CAJ | 학술논문

由于枯竭型储气库的产层压力低、运行周期长、注采气量大的特点，给钻井和固井质量提出了更高的要求。针对文23的地质特征和储气库设计要求，考虑储层保护、固井质量及盐层井段，提出三开次井身结构设计，生产套管设计金属气密封、P110钢级177.8 mm套管；技术套管段设计双密度水泥浆体系一次固井，生产套管段设计采用非渗透防窜增韧水泥浆体系，采用尾管悬挂+套管回接方式固井；三开设计使用低密度微泡钻井液体系，配合凝胶暂堵技术减少漏失及储层污染。形成的文23储气库钻井工程方案，为国内低压低渗枯竭型储气库钻井设计提供了技术借鉴。
유우고갈형저기고적산층압력저、운행주기장、주채기량대적특점，급찬정화고정질량제출료경고적요구。침대문23적지질특정화저기고설계요구，고필저층보호、고정질량급염층정단，제출삼개차정신결구설계，생산투관설계금속기밀봉、P110강급177.8 mm투관；기술투관단설계쌍밀도수니장체계일차고정，생산투관단설계채용비삼투방찬증인수니장체계，채용미관현괘+투관회접방식고정；삼개설계사용저밀도미포찬정액체계，배합응효잠도기술감소루실급저층오염。형성적문23저기고찬정공정방안，위국내저압저삼고갈형저기고찬정설계제공료기술차감。
The depleted gas storage is characterized by low formation pressure, long operational cycle and large quantity of injec-tion and production, which requires higher quality of drilling and cementing. Based on the geologic feature and design requirement of gas storage Well Wen23, and taking the reservoir protection, cementing quality and salt formation interval into account, the paper made the optimization of well proifle, casing string, cementing, drilling lfuid system and reservoir protection, and formed the drilling engineering design of Well Wen23. It provided a technical reference for drilling design of depleted gas storage of low pressure and low permeability reservoir in China.