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With the oil exploration and development and control of water-stable oil increase the difficulty of low permeability reservoir has become oilfield oil and gas exploration , tapping the potential synergies important goal . Cattle Oilfield King 68 is in such a reservoir , the block main oil-bearing sand three typical low porosity and permeability characteristics . The block after more than 10 years of development , block the development of the obvious contradiction : First, long-term rely mainly on the development of natural energy , the formation energy decreased faster formation deficit , oil well production decline , most of the wells can only remain low liquid volume production ; well spacing , well spacing density , low production rate , low recovery well network has been difficult to meet the requirements of efficient development ; flat and vertical on reserves uneven , the main layer and the effective thickness of the well area utilized by a high degree of non-main thin layer and the effective thickness of the well area utilized low ; just a well for water injection experiments , did not establish an effective injection patterns and systems , injection the correspondence rate waterflood reserves control low level of energy supplement poor , there is an urgent need to supplement the formation energy by improving the injection patterns . In order to solve the above contradiction , for the characteristics of the block , from the following aspects to carry out research work : First, the block is carried out fine reservoir description , reservoir Sand Three vertical and plane distribution characteristics of in-depth study , reservoir properties , fluid properties , temperature and pressure and reservoir type described ; Second , a comprehensive evaluation of the effect of pre-development to identify the main factors affecting the development effect and raised the potential and direction of development adjustment ; Third, through the numerical reservoir simulation , and other means , well spacing density , well pattern , well spacing size , choice of injection timing and injection-production ratio was optimized. On this basis, the development of the block adjustment programs . Through this study , 68 for the king of low permeability reservoir geological features , reservoir geology research -based , well pattern , well spacing size , well spacing density . Injection-production ratio is optimized for the core of the system to improve the king 68 reservoir development , and has a relatively large significance for guidance the king 68 as well as the development of similar reservoirs , enhanced oil recovery .
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