386 Vol. 38 No.4 图 1 川中地区须家河组气藏分布图 [4] m 3 /km ~ m 3 /km [1] [4] 2.1 构造对天然气富集成藏的控制 10.0% ~ 11.8% ~ 0.90

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1 PETROLEUM EXPLORATION AND DEVELOPMENT Vol.38 No 文章编号 : (2011) 四川盆地须家河组须一三和五段天然气源内成藏潜力与有利区评价赵文智 1, 卞从胜 2, 徐春春 3, 王红军 2, 王铜山 2, 施振生 2 (1. 中国石油勘探与生产公司 ;2. 中国石油勘探开发研究院 ;3. 中国石油西南油气田公司 ) 基金项目 : 国家重点基础研究发展计划 (973) 项目 (2007CB209504) 摘要 : 目前四川盆地须家河组天然气藏勘探和发现主要集中于须二四六段, 气藏总体表现出充满度不高低部位含水饱和度偏高储量动用比例偏低储集层含气范围有限的特点, 须一三五段则被作为烃源岩在对须一三五段进行成藏条件研究和已知出气点解剖分析的基础上, 提出川西北川西南和川中部分地区须一三五段发育规模较大的砂体, 各段有利含气面积约 5 000~ km 2, 储集层连续性较好, 单层延伸长度达 15~20 km, 具备源内成藏的有利条件, 可形成岩性或构造 - 岩性圈闭气藏, 比须二四六段的成藏潜力和丰度更好, 经勘探可形成工业规模的天然气储量, 今后应该加强上述地区须一三五段源内天然气成藏研究与勘探力度, 尤其是须三和须五段图 8 表 4 参 19 关键词 : 源内成藏 ; 有利地区 ; 须家河组 ; 四川盆地中图分类号 :TE122.1 文献标识码 :A Assessment on gas accumulation potential and favorable plays within the Xu-1, 3 and 5 Members of Xujiahe Formation in Sichuan Basin Zhao Wenzhi 1, Bian Congsheng 2, Xu Chunchun 3, Wang Hongjun 2, Wang Tongshan 2, Shi Zhensheng 2 (1. PetroChina Exploration & Production Company, Beijing , China; 2. PetroChina Research Institute of Petroleum Exploration & Development, Beijing , China; 3. PetroChina Southwest Oil and Gas Field Company, Chengdu , China) Abstract: Natural gas exploration and discovery of the Xujiahe Formation in the Sichuan Basin are mainly concentrated in the Xu-2, 4 and 6 Members. The discovered gas reservoirs are characterized by low degree of fullness, high water saturation in lower positions, low level of produced reserves, and limited gas bearing range of reservoirs. The Xu-1, 3 and 5 Members are identified as source rocks. Based on the study of natural gas accumulation conditions and several gas-productive wells in the Xu-1, 3 and 5, this paper proposes that large scale sand bodies are developed in the Xu-1, 3 and 5 Members in the northwest, southwest and central parts of the Sichuan Basin. In each member, the favorable gas bearing area is about km 2, reservoir rocks have good continuity with single layer extension up to km. It is believed that these sand bodies have favorable conditions for gas accumulation within source kitchens to form lithologic or structural-lithologic gas reservoirs, and have better accumulation potential and higher gas-bearing abundance than that of the Xu-2, 4 and 6 Members. The exploration practice revealed that economic gas reserves may be generated. It is suggested that more efforts be made to study the gas accumulation conditions in the Xu-1, 3 and 5 Members (especially the Xu-3 and Xu-5 Members) and more exploration work be fulfilled in these strata. Key words: accumulation inside source; favorable play; Xujiahe Formation; Sichuan Basin m m m %~65% 40% ~ m 3 /km 2 [1-3]

386 Vol. 38 No.4 图 1 川中地区须家河组气藏分布图 [4] 20 10 8 m 3 /km 2 5 10 8 ~10 10 8 m 3 /km 2 2 2006 973 [1] [4] 2.

2 386 Vol. 38 No.4 图 1 川中地区须家河组气藏分布图 [4] m 3 /km ~ m 3 /km [1] [4] 2.1 构造对天然气富集成藏的控制 10.0% ~ 11.8% ~ μm % 2 55% 7.9% μm 2 50% 9.2% μm 2 60%~75%

3 [5-7] 10~30 m R o 1.1%~1.3% 1 30%~61% - 56%~ 61% - 30% m 3 /km m 3 /d m 3 /km m 3 /d 表 1 四川盆地川中地区须家河组气藏充满度统计 /% /% - 55~ ~ ~ ~ ~ 储集层含气范围 [4] 5 m 70% 20 m 10 m m 3 /km 2 3~5 m 2 3 [8-10] 30% 3.1 须一三和五段沉积相特征 20~50 m 3 [11-12] m 10~30 m 3a 40~60 m 20%~60% 40~80 km 80~100 km

388 Vol. 38 No.4 图 2 广安气田须六段和须四段气藏剖面图 GRR t 30% 1.0 10 4 km 2 30% 6 000 km 2 4 20~40 m 200 2 3b 20% 30% 3.

4 388 Vol. 38 No.4 图 2 广安气田须六段和须四段气藏剖面图 GRR t 30% km 2 30% km ~40 m b 20% 30% km 2 80~120 km 200 km 10~20 m 60~80 km 10~ 25 m 30% km 须一三和五段储集层发育特征 4.18% μm 2 3 8%~10% ~ μm 2

2011 8 389 图 3 须一和须三段内部典型砂泥岩组合结构图 GRΔt 表 3 须家河组须一三五段储集层物性统计 /% /10 3 μm 2 0.09 9.21 3.79 1.29 10 3 12.30 0.25 0.31 9.55 4.28 1.

24 图 4 四川盆地须家河组须三段沉积相图表 2 四川盆地须三段地层厚度及砂地比统计 /m /m /m /% 1 130 38.0 92.0 29 1 165 100.0 65.0 60 1 647 446.0 201.0 69 2 101 31.0 70.

5 图 3 须一和须三段内部典型砂泥岩组合结构图 GRΔt 表 3 须家河组须一三五段储集层物性统计 /% /10 3 μm 图 4 四川盆地须家河组须三段沉积相图表 2 四川盆地须三段地层厚度及砂地比统计 /m /m /m /% [13] 2.4% 3.9% - 5%~7% ~ μm 2 10~20 m 70%~90% 20~30 m 5 1 4~5 m 10% 6 15~30 m 5~10 m 2%~8% 60 4% 30 m 2%~6% ~ μm 2 1%~5%

6 390 Vol. 38 No.4 图 5 四川盆地须一段储集层分布剖面图 GRΔt 图 6 四川盆地须三段储集层分布剖面图 GRΔt 10 m 5%

2011 8 391 30 m 20 km 7 3%~7% 0.05 10 3 ~0.

7 m 20 km 7 3%~7% ~ μm 2 10 m 3%~10% 20~40 m 15 m 15 km 图 7 四川盆地须五段储集层分布剖面图 GRΔt 3.3 须一三和五段圈闭特征和成藏机制 m 3 /km ~ m 3 /km 2 [14-17] [4] 4 [18-19] 4.1 须一三和五段天然气重要发现 2009

392 Vol. 38 No.4 38 1 1 10 4 m 3 /d 1 9 10 4 m 3 /d 2 16 10 4 m 3 /d 9 40 10 4 m 3 /d 119 30 10 4 m 3 /d 17 2 10 4 m 3 /d 2%~3% 20% X 2 4.

8 392 Vol. 38 No m 3 /d m 3 /d m 3 /d m 3 /d m 3 /d m 3 /d 2%~3% 20% X 须一三和五段天然气资源潜力和有利地区 4 15% m 3 /km m m 3 /km km m ~ m 3 /km 2 Ⅱ km m 3 5% km m km m 3 6%~10% km m km m 3 8 表 4 须家河组须一三五段有利区评价参数表 /km 2 /m /% /% /10 8 m ~25 4.0~6.5 50~ ~ ~20 5.0~6.0 45~ ~ 图 8 四川盆地须五段有利勘探区综合评价图 m m

9 m 3 3 参考文献 : [1],,,. [J]., 2008, 35(6): Zhao Wenzhi, Wang Zecheng, Wang Hongjun, et al. Principal characteristics and forming conditions for medium-low abundance large scale oil/gas fields in China[J]. Petroleum Exploration and Development, 2008, 35(6): [2],,,. [J]., 2009, 36(1): Zhu Rukai, Zhao Xia, Liu Liuhong, et al. Depositional system and favorable reservoir distribution of Xujiahe Formation in Sichuan Basin[J]. Petroleum Exploration and Development, 2009, 36(1): [3],,,. : [J]., 2009, 36(3): Zou Caineng, Tao Shizhen, Zhu Rukai, et al. Formation and distribution of continuous gas reservoirs and their giant gas province: A case from the Upper Triassic Xujiahe Formation giant gas province, Sichuan Basin[J]. Petroleum Exploration and Development, 2009, 36(3): [4],,,. [J]., 2010, 37(2): Zhao Wenzhi, Wang Hongjun, Xu Chunchun, et al. Reservoirforming mechanism and enrichment conditions of the extensive Xujiahe Formation gas reservoirs, central Sichuan Basin[J]. Petroleum Exploration and Development, 2010, 37(2): [5],. [M]. :, Fu Jiamo, Liu Dehan. Migration, reservoir, and cap of natural gas[m]. Beijing: Science Press, [6]. [M]. :, Zhang Houfu. Petroleum geology[m]. Beijing: Petroleum Industry Press, [7]. [M].. :, Li Mingcheng. Oil and gas migration[m]. 3rd ed. Beijing: Petroleum Industry Press, [8]. : [M]. :, Zhai Guangming. Petroleum geology of China: Vol. 10[M]. Beijing: Petroleum Industry Press, [9],. [J]., 1996, 16(S1): 40-54, 107. Luo Qihou, Wang Shiqian. Research on gas enrichment conditions of important gas-bearing formations in the east and central of Sichuan basin[j]. Natural Gas Industry, 1996, 16(S1): 40-54, 107. [10],,,. [M]. :, Liu Deliang, Song Yan, Xue Aimin, et al. Integrated research on tectonic and gas accumulating plays of Sichuan basin[m]. Beijing: Petroleum Industry Press, [11],,,. [J]., 1982, 3(3): Deng Kangling, He Li, Qin Dayou, et al. Stratum and sedimentary environment of Early T 3 x in Sichuan basin[j]. Oil & Gas Geology, 1982, 3(3): [12],,,. [J]., 2007, 31(2): Liu Jinhua, Zhang Shiqi, Sun Yaoting, et al. Correlation and evolution of the upper Triassic Xujiahe formation in the west Sichuan foreland basin[j]. Journal of Stratigraphy, 2007, 31(2): [13],,,. [R]. :, Luo Qihou, Chen Shengji, Yang Jiaqi, et al. Enrichment law and resource evaluation of the upper Triassic coal-formed gas in Sichuan basin[m]. Chengdu: Research Institute of Exploration and Development, Southwest Oil and Gas Field Branch Company of CNPC, [14],,,. [J]., 2007, 28(2): Li Mingcheng, Shan Xiuqin, Ma Chenghua, et al. Dynamics of sand lens reservoir[j]. Oil & Gas Geology, 2007, 28(2): [15],,,. [J]., 2006, 80(3): Chen Dongxia, Pang Xiongqi, Jiang Zhenxue, et al. Hydrocarbon accumulation mechanism analysis of lithological reservoir by NMR modeling experiment[j]. Acta Geologica Sinica, 2006, 80(3): [16],,,. [J]., 2007, 34(3): Zhao Wenzhi, Zou Caineng, Gu Zhidong, et al. Preliminary discussion on accumulation mechanism of sand lens reservoirs[j]. Petroleum Exploration and Development, 2007, 34(3): [17]. [M]. :, Pang Xiongqi. Theory and application of hydrocarbon expulsion threshold controlling hydrocarbon[m]. Beijing: Petroleum Industry Press, [18],,,. : [J]., 2009, 36(3): Zhang Shuichang, Mi Jingkui, Liu Liuhong, et al. Geological features and formation of coal-formed tight sandstone gas pools in China: Cases from Upper Paleozoic gas pools, Ordos Basin and Xujiahe Formation gas pools, Sichuan Basin[J]. Petroleum Exploration and Development, 2009, 36(3): [19] 黄洁, 朱如凯, 侯读杰, 等. 沉积环境和层序地层对次生孔隙发育的影响 : 以川中地区须家河组碎屑岩储集层为例 [J]. 石油勘探与开发, 2010, 37(2): Huang Jie, Zhu Rukai, Hou Dujie, et al. Influences of depositional environment and sequence stratigraphy on secondary porosity development: A case of the Xujiahe Formation clastic reservoir in the central Sichuan Basin[J]. Petroleum Exploration and Development, 2010, 37(2): 第一作者简介 : 赵文智 (1958-), 男, 河北昌黎人, 中国石油勘探与生产公司教授级高级工程师, 博士生导师, 获李四光地质科学奖并获多项国家科技进步一二等奖, 长期从事石油地质综合研究, 现在中国石油勘探与生产公司从事科技与信息管理工作地址 : 北京市东城区东直门北大街 9 号, 中国石油勘探与生产公司, 邮政编码 : zwz@petrochina.com.cn 收稿日期 : 修回日期 : 王大锐黄昌武刘方方

( 1) ; 6 5 [ 3 ] S1 S2 1 Fig. 1 Seismic sequence prof ile framework of Wuliyasitai Sag S1 () ( 2) S2 ( ) Ο 2 S1 Fig. 2 Sedimentary fa

( 1) ; 6 5 [ 3 ] S1 S2 1 Fig. 1 Seismic sequence prof ile framework of Wuliyasitai Sag S1 () ( 2) S2 ( ) Ο 2 S1 Fig. 2 Sedimentary fa 27 3 2006 5 ACTA PETROL EI SIN ICA Vol. 27 No. 3 May 2006 : 0253Ο2697 (2006) 03Ο0027Ο05 1 2 2 2 (11 610059 ; 21 062552) : 2 ; : ; ;; ;; : TE1111 3 : A Forming pattern and distribution features of hydrocarbon