辫状河三角洲岩相特征及沉积模式——以鄂尔多斯盆地苏南地区盒8段为例

发布时间：2018-01-24 02:02

本文关键词： 岩相辫状河三角洲沉积模式盒段苏南地区鄂尔多斯盆地　出处：《岩性油气藏》2017年01期 　论文类型：期刊论文

【摘要】：鄂尔多斯盆地苏南地区盒8段是苏里格气田重要的储集层,为搞清研究区目的层的岩相特征及沉积模式,对22口井的岩心进行了观察描述,共识别出8种岩相和4种岩相组合类型,并根据测井曲线的形态特征、接触关系等,对167口井的测井曲线进行了分类,建立了测井相模板;结合岩相和测井曲线特征,又划分出8种沉积微相。最后总结出4种岩相组合在沉积模式中的分布特征为:组合类型A分布于北部辫状河三角洲平原,组合类型B分布于北部辫状河三角洲平原和前缘的过渡带,组合类型C分布于南部辫状河三角洲前缘的河道发育区,组合类型D分布于西南部辫状河三角洲前缘的深湖区。
[Abstract]:In order to understand the lithofacies characteristics and sedimentary model of the target layer in Sulige gas field, the Ke8 formation in the southern part of the Ordos Basin is an important reservoir. The cores of 22 wells are observed and described. Eight types of lithofacies and four types of lithofacies combination were identified. According to the morphological characteristics of logging curves and contact relationship, the logging curves of 167 wells were classified and the log facies template was established. Combined with the characteristics of lithofacies and logging curves, eight sedimentary microfacies were divided. Finally, the distribution characteristics of four lithofacies assemblages in the sedimentary model were summarized as follows: type A is distributed in the braided river delta plain in the north. Assemblage B is distributed in the transitional zone of the braided river delta plain and front edge in the north, and combination type C is distributed in the channel development area of the braided river delta front in the south. The assemblage D is distributed in the deep lake region in the front of braided river delta in the southwest.
【作者单位】：中国地质大学(北京)能源学院;
【基金】：国家重大科技专项“深煤层煤层气开发技术研究与装备研制”(编号:2011ZX05042-001-002)资助
【分类号】：P618.13
【正文快照】： 0引言辫状河三角洲的沉积环境一般远离断裂带,基底沉降稳定,水浅、坡缓。砂泥岩垂向频繁间互,横向指状交互,具备岩性油气藏的成藏条件,砂体储集性和含油气性均好[1-7]。截至2014年,鄂尔多斯盆地苏里格地区天然气探明储量为4.23万亿m3,苏里格南部地区天然气总资源量为1.5万亿m3

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