井筒隔热技术在东胜气田开发中的应用评价

Application evaluation of wellbore thermal insulation technology in Dongsheng gas field development

天然气开发中传统高压集输工艺和井下节流中低压集输工艺均存在一定的问题,为此,引入井筒隔热技术进行现场试验评价,基于试验数据和模拟论证,评价了隔热技术应用的可行性和经济性。现场试验及研究论证表明,单井采用井筒隔热技术后能够提高井口温度近20℃,集气站所辖气井整体采用井筒隔热技术后,进站温度均提升10℃左右,对应水合物生成压力大于5.8 MPa,满足不注醇、不加热中压集气生产要求,能简化生产管理、降低生产成本,提高开发效益。经济性论证表明,相比现有生产方式,2年可收回增加的投资,规模应用后经济效益更加明显。

In view of the defects of traditional high-pressure gathering and transportation technology and downhole throttling medium and low-pressure gathering and transportation technology in natural gas development,the wellbore thermal insulation technology is introduced for field test evaluation.Based on test data and simulation demonstration,the feasibility and economy of thermal insulation technology application are evaluated.Field tests and research demonstration show that the wellhead temperature of single well can be increased by nearly 20℃after adopting wellbore thermal insulation technology,and the inlet temperature of gas wells under the jurisdiction of gas gathering station can be increased by about 10℃after adopting wellbore thermal insulation technology as a whole,and the corresponding hydrate formation pressure is greater than 5.8 MPa,which meets the production requirements of medium pressure gas gathering without alcohol injection and heating,and has the advantages of simplifying production management,reducing production cost and improving development efficiency.The economic demonstration shows that compared with the existing production mode,the increased investment can be recovered in two years,and the economic benefit is more obvious after the scale application.