Oil & Gas Geology ›› 2007, Vol. 28 ›› Issue (6): 856-862.doi: 10.11743/ogg20070623

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A discussion on development strategies for the Ordovician fractured-vuggy carbonate rock reservoirs in Tahe oilfield

Li Zongyu   

  1. Northwest Oilfield Company, SINOPEC, Urumqi, Xinjiang 830011, China
  • Received:2007-08-09 Online:2007-12-25 Published:2012-01-16

Abstract:

The Ordovician reservoir in Tahe oilfield is a typical fractured-vuggy carbonate reservoir.Both production performance and correlation studies show that conduit flow and seepage flow coexist in the reservoir.Caverns and associated fracture zones serve as flow and storage space for these reservoirs.The flow regime is characterized by typical conduit flow in the caverns and by seepage flow in minute fissure-pores.Based on flow regime and production characteristics,this paper,supported by fractured-vuggy reservoir model,studies the dynamic characteristics,production performances,water breakthrough,production decline and waterflooding under conduit flow and seepage flow conditions.It also discusses optimal production rate,productivity,and well pattern,and presents technical solutions of coning prevention,water plugging,and waterflooding for developing fractured-vuggy reservoirs.They can serve as guidance in the development and comprehensive management of the Ordovician reservoirs in Tahe oilfield.

Key words: conduit flow, seepage flow, production performance, development strategy, fractured-vuggy carbonate rock reservoir, Tahe oilfield

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