

According to the characteristic of ground stress field of Luodai Penglaizhen Formation gas field, this artical analyzes the attitude,length and width of the artificially cracking fracture on the basis of unstable well test. The results show that the state of ground stress is σ x>σ z>σ y and the fractures induced by the artificially fracturing crack is vertical with the length ranging from 30 m to 220 m ,the width from 3 mm to 10 mm and the height about 20 m.