Dynamic simulation of double-cased perforation in deepwater high temperature and high-pressure oil and gas wells  

作　　者：Gang Bi Fei Han Jie-Min Wu Pei-Jie Yuan Shuai-Shuai Fu Ying Ma 

机构地区：[1]Shaanxi Key Laboratory of Well Stability and Fluid&Rock Mechanics in Oil and Gas Reservoirs,Xi'an Shiyou University,Xi'an,710065,Shaanxi,China [2]College of Petroleum Engineering,Xi'an Shiyou University,Xi'an,710065,Shaanxi,China

出　　处：《Petroleum Science》2024年第5期3482-3495,共14页石油科学（英文版）

基　　金：the support of the Foundation of Natural Science Foundation of Shaanxi Province, Grant/ Award nos. 2023-JC-YB-361;National Natural Science Foundation (Number 52104033)。

摘　　要：In order to ensure the penetrability of double-cased perforation in offshore oil and gas fields and to maximize the capacity of perforation completion, This study establishes a dynamic model of double-cased perforation using ANSYS/LS-DYNA simulation technology. The combination of critical perforation parameters for double casing is obtained by studying the influencing factors of the jet-forming process,perforation depth, diameter, and stress changes of the inner and outer casing. The single-target perforation experiments under high-temperature and high-pressure(HTHP) conditions and ground full-scale ring target perforation tests are designed to verify the accuracy of numerical simulation results. The reduced factor is adopted as the quantitative measure of perforation depth and diameter for different types of perforation charge under different conditions. The results show that the perforation depth reduction increases with temperature and pressure, and the reduced factor is between 0.67 and 0.87 under HTHP conditions of 130℃/44 MPa and 137℃/60 MPa. Comparing the results of the numerical simulation and the full-scale test correction, the maximum error is less than 8.91%, and this numerical simulation has strong reliability. This research provides a basis for a reasonable range of double-cased perforation parameters and their optimal selection.

关 键 词：Deepwater HTHP Double-cased perforation Optimization of perforation parameters Dynamic simulation Full-scale perforation simulation 

分 类 号：TE52[石油与天然气工程—油气田开发工程]