Advances in the origin of overpressures in sedimentary basins
Advances in the origin of overpressures in sedimentary basins
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沉积盆地超压成因研究进展
DOI：
10.1016/j.ptlrs.2018.03.007
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发表时间：
2018-03
影响因子：
--
通讯作者：
Zeyang Xu
中科院分区：
文献类型：
--
作者：
Jingzhou Zhao;Jun Li;Zeyang Xu
在过去的一二十年里，对超压机理的研究取得了很大的进展。(1)超压成因可分为五类，即不平衡压实作用、流体膨胀作用、成岩作用、构造挤压作用和压力传递作用。流体膨胀包括生烃、裂解制气和水热膨胀。成岩作用包括蒙皂石向伊利石的转化。(2)提出了测井曲线组合分析、Bowers法(加卸载图法)、速度-密度交会图法、孔隙度对比法、压力计算与对比法、综合分析法等六种识别超压成因的方法。(3)随着经验方法在超压地层研究中的应用越来越多，传统上认为是不平衡压实引起的超压实例几乎全部或部分被否定。相反，生烃作用是超压形成的最重要机制，粘土成岩作用(特别是蒙皂石-伊利石相变)以及构造挤压和压力传递对超压形成也是重要的。此外，许多盆地的超压形成被认为是两种或两种以上超压机制的组合。(4)超压成因因岩性不同而不同；对于泥岩而言，源岩中的超压形成通常不同于非源岩中的超压形成，前者往往与生烃作用有关，有时也受成岩作用的影响，而后者通常与不平衡压实、成岩作用和压力传递有关；对于砂岩等渗透性岩石，超压主要是压力传递引起的。(5)由于有机质对密度、声速等测井参数影响较大，在利用这些测井资料分析富含有机质泥岩超压地层时，需要对有机质含量进行适当的校正。结果表明，基于校正后的测井数据产生超压的原因可能与没有校正前的原因有很大的不同。
Much progress in the studies on overpressuring mechanisms has been made during the past one to two decades. (1) The causes of overpressure are divided into five categories, namely, disequilibrium compaction, fluid expansion, diagenesis, tectonic compression and pressure transfer. The fluid expansion involves hydrocarbon generation, oil cracking to gas and hydrothermal expansion. The diagenesis includes smectite-to-illite transformation. (2) Six methods for identifying overpressure origin are proposed, including log curves combination analysis, Bowers method (loading-unloading diagram), velocity-density crossplotting, correlation of porosities, pressure calculation and correlation, and comprehensive analyses. (3) With more and more application of empirical methods in the study of overpressure formation, almost all of the overpressure cases that are traditionally thought to be caused by disequilibrium compaction are denied totally or partly. Instead, the hydrocarbon generation is demonstrated to be the most significant mechanism for overpressure formation; the clay diagenesis (especially the smectite-illite transformation) as well as tectonic compression and pressure transfer are also important for overpressure formation. In addition, the overpressure formation in many basins is thought to be influenced by the combination of two or more overpressuring mechanisms. (4) Causes of overpressuring differ in lithology; for mudstones, the overpressure formation in source rocks is usually different from that of non-source rocks, the former of which is frequently related to hydrocarbon generation and sometimes also affected by diagenesis, while the later of which is commonly related to disequilibrium compaction, diagenesis and pressure transfer; for permeable rocks such as sandstones, overpressure is mainly caused by pressure transfer. (5) Because organic matter has an obvious influence on logging parameters such as density and acoustic velocity, an appropriate correction on the content of organic matter is needed when these logging data are used to analyze overpressure formation in organic-rich mudstones. It has been revealed that the cause of overpressuring based on the corrected log data can be quite different from that without correction.
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影响因子：
1.7
作者：
R. Lahann;R. Swarbrick
通讯作者：
R. Lahann;R. Swarbrick
DOI：
10.1190/segam2013-0612.1
发表时间：
2013-08
期刊：
Seg Technical Program Expanded Abstracts
影响因子：
--
作者：
Hua Yu;F. Hilterman
通讯作者：
Hua Yu;F. Hilterman
DOI：
--
发表时间：
2004
期刊：
--
影响因子：
--
作者：
M. J. Hoesni
通讯作者：
M. J. Hoesni
影响因子：
1.7
作者：
S. O'Connor;R. Swarbrick;R. Lahann
通讯作者：
S. O'Connor;R. Swarbrick;R. Lahann
影响因子：
1.8
作者：
K. Magara
通讯作者：
K. Magara