四川盆地下寒武统膏盐岩发育特征与封盖有效性分析
Development characteristics and sealing effectiveness of Lower Cambrian gypsum rock in Sichuan Basin
-
摘要: 四川盆地下寒武统广泛发育一套膏盐岩，主要沉积于早寒武世龙王庙期。基于四川盆地深井及实测剖面中膏盐岩的识别和统计，发现下寒武统有川南和鄂西两大聚盐区，最厚达690.40m；川南聚盐区西部以含泥含云质石膏岩类和含膏砂泥岩类为主，东部及颚西聚盐区主要为含膏白云岩类。结合前人研究，认为膏盐岩发育于浅水缓坡沉积环境，有潮上萨布哈和缓坡蒸发两类成因。通过对川南聚盐区储盖匹配关系及后期构造与膏盐岩封盖性分析，表明下寒武统膏盐岩与盐下震旦系优质的白云岩储层在空间上具有良好的匹配关系；四川盆地边界大断裂及边界外寒武系的抬升暴露让膏盐岩在盆地外封盖性失效，而在盆地内膏盐岩的封盖性较好。威远气田解剖表明有膏盐岩分布的威远地区成藏，而无膏盐岩分布的资阳地区气藏被破坏，显示了下寒武统膏盐岩在四川盆地油气成藏中具有重要的作用。Abstract: The gypsum rocks which mainly deposited during Longwangmiao Period of the Early Cambrian are widely developed in Sichuan Basin. Based on the identification and statistics of gypsum rocks from the deep drill cores and outcrops, we found that there are two salt concentrated areas: Chuannan salt concentrated area and E'xi salt concentrated area. The thickest gypsum rock unit is 690.40m in the areas. The lithologies are argillaceous and dolomitic gypsum rocks in the western Chuannan area, and gypsum dolomites in the eastern Chuannan area and the E'xi area. In combination with previous studies, we suggest that the gypsum rocks deposited in shallow ramp environments. Two types of genetic models were put forward: tidal sabkha model and ramp evaporation model. The relationship of reservoir to cap, posttectonic and the sealing of gypsum rock in Chuannan salt concentrated area was analyzed in the paper as well. It is shown that the cap of Lower Cambrian gypsum rocks and the Sinian dolomite reservoir are well matched spatially. The sealing of Lower Cambrian gypsum rock is effective in Sichuan Basin. However, it loses sealing effectiveness outside the basin because of the basin boundary faults and the uplift exposure of Cambrian. The case study on Weiyuan gas field indicates that gas accumulates where the gypsum rocks are distributed in Weiyuan area. In contrast, there is no gas accumulation without the distribution of gypsum rock in Ziyang area. The evidence also supports that the gypsum rocks have an important role in the process of gas accumulation in the Sichuan Basin.
-
Key words:
- Lower Cambrian /
- Gypsum rock /
- Sealing effectiveness /
- Weiyuan gas field /
- Sichuan basin
-
-
[1] Aali J, Rahimpour-Bonab H and Kamali MR. 2006. Geochemistry and origin of the world's largest gas field from Persian Gulf, Iran. Journal of Petroleum Science and Engineering, 50(3-4): 161-175
[2] Dai JX, Zou CN, Tao SZ, Liu QY, Zhou QH, Hu AP and Yang C. 2007. Formation conditions and main controlling factors of large gas fields in China. Natural Gas Geoscience, 18(4): 473-484 (in Chinese with English abstract)
[3] Edgell HS. 1996. Salt tectonism in the Persian Gulf Basin. In: Alsop GI, Blundell DJ and Davidson I (eds.). Salt Tectonics. London: Geological Society of London Special Publication, 100: 129-151
[4] Feng ZZ, Bao ZD, Wu MB, Jin ZK and Shi XZ. 2006. Lithofacies palaeogeography of the Cambrian in Tarim area. Journal of Palaeogeography, 8(4): 427-439 (in Chinese with English abstract)
[5] Halbouty MT. 2003. Giant Oil and Gas Fields of the Decade 1990~1999, AAPG Memoir. Tulsa: AAPG, 78: 1-340
[6] He ZX, Zheng CB, Wang CL and Huang DJ. 2005. Cases of discovery and exploration of marine fields in China (Part 2): Jingbian gas field, Ordos Basin. Marine Origin Petroleum Geology, 10(2): 37-44 (in Chinese with English abstract)
[7] Hong HT, Bao Q and Zhang GR. 2000. Evaluation of the favorable target areas for natural gas exploration in the Sinian and Cambrian systems in Sichuan basin. Journal of Chengdu University of Technology, 27(S1): 143-146 (in Chinese with English abstract)
[8] Jackson MPA. 1995. Retrospective salt tectonics. In: Jackson MPA, Roberts DG and Snelson S (eds.). Salt Tectonics: A Global Perspective. AAPG Memoir, 65: 1-28
[9] Jia CZ, Zhao WZ, Wei GQ et al. 2003. Salt structures and exploration of oil and gas. Petroleum Exploration and Development, 30(2): 17-19 (in Chinese with English abstract)
[10] Jin ZJ and Cai LG. 2006. Exploration propects, problems and strategies of marine oil and gas in China. Oil & Gas Geology, 27(6): 722-730 (in Chinese with English abstract)
[11] Jin ZJ, Long SX, Zhou Y et al. 2006. A study on the distribution of saline-deposit in southern China. Oil & Gas Geology, 27(5): 571-583, 593 (in Chinese with English abstract)
[12] Kang YZ. 2007. Conditions and explorative directions of marine giant oil-gas fields of Paleozoic in China. Xinjiang Petroleum Geology, 28(3): 263-265 (in Chinese with English abstract)
[13] Lin LB, Chen HD, Dan Y, Peng YM and Zou H. 2012. Characteristic and genesis of Middle Cambrian gypsum rock in Sichuan Basin. Journal of Jilin University (Earth Science Edition), 42(S2): 95-103 (in Chinese with English abstract)
[14] Lin YT. 2009. Cambrian bittern sediment characteristic and finding potassium prospect in Sichuan Basin. Journal of Salt Lake Research, 17(2): 13-20 (in Chinese with English abstract)
[15] Liu Q and Ma LF. 1994. Lithofacies Paleogeography and Gypsum Deposits of the Lower Cambrian of North China Platform. Beijing: Geological Publishing House (in Chinese)
[16] Ma YS, Chen HD, Wang GL et al. 2009. Sequence Stratigraphy and Palaeogeography of the South China. Beijing: Science Press (in Chinese)
[17] Ran LH, Xie YX and Dai TS. 2008. New knowledge of gas-bearing potential in Cambrian system of southeast Sichuan basin. Natural Gas Industry, 28(5): 5-9 (in Chinese with English abstract)
[18] Song Y and Liu SB. 2008. Main conditions for formation of middle-large gas fields and the potential gas exploration areas in China. Earth Science Frontiers, 15(2): 109-119 (in Chinese with English abstract)
[19] Wan GM, Tang LJ, Jin WZ and Yu YX. 2008. Function of salt rock in Kuqa sag. Journal of Southwest Petroleum University (Science & Technology Edition), 30(1): 14-17 (in Chinese with English abstract)
[20] Zeng LK, Wu RS, Luo DX et al. 1992. Lithofacies Palaeogeography and Sedimentary Stratabound Deposits during Cambrian in Sichuan Province. Chengdu: Sichuan Science and Technology Press (in Chinese)
[21] Zhang SC, Liang DG, Zhu GY et al. 2007. The geological basis for the formation of marine oil and gas fields of the China. Chinese Science Bulletin, 52(S1): 19-31 (in Chinese)
[22] Zhang Y, Chen HM, Liu WH et al. 1992. Sedimentary Facies and Salification Conditions of Carboniferous Saline Basins, Hunan and Jiangxi. Beijing: Seismological Press (in Chinese)
[23] 戴金星, 邹才能, 陶士振, 刘全有, 周庆华, 胡安平, 杨春. 2007. 中国大气田形成条件和主控因素. 天然气地球科学, 18(4): 473-484
[24] 冯增昭, 鲍志东, 吴茂炳, 金振奎, 时晓章. 2006. 塔里木地区寒武纪岩相古地理. 古地理学报, 8(4): 427-439
[25] 何自新, 郑聪斌, 王彩丽, 黄道军. 2005. 中国海相油气田勘探实例之二: 鄂尔多斯盆地靖边气田的发现与勘探. 海相油气地质, 10(2): 37-44
[26] 洪海涛, 包强, 张光荣. 2000. 对四川盆地天然气资源的潜在接替层系——震旦、寒武系有利目标区块的评价. 成都理工学院学报, 27(增刊): 143-146
[27] 贾承造, 赵文智, 魏国齐, 刘德来, 张君峰. 2003. 盐构造与油气勘探. 石油勘探与开发, 30(2): 17-19
[28] 金之钧, 蔡立国. 2006. 中国海相油气勘探前景、主要问题与对策. 石油与天然气地质, 27(6): 722-730
[29] 金之均, 龙胜祥, 周雁等. 2006. 中国南方膏盐岩分布特征. 石油与天然气地质, 27(5): 571-583, 593
[30] 康玉柱. 2007. 中国古生代海相大油气田形成条件及勘探方向. 新疆石油地质, 28(3): 263-265
[31] 林良彪, 陈洪德, 淡永等. 2012. 四川盆地中寒武统膏盐岩特征与成因分析. 吉林大学学报(地球科学版), 42(增刊2): 95-103
[32] 林耀庭. 2009. 四川盆地寒武系盐卤沉积特征及找钾前景. 盐湖研究, 17(2): 13-20
[33] 刘群, 马丽芳. 1994. 华北早寒武世岩相古地理与膏盐沉积. 北京: 地质出版社
[34] 马永生, 陈洪德, 王国力等. 2009. 中国南方层序地层与古地理. 北京: 科学出版社
[35] 冉隆辉, 谢姚祥, 戴弹申. 2008. 四川盆地东南部寒武系含气前景新认识. 天然气工业, 28(5): 5-9
[36] 宋岩, 柳少波. 2008. 中国大型气田形成的主要条件及潜在勘探领域. 地学前缘, 15(2): 109-119
[37] 万桂梅, 汤良杰, 金文正, 余一欣. 2008. 盐岩在库车拗陷中的作用. 西南石油大学学报(自然科学版), 30(1): 14-17
[38] 曾良鍨, 吴荣森, 罗代锡等. 1992. 四川省寒武纪岩相古地理及沉积层控矿产. 成都: 四川科技出版社
[39] 张水昌, 梁狄刚, 朱光有, 张兴阳, 张宝民, 陈建平, 张斌. 2007. 中国海相油气田形成的地质基础. 科学通报, 52(增刊): 19-31
[40] 张瑛, 陈宏明, 刘卫红等. 1992. 湘赣石炭纪膏盐盆地沉积相及成盐条件. 北京: 地震出版社
-
计量
- 文章访问数: 4794
- PDF下载数: 4755
- 施引文献: 0
下载: