分层采气工艺技术在涩北气田的应用

涩北气田是青海油田的主力天然气田，属于第四系自生自储的生物成因原生天然气藏，天然气组分中甲烷含量在98%以上，不含硫，微含氮气，储层成岩性差、欠压实、胶结疏松，易出砂，这些条件限制了气井产量的提高。针对这种情况，经过多年的研究与探索，逐渐形成了以分层采气为基础的一系列适合涩北气田的采气工艺技术，提高了气井的单井产量，促进了涩北气田开发水平的提高。

APPLICATION OF SEPARATE LAYER GAS RECOVERY TECHNOLOGY IN THE SEBEI GAS FIELD

The Sebei gas field as a major gas field of PetroChina Qinghai Oilfield Company is a Quaternary biogenetic gas reservoir with self sourcing and self reservoiring hydrocarbon origins. Even though the natural gas in this field contains methane more than 98%, a little bit nitrogen but no sulfur, the yield of gas has been restricted by bad diagenetic rocks, sanding formation, and poorly interconnected or undercompacted rocks. After many years of study and investigation, engineers and technical staff in this company have completed a series of gas recovery technology adapt for the Sebei gas field based on separation layer gas recovery, which helped enhance the production capacity of a single well, and promote the exploitation to a certain level in this field.