摘要
三湖地区北斜坡褶皱发育,相变快,生储盖组合优越,具备形成岩性地层气藏的构造背景和地质条件.由于本区储层厚度薄（1-3m）,缺乏三维地震资料,砂体分布难以准确追踪,导致岩性地层气藏勘探难以取得突破.已知气藏解剖和理论研究表明地层含气后会产生特殊的地震响应,通过地震异常信息研究,结合构造、沉积和成藏条件分析,发现驼西地区是岩性圈闭发育带,Tzh2井获得工业气流证明该区带具备形成岩性气区的潜力.
The north slope of the Sanhu area of the Qaidam basin, with its characteristic geologic features such as strong fold, rapid lithofacies variation, promising geologic setting, is prone to have stratigraphic and lithologic gas pools. However, as the reservoir beds are extremely thin （1-3 meters）, and lack of 3D seismic data, it is very difficult to identify the sand bodies and trace them laterally, resulting in a very low discovery rate of stratigraphic-lithologic reservoirs. Studies on producing gas trap and theoretical reasoning indicate that abnormal seismic response will be observed when the reservoir is gas accumulated. As a result, based on abnormal seismic response analysis, accompa- nied by studies on structural, sedimentary, and accumulation conditions, the Tuoxi belt was recognized as a lithologic trap region. A well, Tzh2, drilled afterwards in this belt, showed commercial gas, indicating promising potential of lithologic gas pool in this region.
出处
《地球物理学进展》
CSCD
北大核心
2008年第4期1190-1198,共9页
Progress in Geophysics
基金
中国石油天然气股份公司科技攻关项目(050110-3)资助
关键词
柴达木盆地
三湖地区
岩性地层气藏
坡折带
沉积
地震异常
Qaidam basin, sanhu region, lithologic＇-stratigraphic gas pool, slope-break, sedimentary, abnormal seismic response
