Evaluation On The Development Effect And Adjustment Countermeasures Of Horizontal Wells In Putaohua Reservoir In Changyuan Oilfield

The horizontal well technology has been applied successfully on a large scale in Daqing Placanticline of Putaohua oil layer,but the development of horizontal well has appeared some problems such as water-cut rising rising rapidly and the production decreased greatly in recent years.Therefore we carry out the research on development integral adjustment of horizontal well Technology in Daqing Placanticline of Putaohua oil layer.Technological achievements have been achieved as follows: Evaluation index has been optimized and effect evaluation has been completed for horizontal well development by multi-level fuzzy mathematics method.Horizontal well development adaptability evaluation system has been established from three aspects to make system evaluation for horizontal well development adaptability,one is from matchs of pattern and geological conditions,another is from perfect conditions for injection-production system,the last is process measures and effects.The development adjustment of technology boundaries have been improved for horizontal well and measure screening method has been established.The next step adjustment potential has been implemented.The corresponding adjustment countermeasure has been made for horizontal well development effect,the adaptability evaluation results and problems.12 ways of regulating methods has been implemented for three aspects of Injection-production system,Horizontal well measures and water injection adjustment.The method has been applied successfully on a large scale and enhanced the horizontal well development level significantly including the adaptability evaluation technique,the development regular rule,the development adjustment methods of horizontal well development technique in Daqing Placanticline of Putaohua oil layer.And according to the unproducing reserves of Fuyang layer,the special low abundance of reserves of Sapu layer,the adaptability evaluation technique,the development regular rule,the development adjustment methods of horizontal well will have directive significance,and the application of the technology is very broad.