不规则地质体隐蔽圈闭识别模式与关键技术应用尝试——以扇体圈闭为例

Model and technologies of subtle traps identification in irregular geologic body: An example of fan body traps

不规则地质体隐蔽性强、识别难度大,用常规的理论与技术难以对其进行有效预测。地震沉积学的引入和地球物理技术的应用,为有效识别不规则地质体隐蔽圈闭提供了直接的理论指导和有力的技术支撑。建立地震属性、沉积微相和隐蔽圈闭三者之间的联系是对隐蔽圈闭进行有效识别的基础,地震相分析、小波分频特殊处理和相控随机非线性高精度储层反演等技术则是不规则地质体隐蔽圈闭识别的关键技术。对济阳坳陷车镇凹陷车15井区沙三下亚段各种扇体隐蔽圈闭的预测和勘探效果表明,"地震-地质一体化、理论-技术一体化"的不规则地质体隐蔽圈闭识别的研究思路与技术模式有较大的应用价值。

It is difficult to effectively forecast irregular geologic body by using common geophysical techniques because of its strong elusive features and great difficulties on identification. Seismic sedimentology and geophysical techniques provide favorable theory guidance and technical support for effectively forecasting subtle traps in irregular geologic body. Setting up correlative relationship among seismic attributes, sedimentary facies and subtle traps is the basis for effectively identifying subtle traps, and seismic facies analysis, wavelet frequency-division, facies controlling inversion are the key techniques. The prediction and exploration of fan body traps of lower Sha 3 member in Che 15 well field in Chezhen Sag show that the model of ＂integration of seismic and geologic, integration of theory and techniques＂ for subtle traps identifyication has greater application value.