This paper analyzes the sequence stratigraphy feature, lithology facies distribution, reservoir features and the distribution and control factors of the 3rd member of Xujiahe formation in Yuanba area, on the basis of the theory of high resolution sequence stratigraphy and core observation results. The target zone has been divided into one long sequence and five short sequences, corresponding to five sand groups. The experimental analysis of cores reveals that the reservoir belongs to low porosity and low permeability tight sandstone reservoir due to its poor physical properties, and this type of tight sandstone reservoir belongs to secondary tight reservoir because the efficient pores were formed during diagenesis procedure. Well test data confirm that the gas wells' productivities are very different and the upper three sand groups of the 3rd member of Xujiahe formation are relatively rich areas for natural gas. However, the distribution of gas in these three sand groups is still not uniform, which indicates that even in the same sand group, the gas performance varies dramatically from well to well. In order to find the reasonable explanation for this phenomenon, we conducted careful calibration between wells and logging curves to identify the reservoir features such as fissures and dissolution pores as well as analysis of influences of microfacies, lithologic belt, and sand body thickness. We draw a conclusion that favorable lithologic belt and sand body thickness are basic conditions for natural gas accumulation, and fissures combined with dissolution pores are key factors.
JIA Shuang
,
XIAO Kaihua
,
LI Hongtao
,
WEI Xiuping
. Formation, sedimentary characteristics and natural gas enrichment control factors in the 3rd member of Xujiahe formation in Yuanba area[J]. Science & Technology Review, 2016
, 34(2)
: 142
-146
.
DOI: 10.3981/j.issn.1000-7857.2016.2.022
[1] 黎静容, 李毓, 程洪亮, 等. 元坝地区须三段沉积特征[J]. 西安石油大学学报: 自然科学版, 2013, 28(5): 43-50.Li Jingrong, Li Yu, Cheng Hongliang, et al. Sedimentary characteristics of the third member of Xujiahe Formation in Yuanba area[J]. Journal of Xi'an Shiyou University: Natural Science Edition, 2013, 28(5): 43-50.
[2] 王威. 高能河道砂体特征及勘探意义——以元坝地区须三段为例[J]. 石油实验地质, 2013, 35(6): 657-661. Wang Wei. Characteristics of high-energy channel sandstone and its ex-ploration significance: A case from Xujiahe formation in Yuanba area [J]. Petroleum Geology & Experiment, 2013, 35(6): 657-661.
[3] 翟文亮, 郑荣才, 朱如凯, 等. 川东北类前陆盆地须家河期盆-山耦合和层序充填样式[J] . 成都理工大学学报: 自然科学版, 2009, 36(3): 268-275. Zhai Wenliang, Zheng Rongcai, Zhu Rukai, et al. Basin-range coupling and the Upper Triassic sequence filling patterns of Xujiahe Formation in the Northeastern Sichuan analogous foreland basin, China[J]. Journal of Chengdu University of Technology: Science & Technology Edition, 2009, 36(3): 268-275.
[4] 毛琼, 郑荣才, 邹光富, 等. 川东北前陆盆地上三叠统沉积相及沉积演化[J]. 沉积与特提斯地质, 2012, 32(1): 1-11. Mao Qiong, Zheng Rongcai, Zou Guanfu, et al. Upper Triassic sedimen-tary facies and sedimentary evolution in the northeastern Sichuan fore-land basin[J]. Sedimentary Geology and Tethyan Geology, 2012, 32(1): 1-11.
[5] 高红灿. 四川盆地上三叠统须家河组层序-岩相古地理及砂体分布研究[D]. 成都: 成都理工大学, 2007. Gao Hongcan. Study on Sequence-paleogeography and sand body distd-bution of the Xujiahe Formation of Upper Triassicin in Sichuan Basin [D]. Chengdu: Chengdu University of Technology, 2007.
[6] 高红灿, 郑荣才, 柯光明, 等. 川东北前陆盆地须家河组层序-岩相古地理特征[J]. 沉积与特提斯地质, 2005, 25(3) : 38-45. Gao Hongcan, Zheng Rongcai, Ke Guangming, et al. The Upper Trias-sic Xujiahe Formation in the northeastern Sichuan forelandbasin: Se-quencebased sedimentary facies and palaeogeography[J]. Sedimentary Geology and Tethyan Geology, 2005, 25(3): 38-45.
[7] 秦秋寒, 宋效文, 孙玉英, 等. 临江地区扶余-杨I油层气藏分布规律及成藏主控因素[J]. 大庆石油学院学报, 2011, 35(4): 42-46. Qin Qiuhan, Song Xiaowen, Sun Yuying, et al. Major controlling factors of hydrocarbon accumulation in Fuyu-Yang Ⅰ reservoir in Linjiang ar-ea of Songliao basin[J]. Journal Of Daqing Petroleum Institute, 2011, 35 (4): 42-46.
[8] Ghanizadeh A, Clarkson C R, quino S A, et al. Petrophsical and geo-chanical characteristics of Canadian tight oil and liquid-rich gas reser-voirs: II. Geomechanical property estimation[J]. Fue, 2015(153): 682-691.
[9] 郭泽清, 刘卫红, 张林, 等. 中国陆相岩性地层油气藏分布规律和控制因素研究进展[J]. 地质科技情报, 2009, 28(5): 71-77. Guo Zeqing, Liu Weihong, Zhang Lin, et al. Review of distribution and controlling factors for continental lithologic and stratigraphic oil-gas res-ervoirs in China[J]. Geology Science and Technology Information, 2009, 28(5): 71-77.
[10] 张哨楠. 致密天然气砂岩储层: 成因和讨论[J]. 石油与天然气地质, 2008, 29(1): 1-10. Zhang Shaonan. Tight sandstone gas reservoirs: their origin and discus-sion[J]. Oil &Gas Geology, 2008, 29(1): 1-10.
[11] 罗文军, 彭军, 曾小英, 等. 川西丰谷地区须四段钙屑砂岩优质储层形成机理[J]. 石油实验地质, 2012, 34(4): 412-416. Luo Wenjun, Peng Jun, Zeng Xiaoying, et al. Formation mechanism of high-quality reservoir of calcarenaceous sandstone in fourth member of Xujiahe Formation, Fenggu area, Western Sichuan Depression[J]. Petroleum Geology & Experiment, 2012, 34(4): 412-416.
[12] 曾小英, 张小青, 钟玉梅. 川西坳陷中须家河组四段钙屑砂岩气层的成因[J]. 沉积学报, 2007, 25(6): 896-902. Zeng Xiaoying, Zhang Xiaoqing, Zhong Yumei. Origin of calcarena-ceous sandstone gas formation of the 4th member of xujiahe formation in the Middle Part of Western Sichuan depression[J]. Acta Sedmento-logica Science, 2007, 25(6): 896-902.
