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2017年2月26日,中国石油西南油气田公司(以下简称西南油气田)自贡地区第一口页岩气井——自201井经分段压裂改造后,测试获天然气14.0×10~4 m~3/d。自201井位于自贡市荣县双石镇,是西南油气田在四川盆地威远构造南翼针对志留系龙马溪组部署的一口页岩气评价井,该井经直井取得实钻储层相关资料后进行了直井改水平井钻井,完钻井深5 167 m,水平段长1 300 m,经18段大型水力压裂后测试获工业气流。
On February 26, 2017, the first shale gas well in the Zigong area of PetroChina Southwest Oil and Gas Field Company (hereinafter referred to as the Southwest Oil and Gas Field) was subdivided by the fracturing in section 201 and was tested for 14.0 × 10 -4 m -3 of natural gas / d. Since Well No.201 located in Shuanghuizhen, Rongxian County, Zigong City, it is a shale gas evaluation well deployed by the Southwest Oil and Gas Field to the Longmaxi Formation of Silurian in the south wing of Weiyuan Structure in Sichuan Basin. The vertical wells were drilled in horizontal wells with drilling depth of 5 167 m and horizontal sections of 1,300 m. After 18 large-scale hydraulic fracturing tests, industrial gas streams were obtained.