Method for predicting effective permeability of carbonate gas reservoir

• Main Authors: LAN YIFEI, HOU KEFENG, HE LEI, TIAN MIN, YOU LIANGRONG, HUO JUNZHOU, CAI FANG, XIE SHAN, AI QINGLIN, WANG DONGXU, HE YILIN, QIAO BO, WANG WENSHENG, XIA YONG, WANG SHUHUI, WU YONG, ZHANG JIANGUO, CAI XINGLI, ZHU CHANGRONG, LIU HAIFENG, XU YUNDONG, YUAN JIMING
• Format: Patent
• Language: Chinese; English
• Published: 01.05.2018
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention provides a method for predicting the effective permeability of a carbonate gas reservoir. Based on pressure recovery well-testing theory analysis and on the basis of influence factor analysis of a low-permeability carbonate reservoir, the relational expression of the effective permeability of the reservoir and pressure recovery data of wellhead sleeves as well as the relational expression of the effective permeability of the reservoir and wellhead yields are built, and a method for evaluating the effective permeability of gas wells through conventional production dynamic materials is formed. According to the method for predicting the effective permeability of the carbonate gas reservoir, the evaluation problem of the permeability of the low-permeability and high-density inhomogenous reservoir under the situation of lacking well-testing evaluation materials is solved, the evaluation range of the effective permeability of the low-permeability gas reservoir is widened by a large margin, and importa