姬黄37区长2油层组油气富集规律

Hydrocarbon Enrichment Law of Chang 2 Reservoir in Block Jihuang 37

摘要: 姬黄37区延长组具有良好的资源潜力，长2油层组是其主要的产层之一。结合研究区基本地质条件对油藏进行剖析，长2油层组发育构造–岩性油气藏、透镜体油气藏、上倾尖灭油气藏。长2期油层组为一小角度的西倾单斜，发育了多个鼻状隆起构造，控制着油气的分布；三角洲平原沉积中的分支河道砂体是主要的储集层，其叠置区及发育较好的单分支河道控制油藏分布。分流河间洼地泥岩的遮挡和封盖是区内油藏形成的必要条件，紧邻古河和不整合面的上倾有利部位利于油藏富集。

Abstract: Yangchang Formation in Block Jihuang 37 had good resource potential force, Chang 2 Reservoir was one of the producing zones in the formation. The reservoir was analyzed combined with the basic geological condition in the study area, the results indicated that in Chang 2 Reservoir, there developed tectonic-lithologic reservoir, lenticular oil and gas reservoir and updip pinch out oil and gas reservoir. Chang 2 Reservoir was a small angle westward dip monoclinic one, where many nose-shaped uplift structures were developed to control the hydrocarbon distribution. The distributary channel in the delta plain sediments is the main reservoir, its stack area and well-developed single-branch channel control the reservoir distribution. The shielding and cap-ping of mudstone in the interdistributary river depressions are the necessary conditions for oil reservoir formation in the study area, the favorable position in the vicinity of the ancient river and the unconformable surface is beneficial for the enrichment of reservoirs.