余浩杰,马志欣,张志刚,黄文芳
YU Haojie,MA Zhixin,ZHANG Zhigang,HUANG Wenfang

• 1:低渗透油气田勘探开发国家工程实验室
• 2:中国石油长庆油田分公司
• 3:中国石油长庆油田分公司勘探开发研究院

摘要(Abstract)：

苏里格气田主力含气层二叠系石盒子组盒8下亚段为典型的辫状河沉积体系,受限于没有可靠的统计规律,地质模型符合率较低。为获取可靠的地质规律,充分利用苏里格气田密井网区钻探资料,结合岩心精细观察、鄂尔多斯盆地周缘野外露头观测,以Miall储层构型分级方案为基础,建立适合苏里格气田辫状河的构型分级方案。在此基础上,开展储层构型解剖,并根据气田实际生产需求,应用数理统计方法建立了苏里格气田中部密井网储层地质知识库,并将该套储层地质知识库作为约束条件应用在水平井整体开发区三维地质建模中。结果表明:①苏里格气田SX区块盒8下亚段辫状河储层分为复合河道(5级)、单一河道(4级)和心滩(3级)3个构型单元级次,心滩砂体为主要成藏单元。②心滩砂体长度300～1 200 m,平均350 m,宽度150～600 m,平均280 m。③利用储层地质知识库约束三维地质模型,模型精度大幅提高,多个实现优化后的水平井有效储层钻遇率从40%提高至65%。该套方法对同类型砂岩储层地质研究具有推广价值。
Permian Shihezi-Formation Lower Submember-He8 in the main gas-bearing reservoir of Sulige Gas Field belongs to braided river sedimentary system, restricted to the unreliable statistical rules, the geological model coincidence rate is rather low. In order to obtain the reliable geology statistical rules, by making full use of the drilling data in the infill well-pattern block, integrated with the core fine observation and the field outcrop in the periphery of Erdos Basin, based on the stepped programme of Miall reservoir architecture, the architecture stepped programme was established for the braided river of Sulige Gas Field. On the basis of the above, the reservoir architecture anatomization was carried out, and moreover according to the actual demand of the gas field, the geological knowledge base of the braided-river reservoir in the middle fine well pattern of Sulige Gas Field was established with the help of the mathematical statistics, and furthermore as the constraining condition, the database was used in the three-dimensional geological modeling of horizontal-well integral development zone. The results show that the braided river reservoir in Sub-member He8 of Block SX in Sulige Gas Field consists of the following 3 architecture units: compound channel(Level 5), single channel(Level 4) and channel bar(Level 3), among which the channel bar is the main hydrocarbon accumulation unit; The channel bar sandbody is 300-1 200 m long and 150-600 m wide, the average length is 350 m, the average width is 280 m; The reservoir geological knowledge base was used to constrain the three-dimensional geological model, the accuracy of the model is greatly improved, the effective reservoir drilled rates of several optimized horizontal wells are increased from 40% to 65%. This set of the method is of generalized value to the geological study of the same type of sandstone reservoir.

关键词(KeyWords)： 密井网;储层构型;辫状河;心滩;辫流河道;储层地质知识库;苏里格气田
dense well pattern;reservoir architecture;braided river;channel bar;braided channel;reservoir geological knowledge database;Sulige Gas Field

Abstract:

Keywords:

基金项目(Foundation): 国家科技重大专项“鄂尔多斯盆地大型低渗透岩性地层油气藏开发示范工程”(2016ZX05050);; 中国石油天然气股份公司科技专项“长庆气田稳产及提高采收率技术研究”(2016E-0509)

作者(Author): 余浩杰,马志欣,张志刚,黄文芳
YU Haojie,MA Zhixin,ZHANG Zhigang,HUANG Wenfang

DOI: 10.19597/j.issn.1000-3754.201902022

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