鄂尔多斯盆地苏里格气田辫状河体系带特征

doi:10.11743/ogg20160207

摘要/Abstract

摘要： 鄂尔多斯盆地苏里格气田上古生界气藏石盒子组8段、山西组1段主体为河流相沉积，河道多期切割、叠置，形成了规模较大的“辫状河体系”。根据沉积条件和沉积特征的差异，可分为叠置带、过渡带和体系间3个辫状河体系带。研究深化并发展了辫状河体系带的概念及沉积内涵，建立了沉积相-辫状河体系-辫状河体系带的多级沉积格架，提出了辫状河体系带的多参数定量划分标准。综合分析岩心、测井、钻井等资料，认识到辫状河体系带对沉积微相展布和规模、砂体的叠置样式、有效砂体的类型和集中程度具有较强的控制作用，是控制气田沉积、储层的关键地质因素。叠置带心滩发育频率高，规模大，砂体多期叠置，有效砂体富集，是气田开发的主力相带单元，过渡带河道充填发育，有效砂体以孤立型分布为主，辫状河体系间砂体零星发育，开发潜力较差。分别针对叠置带、过渡带建立了水平井地质目标优选标准，优化了井轨迹，为水平井随钻地质导向提供了更可靠的地质依据。

关键词: 有效砂体, 沉积微相, 辫状河体系, 致密砂岩气, 苏里格气田, 鄂尔多斯盆地

Abstract: The 8^th Member of the Shihezi Formation and the 1^st Member of the Shanxi Formation of the Upper Paleozoic in Sulige gasfield are mainly of fluvial facies, and the crosscutting and superimposition of multiple-stage channels resulted in a large "braided river system" in geologic history.According to different sedimentary environments and sedimentation characteristics, the braided river system can be divided into superimposed zone, transitional zone and inter-channel zone.This study deepens and develops the concept and deposit connotation of the braided river system, establishes a sedimentary hierarchy of sedimentary facies-braided river system-braided river system zone, and proposes multiple-parameter quantitative classification standards for Sulige's braided river system.Through integrated analysis of core, logging and drilling data, it is concluded that braided river system zone is the key geological factor for sedimentation and reservoir characteristics of Sulige gasfield, as it strongly controls the sedimentary microfacies distribution and scale, sand bodies' superimposition style and effective sand bodies' type and centralization.The superimposed zones of the braided river system feature in highly develo-ped and large channel bars, superimposition of multiple stage sand bodies and clustering of effective sand bodies, thus is the favorable facies zone for gas production.In transitional zone, channel filling is more developed and effective sand bodies are mainly distributed in isolation in space.In contrast, the inter-channel zone is characterized by scattered and sparse sand bodies, thus its exploitation potential is poor.In addition, the criteria of geological target selection for horizontal wells are set up for the superimposed zone and transitional zone of braided river system respectively, and horizontal well trajectory is optimized, providing a more reliable basis for geo-steering while drilling of horizontal wells.

Key words: effective sand body, sedimentary microfacies, braided river sedimentary system, tight sand gas, Sulige gasfield, Ordos Basin

中图分类号:

TE122.2

郭智,贾爱林,何东博,等. 鄂尔多斯盆地苏里格气田辫状河体系带特征[J]. 石油与天然气地质, 2016, 37(2): 197-204. doi: 10.11743/ogg20160207 Guo Zhi,Jia Ailin,He Dongbo,et al. Characteristics of braided river sedimentary system zones in Sulige gasfield, Ordos Basin[J]. Oil & Gas Geology, 2016, 37(2): 197-204. doi: 10.11743/ogg20160207

参考文献

[1] 何自新,付金华,席胜利,等.苏里格大气田成藏地质特征[J].石油学报,2003,24(2):6-12. He Zixin,Fu Jinhua,Xi Shengli,et al.Geological features of reservoir formation of Sulige gas field[J].Acta Petrolei Sinica,2003,24(2):6-12.
[2] 何东博,贾爱林,田昌炳,等.苏里格气田储集层成岩作用及有效储集层成因[J].石油勘探与开发,2004,31(3):69-71. He Dongbo,Jia Ailin,Tian Changbing,et al.Diagenesis and genesis of effective sandstone reservoirs in the Sulige gas field[J].Petroleum Exploration and development,2004,31(3):69-71.
[3] 李会军,吴泰然,马宗晋,等.苏里格气田优质储层的控制因素[J].天然气工业,2004,24(8):12-13. Li Huijun,WuTairan,Ma Zongjin,et al.Research on the basic chara-cteristics and control factors of high-quality reservoir in Sulige gas field[J].Natural Gas Industry,2004,24(8):12-13.
[4] 罗东明,陈舒薇,张广权.大牛地气田上古生界沉积相与天然气富集规律的再认识[J].石油与天然气地质,2011,32(3):368-374. Luo Dongming,Chen Shuwei,Zhang Guangquan.New understandings of the Upper Paleozoic sedimentary facie sand Gas accumulation patterns in Daniudi gasfield[J].Oil & Gas Geology,2011,32(3):368-374.
[5] 姜在兴.沉积学[M].北京:石油工业出版社,2003,283. Jiang Zaixing.Sedimetology[M].Beijing:Petroleum Industry Press,2003,283.
[6] 何东博,贾爱林,冀光,等.苏里格大型致密砂岩气田开发井型井网技术[J].石油勘探与开发,2013,40(1):79-89. He Dongbo,Jia Ailin,Ji Guang,et al.Well type and pattern optimization technology for large scale tight sand gas,Sulige gas field[J].Petroleum Exploration and development,2013,40(1):79-89.
[7] 文华国,郑荣才,高红灿,等.苏里格气田苏6井区下石盒子组盒8段沉积相特征[J].沉积学报,2007,25(1):90-98. Weng Huaguo,Zheng rongcai,Cao Hongcan,et al.Sedimentary facies of the 8th member of the lower Shihezi formation in Su6 area,Sulige gas field.
[8] Jia A.The Development strategies for gas fields of low permeability,low abundance and in heterogeneity[C]//International Oil & Gas Conference and Exhibition in China.Beijing:Society of Petroleum Engineers,2006.
[9] 孙龙德,方朝亮,李峰,等.中国沉积盆地油气勘探开发实践与沉积学研究进展[J].石油勘探与开发,2010,37(4):385-396. Sun Longde,Fang Chaoliang,Li Feng,et al.Petroleum exploration and development practices of sedimentary basins in China and research progress of sedimentology[J].Petroleum Exploration and development,2010,37(4):385-396.
[10] 贾爱林,何东博,何文祥,等.应用露头知识库进行油田井间储层预测[J].石油学报,2003,21(6):51-53. Jia Ailin,He Dongbo,He Wenxiang,et al.Application of ourcrop geolotical knowledge database to predication of inter-well reservoir in oilfield[J].Acta Petrolei Sinica,2003,21(6):51-53.
[11] 贾爱林.中国储层地质模型20年[J].石油学报,2011,32(1):181-188. Jia Ailin.Research achievements on reservoir geological modeling of China in the past two decades[J].Acta Petrolei Sinica,2011,32(1):181-188.
[12] 李志鹏,林承焰,董波,等.河控三角洲水下分流河道砂体内部建筑结构模式[J].石油学报,2012,33(1):101-105. Li Zhipeng,Lin Chengyan,Dong bo,et al.An internal structure model of subaqueous distributary channel sands of the fluvial-dominated delta[J].Acta Petrolei Sinica,2012,33(1):101-105.
[13] Matheron G,Beucher H,de Fouquet C,et al.Conditional simulation of the geometry of fluvio-deltaic reservoirs[C]//SPE Annual Technical Conference and Exhibition,Dallas,Texas,1987.
[14] Strebelle S B,Journel A G.Reservoir modeling using multiple-point statistics[C]//SPE Annual Technical Conference and Exhibition,New Orleans,Louisiana,2001.
[15] 田景春,张兴良,王峰,等.鄂尔多斯盆地高桥地区上古生界储集砂体叠置关系及分布定量刻画[J].石油与天然气地质,2013,34(6):737-742. Tian Jingchun,Zhang Xingliang,Wang Feng,et al.Quantitative characterization of superimposition relationship and distribution of reservoir sandbodies in the Upper Palaeozoic of Gaoqiao region,the Ordos Basin[J].Oil & Gas Geology,2013,34(6):737-742.
[16] 卢涛,张吉,李跃刚,等.苏里格气田致密砂岩气藏水平井开发技术及展望[J].天然气工业,2013,33(8):38-43. Lu tao,Zhang Ji,Li Yuegang,et al.Horizontal well development technology for tight sandstone gas reservoirs in the Sulige gas field,Ordos basin[J].Natural Gas Industry,2013,33(8):38-43.
[17] 许杰,董宁,朱成宏,等.致密砂岩地震预测在水平井井轨迹设计中的应用[J].石油与天然气地质,2012,33(6):909-913. Xu Jie,Dong Ning,Zhu Chenghong,et al.Application of seismic data to the design of horizontal well trajectory in tight sandstone gas reservoirs[J].Oil & Gas Geology,2012,33(6):909-913.