| In recent years the domestic new proved reserves has a (special) low permeability, thin oil layer, fault, heavy oil, oil-water interbedding wait for a characteristic, including low permeable oil fields of new proved reserves accounted for80%of the overall trend for reservoir physical property is more and more bad, the development difficulty is more and more big. Sidetracking is increase note conventional measures, compared with other measures targeted with strong, sweep range, applicable scope and the range of increasing in less damage on the formations, etc., to other conventional measures can’t act well very applicable, can achieve the purpose of remaining oil mining, and extend the economic production life, more play adjustment well is not economic, effective use of the wellbore, well field, avoid accident section, out of the water, geosteering drilling oil and gas FuJiOu, and lateral drilling can be flexible adjustment well type for vertical well and directional well and horizontal well or branch well, is a large area can be involved in oil and gas accumulation, especially sidetracking horizontal, branch well, and sweep efficiency than conventional vertical well big ten times, cost but increase30-50%, can yet be regarded as remaining oil redevelopment, accident well resurrection and old transformation a good way. This article through studies sidetracking in solving accident well, problem well or die well recovery and resurrection aspects of the flexible characteristic, and with2008years successful sidetracking king side11-17, the king side9-16and2Wells as an example, the study of geological choose well, setpoint window, drilling, oil production supporting and economic analysis, analysis of sidetracking in ansai oilfield adaptability and economy, and to discuss the measures in ansai oilfield promotion prospects。... |
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