碳酸盐岩缝合线与基质的排烃效应——以川东地区石炭系和奥陶系碳酸盐岩为例

doi:10.11743/ogg20170313

摘要/Abstract

摘要： 为了探究碳酸盐岩缝合线与基质的排烃效应及其物质组成的差异，采集了四川盆地东部大池干构造带座3、池53、五科1等取心井含缝合线的石炭系和奥陶系碳酸盐岩岩心样品，进行了缝合线与基质的岩心与铸体薄片观察以及全岩X-射线衍射矿物成分含量、有机碳含量、热解（Rock-Eval）、可溶有机质抽提、族组分分离与定量等实验测试。实验分析表明，缝合线比基质的物质组成有较大差异，这主要与压溶作用有极为密切的关系。由于碳酸盐矿物的压溶作用，缝合线比基质含有更多的白云石、黄铁矿、有机质等不溶物质，矿物颗粒主要呈基底胶结、杂基支撑，基质中的矿物颗粒之间主要呈线状、凹凸状紧密接触。这种矿物组成和结构特征使得缝合线比基质有相对更好的孔渗性，可以成为地质历史时期中碳酸盐岩内部流体排出的重要通道，所以，缝合线的排烃效应比基质明显。对于含有缝合线的低有机质丰度碳酸盐岩来说，缝合线有机质可以作为碳酸盐岩生烃的重要补充。此外，缝合线中较多的可溶有机质对热解参数有一定影响。

关键词: 缝合线, 基质, 有机地球化学, 排烃效应, 碳酸盐岩, 四川盆地

Abstract: This paper discusses the differences of hydrocarbon expulsion and compositions between stylolite and matrix in carbonate rocks.Samples were taken from the Ordovician and Carboniferous carbonate rock cores containing stylolites of Wells Zuo 3,Chi 53 and Wuke 1 in the Dachigan Structure Belt of the Eastern Sichuan Basin.The stylolite and matrix were studied through observation of core and cast thin sections and various tests such as whole rock X-Ray diffraction for mineral components and TOC content,Rock-Eval pyrolysis,solvent extraction and fractionation of extract and so on.The results indicate that there is a relatively large compositional difference between stylolite and matrix in carbonate rocks,and this is intimately related to pressure solution of carbonate mineral.Because of pressure solution,the stylolite contains more indissoluble materials such as dolomite,pyrite,and organic matter than the matrix.The mineral grains in stylolies mainly display basal cementation and matrix-supported fabric.While the mineral grains in the matrix mainly represent linear contact and close contact in concave and convex shapes.This makes stylolite to have better physical properties compared with the matrix,thus acting as important passages for expulsion of fluids in carbonate rocks in geological history.Therefore,the hydrocarbon expulsion effect of stylolite is more evident than that of the matrix.For the stylolite-bearing carbonate rocks with low organic abundance,the organic matter in the stylolite can be a prominent supplement of hydrocarbon generation in carbonate source rocks.In addition,the soluble organic matters relatively abundant in the stylolite have certain effects on Rock-Eval pyrolysis parameters.

Key words: stylolite, matrix, organic geochemistry, hydrocarbon expulsion effect, carbonate rock, Sichuan Basin

中图分类号:

TET22.1

王轩,高岗,李佳烨,等. 碳酸盐岩缝合线与基质的排烃效应——以川东地区石炭系和奥陶系碳酸盐岩为例[J]. 石油与天然气地质, 2017, 38(3): 534-542. doi: 10.11743/ogg20170313 Wang Xuan,Gao Gang,Li Jiaye,et al. Hydrocarbon expulsion of stylolite and matrix in carbonate rocks:A case study from the Ordovician and Carboniferous carbonate rocks in Eastern Sichuan Basin[J]. Oil & Gas Geology, 2017, 38(3): 534-542. doi: 10.11743/ogg20170313

参考文献

[1] Jrda R.Stylolites:measurement of rock loss[J].Revista Brasileira De Geociências,2001,30(3):432-435.
[2] Ramsdom R M.Stylolite and oil migration[J].AAPG Bulletin,1952,36(11):2185-2186.
[3] Finkel E A,Wilkinson B H.Stylolitization as source of cement in Mississippian Salem limestone,west-central Indiana[J].AAPG Bulletin,1990,74(2):174-186.
[4] Wanless H R.Limestone response to stress:Pressure solution and dolomitization[J].Journal of Sediment Research,1979,49(1):328-332.
[5] Tucker,Maurice E.Carbonate sedimentology[J].Oxford London:Blackwell Scientific,1990,18(4):401-402.
[6] 高岗.碳酸盐岩缝合线研究及油气地质意义[J].天然气地球科学,2013,24(2),218-226. Gao Gang.Research status and oil & gas geology significance of carbonate rock stylolite[J].Natural Gas Geoscience,2013,24(2),218-226.
[7] Logan B W,Semeniuk V.Dynamic metamorphism,processes and products in Devonian carbonate rocks,Canning basin,western Australia[J].Journal of Geological Society of Australia,1976:138-145.
[8] Dürrast H,Siegesmund S.Correlation between rock fabrics and physical properties of carbonate reservoir rocks[J].International Journal of Earth Sciences,1999,88(3):392-408.
[9] Park W C,Schot E H.Stylolite:their nature and origin[J].Journal of Sedimentary Petrology,1968,38(1):175-191.
[10] 周大志,李国蓉,罗鹏,等.川东南志留系石牛栏组成岩作用研究[J].天然气技术,2009,3(6):6-11. Zhou Dazhi,Li Guorong,Luo Peng,et al.Diagenesis research of Shiniulan Group of the Silurian in the southeastern Sichuan[J].Natural Gas Technolgy,2009,3(6):6-11.
[11] 高岗.缝合线对碳酸盐岩油气生排运聚的作用[J].西安石油学院学报:自然科学版,2000,15(4):32-36. Gao Gang.Role of stylolite to generation,expulsion,migration and accumulation of hydrocarbon in carbonate rock[J].Xian Petroleum Institute Journal:Natural Sciences,2000,15(4):32-36.
[12] 钟建华,孔凡亮,李阳,等.塔河油田四区奥陶系碳酸盐岩油藏中的缝合线研究[J].地质论评,2010,5(6):841-850. Zhong Jianhua,Kong Fanliang,Li Yang,et al.Stylolite research of the Ordovician carbonate reservior in the forth area of Tahe oil field[J].Geology Review,2010,5(6):841-850.
[13] 柳广弟,高岗,王晖.碳酸盐烃源岩有机质分布与排烃特征[J].沉积学报,1999,17(3):482-485. Liu Guangdi,Gao Gang,Wang Hui.Organi matter distribution and hydrocarbon-expelling characteristics of carbonate source rocks[J].Acta Sedimentologica Sinica,1999,17(3):482-485.
[14] 高岗,郝石生,王晖.碳酸盐基质与缝合线的生烃和排烃特征[J].中国科学:D辑,2000,30(2):175-179. Gao Gang,Hao Shisheng,Wang Hui.Characteristics of hydrocarbon generation and expulsion in matrix and stylolite of carbonate rocks[J].Science in China:series D,2000,30(2):175-179.
[15] 蔡希源.湖相烃源岩生排烃机制及生排烃效率差异性——以渤海湾盆地东营凹陷为例,石油与天然气地质,2012,33(3):329-334. Cai Xiyuan.Hydrocarbon generation-expulsion mechanisms and efficiencies of lacustrine source rocks:a case study from the Dongying sag,Bohai Bay Basin.Oil & Gas Geology[J].2012,33(3):329-334.
[16] 王行信,蔡进功,包于进,等.粘土矿物对有机质生烃的催化作用[J].海相油气地质,2006,11(3):27-38. Wang Xingxin,Cai Jinggong,Bao Yujing,et al.Catalysis of clay mineral to organic matter in hydrocarbon genesis[J].Marine Petroleum Geology,2006,11(3):27-38.
[17] 唐健程,陈红汉,王家豪等.湘东南拗陷上古生界碳酸盐岩储层成岩作用[J].西南石油大学学报,2007,29(6):43-47. Tang Jiancheng,Chen Honghan,Wang Jiahao,et al.The diagenesis of the upper Paleozoic carbonate rocks in the southeast Xiang depression[J].Journal of Southwest Petroleum University,2007,29(6):43-47.
[18] 王大鹏,陆红梅,陈小亮,等.海相碳酸盐岩大中型油气田成藏体系及分布特征[J].石油与天然气地质,2016,(3):363-371. Wang Dapeng,Lu Hongmei,Chen Xiaoliang,et al.Petroleum accumulation systems and distribution of medium to large marine carbonate fields[J].Oil & Gas Geology,2016,(3):363-371.
[19] 田春桃,马素萍,杨燕,等.湖相与海相碳酸盐岩烃源岩生烃条件对比[J].石油与天然气地质,2014,35(3):336-341. Tian Chuntao,Ma Suping,Yang Yan,et al.Comparison of hydrocarbon generation conditions between lacustrine and marine carbonate source rocks[J].Oil & Gas Geology,2014,35(3):336-341.
[20] 荣毅,胡明,谭勇,等.四川盆地东部开江地区石炭系构造演化与油气成藏关系分析[J].重庆科技学院学报(自然科学版),2010,12(3):24-29. Rong Yi,Hu Ming,Tan Yong,et al.Carboniferous tectonic evolution and hydrocarbon accumulation relationship analysis of Kaijiang Area in eastern Sichuan basin[J].Journal of Chongqing University of Science and Technology(Natural Science Edition),2010,12(3):24-29.
[21] 刘满仓,杨威,李其荣,等.四川盆地蜀南地区奥陶系地层划分对比及特征[J].石油天然气学报,2008,5(30):192-197. Liu Mancang,Yang Wei,Li Qirong,et al.Study on characteristics and its stratigraphic classification and correlation of Ordovician in Shunan area of Sichuan Basin[J].Journal of Oil and Gas Technology,2008,5(30):192-197.
[22] 邬铁,谢淑云,张殿伟,等.川南地区灯影组白云岩地球化学特征及流体来源[J].石油与天然气地质,2016,37(5):721-730. Wu Tie,Xie Shuyun,Zhang Dianwei,et al.Geochemical characteristics and fluid origin of the Dengying Formation dolomites in southern Sichuan Basin[J].Oil & Gas Geology,2016,37(5):721-730.
[23] 刘建华,朱西养,王四利,等.四川盆地地质构造演化特征与可地浸砂岩型铀矿找矿前景[J].铀矿地质,2005,21(6):321-330. Liu Jianhua,Zhu Xiyang,Wang Sili,et al.Geologie tectonic evolutional characteristics and prospecting potential.for ISL-amenable sandstone type uranium deposits in Sichuan basin[J].UraniumGeology,2005,21(6):321-330.
[24] 郭彤楼.四川盆地奥陶系储层发育特征与勘探潜力[J].石油与天然气地质,2014,35(3):372-378. Guo Tonglou.Charateristics and exploration potential of Ordovician reservoirs in Sichuan Basin[J].Oil & Gas Geology,2014,35(3):372-378.
[25] 林小兵,刘莉萍,田景春,等.川西坳陷中部须家河组五段致密砂岩储层特征及主控因素[J].石油与天然气地质,2014,35(2):224-230. Lin Xiaobing,Liu Liping,Tian Jingchun,et al.Characteristics and controlling factors of tight sandstone reservoirs in the 5th member of Xujiahe Formation in the central of western Sichuan Depression[J].Oil & Gas Geology,2014,35(2):224-230.
[26] 谭钦银,王瑞华,牟传龙,等.缝合线成因新认识[J].地学前缘,2011,18(2):241-249. Tan Qinyin,Wang Ruihua,Mu Chuanlong,et al.New congnition about stylolite[J].Earth Science Frontiers,2011,18(2):241-249.
[27] 李国蓉.碳酸盐岩中缝合线的形成机制及其储集意义讨论[J].矿物岩石,1997,17(2):49-54. Li Guorong.Discussion on the genetic mechanism of stylolites in carbonate rocks and their significance for storage[J].Journal of Mineral Petroleum,1997,17(2):49-54.
[28] 周波,金之钧,云金表,等.碳酸盐岩油气二次运移距离与成藏[J].石油与天然气地质,2016,37(4):457-463. Zhou Bo,Jin Zhijun,Yun Jinbiao,et al.Secondary oil migration distance and hydrocarbon accumulation in carbonate rocks[J].Oil & Gas Geology,2016,37(4):457-463.
[29] 何胡军,曾大乾,毕建霞,等.普光气田碳酸盐岩储层裂缝的成因及其控制因素[J].海相油气地质,2014,19(4):65-72. He Hujun,Zeng Daqian,Bi Jianxia,et al.Genesis and controlfactors of fractures in Carbonate Reservoirs in Puguang Gas Field[J].Marine Origin Petroleum Geology,2014,19(4):65-72.
[30] 唐海,汪全林,彭鑫岭,等.川东宣汉地区飞仙关组裂缝特征及成因研究[J].西南石油大学学报(自然科学版),2011,33(4):78-84. Tang Hai,Wang Quanlin,Peng Xinling,et al.The study of fracture characteristics and causes at Feixianguan Formation in Xuanhan area of eastern Sichuan[J].Journal of Southwest Petroleum University (Science&Technology Edition),2011,33(4):78-84.
[31] Espitalié J,Deroo G,Marquis F.La pyrolysis Rock-Eval et ses applications.Revue de L'Institut Francais du Pétrole,198540,755-784.
[32] Tissot B P Welte D H.,Petroleum formation and occurrence[M].NewYork:Springer Verlag,1984,
[33] 林会喜,彭苏萍,杜文风,等.渤南洼陷沙四上亚段碳酸盐岩成藏条件与勘探潜力[J].石油与天然气地质,2013,34(2):161-166. Lin Huixi,Peng Suping,Du Wenfeng,et al.Hydrocarbon accumulation conditions and prospecting potentials of carbonate rocks in the Upper Es4 of Bonan Sag[J].Oil & Gas Geology,2013,34(2):161-166.
[34] 陈建平,梁狄刚,张水昌,等.中国古生界海相烃源岩生烃潜力评价标准与方法[J].地质学报,2012,(7):1132-1142. Chen Jianping,Liang Digang,Zhang Shuichang,et al.Evaluation criterion and methods of the hydrocarbon generation potential for China's Paleozoic marine source rocks[J].Acta Geologica Sinica,2012,(7):1132-1142.