普光气田高含硫气井安全快速优质钻完井配套技术

普光气田是目前中国已发现的最大的高含硫天然气田，天然气储层埋藏深， 其天然气具有高温、高压、高含硫的特点，钻井面临喷、漏、塌、卡、斜、硬、毒等世界级难题。为此，围绕高含硫气井安全钻井技术、快速钻井技术和优质固井技术的科技攻关、配套和现场示范应用，形成了普光气田安全优快钻井集成配套技术：①配套了70 MPa封井器、内防喷工具组合为主的双加双井控装备，确定钻井液安全密度附加值，强化钻井液、加重料、堵漏材料的储备和硫化氢监测及检测，井控安全率达到了100%，井喷失控事故率为0；②普光陆相地层集成应用空气、雾化、泡沫、氮气、空气锤等钻井技术快速钻进易漏、易塌、地层出水出气等复杂地层，海相地层应用PDC+螺杆复合钻井技术，全井钻井周期平均缩短了33%，平均机械钻速提高了61.21%；③应用耐腐蚀防气窜胶乳水泥浆体系、高强低密度水泥浆体系并综合应用尾管悬挂、正注反挤、分级固井等工艺技术，技术套管固井合格率为94.7%，产层套管固井合格率达100%、优良率为83%。实现了该气田高含硫气井安全、快速、优质钻完井的目标。

Package of technologies for safe,fast and high-quality drilling and completion of high-H_2S gas wells in the Puguang Gas Field

Deep buried gas reservoirs have been found in the Puguang Gas Field,where natural gas is characterized by high temperature,high pressure and a high H2S content,so drilling engineers have to face the great challenge of seven world-class drilling difficulties including blowout,mud loss,well slough,sticking,well deviation,hard formation,and toxic gas.In view of this,through tackling with key problems and performing a lot of field practices,we have formed a package of safe,fast and high-quality drilling technol...