Application Of Multilateral Well Drilling Technique In Z201 Block Of DaQing Oilfield

When Daqing oilfield enters the high water exploitation stage, the study of new economy drilling technique to dig latent surplus has become an important research case for sustainable development of oilfield. The multilateral well technology was high and new technology in the 1990s and could develop multilayer and thin oil reservoir efficiently and economically , so conducting a research of the multilateral well technology and drilling in oilfields play an important role in the sustainable development of Daqing oilfield.The paper is under the study of technology theory in the multilateral well path controlling,drilling fluid,the well completion,cementing well technology after traversing of reserve geology in Z201 block, applies research result to Z201 block , finds strata suited for using multilateral well drilling technology and sets down developing plan; traversing the multilateral well path, the landing point and the controlling point are applied in order to keep the multilateral well path in the right strata to the utmost; the technology of the multilateral well path section,path controlling technology and the geo-steering drilling technology is set to fitting Z201 block; the drilling fluid fitting the need of drilling and production is set according to the strata characters; the technology of the way of well completion,the well profile,Cementing well and running casing string into hole according to the condition of Z201 block and the need of oil production are researchedThe successful drilling of ZF31-P28 well indicates that the technology of drilling and exploitation has gone ahead in Daqing oilfield, and the technology of multilateral well will play a significant role in improving the effect of surplus oil and low permeability field in Daqing oilfield at the same time. The multilateral well technology will have the vast application prospect in Daqing oil field.