【摘要】：瑪湖凹陷及周緣下二疊統(tǒng)—石炭系發(fā)育一系列繼承性構造圈閉,埋深普遍超過6000m,成藏條件優(yōu)越。通過優(yōu)選,選擇最為有利的達1井背斜作為油氣勘探的突破口。石炭系是否發(fā)育有效儲層,圈閉流體相態(tài)及油氣成藏模式是什么,是達1井背斜石炭系構造圈閉勘探能否獲得成功亟待解決的關鍵問題。在單井資料匱乏的情況下,通過重磁電等資料與已鉆井資料標定,認為達1井背斜石炭系發(fā)育中基性火山巖風化殼儲層,儲層物性相對較差;根據(jù)瑪湖地區(qū)烴源巖演化階段、地震層速度、淺層試油等資料預測達1井背斜為氣藏;通過構造演化及烴源巖分析,認為達1井背斜為源邊多期不整合側向運聚成藏。綜合儲層、流體相態(tài)、成藏條件及埋深等因素,分析認為,達1井背斜具備優(yōu)越的油氣成藏條件,有望獲得重大突破并發(fā)現(xiàn)規(guī)模大氣田。
[Abstract]:A series of inherited structural traps have been developed in Mahu depression and the Lower Permian Carboniferous in the surrounding area. The buried depth is generally over 6 000 m and the reservoir forming conditions are superior. The anticline, which is the most favorable well, is chosen as the breakthrough of oil and gas exploration. Whether the effective reservoir is developed in Carboniferous system, what is the phase state of trap fluid and the model of hydrocarbon accumulation are the key problems to be solved urgently whether the exploration of Carboniferous structural trap in well Da-1 anticline is successful or not. In the case of lack of single well data and calibration of gravity, magnetoelectric and other data with well drilling, it is considered that the anticlinal Carboniferous developed weathering crust reservoirs of middle basic volcanic rocks in well Da-1, and the reservoir physical properties are relatively poor, according to the evolution stage of hydrocarbon source rocks in Mahu area, Through structural evolution and source rock analysis, the anticline of well Da-1 is considered to be a multi-stage unconformable lateral migration accumulation reservoir. By synthesizing the factors of reservoir, fluid phase, reservoir forming condition and burial depth, it is concluded that the anticline of well Da-1 has superior oil and gas reservoir forming conditions, which is expected to make a major breakthrough and to find large scale gas field.
【作者單位】： 中國石油新疆油田公司勘探開發(fā)研究院;中國石油勘探開發(fā)研究院;
【基金】：國家“973”項目(2011CB201101) 國家科技重大專項(2011ZX05001-06)
【分類號】：P618.13

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1 王博;武威盆地石炭系烴源巖地球化學特征研究[D];西安石油大學;2017年

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