用核磁共振和高压压汞定量评价储层孔隙连通性——以沾化凹陷沙三下亚段为例

发布时间：2018-01-10 02:05

本文关键词：用核磁共振和高压压汞定量评价储层孔隙连通性——以沾化凹陷沙三下亚段为例　出处：《中国矿业大学学报》2017年03期 　论文类型：期刊论文

【摘要】：孔隙连通性是致密储层有效性评价的关键.为了定量评价致密储层孔隙连通性,文中分析了核磁共振和高压压汞所反映的孔隙空间的差异,以核磁共振和高压压汞数据为基础,提出了一种用于评价致密储层孔隙连通性的方法,并用自发渗吸实验验证了其正确性,选取沾化凹陷沙三下亚段典型泥页岩样品为例,对其进行了实例分析.研究结果表明:沾化凹陷沙三下亚段泥页岩孔径分布呈三段式.0~50nm孔体积占总孔隙体积比例平均为66.2%,是泥页岩主要的储集空间;50nm~2μm和大于2μm分别为16.6%和17.2%,二者发育情况相当,是重要的储集空间及运移通道.孔隙连通受控于孔隙尺度及层理发育情况.孔隙尺度越大,其连接到运移通道的概率就越大,孔隙连通性越好;层理的发育一方面提高了大孔隙孔体积;另一方面改善了不同尺度孔隙的连通性.
[Abstract]:The pore connectivity layer is the key to evaluate the effectiveness of the tight reservoir. In order to quantitatively evaluate the reservoir pore connectivity, this paper analyzes the difference between the pore space of nuclear magnetic resonance and high pressure mercury reflected, with nuclear magnetic resonance and mercury penetration data, a method is presented for evaluating reservoir pore connectivity the methods and imbibition experiments verify the correctness of the selected sub member of Shahejie Formation in the Zhanhua sag of three typical shale samples as an example, has carried on the example analysis. The results show that: three the sub member of Shahejie Formation in the Zhanhua sag of the shale pore size distribution in three segment.0~50nm pore volume total pore volume the average ratio of 66.2%, is the main reservoir space of shale; 50nm~2 m and more than 2 m were 16.6% and 17.2%, two growth, is set and the migration path important reservoir. The pores are controlled by pore scale and physical layer development The greater the pore size, the greater the probability of connecting to the migration channel. The better the connectivity of pores is. The development of bedding improves the volume of large pore volume on the one hand, and on the other hand improves the connectivity of different scale pores.

【作者单位】：中国石油大学(北京)油气资源与工程国家重点实验室;中国石油大学(北京)非常规天然气研究院;中国石化胜利油田分公司地质科学研究院;
【基金】：国家重点基础研究发展计划(973)项目(2014CB239105) 国家自然科学基金项目(41502125)
【分类号】：TE122
【正文快照】： 3.中国石化胜利油田分公司地质科学研究院,山东东营257051)储层孔隙是油气的存储空间,其中连通部分更是为油气的运移提供通道,进而控制着油气的产出行为.所以,孔隙连通性的定量评价对有效资源评价、渗流能力计算、目标层位优选都具有重要的科学意义[1-3].常规储层孔隙连通性可

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