AN INTEGRATED ASSESSMENT OF FAULT SEALING FOR OILFIELD A IN LUFENG SAG OF PEARL RIVER MOUTH BASIN
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摘要:
珠江口盆地断圈构造整体勘探的成功率不高，而断层封堵性的研究对于提高断圈钻探成功率尤为重要。近年来，进展主要体现在考虑地应力因素、定量评价泥岩涂抹、考虑断面立体形态等方面。以陆丰凹陷A油田典型断圈构造为例，采用上述新的技术手段，开展了断层封堵性综合评价，剖析原因认为，断面应力、断面SGR值以及断貌的差异决定了不同断块的成败，为类似断圈的勘探提供了很好的借鉴思路。
Abstract:The success rate of drilling for fault structure traps in not high in the Pearl River Mouth Basin, and the study of fault sealing is particularly important for enhancing the success rate. In recent years, the technical progress of fault sealing study is mainly reflected in the aspects of consideration of stress factors, quantitative study of shale smears, and consideration of the three-dimensional shape of the sections. A typical fault trap, the Oilfield A in the Lufeng sag, is selected as an example for such an integrated assessment following the ideas mentioned above. The key reasons for the success or failure of the different fault blocks has been analyzed individually. It is found that the stress difference, SGR difference, appearance difference on section are the reasons to cause the failure in one fault block. The experiences provided by the case is valuable for drilling in similar fault structure traps.
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Key words:
- fault sealing /
- stress on section /
- SGR /
- shale smear /
- three-dimensional shape of the section
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