岩气参数井小井眼钻井技术——以常页1井为例

Shale Gas Parameter Well Slim Hole Drilling Technology——A Case Study of Changye No.1 Well

在页岩气勘探初期布署实施的参数井,可采用小井眼钻井技术降低钻井成本。论文以湘西北常德地区太阳山背斜页岩气参数井常页1井施工为例,介绍了页岩气小井眼钻井技术的关键组成部分,包括:钻井设备的选型与配置、钻具结构组合、钻井工艺参数的选择和优化、泥浆体系的选择和性能维护、绳索取心技术、含气量现场解吸测试、常见事故的预防和处理、完井工艺等。小井眼钻井技术的成功应用表明,小井眼钻井技术不仅能较好满足页岩气勘探初期的钻井目的,而且能缩短钻井周期,降低钻井成本,取得较大的经济效益。

Parameter well allocation and execution during initial stage of shale gas exploration can use slim hole drilling technology to reduce coast. Taking the drilling of parameter well Changye No. 1 well in Taiyangshan anticline, Changde area, northwestern Hunan as an example, introduced the key components of shale gas slim hole drilling technology, including drilling equipment selection and allo- cation, drilling tool structure, drilling parameters selection and optimization, mud system selection and performance maintenance, wire- line coring technology, gas content and site desorption test, common accidents prevention and processing, well completion technology etc. The successful application of slim hole drilling technology has shown： it not only can satisfy shale gas exploration initial stage drill- ing purpose, also shorten drilling period, lower down drilling cost and acquire good economic benefit.