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| | The main gas bearing formations at Yulin region(well Shaan 141 area)of Changqing gas field in Eerduosi Basin are the high impedance sandstone reservoirs in Shanxi Formation,Lower Permian,Upper Paleozoic.The seismic works were beforehand involved in the natural gas exploration and well location disposition at the region in 1996.On the basis of the high resolution acquisition of seismic data,a set of techniques of effectively interpreting the thickness of the sandstone reservoirs in Shanxi Formation and d... | | 鄂尔多斯盆地长庆气田榆林区(陕141井区)的主要产气层是上古生界下二叠统山西组,1996年起地震工作提前介入该区的天然气勘探及井位部署。从高分辨率采集地震资料入手,重点采取了人机交互折射波静校正和分频处理等6项特色技术,利用测井约束地震高分辨率反演和高阻抗砂岩储层AVO分析等9项储层横向预测技术,创立了一套有效的山西组砂岩储层厚度解释及天然气检测技术,对山2段砂岩储层提供探井井位14口,预测成功率达85.7%。由此,盆地上古生界天然气勘探接连获得重要发现和重大进展,1997年榆林区提交了相对独立的近千亿立方米的天然气探明和控制储量。 | | 文摘来源 | | Drilling fluid viscosity has greatly affected gas detection logging. The experimental analyses of gas detection of various viscosity under different drilling fluid systems are made. Comparative relation of gas detection total hydrocarbon monitoring of different systems is worked out according to the experimental results. By optimization of the viscosity application scope of the different systems, the optimum viscosity value is deter mined. Logging gas detection interpretation standards of different drilling... | | 钻井液粘度对气测录井影响较大。对不同钻井液体系在不同粘度下气体检测的实验研究分析,得到了不同钻井液体系的气测全烃检测对比关系。通过不同体系粘度使用范围的优化,确定最佳粘度值,以天然气检测解释标准为例建立了不同钻井液体系的录井气体检测解释标准。实际应用表明,不同钻井液体系的气测录井资料的校正是必要的,也是可行的。 | | 文摘来源 | | In view of the characteristics of shallow-layer gas, such as shallow burial depth, complex genesis, small reserves, low abundance, many types and wide distribution, an improved AVO identification method is presented to predict the range of distribution of shallow-layer gas. This method is to determine the scope of angles in a gather through scanning and select an angle gather that can effectively reflect the nature of the shallow layers on the basis of conventional AVO identification technologies. The scope... | | 针对浅层气具有埋藏浅、成因复杂、储量小、丰度低、类型多和分布广的特点,提出了一种改进的AVO识别方法来预测浅层气的分布范围。该方法是在常规AVO识别技术的基础上,用扫描的方法来确定一个道集内的角度范围,优选出能有效反映浅层信息的角度道集。由于受到是否含气的影响,不同角度下地震振幅幅度不同。据此计算不同角度下的能量包络差剖面,进而找出有利的含气区。该方法的优点是:①由于是优选的针对浅层的角度道集,所以更能反映浅层的信息;②采用的是能量包络差的方式,可以反映出不同角度下的地震能量细微的变化,使识别的分辨率更高;③减小了系统误差。应用该方法在大庆长垣南部葡南油田黑帝庙油层进行了天然气检测,取得了令人满意的成果。 | | 文摘来源 | |   | | << 更多相关文摘 |
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