新疆石油地质

›› 2017, Vol. 38 ›› Issue (1): 1-1.doi: 10.7657/XJPG20170109

• 论文 •    

苏36-11提高采收率试验区辫状河储集层构型单元定量表征

赵忠军，李进步，马志欣，吴小宁，付斌，王文胜   

  1. (中国石油 a.长庆油田分公司 苏里格气田研究中心;b.低渗透油气田勘探开发国家工程实验室,西安 710018)
  • 出版日期:2019-01-01 发布日期:1905-07-13

Quantitative Characterization of Architecture Units for Braided River Reservoir in Su36-11 EOR Test Area

ZHAO Zhongjun, LI Jinbu, MA Zhixin, WU Xiaoning, FU Bin, WANG Wensheng   

  1. (PetroChina a.Research Center of Sulige Gas Field, Changqing Oilfield Company; b.National Engineering Laboratory for Exploration and Development of Low-Permeability Oil & Gas Fields, Xi’an, Shaanxi 710018, China)
  • Online:2019-01-01 Published:1905-07-13

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摘要： 辫状河心滩和辫状水道是重要的油气储集砂体，砂体横向变化快，连续性和连通性差，储集层非均质性强，不同地区、不同类型辫状河发育规模差异明显，严重制约了辫状河储集层的精细开发。以储集层构型理论为指导，对苏里格气田苏36-11提高采收率试验区盒8下亚段辫状河储集层构型单元进行了定量表征，并对有效砂体分布规律进行了分析。研究结果表明：研究区单一辫状水道宽度100~550 m，复合（单一）心滩长度和宽度分别为1 350~4 300 m和480~1 950 m. 最后，基于微相单元发育规模和分布规律，结合试气、试采等生产动态的有效砂体综合评价表明：H8x1-3和H8x2-3单层心滩和辫状水道连片分布，有效砂体钻遇率高，是最有利的目标层位，心滩和辫状水道砂体均是有利的储集砂体；H8x1-2和H8x2-2单层心滩有效砂体钻遇率高，孤岛状的心滩是较为有利的储集砂体；H8x1-1和H8x2-1单层有效砂体综合钻遇率低，仅少量心滩可能含气，开发风险最高。

Abstract: Braided channel bar and braided channel are important oil and gas reservoir sandbodies, which are characterized by rapid lateral variation, poor continuity and connectivity, strong reservoir heterogeneity and obvious differences of sandbody scale among different areas and different types. These features seriously constrain the development of the braided river reservoir. Based on the reservoir architecture theory, the paper quantitatively characterizes the architecture units of the braided river reservoir of the lower He-8 section (i.e. H8x) in Su36-11 EOR test area of Sulige gas field and analyzes the effective sandbody distribution. The result show that the width of a single braided channel ranges from 100 to 550 m, and the length and width of braided bars are 1 350~4 300 m and 480~1 950 m, respectively. Finally, based on the development scale and distribution of sedimentary microfacies units and combined with production performance data, the comprehensive evaluation of effective sandbodies indicates that channel bars and braided channels are distributed continuously in H8x1-3 and H8x2-3 so that they are considered as the most favorable areas and target horizons with high drilling rate of effective sandbodies. The channel bars in H8x1-2 and H8x2-2 have high effective sandbody drilling rate and island-like channel bars are favorable reservoir sandbodies. Gas may be discovered in only a few channel bars in H8x1-2 and H8x2-2 so that the risks to develop the 2 horizons will be the highest

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