Research And Application Of SAGD Double Horizontal Well Drilling And Completion Technology In Fengcheng Super Heavy Oil

Xinjiang Fengcheng oilfield, which has17.25km2productive area,3941.96×104t reserve volume, is the heavy oil reservoir of block self-contained. Lots of resources of oil and gas need to produce depending on the new technology. Currently the recovery ratio is low which using the vertical wells, conventional horizontal well to exploit. This paper research the experience of using SAGD horizontal in domestic and foreign, and analyses the problem of using SAGD horizontal well drilling and completion technology in Fengcheng super heavy oil reservoir, and put forward some measures to solve the problems.At present, there are two methods, which are CHOPS and thermal recovery, to exploit heavy oil in domestic and foreign. in particular, the thermal recovery is the main way to recover heavy oil. Especially exploit the problem of recovery the heavy oil and the super heavy oil. Thermal recovery include Steam huff and puff, Steam flooding, In-situ combustion, SAGD steam assisted gravity drainage, hot water flooding and electromagnetic heating. In Xinjiang oilfield, the recovery rate is not ideal with vertical wells and horizontal wells in the early stage of conventional mining, In order to improve the efficiency of heavy oil reservoir exploitation, Xinjiang oilfield attempt to use SAGD mining technology that it is successful in some oilfield of domestic to mining the heavy oil reservoir and currently SAGD technology has successful apply in heavy32, district37in Fengcheng oilfield.In this paper, through the investigation and analysis of domestic and foreign shallow heavy oil recovery technology application and the objective problems with the process of the oil extraction pump submergence not enough in shallow double horizontal wells in heavy oil production, combined with Xinjiang Fengcheng super heavy oil geological features, finished the following work.1, In this paper,the author analyzed and summarized the application of SAGD and SAGD-straight well drilling technology in heavy32district and heavy37district of Fengcheng oilfield.2. Designed the mathematical model, which can minimize the drill string drag, to meet the requirements of drilling, oil production process requirements;3.Put forward a completion principle and technological of SAGD horizontal well measures that is suite for the shallow super heavy oil of Fengcheng oilfield and formulated a set of SAGD horizontal well completion process.4.1n view of the SAGD mining technology of ultra shallow super heavy oil problems, put forward the scheme of SAGD combined with vertical well drilling, and form a complete set for SAGD with vertical well gravel packing sand control completion project.The results of this study prove a feasible way for the efficient development of super heavy oil reservoirs in Xinjiang oilfield, It has vast importance to promote the economic construction of Xinjiang and ensure national energy supply.