The Kekeya Gas Condensate Reservoir Water Influx And Dynamic Calculation Of Reserves Study

KeKeYa gas condensate field which located in the Southwest of Tarim Basin edge, is the first discovered gas condensate field in China. It has been 23 years Since KeKeYa gas condensate field formally put into production in1988, the gas field has entered into the middle of development, a variety of contradictions and problems are, emerging gradually, Such as formation pressure is generally low, heavy components retrograde condensate in the strata, water production rise, remaining reserves distribution is unknown, etc. These have caused adverse impact on the current development and production and the future secondary development scheme of gas field.Aiming at present development situation of KeKeYa, Tarim Oilfield research institute and southwest Petroleum university jointly launch a task named that" The development dynamic analysis and the development regularity study of KeKeYa Neocene gas condensate field".This thesis is one of its essential research content. The research of aquifer influx and dynamic reserves which this paper expounds have positive significance to analysis driven energy and to ascertain remaining reserves of KeKeYa gas condensate field, and it provide reliable basis for development and production and the secondary scheme adjustment of KeKeYa.Because the development of KeKeYa gas condensate field is early, and the original water information are seriously absent, water parameters which conventional aquifer influx computational method required is few, it is very difficult to compute aquifer influx. After investigating extensive literature, this paper establish a new method which is suitable for KeKeYa gas reservoir aquifer influx computation named that aquifer influx and dynamic reserves computational method which combined with the material balancethe. This method use Laplace transform numerical inversion to establish aquifer influx solution model, combine with material balance equation to establish multi-objective optimization model, and calculated aquifer influx and dynamic reserves simultaneously by genetic algorithm. This method does not need static parameters which are related to water and hard to define. It just have to know reservoir development dynamic production data to calculate dynamic reserves, accumulated aquifer influx and water region rapidly. After using this method to calculate each productive series of KeKeYa condensate field, we can found that computation method is simple and rapid, computation result is accurate and reasonable, the method has high practical value.