基于灰色模糊理论的多参数碳酸盐岩储层评价

针对碳酸盐岩储层影响因素多、孔渗关系复杂、非均质性较强、储层评价难度大的实际，以四川盆地川中地区磨溪构造嘉二段碳酸盐岩储层为例，运用灰色模糊理论，优选孔隙度、渗透率、

MULTIPARAMETER CARBONATE ROCK RESERVOIRS EVALUATION BASED ON GREY FUZZY THEORY

According to the actuality that there are much reservoir influential factors,complex relation between porosity and permeability,intensive anisotropism and difficulties to evaluate to carbonate rock reservoirs,T₁j² carbonate rock reservoir in Moxi Structure,centre Sichuan is taken as an example,gray fuzzy theory is used and some elements for reservoir evaluation,such as porosity,permeability,water saturation,expulsion pressure,average pore throat radius,effective thickness,and permeability variation coefficient,dash coefficient and range and so on are optimized.Because of the perplexing relation existing among these evaluation elements,grey association analysis is used to definite the weight coefficients of evaluation elements,and fuzzy comprehensive distinguish method is used to evaluate quality of carbonate rock reservoir,thereby the relation and"uncertainty"of elements for reservoir evaluation is resolved.Evaluation results are well consistent with the actual production of gas and oil,which proves that the method of carbonate rock reservoir evaluation based on grey fuzzy theory is workable.