苏里格气田有效储层解析与水平井长度优化

发布时间：2018-06-15 04:12

本文选题：鄂尔多斯盆地 + 苏里格气田　；参考：《天然气工业》2016年03期

【摘要】：水平井凭借其独有的技术和经济优势,已成为高效开发致密气藏的关键技术,但是其在非层状气藏的开发中却效果较差。为此,针对鄂尔多斯盆地苏里格气田二叠系下石盒子组8段含气砂体孤立分散的分布特点,采用露头类比、地质统计、密井网先导试验3种方法研究了该气田含气砂体的展布方向及规模特征,结合密集井网区精细地质解剖成果,提出了4种适用于该气田盒8段部署水平井的含气砂体分布样式:①厚层块状孤立型;②具物性夹层的垂向叠置型;③具泥质夹层的垂向叠置型;④横向串糖葫芦型。统计当前已实施水平井钻遇含气砂体的情况,发现所钻遇的含气砂体长度多数分布在670~1300 m。以苏X区SuX-18-36典型井组的物性夹层垂向叠置型砂体为例,结合生产数据修正法、数值模拟法及经济评价法,优化了气田合理水平段长度,认为在当前经济技术条件下,1200 m以内的水平段长度适合于该气田的该类叠置样式的砂体。该成果为该气田的后续高效开发提供了技术支撑。
[Abstract]:Due to its unique technical and economic advantages, horizontal well has become the key technology in the development of dense gas reservoir, but its effect is poor in the development of non-stratified gas reservoir. Therefore, in view of the isolated distribution of gas-bearing sand bodies in Lower Shihezi formation of Lower Shihezi formation of Lower Permian in Sulige Gas Field, Ordos Basin, outcrop analogy and geological statistics are used. The distribution direction and scale characteristics of gas-bearing sand bodies in this gas field are studied by three methods of dense well pattern pilot test, and combined with the fine geological anatomy results of dense well pattern area. In this paper, four types of gas-bearing sand bodies suitable for horizontal well deployment in the box 8 section of the gas field are presented. The distribution pattern of gas-bearing sand bodies is: 1 thick layer block isolated type 2 vertical superimposed type / 3 muddy intercalation type / 3 vertical superimposed type Li 4 transverse string Tomatoes on sticks type. According to the statistics of the gas bearing sand body in horizontal well drilling, it is found that the length of the gas bearing sand body is in 670 ~ 1 300 m. Taking the physical interlayer vertical superimposed sand body of SuX-18-36 typical well group in SuX district as an example, combining with production data correction method, numerical simulation method and economic evaluation method, the reasonable horizontal section length of gas field is optimized. It is considered that the horizontal section length within 1200m is suitable for this type of superimposed sand body in the gas field under the current economic and technological conditions. This result provides technical support for the subsequent high-efficiency development of the gas field.
【作者单位】：中国石油勘探开发研究院;油气资源与勘探技术教育部重点实验室·长江大学;长江大学地球科学学院;
【基金】：国家科技重大专项“天然气开发关键技术”(编号:2011ZX05015)
【分类号】：TE37

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