Experimental simulation of burial dissolution of clay-bearing carbonate
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摘要: 通过实验模拟埋藏条件下含泥碳酸盐岩的溶蚀过程,分析了粘土矿物的富集程度和赋存状态。实验结果显示,随着压力和温度的增加,粘土矿物含量是一个先增加后降低的过程,在80~160℃时达到极值。而粘土矿物的赋存状态从主要分布于裂缝中到包裹状再到残余于裂缝之中。溶蚀率大致随着温度和压力的增加而增加,实验中在160℃、48MPa条件下获得了最高的溶蚀率。碳酸盐岩泥质含量的差异对溶蚀率影响并不是十分明显,粘土矿物的赋存状态似乎更为重要。随着溶蚀作用的继续,粘土矿物对溶蚀作用有一定的影响,在80~120℃时,粘土矿物减缓了溶蚀率增加的速度,但是温压继续增加时,这种影响又有所减弱。Abstract: The burial dissolution process of claybearing carbonate was simulated with experiment in order to analyze the enrichment and occurrence of clay mineral. As the increase in pressure and temperature, clay mineral content increased at first and then decreased, with 80-160℃ as the turning point. Clay mineral mainly existed in crack, inclusion and residual crack. Dissolution rate increased as temperature and pressure increased, and obtained the biggest value at 160℃ and 48 MPa in experiment. The influence of clay content in carbonate on dissolution rate was not obvious, while the occurrence of clay mineral played a more important role. As dissolution continued, clay mineral delayed the increase of dissolution rate at 80-120℃; however, the influence weakened as temperature and pressure continued increasing.
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Key words:
- clay mineral /
- carbonate /
- dissolution effect /
- burial condition /
- experimental simulation
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[1] 徐同台,王行信,张有瑜,等.中国含油气盆地粘土矿物[M].北京:石油工业出版社,2003. [2] Ehrenberg S,Eberli G,Keramati M,et al.Porosity-permeability relationships in interlayered limestone-dolostone reservoirs[J].AAPG Bulletin,2006,90(1):91-114. [3] 肖林萍.埋藏条件下碳酸盐岩实验室溶蚀作用模拟的热力学模型与地质勘探方向:以陕甘宁盆地下奥陶统马家沟组第五段为例[J].岩相古地理,1997,17(4):57-70. [4] 张文正,杨俊杰,黄月明.碳酸盐岩深埋藏溶蚀成岩过程的实验模拟[J].低渗透油气田,1997(3):34-37. [5] 范明,蒋小琼,刘伟新,等.不同温度条件下CO2水溶液对碳酸盐岩的溶蚀作用[J].沉积学报,2007,25(6):825-829. [6] 蒋小琼,王恕一,范明,等.埋藏成岩环境碳酸盐岩溶蚀作用模拟实验研究[J].石油实验地质,2008,30(6):643-646. [7] 范明,胡凯,蒋小琼.酸性流体对碳酸盐岩储层的改造作用[J].地球化学,2009,38(1):20-26. [8] Luquot L,Gouze P.Experimental determination of porosity and permeability changes induced by injection of CO2 into carbonate rocks[J].Chemical Geology,2009,265:148-159. [9] 范明,徐良发,刘伟新,等.碳酸盐岩白云岩化作用实验地质学研究[J].石油实验地质,2012,34(6):635-640. [10] 袁玉松,范明,刘伟新,等.盖层封闭性研究中的几个问题[J].石油实验地质,2011,33(4):336-340. [11] 李双建,高波,沃玉进,等.中国南方海相油气藏破坏类型及其时空分布[J].石油实验地质,2011,33(1):43-49. [12] 周雁,金之钧,朱东亚,等.油气盖层研究现状与认识进展[J].石油实验地质,2012,34(3):234-245. [13] 沃玉进,汪新伟,袁玉松,等.中国南方海相层系油气保存研究的新探索:"保存系统"的概念与研究方法[J].石油实验地质,2011,33(1):66-73. [14] 刘光祥,沃玉进,潘文蕾,等.中上扬子区海相层系流体特征与油气保存条件[J].石油实验地质,2011,33(1):17-21. [15] 张军涛,吴世祥,李宏涛,等.川东南志留系泥岩盖层水岩相互作用的实验模拟及其研究意义[J].石油实验地质,2011,33(1):36-39. -
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