准噶尔盆地卡拉麦里山前平地泉组勘探潜力

Exploration Potentials of Pingdiquan Formation of Permian in Kelameili Piedmont of Junggar Basin

卡拉麦里山前地区二叠系平地泉组以冲积扇-扇三角洲相沉积为主,储集层岩性以粉砂岩、泥质粉砂岩为主,总体评价为较差-中等储集层。研究表明,裂缝是改善储集层渗流条件的重要因素,裂缝和溶洞较为发育的白云质泥岩具有较大勘探潜力。目前已发现该区以勘探难度较大的岩性圈闭及地层-岩性圈闭为主,油藏类型以岩性、岩性-地层型油藏为主。综合分析认为,卡拉麦里山前地区包含彩46区、沙帐区、大5北区、大1—大5井区及大5井东等5个勘探有利区。

The Pingdiquan formation of Permian in the annular Kelameili piedmont area of Junggar basin is dominated by alluvial fan and fan-delta in sedimentary facies,siltstone and shale siltstone in reservoir lithology,belonging to poor-medium reservoir in overall evaluation.The study shows that fracture is the key factor for improving the Darcy flow conditions of the reservoir rocks and the dolomite mudstone strata enriched with fractures and vugs have the good petroleum exploration potentials.At present,the petroleum exploration objects are dominated by lithologic trap and stratigraphic-lithologic trap,and the reservoir types dominated by lithologic reservoir and lithologic-stratigraphic reservoir.The comprehensive analysis suggests that there are five favorable areas for petroleum exploration in Kelameili piedmont of Junggar basin,these are,C46 area,Shazhang area,north D5 area,D1-D5 Wellblock and east D5 Well.