Parameters of index diminishing method in SEC standard evaluation of oil and gas reserves

Using single factor analysis method,the Arps diminishing curve equation of the index diminishing method in the SEC standard evaluation of oil and gas reserves was studied.The main controlling factors for reserve evaluation were classified into 2 types,the reservoir ones and the economic ones.Several mathematical equations between the controlling factors and the SEC reserves were established.In this way,the influencing laws and degrees of the controlling factors on the SEC reserves were determined quantitatively.The evaluation results were improved by adjusting the quantitative relationship among the controlling factors.The investment for new petroleum exploration blocks was reduced and the SEC oil and gas reserve substitution rate was stabilized.