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水平井是通过扩大油气层泄漏面积来提高油气井产量,提高油田经济效益的一项开发技术。水平井开发技术实现了少井高产、提高采收率,已列为当今石油工业最重要的关键技术之一。随着钻井技术水平的不断提高和油田开采进入后期,水平井的应用越来越广泛。2008年是涩北台南气田“建成产能一百亿,实现气田大发展”的开局之年,在青海油田也进行了一系列水平井的开发和实施。水平井和直井相比,具有单井产能高(一般为直井的2-3倍)、穿透产层长、可有效增加油气层的泄漏面积,提高油气采收率。目前国内外的水平井修井技术已经推广应用,而我们才开始起步,技术还不成熟。需要进一步探索和研究。
Horizontal well is a development technology that can increase the production of oil and gas wells and increase the economic benefit of oilfield by enlarging the leakage area of oil and gas layers. Horizontal well development technology to achieve a low yield and improve oil recovery has been listed as one of the most important key technologies in today’s oil industry. With the continuous improvement of drilling technology and oil field mining into the late, horizontal wells are more and more widely used. 2008 is the first year of Sebei gas field in T’ai-ch’ing province, with a built-in annual production capacity of 10 billion yuan and great gas field development. A number of horizontal wells have also been developed and implemented in Qinghai Oilfield. Compared with vertical wells, horizontal wells have single-well productivity (usually 2-3 times that of vertical wells), which penetrates the pay zone and effectively increases the leakage area of oil and gas reservoirs and enhances oil and gas recovery. At present, the horizontal well workover technology at home and abroad has been popularized and applied, and we have just begun to start the technology is not yet mature. Need to further explore and research.