吐哈盆地台北凹陷葡萄沟地区岩性油气藏勘探技术及效果分析
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摘要
吐哈盆地台北凹陷葡萄沟地区受后期构造活动掀斜作用的改造,形成了岩性油气藏的构造背景。葡萄沟地区中侏罗统主要目的层砂、泥岩纵向上薄互层分布及横向上相变急剧的展布格局,砂、泥岩波阻抗分异能力差等因素,使该区岩性圈闭预测十分困难。在油气勘探的过程中,以层序地层学和沉积微相研究为基础,采用岩性测井曲线重构反演、地震属性分析、地震子波吸收分析、平点等技术手段,有效地预测并评价了岩性圈闭及油气藏的发育条件。经近几年的勘探技术攻关,发现了葡萄沟地区构造—岩性油气藏富集带。
The Taibei sag is changed by the tilting action of late structural movement, so the structure of lithologic reservoir is formed. The prediction of lithologic traps gets very difficult due to the vertical distribution of thin interbeded layers of sandstone and mudstone which are the major target strata in middle Jurassic formation of Putaogou zone, the sharp horizontal phase change, and the small difference of wave impedance characteristics between sandstone and mudstone. This paper makes an effective prediction and evaluation of the growth conditions of lithologic traps and reservoirs in the process of exploration, based on the technologies including sequence stratigraphy, sedimentary microfacies study, lithologic logging curve rebuilding inversion, seismic attribute analysis, the absorption analysis of seismic wavelet. Through the research of the exploration technology for years, rich hydrocarbon accumulation zones of structure and lithologic reservoirs in Putaogou zone are found.
The Taibei sag is changed by the tilting action of late structural movement, so the structure of lithologic reservoir is formed. The prediction of lithologic traps gets very difficult due to the vertical distribution of thin interbeded layers of sandstone and mudstone which are the major target strata in middle Jurassic formation of Putaogou zone, the sharp horizontal phase change, and the small difference of wave impedance characteristics between sandstone and mudstone. This paper makes an effective prediction and evaluation of the growth conditions of lithologic traps and reservoirs in the process of exploration, based on the technologies including sequence stratigraphy, sedimentary microfacies study, lithologic logging curve rebuilding inversion, seismic attribute analysis, the absorption analysis of seismic wavelet. Through the research of the exploration technology for years, rich hydrocarbon accumulation zones of structure and lithologic reservoirs in Putaogou zone are found.
引文
[1]王劲松,李斌,刘护创,等.台北凹陷葡萄沟—胜金口地区精细目标研究与勘探实践[J].石油天然气学报,2005,27(6):843～846.
[2]何登发.断裂—岩性体油气藏特征[J].石油学报,2007,28(2):22～28.
[3]石玉,李宗杰.塔河油田三叠系岩性圈闭识别与评价技术[J].新疆石油地质,2007,28(3):375～378.
[2]何登发.断裂—岩性体油气藏特征[J].石油学报,2007,28(2):22～28.
[3]石玉,李宗杰.塔河油田三叠系岩性圈闭识别与评价技术[J].新疆石油地质,2007,28(3):375～378.
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