Economic evaluation of single well in carbonate gas reservoirs,Sichuan Basin
Single-well economy was evaluated proactively to highlight the investment concept of optimal benefits and im-prove the scientific investment decision.And taken the cash flow as the calculation basis,the internal rate of return(IRR)as the core index,and the benchmark yield as the judgment criteria,an optimal association of IRR,single-well proration with investment was put forward for carbonate gas reservoirs with sulfur in Sichuan Basin.In addition,an economic model conditioned by sulfur content was built for gas wells with moderate,and high to extra-high sulfur.Results show that(i)for some reservoirs with moderate and high sulfur,the single-well investment limit ranges from 108.40 million yuan to 407 million yuan at the single-well proration of(8-30)×104 m3/d and the benchmark yield of 8%;(ⅱ)for the extra-sulfur res-ervoirs,the investment limit ranges from 276 million yuan to 828.2 million yuan at the proration of(20-60)×104 m3/d and the same benchmark yield;and(ⅲ)there is a risk that both single well and the scheme may not gain profits when the esti-mated single-well investment exceeds the investment limit.In conclusion,built for such moderate,and high to extra-high sulfur gas wells,the economic model can be used to set the investment goal of drilling and completion during the deploy-ment well location,geological and engineering design,and project implementation of single well in carbonate gas reser-voirs.Additionally,a warning system can be established for dynamic well management,and the subsequent investment-con-strained measures can be made to predict drilling and completion investment targets in the decision-making and implemen-tation stages,which offers guidance for optimizing technical and economic indexes and advancing reservoir's economic de-velopment.
Sichuan BasinCarbonate gas reservoirSingle-well investment limitEconomic evaluationIRR
NETL
NSTL
万方数据
