张　洪

(中国石油大学石油工程教育部重点实验室，北京102249)

厄瓜多尔奥连特盆地下Napo组页岩气资源潜力评价

张洪

(中国石油大学石油工程教育部重点实验室，北京102249)

摘要：针对厄瓜多尔富油贫气的现状，评价其主要含油气盆地——奥连特盆地页岩气勘探潜力。给出了页岩气储层标准，通过对奥连特盆地岩性、地球化学指标、深度、分布稳定性及资料完善程度诸方面综合分析，优选出下Napo组页岩作为具有页岩气勘探潜力的地层。并研究其成藏条件，利用不同区块38口井测井解释成果，获得页岩厚度分布及变化趋势，通过29条地震测线解释成果，研究了下Napo组页岩在盆地内的变化趋势，综合前人研究成果及地球化学指标，预测了盆地下Napo组页岩气勘探有利区。结果表明，盆地的东部地区 (12区块、67区块、18区块、 31区块及 63区块)和西北地区(11区块、18区块)对页岩气勘探开发相对有利，其次是西部地区(29区块、20区块、22区块、28区块、70区块)，研究成果为厄瓜多尔奥连特盆地页岩气勘探指明了方向。

关键词：厄瓜多尔；奥连特盆地；页岩气；勘探开发有利区

Potential Assessment on Shale Gas in Lower Napo Formation of

Oriente Basin, Ecuador

Zhang Hong

(MOEKeyLaboratoryofPetroleumEngineering,ChinaUniversityofPetroleum,Beijing102249,China)

Abstract:For more petroleum and less gas in Ecuador, we assessed the shale gas exploration potential of its main oil and gas bearing basin, Oriente Basin. We gave the shale gas reservoir criteria, and analyzed lithology, geochemical factors, depth, distribution stability, and data perfection, and chose the shale in lower Napo Formation in the Basin as promising. We probed into its reservoir forming conditions, used the logging interpretation results of 38 wells in different blocks and obtained shale thickness distribution and variation trend. Through the interpretation results of 29 seismic lines, we studied the variation of the shale in lower Napo Formation in the Basin, and utilized previous research results and geochemical factors to predict the favorable areas for shale gas exploration in lower Napo Formation. Results showed that the eastern areas (Block 12, Block 67, Block 18, Block 31 and Block 63) and the northwestern area (Block 11 and Block 18) were more favorable for shale gas exploration and development, followed by the western area (Block 29, Block 20, Block 22, Block 28 and Block 70). The results showed the way for shale gas exploration in Oriente Basin.

Key words:Ecuador; Oriente Basin; shale gas; favorable exploration and development area

奥连特 ( Oriente) 盆地是南美洲厄瓜多尔最主要的含油气盆地, 盆地类型为弧后前陆盆地，位于厄瓜多尔东部亚马孙平原区, 面积约10×104km2；北部与哥伦比亚毗邻，东部与秘鲁接壤[1](图1)。许多学者描述了该盆地的石油地质特征[2-3]，其主要烃源岩为Napo组黑色页岩，作为一个大的前陆盆地系统，在哥伦比亚相当于Villeta组(普图马约盆地主要烃源岩)，其次为Santiago 组页岩[4-9]；……