인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
DBpia AI
AI 에이전트
AI 아이디어
AI 리더
AI 뷰어
Citeasy
크롬 서지관리 다운로드
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
Abstract In this study, we calculate stress perturbations around the salt diapir in the Shizigou salt system of Qaidam Basin, China, by using a three-dimensional finite element model. Our goal is to identify safe mud weight windows around the salt in this complex region. We establish the salt-system geomechanical model by integrating seismic and logging data and inputting rock material properties and regional background stress field. The results show that the presence of the gypsum salt layer and structural decoupling lead to variations in principal stress directions ( $$\:{\sigma\:}_{2}$$ and $$\:{\sigma\:}_{3}$$ ) above and below the salt. Stress perturbations around salt rocks, or mechanical compaction effects from the salt rocks, are closely related to their geometric shapes and regional background stress field. Mismatches between the hydrostatic drilling fluid (mud) pressure and formation pressure can induce the drilling accidents. Therefore, based on model stress results, formation pore fluid pressure, and the Drucker–Prager plastic criterion, we conduct a drilling risk assessment. We find that drilling through large-scale concave salt structures is relatively safe with wide safe drilling windows, but at other locations, safe drilling windows are narrow. The stricter condition (wellbore collapse width less than 120°) reduces the range of the safe drilling window at salt convexities by 60%. Our study, through the establishment of a geomechanical model, provides practical insights for reducing drilling risks and designing drilling mud weights and routes.
#Offshore geotechnical engineering
#Geology
#Structural basin
#Drilling
#China
#Salt (chemistry)
#Petroleum engineering
#Field (mathematics)
#Stress field
#Drilling fluid
#Oceanography
#Geochemistry
#Mining engineering
#Geotechnical engineering
#Geomorphology
#Engineering
#Geography
#Archaeology
#Mechanical engineering
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
최근 본 자료 전체보기
