Abstract: X42-X51 reservoir of Kekeya condensate gas field is a low permeability gas reservoir. For rational exploitation of this reservoir, the exploitation methods such as suitable well pattern and horizontal drilling technology are studied. On the premise of the main structural framework, basic reservoir characteristic and original fluid phase behavior property of X42-X51 condensate gas reservoir, an analogy model for high and low permeability-mixed distribution is developed. Applying numerical simulation technology, the methods for exploitation of the condensate gas reservoir with low permeability are studied. The results show that location of well in high permeability area benefits the production of both high permeability area and low permeability area; horizontal well/drilling is of high productivity and low pressure difference, hence, the recovery of gas or condensate could be enhanced obviously and the development period of such field be effectively reduced.

Key words: Yecheng, Kekeya condensate gas field, low permeability, condensate reservoir, exploitation study, numerical simulation