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1 PETROLEUM EXPLORATION AND DEVELOPMENT Vol.43 No 文章编号 : (2016) DOI: /PED 四川盆地中部地区侏罗系致密油研究新进展杨跃明 1, 杨家静 1, 杨光 1, 陶士振 2, 倪超 3, 张斌 2, 何晓东林建平 4, 黄东 1, 刘敏 1 1, 邹娟 (1. 中国石油西南油气田公司勘探开发研究院 ;2. 中国石油勘探开发研究院 ;3. 中国石油杭州地质研究院 ;4. 中国石油西南油气田川中油气矿 ) 基金项目 : 中国石油天然气集团公司重大专项四川盆地侏罗系石油勘探开发关键技术研究 (2012E-2601) 摘要 : 针对四川盆地中部地区侏罗系致密油资源潜力储集层类型油藏类型以及增产改造工艺技术开展攻关研究通过致密油资源评价方法估算侏罗系 5 套油层石油资源量达 t, 表明侏罗系石油资源潜力大通过岩心描述薄片观察试井试采等静态动态资料综合分析认为, 侏罗系主要为特低孔特低渗的裂缝 - 孔隙型储集层, 而不是传统认为的单一裂缝型储集层 ; 油藏类型主要为近源充注连续型分布的致密油 ; 优质烃源岩物性较好的储集层和裂缝是致密油富集的主控因素沙一段砂岩大安寨段介壳灰岩储集层现场试验表明, 水平井体积压裂和水平井压裂酸化具有较好的增产改造效果图 16 表 2 参 26 关键词 : 四川盆地中部 ; 侏罗系 ; 致密油 ; 资源潜力 ; 致密储集层 ; 富集规律 ; 增产改造中图分类号 :TE122.2 文献标识码 :A New research progress of Jurassic tight oil in central Sichuan Basin YANG Yueming 1, YANG Jiajing 1, YANG Guang 1, TAO Shizhen 2, NI Chao 3, ZHANG Bin 2, HE Xiaodong 1, LIN Jianping 4, HUANG Dong 1, LIU Min 1, ZOU Juan 1 (1. Institute of Exploration and Development, PetroChina Southwest Oil and Gas Field Company, Chengdu , China; 2. PetroChina Research Institute of Petroleum Exploration & Development, Beijing , China; 3. PetroChina Hangzhou Research Institute of Geology, Hangzhou , China; 4. Central Sichuan Oil-Gas District, PetroChina Southwest Oil and Gas Field Company, Suining , China) Abstract: The resource potential, fractured reservoir, reservoir type and stimulation technology of Jurassic tight oil in central Sichuan basin were investigated. Based on the evaluation method of tight oil resource, the amount of oil resources of the five Jurassic layers were estimated at 1.6 billion tons, showing that the Jurassic oil resource potential in central Sichuan Basin is huge. Integrated analysis of static and dynamic data including core-description, thin section examination, well test and exploration show Jurassic reservoirs are fracture-pore reservoir with ultra-low porosity, super-low permeability, rather than single fractured reservoir believed before. Jurassic reservoirs are tight oil reservoir with the characteristics of near source charge and continuous distribution. The high-quality hydrocarbon source, reservoir with better physical properties and fracture are the main factors controlling tight oil enrichment. Horizontal well + volume fracturing of Shayi Member tight sandstone reservoir and the horizontal well + fracture acidizing for the Da anzhai Member shell limestone reservoir have achieved good stimulation effect. Key words: Central Sichuan Basin; Jurassic; tight oil; resource potential; tight reservoir; enrichment rule; reservoir stimulation 1, 1 [1] 1 凉凉 t t 2005

874 Vol. 43 No.6 60 m 3 [2-4] 凉 100 m 4 4 1.28%~1.43% [5] [6] Ⅱ R o 0.9%~ 1.

2 874 Vol. 43 No.6 60 m 3 [2-4] 凉 100 m %~1.43% [5] [6] Ⅱ R o 0.9%~ 1.5% 20 m 2 6~ t/km 2[5] 2013 [7-8] t [8] 凉 4 3 凉凉 t 图 1 川中矿区位置图 3 凉 [9] 储集空间类型 2% [10-11]

3 图 2 川中地区侏罗系油层综合柱状图图 3 侏罗系自流井组大安寨段烃源岩厚度分布图图 4 侏罗系凉高山组烃源岩厚度分布图

876 Vol. 43 No.6 3 [12] 5 5a 5d M030-H31 5a 5.43% 表 1 国内外典型致密油储集岩物性特征对比表 /m /% /10 3 μm 2 Williston Bakken 5~15 8.00~12.00 0.100~1.000 Western Gulf Eagle Ford 15~60 2.10~11.90 0.004~0.100 6 5~40 8.

4 876 Vol. 43 No.6 3 [12] 5 5a 5d M030-H31 5a 5.43% 表 1 国内外典型致密油储集岩物性特征对比表 /m /% /10 3 μm 2 Williston Bakken 5~ ~ ~1.000 Western Gulf Eagle Ford 15~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 凉 3~ ~ ~ ~ a M030-H ~ m b M030-H m 5.43% m 2 c PL md PL m e X m f LC m g M030-H m h W m i X m 0.52% j G m 3.03% k G4 l J72 m n PL ~ m o M030-H m p J72 图 5 川中地区侏罗系大安寨段介壳灰岩储集空间类型露头岩心及薄片鉴定照片

渗透率关系图 N 6 [17] [4,14-15] - - - 3 2 7 2-7a [16] - 5 000 t 84%

5 e 5h 5i 5l 5m 5p [13] 3.2 侏罗系裂缝 - 孔隙型储集层对单井产能的影响凉图 6 川中地区侏罗系 3 套主力油层孔隙度 - 渗透率关系图 N 6 [17] [4,14-15] a [16] t 84% [9] 致密储集层孔喉结构对生产动态的影响 %~ 6.8% μm 85% 0.4 μm 15% 44.23% 图 7 大安寨段介壳灰岩储集层试采特征曲线

878 Vol. 43 No.6 图 8 大安寨段介壳灰岩孔喉结构分布及其对渗透率贡献率直方图表 2 川中地区侏罗系与鄂尔多斯盆地延长组致密储集层岩样参数对比表 / m / m / m / cm 3 6 10 151.2 0.19 0.24 894 1 172 5 147.9 1.15 3.22 152 367 8 145.2 0.89 2.

6 878 Vol. 43 No.6 图 8 大安寨段介壳灰岩孔喉结构分布及其对渗透率贡献率直方图表 2 川中地区侏罗系与鄂尔多斯盆地延长组致密储集层岩样参数对比表 / m / m / m / cm o 5p [17] Schmoker [18] 9 [4] 10 [19] [20] 5 凉 3 [10-11,13,15-16] 图 9 岩心渗透率与最大喉道半径关系图 4.2 侏罗系致密油富集规律侏罗系致密油成藏特点凉 [5] 凉 1% 凉 20 m 1.2% t/km 2 [5] 12

7 % 14% 14 图 10 侏罗系大安寨段优质烃源岩分布图 10 m % 13 图 11 侏罗系凉高山组优质烃源岩分布图图 12 四川盆地侏罗系大安寨段介壳灰岩分布图

8 880 Vol. 43 No.6 图 13 侏罗系大安寨段物性与油井累计产量关系图 % Ⅰ 0.03%~0.08% Ⅱ Ⅰ [21-22] 图 14 侏罗系致密油孔缝复合输导模式图 1 凉凉 [13,23-24] 图 15 公山庙油田大安寨段油井累计产量与裂缝孔隙度关系图

2016 12 881 [13] [25-26] [24] 5 2 G117H 1 000 m 10 16 5 540 10 4 m 3 22.9 t 2013 3 2015 10 7 416 t GQ1H - 4 + + 539.58 m 3 339 m 63.

9 [13] [25-26] [24] 5 2 G117H m m t t GQ1H m m 63.5 m m 3 图 16 G117H 井体积压裂分段剖面图 6 Chinese Journal of Geology, 2011, 46(3): t - 参考文献 : [1],,,. [J]., 2011, 46(3): HE Dengfa, LI Desheng, ZHANG Guowei, et al. Formation and evolution of multi-cycle superposed Sichuan Basin, China[J]. [2]. [J]., 2004, 24(4): WANG Jinqi. Discussion on prospecting for oil in Sichuan Basin[J]. Natural Gas Industry, 2004, 24(4): [3]. [J]., 2010, 29(1): WANG Yujun. Feasibility analysis of discovering large oilfield in Sichuan Basin[J]. Oil Forum, 2010, 29(1): [4],,,. [J]., 2011, 32(1): LIANG Digang, RAN Longhui, DAI Danshen, et al. A re-recognition of the prospecting potential of Jurassic large-area and nonconventional oils in the Central-Northern Sichuan Basin[J]. Acta Petrolei Sinica, 2011, 32(1): [5],,,. : [J]., 2015, 34(1):

10 882 Vol. 43 No.6 ZHANG Bin, HU Jian, YANG Jiajing, et al. Controlling effect of source rocks on the occurrence of tight oil: Taking the Da anzhai reservoir of Sichuan Basin as an example[j]. Bulletin of Mineralogy, DENG Kangling. Geological conditions of Da anzhai oil & gas reservoir forming in Ziliujing group of Bai Ya-Shi Long Chang region in Sichuan Basin[J]. Petroleum Geology and Recovery Efficiency, 2001, 8(2): Petrology and Geochemistry, 2015, 34(1): [17],,,. [6],. : SY/T [S]. :, HUANG Fei, XIN Mao an. Geochemical analysis for hydrocarbon source rocks of continental facies: SY/T [S]. Beijing: Petroleum Industry Press, [J]., 2015, 38(1): HE Xiaodong, AN Feifei, LUO Yu, et al. The mesoscopic pore and fracture reservoir body of Jurassic tight oil in Sichuan Basin[J]. Natural Gas Exploration & Development, 2015, 38(1): [18] SCHMOKER J W. U.S. Geological survey assessment concepts for [7],,,. [J]. continuous petroleum accumulations[r]. 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KJWJ01 Fig. 1 Geological map of the Kajiwa landslide PDH01 60 ~ 70m 80 ~ 90m 80m 2 930m 556m 641m 598m m m 3 2 Ⅰ m 2

KJWJ01 Fig. 1 Geological map of the Kajiwa landslide PDH01 60 ~ 70m 80 ~ 90m 80m 2 930m 556m 641m 598m m m 3 2 Ⅰ m 2 Vol. 39 No. 1 Jan. 2012 HYDROGEOLOGY & ENGINEERING GEOLOGY 39 1 2012 1-621701 - - P642. 2 A 1000-3665 2012 01-0058-07 2 ~ 4 2 r 3 3 1 col + dl 500 ~ 1 050m Q 4 2 Q del 4 3 8 ~ 50 ~ 60m 10 r 4 1 2 1 2 2.