天然气工业2025，Vol.45Issue(4)：193-202,10.DOI:10.3787/j.issn.1000-0976.2025.04.016
海域天然气水合物开采对疏松砂岩气藏开发技术的借鉴与创新
Innovation of marine natural gas hydrate exploitation based on unconsolidated sandstone gas reservoir development technologies
摘要
Abstract
The natural gas hydrate(hereinafter referred to as hydrate)reservoirs in sea areas are mostly weak diagenetic argillaceous siltstone reservoirs,and their geological and exploitation characteristics are similar to those of unconsolidated sandstone gas reservoirs,which means their exploitation technologies are strongly related.Therefore,the mature development technologies for unconsolidated sandstone gas reservoirs are of important guidance significance to the commercial exploitation of hydrate in sea areas.In this paper,the geological conditions and production test characteristics of hydrate reservoirs are analyzed,and the technical bottlenecks restricting the exploitation of such reservoirs are clarified.Then,ideas and plans to solve the geology engineering problems in hydrate exploitation are proposed innovatively by referring to the key technologies formed by PetroChina Qinghai Oilfield Company in the nearly 30 years of unconsolidated sandstone gas reservoir development.The following results are obtained.First,the technical breakthrough of hydrate exploitation mode lies in"well pattern arrangement control,upper stabilization and lower exploitation,reservoir soaking with geotherm,intermittent production,depressurization heat exchange,and balanced production",and the technical breakthrough of hydrate exploitation process lies in"casing drilling,underwater suspension drilling,fracturing for medium injection,water transformation for pyrolysis,sand removal for drainage assistance,packing for strength improvement,and well pattern anchoring".Second,hydrate exploitation shall follow three principal development strategies(mild heat injection,balanced breaking and establishment,slow depressurization,low-speed exploitation;well pattern optimization,cyclic heating,stress monitoring,poor reservoir potential tapping;intelligence support,drilling first,material priority,cost reduction and efficiency improvement).In conclusion,the technologies for the efficient development of unconsolidated sandstone gas reservoirs act as actual enlightenment and reference for the innovation,improvement and development of hydrate exploitation technologies.At present,however,the researches on the mechanisms of hydrate exploitation and the field test of new technologies are incomplete.In the next step,it is necessary to opimization and improvement of research activities.关键词
疏松砂岩气藏/天然气水合物/弱成岩储层/开采方式/开采技术/开采技术政策Key words
Unconsolidated sandstone gas reservoir/Natural gas hydrate/Weak diagenetic reservoir/Exploitation mode/Exploitation technology/Exploitation technological policy分类
天文与地球科学引用本文复制引用
李江涛,胡高伟,王任一,项燚伟,纪云开,李润彤,张永年,冯大强..海域天然气水合物开采对疏松砂岩气藏开发技术的借鉴与创新[J].天然气工业,2025,45(4):193-202,10.基金项目
国家自然科学基金区域创新发展联合基金项目"南海水合物开采过程储层时空演变规律与声电响应特征"(编号:U24A20612)、国家自然科学基金项目"南海神狐海域水合物储层气—水-水合物三相共存微观机理研究"(编号:42206233). （编号:U24A20612）
