Study On Optimization Of Development Scheme For Horizontal Wells In Thin Oil Reservoirs In Karamay Oil Field

At present, horizontal well development technology is developing rapid and applied world wide. In terms of horizontal well, plenty of experience is accumulated in horizontal well drilling and completion technology, geosteering technology and development technology in overseas. Meanwhile, the supporting technologies of horizontal well such as horizontal well drilling, completion and oil production technology are increasingly improved through the technical research and test during the National Ninth Five-Year and Tenth Five-Year Plan, and domestic horizontal well development technology enters into a new stage:to improve and perfect the technology for developing reservoirs efficiently and massively. Moreover, Xinjiang oilfield company deployed111horizontal wells including1multilateral horizontal well, and the oil reservoir encountering rate is up to91.8%, which set a new historical record.In this paper, according to the application and technical problems of developed horizontal well in Xinjiang oilfield company light oil reservoir, geological and productive characteristics of developed horizontal well in two different types of reservoirs, which includes low-amplitude and high permeability Cretaceous Hutubihe formation reservoir in Lu9Well Block of Luliang oilfield and low permeability Qingshuihe formation sandstone and conglomerate reservoir in Shinan31Block of Shinan oilfield, are mainly studied based on the technology application and productive theory of horizontal well at home and abroad. In addition, the optimization research of filter criteria, reasonable length, well trajectory, well position, well productivity, development mode, well pattern and reasonable well distance etc. is carried out, combined with the horizontal well application state of Che89, Cai135etc. sand light oil reservoir and naturally fractured volcanic reservoir, also considering some modern theory and methods like applied geology, well logging, reservoir engineering and reservoir numerical simulation and so on. Eventually, this paper presents a set of optimization method about horizontal well development of light oil reservoir, which is important for similar light oil reservoir to dispose and manage scientifically horizontal well, and lay foundation for studying the application of horizontal well in light oil reservoir.