Drilling Technology For Fishbone Branches Horizontal Well

Liaohe Oilfield has developed for forty years, which has been mid- late in development, the use of horizontal well and other complex structures drilling technology is stable and effective means to enhance oil recovery . herringbone type branching horizontal well technology is a new type of drilling and completion technology based on the mature application of horizontal wells and branch wells technology,. The technical content is based on the reservoir characteristics to design wellbore and distribution of boreholes, effectively increase the exposed area of the reservoir and improve the ultimate recovery, it is one of the advanced technology of oil-gas drilling .Herringbone type branching horizontal well technology is a systems engineering include reservoir, drilling and completion, mud and so on. It also includes a series of research difficulties from the geology to the drilling, completion to the oilfield chemistry. according to its construction features, start with the research of remaining oil distribution , optimize the borehole trajectory control by optimizing the geological design, engineering design, implementation process, summarize the trajectory of the implementation technology , which is up the first , the main sub-hole alternate implementation , put in the trajectory construction program ,for example vacant side of the drilling, composite side drilling. it provide technical support to effectively implement for herringbone type branching horizontal well . Through the drilling fluid system, the preferred completion method and eventually form the herringbone horizontal well drilling and completion methods to cater formation characteristics of Liaohe such as heavy oil, light oil, high pour point . herringbone slightly higher than the cost of horizontal well from the implementation of the situation, but the yield is 1.6 ~ 8.87 times more the latter, adopt effectively the reserves of hard use, reducing the cost of comprehensive development of horizontal wells. And Liaohe, Xinjiang oilfeild have been applied if , the promotion of drilling technology has reached maturity level, and promoted the domestic development of similar technologies .